JP2002143882A - Contact material for water treatment and method for manufacturing the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a contact material for water treatment and a method for manufacturing the contact material for water treatment which sufficiently maintains the holding amount of microorganisms per unit volume of the contact material, which is excellent in the removing rate of soluble organic substances in the water to be treated and further excellent in the removing rate of P compounds and N compounds and which makes the maintenance of the facility easy. SOLUTION: The contact material for water treatment is a formed body having an organic resin as a matrix and preferably in the form of a Raschig ring, or in a spiral form with metal wires as the axial cores, or a form having a spheric profile and a space to be used as the passage of water. The formed body contains a moisture absorbing powder material, fibers and inorganic powder material having >=2.0 g/cm3 density. In the method for manufacturing the contact material for water treatment, a mixture containing an organic resin powder material, moisture absorbing powder material and inorganic powder material having >=2.0 g/cm3 density is molded by extrusion under the condition of heating, then the molded product is made to absorb moisture, and fibers are deposited on the moisture-absorbed molded produce by using an oil binder. The obtained molded body with deposition of fibers is molded by extrusion under the condition of heating.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

TECHNICAL FIELD The present invention relates to purification of household wastewater,
The contact material for water treatment used for sewage treatment, river purification, pond purification, lake purification, etc., and in particular, water that is decomposed and removed by microorganisms holding organic substances soluble in water in the water to be treated on the surface of the contact material Contact material for treatment, contact material for water treatment for removing nitrogen compound (hereinafter also referred to as N compound) and phosphorus compound (hereinafter also referred to as P compound) in water to be treated, and production of the contact material for water treatment About the method.

[0002]

2. Description of the Related Art In recent years, a biofilm method (biological fixation method) has been used as a water treatment technique. In the biofilm method, a microorganism is used as a contact material for water treatment [a microorganism support (hereinafter, also referred to as a contact material)].
Is fixed (held) in the form of a film on the solid surface which is
This is a water treatment method in which target water to be treated is brought into contact, and organic substances soluble in water are decomposed and removed by microorganisms.

As the biofilm method described above, there are (1) a fixed-bed (layer) type biofilm method in which a contact material is used as a fixed bed, and (2) a floating contact material which has a specific gravity of 1 or less and floats in water. The method is roughly classified into a fluidized bed (bed) type biofilm method using a fluid contact material capable of flowing in water (hereinafter, referred to as a fluid contact material). Sand, anthracite, activated carbon, plastic, and the like are used as the contact material (support).

[0004] By using the biofilm method (biological fixation method), the BOD (biochemical oxygen consumption (organic matter)] and COD (chemical oxygen consumption) of the water to be treated can be reduced. Furthermore, by using a fixed bed densely packed with the contact material, or by fixing the floating contact material in the water to be treated using a net or the like, the BOD of the water to be treated,
In addition to reducing COD, it is possible to remove SS (suspended matter (suspended matter)) in the water to be treated by the filtering action of the contact material.

However, a contact material (hereinafter, also referred to as a microorganism-immobilizing carrier for water treatment or a microorganism-immobilizing carrier) used for fixing (holding) microorganisms used in the conventional biofilm method is described in the following [1. ] And [2]. [1] Problems of the contact material in the fixed-bed (layer) type biofilm method: (1) The amount of microorganisms retained per unit volume of the contact material is insufficient, and soluble organic matter (hereinafter referred to as soluble organic matter) Is not always sufficient.

(2) Whether the microbial membrane is enlarged due to the growth of microorganisms on the surface of the contact material and clogging of the contact material occurs,
Alternatively, it is difficult to remove the attached sludge formed by the enlargement of the microbial membrane on the surface of the contact material, which has a problem in equipment maintenance. [2] Problems of the contact material in the fluidized bed (bed) type biofilm method: (1) The amount of microorganisms retained per unit volume of the contact material is not sufficient, and the effect of removing soluble organic substances is not necessarily sufficient.

(2) Conventional floating contact material and fluid contact material
Is made of resin such as polypropylene,
Insufficient affinity for water and poor contact with water
Removal of soluble organic matter per unit volume of contact material is not necessarily
not enough. In the conventional biofilm method,
Ammonia nitrogen in water (hereinafter NH _Four-N)
Nitrate nitrogen and nitrite nitrogen (hereinafter referred to as NO_X-N and
Is high, but the phosphorus (P) removal rate is low.
There was a problem.

[0008]

SUMMARY OF THE INVENTION The present invention solves the above-mentioned problems of the prior art, ensures a sufficient amount of microorganisms per unit volume of the contact material, and improves the removal rate of soluble organic matter in the water to be treated. An object of the present invention is to provide a contact material for water treatment which is excellent, and further, has an excellent removal ratio of P compounds and N compounds in the water to be treated, and a method for producing the contact material for water treatment.

Further, the present invention provides a water treatment for preventing clogging of a contact material in a biofilm method or removing adhering sludge formed on a contact material surface due to an enlargement of a microbial membrane, and facilitating maintenance of equipment. It is intended to provide a contact material for use.

[0010]

Means for Solving the Problems The first invention is a molded article using an organic resin as a base material (matrix), and has a hygroscopic powder, fiber and density of 2.0 g / cm ³ or more, more preferably. Is a contact material for water treatment, which is a molded article containing an inorganic powdery material of 2.0 g / cm ³ or more and 5.0 g / cm ³ or less.

In the first aspect, the organic resin is preferably a thermoplastic resin (a first preferred embodiment of the first aspect). Further, the first invention, the first invention described above.
In the first preferred embodiment of the present invention, the hygroscopic powder is preferably a vegetable powder (a second preferred embodiment of the first invention).

In the first aspect and the first preferred embodiment of the first aspect, it is particularly preferable that the hygroscopic powder is wood flour (third aspect of the first aspect). Aspect). Further, in the above-mentioned first invention and the first to third preferred embodiments of the first invention, the above-mentioned fiber is a synthetic fiber made of an organic resin, or a regenerated fiber made from regenerated cellulose as a raw material. It is preferably one or more selected from the group consisting of coconut fiber, coconut fiber, peanut shell fiber, and decocted peanut shell fiber (fourth preferred embodiment of the first invention).

Further, as the chemical fiber composed of an organic resin in the fourth preferred embodiment of the first invention, a fiber composed of a thermoplastic resin is preferable (fifth preferred embodiment of the first invention). ). Further, in the fourth preferred embodiment and the fifth preferred embodiment of the first invention described above, the chemical fiber composed of an organic resin and the regenerated fiber made from regenerated cellulose are fibers composed of a crystalline organic resin. In the case of, the melting point of the organic resin which is the base material of the molded body, the synthetic fiber composed of an organic resin higher than the softening temperature, it is preferable to use a recycled fiber, and also composed of an amorphous organic resin In the case of fiber, it is preferable to use a chemical fiber or a regenerated fiber composed of an organic resin whose softening temperature is higher than the melting point and the softening temperature of the organic resin which is the base material of the molded article (the sixth invention of the first invention). Preferred embodiment).

Further, in the first and third preferred embodiments of the first invention and the first invention, the fiber is preferably made of acrylic fiber and / or nylon from the viewpoint of melting point and softening temperature. Particularly preferred are fibers (first
Seventh preferred embodiment of the invention). Further, in the above-mentioned first invention and the first to seventh preferred embodiments of the first invention, the density is 2.0 g / cm ³ or more, more preferably
It is preferable that the inorganic powdery granules having a content of 2.0 g / cm ³ or more and 5.0 g / cm ³ or less are alkaline earth metal carbonates and / or talc (an eighth preferred embodiment of the first invention).

Further, in the first invention and the first to seventh preferred embodiments of the first invention, the density is 2.0 g / cm ³ or more, more preferably 2.0 g / cm ^3. Above, 5.
It is particularly preferable that the inorganic powder having a particle size of 0 g / cm ³ or less is calcium carbonate (a ninth preferred embodiment of the first invention). In the first invention and the first to ninth preferred embodiments of the first invention, the compact preferably further contains quartz porphyry (the tenth aspect of the first invention). Preferred embodiment).

Further, in the first invention and the first to tenth preferred embodiments of the first invention, it is preferable that the molded body further contains a petiole and / or iron powder ( Eleventh preferred embodiment of the first invention). Further, in the first invention and the first to eleventh preferred embodiments of the first invention described above, it is preferable that the molded body is a Raschig ring-shaped molded body having a hollow cylinder (first aspect). Twelfth preferred embodiment of the invention).

Further, in the first invention and the first to eleventh preferred embodiments of the first invention, the molded body is a spiral-shaped molded body having a metal wire as its axis. Preferably, there is (the thirteenth preferred embodiment of the first invention). Further, the first invention described above, the first invention of the first invention,
In the preferred embodiment to the eleventh preferred embodiment, the molded body is a spherical molded body formed by rounding a cord-shaped molded body, and has a space in the molded body that serves as a water flow path. It is preferably a molded article (a fourteenth preferred embodiment of the first invention).

Further, in the first invention and the first to fourteenth preferred embodiments of the first invention, the molded body is a foam having a group of apertures on the surface of the molded body. Is preferable (a fifteenth preferred embodiment of the first invention). Further, the contact material for water treatment according to the first to fifteenth preferred embodiments of the first invention and the first invention is particularly preferably used as a carrier for immobilizing microorganisms for water treatment. Sixteenth aspect of the invention
Preferred embodiment).

Further, in the first invention and the first to sixteenth preferred embodiments of the first invention described above, the content of the hygroscopic powder of the molded article is preferably the same as that of the organic resin: 100
It is preferably from 10 to 30 parts by mass relative to parts by mass (a seventeenth preferred embodiment of the first invention). Further, in the first invention and the first to seventeenth preferred embodiments of the first invention, the fiber content of the molded article is 1 to 100 parts by mass of the organic resin. The amount is preferably from 10 to 10 parts by mass, more preferably from 2 to 8 parts by mass (the eighteenth preferred embodiment of the first invention).

In the first invention and the first to eighteenth preferred embodiments of the first invention, the density is 2.0 g / cm ³ or more, more preferably 2.0 g / cm ^3. Above, 5.
The content of the inorganic powder of 0 g / cm ³ or less is the same as that of the organic resin:
It is preferably from 5 to 15 parts by mass per 100 parts by mass (the nineteenth preferred embodiment of the first invention). In addition, the first
In a tenth preferred aspect of the present invention, the content of quartz porphyry in the above-mentioned molded product is preferably 1 to 10 parts by mass with respect to 100 parts by mass of the organic resin (the first invention). No.
20 preferred embodiments).

[0021] In the eleventh preferred embodiment of the first invention, the content of the petiole and / or iron powder of the above-mentioned molded product in total is 100 parts by mass of the organic resin. It is preferably 5 to 15 parts by mass (a twenty-first preferred embodiment of the first invention). A second invention is an organic resin powder,
Hygroscopic powder or granular material and density of 2.0 g / cm ³ or more, more preferably 2.0 g / cm ³ or more, 5.0 g / cm ³ or less of the inorganic powder or granular material, or the mixture heated under further contains quartz porphyry Extrusion molding, after the obtained molded article is made to absorb moisture, fibers are adhered to the moisture-absorbing molded article using an oily binder, and the obtained fiber-adhered molded article is extruded under heating conditions. This is a method for producing a contact material for water treatment.

According to a third aspect of the present invention, there is provided an organic resin powder, a hygroscopic powder and a density of 2.0 g / cm ³ or more, more preferably 2.0 g / cm ³ or more.
m ³ or more, 5.0 g / cm ³ or less of the inorganic powder or granular material, as well as red iron and / or iron powder or the mixture heated under further contains quartz porphyry, and extruded, allowed moisture molded product obtained After that, the fiber was adhered to the moisture-absorbing molded article using an oily binder, and the obtained fiber-adhered molded article was heated under
This is a method for producing a contact material for water treatment, which is characterized by extruding.

In the second and third aspects of the present invention, the organic resin particles are preferably thermoplastic resin particles (the first preferred embodiment of the second invention, the third preferred embodiment). First preferred embodiment of the invention). Further, the second invention described above,
In the first preferred embodiment of the second invention, the third invention, and the first preferred embodiment of the third invention, it is preferable that the hygroscopic granules are vegetable granules (the second granules). Second preferred embodiment of the invention, second preferred embodiment of the third invention).

Further, in the second invention, the first preferred embodiment of the second invention, the third invention, and the first preferred embodiment of the third invention, the hygroscopic powdery granules may be wood powder. (Mokufun)
Is particularly preferable (third preferred embodiment of the second invention, third preferred embodiment of the third invention). In the second invention, the first preferred embodiment to the third preferred embodiment of the second invention, the third invention, the first preferred embodiment to the third preferred embodiment of the third invention, The fiber is one or two selected from a synthetic fiber composed of an organic resin, a regenerated fiber made from regenerated cellulose, coconut shell fiber, a fiber of a peanut shell, and a fiber of a decocted peanut shell. It is preferably at least one species (fourth preferred embodiment of the second invention, fourth preferred embodiment of the third invention).

In the fourth preferred embodiment of the second invention and the fourth preferred embodiment of the third invention, the chemical fiber composed of the organic resin is a fiber composed of a thermoplastic resin. (Fifth preferred embodiment of the second invention, fifth preferred embodiment of the third invention). Further, the fourth preferred embodiment, the fifth preferred embodiment, and the third preferred embodiment of the second invention described above.
In the fourth preferred embodiment and the fifth preferred embodiment of the present invention,
As the synthetic fiber composed of the above-described organic resin and the regenerated fiber made from regenerated cellulose, in the case of a fiber composed of a crystalline organic resin, the melting point is the melting point of the organic resin which is the base material of the molded product, It is preferable to use a chemical fiber composed of an organic resin higher than the softening temperature, and a regenerated fiber, and in the case of a fiber composed of an amorphous organic resin, the softening temperature of the organic resin which is the base material of the molded article is used. It is preferable to use chemical fibers and regenerated fibers composed of an organic resin having a melting point and a softening temperature higher than the softening temperature (a sixth preferred embodiment of the second invention and a sixth preferred embodiment of the third invention).

Further, the first to third preferred embodiments of the second invention and the second invention described above, the first to third preferred embodiments of the third and third inventions, and the third preferred embodiment In the above, from the viewpoint of melting point and softening temperature, it is particularly preferable that the above-mentioned fiber is an acrylic fiber and / or a nylon fiber (the seventh preferred embodiment of the second invention, the seventh preferred embodiment of the third invention). Aspect).

Also, the first to seventh preferred aspects of the second and second aspects of the invention, the first to seventh preferred aspects of the third and third aspects of the invention, and the like. In the above, the inorganic powder having the density of 2.0 g / cm ³ or more, more preferably 2.0 g / cm ³ or more and 5.0 g / cm ³ or less is a carbonate and / or talc of an alkaline earth metal. (Eighth preferred embodiment of the second invention, eighth preferred embodiment of the third invention).

Also, the first to seventh preferred aspects of the second and second aspects of the invention, the first to seventh preferred aspects of the third and third aspects of the invention, and the like. In the above, it is particularly preferred that the inorganic powder having the density of 2.0 g / cm ³ or more, more preferably 2.0 g / cm ³ or more and 5.0 g / cm ³ or less is calcium carbonate (the second invention) Ninth preferred embodiment,
Ninth preferred embodiment of the third invention).

Further, the first to ninth preferred embodiments of the second invention and the second invention described above, the first to ninth preferred embodiments of the third and third inventions, and the like. In the above, the oily binder is preferably a vegetable oil and / or a mineral oil, and it is particularly preferable to use at least a vegetable oil as the oily binder (the second aspect of the present invention).
Tenth preferred embodiment, tenth preferred embodiment of the third invention).

Further, the above-mentioned second invention, the first preferred embodiment to the tenth preferred embodiment of the second invention, the third invention, the first preferred embodiment to the tenth preferred embodiment of the third invention. It is preferable that the compounding amount of the hygroscopic powder in the above is 10 to 30 parts by mass with respect to 100 parts by mass of the organic resin powder (the eleventh preferred embodiment of the second invention, the third invention). Eleventh preferred embodiment of the invention).

Further, the above-mentioned second invention, the first preferred embodiment to the eleventh preferred embodiment of the second invention, the third invention, and the first preferred embodiment to the eleventh preferred embodiment of the third invention. Is preferably 1 to 10 parts by mass with respect to 100 parts by mass of the organic resin powder and granules, and more preferably 2 to 10 parts by mass.
To 8 parts by mass (the second aspect of the second invention).
Twelfth preferred embodiment, twelfth preferred embodiment of the third invention).

Also, the above-mentioned second invention, the first preferred embodiment to the twelfth preferred embodiment of the second invention, the third invention, and the first preferred embodiment to the twelfth preferred embodiment of the third invention. The density is 2.0 g / cm ³ or more, more preferably 2.0 g / cm ³ or more,
It is preferable that the compounding amount of the inorganic powder particles of 5.0 g / cm ³ or less is 5 to 15 parts by mass with respect to 100 parts by mass of the organic resin particles (total amount of the second invention). Thirteenth preferred embodiment, thirteenth preferred embodiment of the third invention).

Also, the above-mentioned second invention, the first preferred embodiment to the thirteenth preferred embodiment of the second invention, the third invention, the first preferred embodiment to the thirteenth preferred embodiment of the third invention. The amount of the quartz porphyry is preferably 1 to 10 parts by mass with respect to 100 parts by mass of the organic resin particles (the fourteenth preferred embodiment of the second invention and the third invention). 14th preferred embodiment).

Further, in the third invention and the first to fourteenth preferred embodiments of the third invention, the blending amount of the petiole and / or iron powder is a total amount of the organic resin. Granular body: preferably 5 to 15 parts by mass per 100 parts by mass (15th preferred embodiment of the third invention). Further, the second invention and the first preferred embodiment to the fourteenth invention of the second invention are described.
In the preferred embodiment, the third invention, and the first preferred embodiment to the fifteenth preferred embodiment of the third invention, the blending amount of the oily binder is 1 to 100 parts by mass of the organic resin particles.
It is preferably 15 parts by mass.

[0035]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, the present invention will be described in more detail. The present inventors have conducted intensive studies in order to solve the above-mentioned problems, and as a result, have found the following findings [1] the effect of adding an additive to the water treatment contact material, and [2] the shape effect of the water treatment contact material. The present invention has been reached.

[1] Effect of adding additive to water treatment contact material: In an organic resin which is a base material (matrix) of a water treatment contact material (hereinafter also referred to as a contact material), (1) preferably Hygroscopic granules which are plant granules such as wood flour and (2)
Fiber and (3) inorganic granules having a density of 2.0 g / cm ³ or more, preferably carbonates and / or talc of alkaline earth metal, or further (4) quartz porphyry, (5) petals and / or
Alternatively, by adding iron powder, the following effects (1) to (5) can be obtained for the reasons described below.

(1) Effect of blending of hygroscopic powder: Moisture in the hygroscopic powder evaporates when the raw material mainly composed of an organic resin is formed under heating conditions (hereinafter also referred to as heating / forming). Then, it acts as a foaming agent, and a large number of pores (pore group) are formed in the molded body. As a result, the surface area per unit volume of the contact material (molded product) increases, and the amount of microorganisms retained per unit volume of the contact material increases.

From the viewpoint of the wettability of the contact material with water, the mobility (water flowability) of the contact material in the water to be treated is improved, and the contact between the contact material and the water to be treated in the fluidized-bed water treatment apparatus is improved. Probability can be increased. Moreover,
The following effects can be obtained in addition to the above effects by preferably adding vegetable powders such as wood flour as the hygroscopic powder.

Vegetable particles such as wood flour are well compatible with microorganisms and promote the fixation and growth of microorganisms. Molding of raw materials mainly composed of organic resin under heating conditions (:
The fluidity of the melt during heating / forming) can be adjusted, and a contact material of any shape can be stably obtained.

(2) Effect of blending fibers: A complex three-dimensional spatial structure is formed on the surface of the contact material, and the amount of microorganisms retained per unit volume of the contact material increases. The strength of the contact material can be maintained. (3) Effect of blending inorganic powder having a density of 2.0 g / cm ³ or more: The specific gravity of a contact material having a matrix of an organic resin having a density of about 1 g / cm ³ can be freely adjusted, and a fluidized bed In the water treatment apparatus of the type, a contact material having excellent mobility (water flowability) in the water to be treated can be obtained, and the contact probability between the contact material and the water to be treated can be increased.

By blending the inorganic particles,
From the viewpoint of the wettability of the contact material with water, the mobility (fluidity) of the contact material in the water to be treated is improved, and the probability of contact between the contact material and the water to be treated is further increased in a fluidized-bed water treatment apparatus. be able to. By blending an alkaline earth metal carbonate such as calcium carbonate and / or talc as an inorganic powder having a density of 2.0 g / cm ³ or more, the following effects can be obtained in addition to the above effects. .

The above-mentioned carbonate and talc are excellent in compatibility with the organic resin as a base material (matrix), and can provide a contact material having high strength. The fluidity of the melt during molding under heating conditions (: heating / molding) can be adjusted, and a contact material of any shape can be stably obtained. (4) Effect of the mixture of quartz porphyry: The microorganisms fixed on the contact material can be activated and proliferated, and the amount of microorganisms retained in the contact material can be increased.

From the viewpoint of the wettability of the contact material with water, the mobility (water flowability) of the contact material in the water to be treated is improved, and the contact between the contact material and the water to be treated in a fluidized-bed water treatment apparatus is improved. The probability can be further increased. (5) Effect of blending red iron oxide and iron powder: phosphorus in the water to be treated can be removed.

[2] Shape effect of contact material for water treatment: (1) Raschig-ring shaped molded article of hollow cylinder: The above-mentioned Raschig-shaped molded article has a large surface area per unit volume. The contact time with
Due to the synergistic effect with the effect of adding the additive, the treatment capacity by the contact material is further improved, and the water treatment apparatus using the contact material can be operated at a high load.

Further, even if the microorganisms fixed on the surface of the contact material are enlarged, clogging hardly occurs and the operation can be continued for a long time. (2) Spiral shaped body having a metal wire as a shaft core: In particular, when using an aeration type water treatment device, a spiral shaped contact material having a metal wire as a shaft automatically expands and contracts due to spring elasticity. As a result, the sludge on the surface of the contact material easily peels off, and the maintenance of the water treatment apparatus becomes easy.

When a water treatment device other than the aeration method is used, a vibration imparting device is additionally provided, and a spiral contact material having a metal wire as a shaft is made to expand and contract, so that the water treatment is performed in the same manner as described above. Maintenance of the processing apparatus becomes easy. (3) A molded body obtained by rounding a string-shaped molded body and having a spherical outline: a molding having a spherical outline formed by rolling a string-shaped molded body and having a space in the molded body that serves as a flow path for water. By using the body as a contact material for water treatment, even if the microorganisms fixed on the surface of the contact material are enlarged, clogging hardly occurs and the operation can be continued for a long time.

Hereinafter, [I] a contact material for water treatment of the present invention, [II]
The method for producing the contact material for water treatment of the present invention will be described in the order. [I] The contact material for water treatment of the present invention: The contact material for water treatment of the present invention (the first invention) is a molded article made of an organic resin as a base material, and has a hygroscopic powder, a fiber and a density. Is a compact containing 2.0 g / cm ³ or more of inorganic powder.

Hereinafter, [1] in the present invention (first invention)
The effect of adding an additive to the contact material for water treatment, [2] the shape effect of the contact material for water treatment, and [3] a preferred embodiment will be described. [1] Effect of adding additive to contact material for water treatment: In organic resin which is a base material (matrix) of contact material for water treatment (: contact material), (1) preferably plant material such as wood flour Hygroscopic granules and (2) fibers, and (3) inorganic granules having a density of 2.0 g / cm ³ or more, preferably a carbonate and / or talc of an alkaline earth metal, or Furthermore, the following effects (1) to (5) can be obtained by incorporating (4) quartz porphyry, (5) red iron oxide and / or iron powder.

(1) Blending effect of hygroscopic powder: increase of microorganism retention: molding under heating conditions of organic resin containing hygroscopic powder which has been absorbed (heating / forming)
At times, the moisture in the hygroscopic granules rapidly evaporates and serves as a foaming agent. As a result, a complex three-dimensional space structure is formed on the surface of the molded body, as shown in a micrograph and a schematic diagram of the surface of the molded body described later (FIGS. 6A and 6B). The surface area per volume can be significantly increased, and the amount of microorganisms retained per unit volume of the contact material can be increased.

When a foaming agent, which is generally used as a plastic additive, is used as the foaming agent, pores on the surface of the molded body are coarsened, the surface strength of the molded body is excellent, and the surface area per unit volume of the molded body is large. It is difficult to obtain a large compact. Increase in the probability of contact between the contact material and the water to be treated: Since hygroscopic powders such as vegetable powders are more compatible with water than plastics, hygroscopic powders such as vegetable powders are formed in the compact. By incorporating the granules, it is possible to obtain a contact material having excellent mobility (water flowability) in the water to be treated. In a fluidized-bed water treatment apparatus, the contact probability between the contact material and the water to be treated can be reduced. Can be enhanced.

Furthermore, preferably, plant moisture such as wood flour is contained as the moisture-absorbing powder,
In addition to the above effects, the following effects can be obtained. Immobilization of microorganisms and promotion of growth: Microorganisms are well compatible with plant powders such as wood flour, and inclusion of plant powders in organic resins promotes the fixation and growth of microorganisms.

Improvement of moldability: In the case of a conventional plastic contact material, it was difficult to obtain a contact material of any shape even by extrusion molding under heating conditions. On the other hand, by incorporating vegetable powders such as wood flour into the organic resin that is the raw material of the molded body, the viscosity of the molten resin can be easily adjusted, and the contact material of any shape can be stably formed. Obtainable.

(2) Effect of blending fibers: Increase in the amount of microorganisms retained: During heating and molding of the organic resin containing fibers, the spring back (repulsion) effect of the fibers causes the surface of the contact material (molded product) to be cauliflower-like. Further, a more complicated porous three-dimensional spatial structure is formed, and the amount of microorganisms retained per unit volume of the contact material can be increased.

Maintaining strength of molded article: As described above, a molded article which is a contact material of the present invention has a large number of pores (a group of pores), and the strength of the molded article can be maintained by fibers. (3) Mixing effect of inorganic powder having a density of 2.0 g / cm ³ or more: Increase in the contact probability between the contact material and the water to be treated: As described above, since the specific gravity of the conventional plastic contact material is as low as about 1 When used in a fluidized-bed water treatment device, the contact material floats near the surface of the water to be treated even in a water treatment device of a violent method,
The contact probability between the contact material and the water to be treated is low.

On the other hand, the density of the molded product is 2.6 to
3.0 g / cm ³ density, such as calcium carbonate is around the 2.0 g / cm ³
As described above, more preferably, by incorporating an inorganic powder having a density of 2.0 g / cm ³ or more and 5.0 g / cm ³ or less, for example, an organic resin having a density of about 1 g / cm ³ can be used as a base material (matrix).
The specific gravity of the contact material (compact) can be freely adjusted. As a result, in the fluidized-bed type water treatment apparatus, a contact material having excellent mobility (water flowability) in the water to be treated can be obtained, and the contact probability between the contact material and the water to be treated can be increased.

Further, by blending the inorganic powder with the organic resin which is inferior to water, the mobility of the contact material in the water to be treated (fluidity in water) in view of the wettability of the contact material with water. And the contact probability between the contact material and the water to be treated can be further increased in the fluidized-bed water treatment apparatus. Further, by blending a carbonate of alkaline earth metal such as calcium carbonate and / or talc as an inorganic powder having a density of 2.0 g / cm ³ or more,
In addition to the above effects, the following effects can be obtained.

[0057] The density of the present invention is preferably defined by d ₄ ^25. Improvement of strength of contact material: The above-mentioned carbonate and talc have excellent compatibility with an organic resin as a base material (matrix), and a contact material having high strength can be obtained. Improvement of moldability: By mixing the above-mentioned carbonate and / or talc, the fluidity of the melt at the time of molding under heating conditions (: heating and molding) can be adjusted, and the contact material of any shape can be stabilized. Can be obtained.

(4) Mixing effect of quartz porphyry: Increase in microbial retention: Quartz porphyry supplies minerals and negative ions into water and has a wavelength of 4 to 4 based on the energy absorbed during the rock formation process. It emits far-infrared rays called 14μm growth rays.

As a result, by incorporating quartz porphyry in the contact material for water treatment, the microorganisms fixed to the contact material can be activated and proliferated, and the amount of microorganisms retained in the contact material can be increased. Increased probability of contact between contact material and treated water: Quartz porphyry
Because it is more compatible with water than plastic, by incorporating quartz porphyry in the contact material (compact),
A contact material having excellent mobility (water flowability) in the water to be treated can be obtained.

As a result, in the fluidized-bed water treatment apparatus, the contact probability between the contact material and the water to be treated can be increased. (5) Blend effect and / or blending effect of iron powder (metallic iron powder):
By incorporating the petiole in the contact material, iron oxide elutes in the water as iron ions, and combines with phosphoric acid in the water due to the potential difference to produce iron phosphate.

Further, by incorporating iron powder (metallic iron powder) into the contact material, the generated iron oxide is eluted in the water as iron ions, and binds to the phosphoric acid in the water in the same manner as in the above-described red iron oxide. This produces iron acid. Since iron phosphate is hardly soluble or insoluble in water, phosphorus in the water to be treated can be removed by sedimentation or filtration of the generated iron phosphate.

[2] Shape effect of contact material for water treatment: (1) Raschig ring shaped compact of hollow cylinder: In the present invention, the shape of the contact material (molded body) for water treatment is a Raschig ring shape of a hollow cylinder. By increasing the surface area per unit volume of the contact material, the contact time of the water to be treated with the contact material is prolonged, and the synergistic effect with the additive effect of the additive described above, the treatment capacity per contact material unit volume Is further improved,
High load operation of the water treatment device using the contact material becomes possible.

Furthermore, by making the shape of the contact material for water treatment (formed body) a Raschig ring shape of a hollow cylinder,
Even if the microorganisms fixed on the surface of the contact material are enlarged, clogging hardly occurs and the operation can be continued for a long time. (2) A spiral shaped article having a metal wire as an axis: According to the present invention, the shape of the contact material for water treatment (molded article) is a spiral shaped article having a metal wire as an axis. This makes it possible to easily remove sludge formed by the enlargement of the microbial membrane on the surface of the contact material, and to provide a contact material that facilitates maintenance of the equipment.

That is, when an aeration type water treatment apparatus is used, both ends of a spiral contact member having a metal wire as a shaft core are fixed to the apparatus. According to the above-described method, the spiral-shaped contact material having a metal wire as an axis automatically expands and contracts due to spring elasticity, and the sludge adhering to the surface of the contact material is easily peeled off, and maintenance of the water treatment apparatus is performed. Becomes easier.

When a water treatment device other than the aeration method is used, a vibration imparting device is additionally provided so that a spiral contact member having a metal wire as a shaft core can be expanded and contracted to obtain water in the same manner as described above. Maintenance of the processing apparatus becomes easy. (3) A molded body obtained by rounding a string-shaped molded body and having a spherical outline: a molding having a spherical outline formed by rolling a string-shaped molded body and having a space in the molded body that serves as a flow path for water. By using the body as a contact material for water treatment, even if the microorganisms fixed on the surface of the contact material are enlarged, clogging hardly occurs and the operation can be continued for a long time.

[3] Preferred embodiments of the present invention (first invention): (1) Organic resin: In the present invention and each preferred embodiment of the present invention, the type of the above-mentioned organic resin is not particularly limited. However, the organic resin is preferably a thermoplastic resin. This is because the following effects can be obtained by using a thermoplastic resin as the organic resin.

Increase in microorganism retention: contact material (molded product)
The resin softens and melts during heating and molding in the manufacturing process,
As described above, the foaming action due to the rapid evaporation of the moisture in the hygroscopic powder particles previously absorbed and the springback of the fibers cause the cauliflower-like and porous complex solid to be formed on the surface of the contact material (molded body). A spatial structure is formed.

As a result, the surface area per unit volume of the contact material (compact) can be significantly increased, and the amount of microorganisms retained per unit volume of the contact material can be increased. Improvement of productivity of contact material for water treatment: When a thermoplastic resin is used, a heating / extrusion molding method can be used as a method of molding the contact material for water treatment (molded product), and the contact material is excellent in productivity. It can be manufactured by the following method.

Examples of the thermoplastic resin include polyolefins such as polypropylene (hereinafter also referred to as PP) and polyethylene (hereinafter also referred to as PE), polyvinyl chloride (vinyl chloride resin: also referred to as PVC hereinafter), and polystyrene (hereinafter referred to as PVC).
Examples thereof include styrene resins such as AS resin and ABS resin, and polyethylene terephthalate (hereinafter also referred to as PET).

Further, in the present invention, a thermoplastic resin produced using a metallocene catalyst such as an acid-modified polyolefin or polypropylene produced using a metallocene catalyst can be used. (2) Hygroscopic powder: As described above, according to the present invention, the water treatment contact material (molded article) is made to contain the hygroscopic powder so that the surface area associated with the formation of pore groups of the molded article is reduced. Increase in microbial retention per unit volume of contact material due to increase,
In addition, the mobility of the molded body in the water to be treated (fluidity in water) can be improved.

In the present invention and each preferred embodiment of the present invention, the type of the hygroscopic powder is not particularly limited, but it is preferable that the hygroscopic powder is a vegetable powder. . This is based on the following reasons. Immobilization of microorganisms and promotion of growth: Microorganisms are well compatible with plant powders such as wood flour, and inclusion of plant powders in organic resins promotes the fixation and growth of microorganisms.

Suitable Suitability for Drying (Evaporation of Water) and Moisture Absorption: As shown in the method for producing the contact material for water treatment of the present invention described later, a more preferable method for producing the contact material for water treatment of the present invention is as follows. Process. (a) Drying of hygroscopic powder → (b) Mixing of raw materials such as organic resin, dry hygroscopic powder and inorganic powder with density of 2.0 g / cm ³ or more → (c) Heating and extrusion (1st stage heating / extrusion molding) (pelletization) → (d) moisture absorption operation → (e) fiber adhesion →
(f) Heating / extrusion molding (second stage heating / extrusion molding) (porosity of molded body due to rapid evaporation of moisture in hygroscopic powder) That is, the water treatment contact material of the present invention is more suitable. In such a production method, the hygroscopic particles are dried in advance as necessary so that the hygroscopic particles can be uniformly dispersed in the molten resin, and the dried hygroscopic particles are used as a starting material. Then, the mixed raw materials are heated and extruded (first-stage heating and extruded) and pelletized.

Next, the obtained molded product (pellet) is subjected to a moisture absorbing operation to attach fibers, and then the final heating and extrusion molding (second stage heating and extrusion molding) is performed. Rapidly evaporates water in the body. For this reason, as the hygroscopic powder, the hygroscopic powder whose drying and moisture absorption proceeds easily and quickly in the cycle of drying → moisture absorption → drying (rapid evaporation of water) and whose amount of moisture absorption is within an appropriate range is used. Is desirable.

The vegetable powder has the above-mentioned suitability, and in the present invention, the vegetable powder is used as the moisture-absorbing powder in view of its suitability for drying (evaporation of water) and moisture absorption. Is preferred. Improved formability: For conventional plastic contact materials,
It has been difficult to obtain a contact material of any shape even by extrusion under heating conditions.

On the other hand, by incorporating vegetable powders such as wood flour into the organic resin which is the raw material of the molded article, the viscosity of the molten resin can be easily adjusted, and the contact material having an arbitrary shape can be used. It can be obtained stably. In the present invention, the plant-based granules are wood flour (mokufun), coconut shell (yashigara) powder, rice husk (rice husk) powder, straw (straw) powder, peanut shell. It is preferably one or more selected from powder and roasted peanut shell powder.

Further, in the present invention, it is particularly preferable that the vegetable powder is wood flour. This is because wood flour has the excellent effect of the above-mentioned plant-based granules, and it is possible to manufacture the contact material for water treatment by a method that is inexpensive and economical.

The type of the wood flour is not particularly limited, but is preferably a pulverized waste of construction waste, a pulverized waste of forestry waste, a pulverized wood waste generated in the lumber industry, and a wood powder generated in the lumber industry. One or two or more selected from the following can be used. In the present invention, the content of the hygroscopic powdery granules in the above-mentioned molded product is determined based on 100 parts by mass of the organic resin.
It is preferably from 10 to 30 parts by mass.

When the content of the hygroscopic powder is less than 10 parts by mass, an increase in the amount of microorganisms retained per unit volume of the contact material due to an increase in the surface area due to the formation of the pore group of the molded article, and an increase in the molded article It is difficult to improve the mobility (water flowability) in the water to be treated. In addition, when a vegetable powder such as wood flour is used as the hygroscopic powder, when the content of the vegetable powder is less than 10 parts by mass, the above-mentioned increase in the microorganism holding amount, and It is difficult to improve the mobility in the water to be treated, and it is also desirable to improve the suitability of microorganisms, the promotion of growth, the suitability for drying (evaporation of water) and the absorption of moisture, and the improvement of moldability when using the above-mentioned plant granules. It is difficult to obtain the effect.

If the content of the hygroscopic powder is more than 30 parts by mass, the softening and the fluidity of the melt during heating and molding are reduced, making molding difficult. (3) Fiber: As described above, according to the present invention, by allowing the water treatment contact material (molded article) to contain the fiber,
Formation of a complex three-dimensional spatial structure on the surface of the molded body based on the springback (repulsion) effect of the fibers during heating and molding,
It is possible to increase the amount of microorganisms retained per unit volume of the contact material and to ensure the strength of the molded body.

In the present invention and each preferred embodiment of the present invention, the kind of the above-mentioned fiber is not particularly limited, but the above-mentioned fiber is preferably made of a synthetic fiber composed of an organic resin or a regenerated cellulose. And at least one selected from the group consisting of regenerated fibers, coconut shell fibers, peanut shell fibers, and roasted peanut shell fibers.

Further, as the chemical fiber composed of the above-mentioned organic resin, a fiber composed of a thermoplastic resin is preferable. This is because the use of each fiber described above facilitates heating and extrusion. Further, in the case of a fiber composed of a crystalline organic resin, the melting point of an organic fiber which is a base material of a contact material (molded body) is used as a synthetic fiber composed of an organic resin or a recycled fiber made of regenerated cellulose. It is preferable to use a synthetic fiber or a regenerated fiber composed of an organic resin higher than the melting point and the softening temperature of the resin. In the case of a fiber composed of an amorphous organic resin, the softening temperature of the fiber is a contact material (compact). It is preferable to use chemical fibers and regenerated fibers composed of an organic resin higher than the melting point and softening temperature of the organic resin as the base material.

This is because, by using the above-mentioned fibers, softening and melting of the fibers at the time of heating and extruding the resin to which the fibers are adhered are prevented, and the surface of the molded body based on the springback (repulsion) effect of the fibers is prevented. The formation of a complex cauliflower-like and porous three-dimensional structure is promoted,
This is because the effect of reinforcing the contact material (molded body) with the fiber is exhibited.

Further, in the present invention and each preferred embodiment of the present invention, it is particularly preferable that the above-mentioned fibers are acrylic fibers and / or nylon fibers from the viewpoint of melting point and softening temperature. The fiber content of the above-mentioned molded article is
Organic resin: The amount is preferably 1 to 10 parts by mass, more preferably 2 to 8 parts by mass with respect to 100 parts by mass.

When the content of the fiber is less than 1 part by mass, it is difficult to form a complicated three-dimensional space structure based on the above-described springback effect of the fiber and to secure the strength of the molded body.
On the other hand, when the fiber content exceeds 10 parts by mass, the above-mentioned effects (1) and (2) are practically saturated and are not economical. Further, when the content of fibers exceeds 10 parts by mass, the surface of the molded body is excessively rough and a large number of fibers are exposed on the surface of the molded body, and when the molded body is used in a fluidized-bed water treatment apparatus,
May cause problems in strength.

The fiber length and fiber diameter in the present invention can be arbitrarily determined according to the size and shape of the molded article of the present invention, and are not particularly limited. ~ 5.0mm, average fiber diameter 0.5 ~ 3.
It is preferably 0 denier. (4) Inorganic powder having a density of 2.0 g / cm ³ or more: As described above, according to the present invention, by including an inorganic powder having a density of 2.0 g / cm ³ or more in a molded article, The specific gravity of the contact material (compact) can be freely adjusted, and a contact material with excellent mobility (water flowability) in the water to be treated can be obtained in a fluidized-bed water treatment apparatus. The probability of contact with the device.

Further, by blending the inorganic powder with the organic resin which is inferior to water, the mobility of the contact material in the water to be treated (fluidity in water) is improved in view of the wettability of the contact material with water. And the contact probability between the contact material and the water to be treated can be further increased in the fluidized-bed water treatment apparatus. In the present invention, the density is 2.
The 0 g / cm ³ or more inorganic powder or granular material, more preferably a density 2.0 g / cm ³ or more, it is preferable to use a 5.0 g / cm ³ or less of the inorganic powder or granular material.

This is because when an inorganic powder having a density exceeding 5.0 g / cm ³ is used, the specific gravity of the contact material becomes excessive, and conversely, the mobility (water flowability) of the contact material in the water to be treated is poor. This is because In each of the preferred embodiments of the present invention and the present invention, the density is 2.0 g / cm ³ or more, more preferably the density is 2.0 g / cm ³ or more, and the type of inorganic powder granules of 5.0 g / cm ³ or less is particularly Although not limited, it is preferable that the inorganic powder is an alkaline earth metal carbonate and / or talc.

This is because, as described above, the density is 2.0 g / cm ³
Or more, more preferably density of 2.0 g / cm ³ or more, 5.0 g / cm ³ or less of the inorganic powder or granular material as a calcium carbonate (density: 2.6 to
3.0 g / cm ³ before and after), magnesium carbonate (density: 3.0 g / cm ³ before and after), dolomite (Density: 2.8 ~3.1g / cm ³ before and after) an alkaline earth metal carbonates, such as and / or talc (density: By mixing 2.8 g / cm ³ ), the following effects can be further obtained in addition to the effect of increasing the contact probability between the contact material and the water to be treated.

Improvement of strength of contact material: The above-mentioned carbonate and talc have excellent compatibility with an organic resin as a base material (matrix), and can provide a strong contact material. Improvement of formability: Molding under heating conditions (: Heating / molding)
The fluidity of the melt at that time can be adjusted, and a contact material of any shape can be stably obtained.

Further, in the present invention and each of the preferred embodiments of the present invention, the above-mentioned inorganic powder having a density of 2.0 g / cm ³ or more, more preferably a density of 2.0 g / cm ³ or more and 5.0 g / cm ³ or less. It is particularly preferable to use calcium carbonate as a body.
This is because, by using calcium carbonate as the inorganic powder, the above-mentioned effects (1) to (5) can be obtained, the solubility of calcium carbonate in water is low, and the calcium carbonate can be held in the contact material for a long time. is there.

In the present invention and each preferred embodiment of the present invention, the above-mentioned inorganic powder having a density of 2.0 g / cm ³ or more, more preferably a density of 2.0 g / cm ³ or more and 5.0 g / cm ³ or less, is used. The total content of the organic resin is 5 to 100 parts by mass.
It is preferably 15 parts by mass. When the total amount is less than 5 parts by mass, it is difficult to obtain the effect of improving the mobility (in-water fluidity) of the contact material in the water to be treated by adjusting the specific gravity of the contact material (molded body).

In the case of using a carbonate of alkaline earth metal such as calcium carbonate and / or talc as the above-mentioned inorganic powder, if the total amount thereof is less than 5 parts by mass, the strength of the above-mentioned contact material is reduced. It is difficult to obtain the effects of improvement in moldability and moldability. Further, when the total amount exceeds 15 parts by mass, softening during heating and molding,
The fluidity of the melt decreases, forming becomes difficult, and the specific gravity of the contact material becomes excessively large. When the contact material is used in a fluidized-bed water treatment device, the mobility in the water to be treated (the fluidity in water ) Is reduced, and the contact probability between the contact material and the water to be treated is reduced.

(5) Quartz porphyry: As described above, according to the present invention, the inclusion of quartz porphyry in the molded body further increases the amount of microorganisms retained and the probability of contact between the contact material and the water to be treated. Can be further increased. In the present invention and each preferred embodiment of the present invention, the content of quartz porphyry in the contact material (molded body) is preferably 1 to 10 parts by mass with respect to 100 parts by mass of the organic resin.

When the content of the quartz porphyry is less than 1 part by mass, it is difficult to further increase the microorganism holding amount of the contact material and further increase the contact probability between the contact material and the water to be treated. If the content of the quartz porphyry exceeds 10 parts by mass, softening during heating and molding, the fluidity of the melt decreases, molding becomes difficult, and the specific gravity of the contact material becomes excessively large, When the contact material is used in a fluidized bed water treatment apparatus, mobility in the water to be treated is reduced, and the contact probability between the contact material and the water to be treated is reduced.

(6) Petiole and / or iron powder (metallic iron powder): As described above, according to the present invention, a petiole and / or iron powder (metallic iron powder) is contained in a molded product. In addition, phosphorus in the water to be treated can be removed. In the present invention and each preferred embodiment of the present invention, the stem and / or iron powder (metallic iron powder) of the contact material (molded body) described above.
Is preferably 5 to 15 parts by mass with respect to 100 parts by mass of the organic resin.

When the total amount is less than 5 parts by mass, the effect of removing phosphorus described above is reduced. The total amount is 15
If the amount exceeds the mass part, the softening during heating and molding, the fluidity of the melt decreases, the molding becomes difficult, and the specific gravity of the contact material (compact) becomes excessively large. When used in the water treatment apparatus, the mobility in the water to be treated decreases, and the contact probability between the contact material and the water to be treated decreases.

Next, a preferred method for producing the contact material for water treatment of the present invention will be described. [II] Method for producing contact material for water treatment of the present invention: The method for producing the contact material for water treatment of the present invention is not particularly limited, but the following production method (second invention, 3
Is particularly preferred.

That is, the second invention provides an organic resin powder, a hygroscopic powder and a density of 2.0 g / cm ³ or more, more preferably a density of 2.0 g / cm ³ or more and 5.0 g / cm ³ or less. Extrusion molding of the inorganic powder, or a mixture further containing quartz porphyry, under heating conditions, and after the obtained molded product was allowed to absorb moisture,
This is a method for producing a contact material for water treatment, in which fibers are attached to the moisture-absorbing molded article using an oily binder, and the obtained fiber-adhered molded article is extruded under heating conditions.

Further, the third invention is characterized in that the organic resin particles, the hygroscopic particles and the density are 2.0 g / cm ³ or more, more preferably the density is 2.0 g / cm ³ or more and 5.0 g / cm ³ or less. Extrusion molding of the inorganic powder granules and the mixture containing red iron oxide and / or iron powder or quartz porphyry is carried out under heating conditions, and the obtained molded product is subjected to moisture absorption. This is a method for producing a contact material for water treatment, in which fibers are adhered using the method, and the obtained fiber-adhered molded product is extruded under heating conditions.

FIG. 1 shows an example of a method for producing a contact material for water treatment of the present invention (second invention) by a process chart. FIG.
In the method for producing a contact material for water treatment according to the second aspect of the present invention, first, an organic resin powder, preferably a hygroscopic powder which is a plant powder such as wood powder, and an alkali powder such as calcium carbonate are preferably used. density is a carbonate and / or talc earth metal is 2.0 g / cm ³ or more, more preferably density of 2.0 g / cm ³ or more, were mixed 5.0 g / cm ³ or less of the inorganic powder and granular material, obtained The mixture was extruded under heating conditions (hereinafter referred to as
First stage heating / extrusion molding).

In the present invention, when using vegetable powders such as wood flour, for example, the hygroscopic powders are dried beforehand so that the hygroscopic powders can be uniformly dispersed in the molten resin. It is preferable to use them. That is, a more preferable manufacturing method of the contact material for water treatment of the present invention comprises the following basic steps.

(A) Drying of the hygroscopic powder → (b) Organic resin,
Dry hygroscopic granules and inorganic granules (density ≥ 2.0 g / c
Mixing of raw materials such as m ³ ] → (c) Heating / extrusion molding (first stage heating / extrusion molding) (pelletization) → (d) Hygroscopic operation of molded product → (e) Fiber adhesion → (f) Heating / Extrusion molding (second stage heating / extrusion molding) (porosity of molded body due to rapid evaporation of moisture in hygroscopic powder) The moisture absorption operation of the molded product includes the above-mentioned first stage heating / extrusion molding. It is not particularly limited as long as it is a method capable of absorbing moisture to the dehydrated hygroscopic powder,
A method of spraying water on the molded product can be used.

The amount of water to be added is preferably 0.1 to 10%, more preferably 0.5 to 5%. Next, fibers are adhered to the obtained moisture-absorbing molded product using an oil-based binder, and the obtained fiber-adhered molded product is extruded under heating conditions (hereinafter, referred to as second-stage heating and heating).
Extrusion molding).

According to the present invention, immediately after the extrusion at the time of the second-stage heating / extrusion molding, the moisture in the hygroscopic powder granules trapped in the molded product in the extruder is instantaneously evaporated, Acting as a foaming agent, a large number of pores (pore group) are formed in the molded article, and the surface of the molded article becomes cauliflower-like due to softening and springback (repulsion) effects of the fibers in the molten resin.

That is, by the action of moisture and fibers in the hygroscopic powder of the above-mentioned hygroscopic molded product, the second-stage heating and
Immediately after extrusion at the time of extrusion molding, a molded article having a cauliflower-like surface and a porous irregular three-dimensional void structure is obtained. Next, FIG. 2 shows an example of a more preferable method for producing a contact material for water treatment in the method for producing a contact material for water treatment of the second invention.

The method for producing a contact material for water treatment shown in FIG. 2 is a method for producing a contact material for water treatment in which quartz porphyry is further blended as a raw material in the production method shown in FIG. According to the method for producing a contact material for water treatment of FIG. 2, the same operation as the method for producing a contact material for water treatment shown in FIG. 1 described above allows the formation of a porous irregular three-dimensional void structure having a cauliflower-like surface. It is possible to provide a contact material for water treatment capable of obtaining a molded article having a sufficient amount of microorganisms per unit volume of the contact material, and improving the effect of removing soluble organic substances in the water to be treated. .

Further, according to the method for manufacturing a contact material for water treatment shown in FIG. 2, a compact containing quartz porphyry can be obtained as the contact material for water treatment of the first aspect of the present invention. Effect of activating and multiplying microorganisms fixed on the contact material, increasing the amount of microorganisms retained by the contact material, and improving the mobility of the contact material in the water to be treated (water flowability). Obtainable.

Next, FIG. 3 shows an example of a method for producing a contact material for water treatment of the third invention. The method for manufacturing a contact material for water treatment in FIG. 3 is a method for producing a contact material for water treatment in which a red iron oxide and / or iron powder is further added as a raw material in the above-described method for manufacturing in FIG. According to the method for manufacturing a contact material for water treatment of FIG. 3, the same effect as the method for producing a contact material for water treatment shown in FIG. A molded article having
Ensuring a sufficient amount of microorganisms per unit volume of contact material,
It is possible to provide a contact material for water treatment capable of improving the effect of removing soluble organic substances in the water to be treated.

Further, according to the method for manufacturing a contact material for water treatment shown in FIG. 3, the contact material (formed body) for water treatment according to the preferred embodiment of the first aspect of the present invention contains a stem and / or iron powder. The contact material for water treatment is obtained, and the effect of adding the above-described red iron oxide and iron powder, that is, the effect of removing phosphorus from the water to be treated can be obtained. Next, FIG. 4 shows an example of a more preferable method for producing a contact material for water treatment in the method for producing a contact material for water treatment of the third invention.

The method for producing a contact material for water treatment in FIG. 4 is a method for producing a contact material for water treatment in which quartz porphyry is further blended as a raw material in the production method in FIG. According to the method for producing a contact material for water treatment of FIG. 4, the same operation as the method for producing a contact material for water treatment shown in FIG. It is possible to provide a contact material for water treatment capable of obtaining a molded article having a sufficient amount of microorganisms per unit volume of the contact material, and improving the effect of removing soluble organic substances in the water to be treated. .

Further, according to the method for manufacturing a contact material for water treatment shown in FIG. 4, the porphyry, peduncle and / or porphyry which is the contact material (molded body) for water treatment according to the preferred embodiment of the first aspect described above. A water treatment contact material containing iron powder is obtained, and the effect of adding the quartz porphyry described above, that is, the effect of activating and growing microorganisms fixed to the contact material and increasing the amount of microorganisms retained in the contact material, In addition to the effect of improving the mobility (water flowability) of the contact material in the water to be treated, the effect of adding the above-described red iron oxide and iron powder, ie, the effect of removing phosphorus from the water to be treated, can be obtained.

Further, in the method for producing a contact material for water treatment of the present invention (the second invention and the third invention), the method for producing the contact material for water treatment according to the preferred embodiments of the first invention has the following features.
The organic resin of the organic resin powder or granular material, hygroscopic powder or granular material, fibers and density 2.0 g / cm ³ or more, more preferably density 2.
As the inorganic powder of 0 g / cm ³ or more and 5.0 g / cm ³ or less, the organic resin, the hygroscopic powder, the fiber, and the inorganic powder described in each of the preferred embodiments of the first invention are used. Is preferred.

Further, the present invention (second invention, third invention)
In the above, the oily binder is preferably a vegetable oil and / or a mineral oil. This is because vegetable oils and / or mineral oils have low viscosity as a binder, are easy to handle, and have excellent adhesion of fibers to the molded product after the first-stage heating and extrusion molding.

Further, the present invention (second invention, third invention)
It is particularly preferable to use vegetable oil as the above-mentioned oily binder. This is because the use of the obtained molded body as a carrier for immobilizing microorganisms for water treatment promotes immobilization and growth of microorganisms due to the presence of vegetable oil. Further, the present invention described above (second invention, third invention)
The blending amounts of the hygroscopic powder, fiber, inorganic powder, quartz porphyry, red iron oxide and / or iron powder in each preferred embodiment of the present invention are described in the above-mentioned preferred embodiments of the first invention. For the same reason as described above, the following compounding amount is preferable.

That is, the compounding amount of the hygroscopic powder in the present invention is 10 to 30 parts by mass per 100 parts by mass of the organic resin powder.
It is preferably in parts by mass. In addition, the amount of fiber
Organic resin powder: preferably from 1 to 10 parts by mass, more preferably from 2 to 8 parts by mass, per 100 parts by mass. The amount of the inorganic powder having a density of 2.0 g / cm ³ or more, and more preferably a density of 2.0 g / cm ³ or more and 5.0 g / cm ³ or less, is based on 100 parts by mass of the organic resin powder: 5
It is preferably 15 parts by mass.

It is preferable that the mixing amount of the quartz porphyry is 1 to 10 parts by mass with respect to 100 parts by mass of the organic resin particles. Further, the blending amount of the petiole and / or the iron powder is preferably 5 to 15 parts by mass with respect to 100 parts by mass of the organic resin particles in total. The amount of the oily binder is preferably 1 to 15 parts by mass with respect to 100 parts by mass of the organic resin powder.

When the amount of the oil-based binder is less than 1 part by mass, it is difficult to attach the fibers to the moisture-absorbing molded product. Conversely, when the amount exceeds 15 parts by mass, the fibers adhere to the moisture-absorbing molded product. This is because the effect is practically saturated, and the fibers flow out from the surface of the moisture-absorbing molded article accompanying the oil-based binder, making it difficult to adhere a predetermined amount of fibers.

In the method for producing a contact material for water treatment of the present invention, the first shape of the die (die) on the exit side of the extruder during the second-stage heating / extrusion molding is selected. A molded article having a predetermined shape such as a Raschig ring shape of a hollow cylinder according to each preferred embodiment of the present invention can be obtained. Further, as exemplified in FIG. 5, the molten resin extruded from the die (die) 2 on the exit side of the extruder during the second stage heating / extrusion molding together with the metal wire 6 supplied on the exit side of the extruder. Taking over,
The rod-shaped continuous formed body 7 is wound around a cylindrical rotary drum 8 and cooled, thereby forming a spiral-shaped water treatment contact having a metal wire as a shaft core, which is a preferred embodiment of the first invention. A material (formed body) 9 can be obtained.

The type of the above-mentioned metal wire is not particularly limited as long as it is a metal wire having elasticity, but it is preferable to use a stainless steel wire from the viewpoint of corrosion resistance. Further, in the present invention, the molten resin in a string shape extruded from the die (die) on the exit side of the extruder during the second-stage heating / extrusion molding is transferred to a storage container (jig) having a spherical outer shape. ) And by blowing air for cooling, it is possible to obtain a molded body having a space formed as a water flow path in the molded body having a spherical shape formed by rounding the string-shaped molded body. it can.

Further, according to the above-described manufacturing method, a bonding portion is formed at the contact point of the cord-like molded body by mutual fusion on the cord-like molten resin surface, the contour is spherical, and water is contained in the molded body. It is possible to obtain a molded article having a space serving as a flow path and further having excellent shape retention. Next, FIG. 6 shows the particle structure of the contact material for water treatment (granular molded article having a Raschig ring shape of a hollow cylinder) of the present invention obtained by the production method of the second invention and the production process shown in FIG. An example of the surface structure is shown by a micrograph (a) and a schematic diagram (b) of the micrograph.

The starting material of the contact material for water treatment (formed body) shown in FIG.
PP), wood flour (dry powder of pulverized building waste (wood)) as a hygroscopic powder, and calcium carbonate as an inorganic powder having a density of 2.0 g / cm ³ or more. Acrylic fiber was used as the fiber, and vegetable oil was used as the oily binder.

In FIG. 6 (b), CC is calcium carbonate,
F is a fiber, M is a matrix (matrix) of an organic resin,
P indicates voids, and W indicates wood flour. FIG. 6 (b) shows the surface structure of the compact particles. Although not shown, the base material, wood flour, fiber, calcium carbonate or further voids are present in the depth direction of the voids P.

Since a large amount of calcium carbonate is present in the base material in the form of fine particles, only a part thereof is shown in FIG. 6 (b). As shown in FIG. 6, the contact material for water treatment (molded body) of the present invention is a molded body made of an organic resin such as a thermoplastic resin as a base material. This is a molded article containing an inorganic powdery substance having a relatively large density such as calcium, and a molded article having a cauliflower-like surface and a porous irregular three-dimensional void structure.

As described above, in the method for producing a contact material for water treatment of the present invention, the organic resin particles, the hygroscopic particles and the density are 2.0 g / cm ³ or more, more preferably the density is 2.0 g / cm ³ or more.
2.0 g / cm ³ or more, 5.0 g / cm ³ or less of the inorganic powder or granular material, or even quartz porphyry, rouge, a mixture containing iron powder, heating conditions, extrusion (first stage heating and extrusion ), Then
The obtained molded product is absorbed by a moisture absorbing operation, fibers are attached to the obtained moisture-absorbed molded product using an oily binder, and the obtained fiber-adhered molded product is extruded under heating conditions (second stage heating / extrusion). Molding) to produce a water treatment contact material (molded body).

As a result, according to the method for producing a contact material for water treatment of the present invention, due to the above-described action, as shown in FIG. 6, the surface has a porous irregular three-dimensional void structure having a cauliflower shape. A contact material (molded body) for water treatment is obtained,
Ensuring a sufficient amount of microorganisms per unit volume of contact material,
It has become possible to provide a contact material for water treatment capable of improving the effect of removing soluble organic matter, furthermore, N compounds and P compounds in the water to be treated.

[0126]

EXAMPLES The present invention will be described below more specifically based on examples. (Example 1) The contact material for water treatment of the present invention was experimentally produced by using the method for producing a contact material for water treatment of the present invention shown in FIG. 1 described above.

The starting material of the contact material for water treatment (molded body) is
Polypropylene (: PP) powder (pellet) as organic resin powder, wood powder (dry powder of pulverized building waste (wood)) as hygroscopic powder, inorganic powder with a density of 2.0 g / cm ³ or more Calcium carbonate powder was used as granules. Acrylic fiber (average fiber length: 2.5 mm, average fiber diameter: 1.2 denier) was used as the fiber, and vegetable oil was used as the oily binder.

That is, in the method for producing the contact material for water treatment of the present invention shown in FIG. 1, first, the PP powder, the dry wood powder and the calcium carbonate powder are mixed, and the resulting mixture is extruded under heating conditions. Molding (1st stage heating and extrusion molding). Next, water was sprayed on the obtained molded product (pellet) by spraying to make the molded product absorb moisture.

The amount of water added was adjusted such that the water content of the molded product was 4%. Next, acrylic fibers were made to adhere to the obtained moisture-absorbing molded article using vegetable oil, and the obtained fiber-adhered molded article was extruded under heating conditions (: second-stage heating / extrusion molding). In the extruder at the time of the second-stage heating / extrusion molding, a die capable of obtaining a hollow cylindrical molded body is used. After cooling the extruded molded body, the extruded molded body is cut into a predetermined length. A Raschig-shaped molded product (particle) was obtained.

The particle structure of the obtained molded product is as shown in the micrograph (a) of FIG. 6 and the schematic three-dimensional view (b) of the micrograph, in which the surface has a cauliflower-like porous irregular three-dimensional void structure. Was the particle structure. Next, the obtained contact material for water treatment was examined for its ability to adhere and fix microorganisms by the following test method.

[Test Method of Microorganism Adhesion Fixing Performance:] Immersion in Contaminated Water: Immersion Location: Irrigation Canal
Inflow, gentle flow, normal depth about 10-20
cm) Method for measuring the number of bacteria: Culture medium used and culture conditions: Aerobic bacteria: SCD agar medium (Eiken Chemical), 32 ° C x 72 hours Anaerobic culture detection bacteria^*: ABCM agar medium (Eiken Chemical)
Qi condition (H_Two: 5%, CO _Two: 5%, N_Two: Base), 37 ℃
120 hours *: Some aerobic bacteria grow under the above conditions.
It was described as anaerobic culture detection bacteria.

Measurement method of the number of bacteria: The sample was powdered with a crusher, shaken together with sterilized water, and the number of bacteria in the water was measured by a plate smear culture method. Table 1 shows the test results obtained. (Comparative Example 1) A Raschig ring shaped molded article (particle) of a hollow cylinder made of polypropylene was used as a contact material for water treatment.
Microorganism adhesion fixing performance was examined by the same test method as in Example 1 described above.

Table 1 shows the test results obtained. As shown in Table 1, the contact material for water treatment of the present invention (Example 1)
Showed that the aerobic microorganism (aerobic bacterium) was attached and fixed to the conventional contact material for water treatment (Comparative Example 1) at an early stage, and was found to have excellent growth performance.

[0134]

[Table 1]

(Example 2) The contact material for water treatment of the present invention used in Example 1 (a hollow cylindrical Raschig ring shaped molded product)
The sewage treatment was performed using both the contacting material for water treatment, which was a molded body having a spherical contour, manufactured by the same method as in Example 1 except that the molding method during the second-stage heating / extrusion molding was changed. The test was performed.

The above-mentioned molded article having a spherical outline is obtained by mixing a string-shaped molten resin extruded from a die (die) on the exit side of the extruder at the time of the second-stage heating / extrusion molding with a spherical external form. It was stored in a net-made storage container (jig), and was manufactured by blowing cooling air. The obtained molded article is a molded article obtained by rounding a string-shaped molded article and having a spherical outline, and has a space in the molded article that serves as a water flow path.

Further, the above-mentioned molded body is a molded body in which a joint is formed at a contact point of the cord-like molded body by mutual fusion on the surface of the cord-like molten resin, and the surface structure is as described above. The surface shown in the micrograph (a) of FIG. 6 and the schematic diagram (b) of the micrograph had a surface structure having a cauliflower-like porous irregular three-dimensional void structure. In FIG.
1 shows a water treatment test apparatus used in this example.

In FIG. 7, reference numeral 20 denotes sewage (water to be treated), 21 denotes water to be treated, 22 denotes treated water, 23 denotes an aerobic tank (aeration tank, fluidized bed system), and 24a denotes a first anaerobic tank ( Fixed floor method),
24b is a second anaerobic tank (fixed bed type), 25 is a sedimentation tank, 26 is a Raschig ring-shaped contact material for water treatment, 27a and 27b are packed layers filled with a water treatment contact material having a spherical outline, and 28 is a porous layer. Board ,
29 is an aeration pipe (aeration pipe), 30, 31 is air, 32 is sludge return pipe, 33 is treated water circulation pipe, 34a, 34b, 34c are pumps,
35 is a compressor, 36 is recovered sludge, 37a and 37b are valves,
f indicates the flow direction of the water to be treated.

In FIG. 7, reference numeral 23 denotes a fluidized-bed aerobic tank (aeration tank) in which the above-mentioned hollow cylindrical Raschig-shaped compact (particles) is fluidized in a floating manner.
b is a fixed-bed anaerobic tank filled with a compact having a space which becomes a flow path of water in the compact having the spherical outline described above. That is, in the present embodiment, seed sludge is put into an aerobic tank (aeration tank, fluidized bed system) 23 in which a water treatment contact material, which is a Raschig ring-shaped formed body of a hollow cylinder, is fluidized, and sewage (water) Treated water) 20 is treated in an aerobic tank 23 under aeration conditions, and then a first anaerobic tank 24a and a second anaerobic tank 24 filled with a water treatment contact material having a spherical contour.
Water was passed through 24b, treated under anaerobic conditions, and the generated sludge was separated and removed in the sedimentation tank 25.

After the start of water passage, a test was conducted for three months, and BOD, COD, ammonia nitrogen (: NH ₄ -N), nitrate nitrogen and nitrite nitrogen (NO _X -N), phosphorus ( P) Each concentration was measured periodically. Table 2 shows Example 2
Table 3 shows the production conditions of the contact material for water treatment used in Table 2, and Table 3 shows the obtained measurement results as average values during the test period.

(Examples 3 to 8) The Raschig ring-shaped molded product of the hollow cylinder of the present invention was produced in the same manner as in Examples 1 and 2 described above, under the conditions for producing the contact material for water treatment shown in Table 2 and below. In addition, a contact material for water treatment, which was a molded body having a spherical outline, was prototyped. [Manufacturing conditions of contact material for water treatment:] Manufacturing process: FIGS. 1 to 4 Raw materials (both Raschig-ring shaped and shaped spherical shaped bodies are common): Organic resin powder (pellet): polypropylene (: P
P), polyethylene (: PE), polystyrene (: PS) Hygroscopic powder: Dry powder of crushed building waste (wood), dry powder of crushed forestry wood (wood), crushed rice hull (rice husk) Dry powder, dry powder of crushed rice straw (straw) Inorganic powder with a density of 2.0 g / cm ³ or more: CaCO ₃ , dolomite, talc Quartz porphyry (powder) Petal (powder), iron powder ( Fiber: Acrylic fiber (average fiber length: 2.5 mm, average fiber diameter: 1.2 denier), nylon fiber (average fiber length: 2.8 m)
m, average fiber diameter: 1.2 denier) Oil-based binder: vegetable oil, mineral oil The surface structures of the obtained Raschig-ring shaped body and the shaped body having a spherical outline are all the micrographs of FIG. 6 described above.
The surface similar to the particle structure (surface structure) shown in (a) and the schematic diagram (b) of the micrograph was a surface structure having a cauliflower-like porous irregular three-dimensional void structure.

Next, using each of the obtained contact materials for water treatment,
A sewage treatment test was performed in the same manner as in Example 2 described above. Table 2 shows the manufacturing conditions of the contact material for water treatment used in each example, and Table 3 shows the test results obtained. (Comparative Example 2) A sewage treatment test was conducted in the same manner as in Example 2 described above, using a molded article made of expanded polypropylene (a molded article having a Raschig ring shape of a hollow cylinder) as a contact material for water treatment.

In Comparative Example 2, in the aerobic tank (aeration tank, fluidized bed system) 23, the above-mentioned molded article made of expanded polypropylene was used as the contact material for water treatment, and the flow condition of the contact material for water treatment was used. The test was performed below. In addition, the first anaerobic tank (fixed bed type) 24a and the second anaerobic tank (fixed bed type) 24a
In each of b, the molded article made of the expanded polypropylene was filled as a contact material for water treatment, and a test was conducted by a fixed bed method.

Table 3 shows the test results obtained. As shown in Table 3, the contact material for water treatment of the present invention (Examples 2 to 2)
In Example 8), the BOD removal rate, COD removal rate, ammonia nitrogen (NH ₄ -N) removal rate, nitrate nitrogen removal ratio of nitrate nitrogen (NO _X -N), more phosphorus (P) (T-
It was found that the removal rate of P) was excellent.

[0145]

[Table 2]

[0146]

[Table 3]

Example 9 Using the method for producing the contact material for water treatment of the present invention shown in FIG. 1 and the extruder shown in FIG. 5 (the extruder in the second stage heating / extrusion molding). A contact material for water treatment of the present invention, which is a spiral shaped molded body having a metal wire as a shaft core, was prototyped. The starting materials of the contact material for water treatment (molded product) are polypropylene (: PP) as organic resin particles, dry powder of pulverized building waste (wood) as hygroscopic particles, density 2.0 g Calcium carbonate powder was used as an inorganic powder having a particle size of / cm ³ or more.

Acrylic fiber (average fiber length: 2.5 mm, average fiber diameter: 1.2 denier) was used as the fiber, and vegetable oil was used as the oily binder. Stainless steel wire was used as the metal wire. Next, a sewage treatment test was performed using both the spiral shaped water treatment contact material obtained above and the water treatment contact material having a spherical shape having the same contour as that used in Example 2 described above. went.

FIG. 8 shows a water treatment test apparatus used in this embodiment. In FIG. 8, reference numerals 27a and 27b denote packed layers filled with a water treatment contact material having a spherical outline, 40 denotes a spiral water treatment contact material, and 41a and 41b denote spiral water treatment contact materials. A support member for supporting and fixing the portion is shown, and other reference numerals indicate the same contents as those in FIG.

That is, in this embodiment, the seed sludge is charged into the aerobic tank (aeration tank) 23, which is filled with the spiral-shaped water treatment contact material 40 and is changed to the fixed bed type, and the sewage (to be treated) (Water) 20 is treated in an aerobic tank 23 under aeration conditions, and then water is passed through a first anaerobic tank (fixed-bed method) 24a and a second anaerobic tank (fixed-bed method) 24b filled with a compact having a spherical outline. Then, the mixture was treated under anaerobic conditions, and the generated sludge was separated and removed in the sedimentation tank 25.

At the time of the above test, it was observed that the contact member 40 for water treatment in a spiral shape was expanded and contracted by the aeration and the spring elasticity of the contact member 40 for water treatment. After the start of water flow, a test is conducted for three months, and the BOD of treated water,
The concentrations of COD, ammonia nitrogen (: NH ₄ -N), nitrate nitrogen, nitrite nitrogen (NO _X -N), and phosphorus (P) were periodically measured.

Table 4 shows the conditions for producing the contact material for water treatment used in this example, and Table 5 shows the test results obtained. Table 5
As shown in the figure, the contact material for water treatment of the present invention has a BOD removal rate, COD removal rate, ammonia nitrogen (NH ₄
-N) removal rate, nitrate nitrogen and nitrite nitrogen (NO _X-
It was found that the removal rate of N) was excellent.

Further, the sludge that grows on the surface of the spiral-shaped water treatment contact material 40 in the aerobic tank 23 is peeled off by the expansion and contraction of the spiral-shaped water treatment contact material 40 due to the aeration. It was found that the maintenance of the water treatment device was facilitated by using the contact material.

[0154]

[Table 4]

[0155]

[Table 5]

[0156]

According to the present invention, a contact material for water treatment capable of securing a sufficient amount of microorganisms per unit volume of the contact material and improving the effect of removing soluble organic substances in the water to be treated, and It has become possible to provide a contact material for water treatment which is excellent in the removal rate of P compounds and N compounds in the water to be treated, and a method for producing the contact material for water treatment, together with the removal of soluble organic substances.

Further, according to the present invention, it is easy to prevent clogging of the contact material in the biofilm method or to remove sludge formed by the enlargement of the microbial membrane on the surface of the contact material.
It has become possible to provide a contact material that facilitates equipment maintenance.

[Brief description of the drawings]

FIG. 1 is a process chart showing a method for producing a contact material for water treatment of the present invention.

FIG. 2 is a process chart showing a method for producing a contact material for water treatment of the present invention.

FIG. 3 is a process chart showing a method for producing a contact material for water treatment of the present invention.

FIG. 4 is a process chart showing a method for producing a contact material for water treatment of the present invention.

FIG. 5 is an explanatory view showing an extruder according to the present invention.

FIG. 6 is a micrograph (a) and a schematic diagram (b) showing an example of the particle structure (surface structure) of the contact material for water treatment of the present invention.

FIG. 7 is a longitudinal sectional view showing a water treatment test apparatus.

FIG. 8 is a longitudinal sectional view showing a water treatment test apparatus.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Extrusion molding machine 2 Die (die) 3 Hopper 4 Raw material 5 Reel for winding a metal wire 6 Metal wire 7 Rod-shaped continuous melted body 8 Rotary drum 9 Spiral shaped water treatment contact material (formed body) 10 Cooling zone (Water tank) 20 Sewage (treated water) 21 Treated water 22 Treated water 23 Aerobic tank (aeration tank, fluidized bed method) 24a First anaerobic tank (fixed bed method) 24b Second anaerobic tank (fixed bed method) 25 Sedimentation tank 26 Raschig ring contact material for water treatment 27a, 27b Packing layer filled with contact material for water treatment with spherical outline 28 Perforated plate 29 Aeration tube (aeration tube) 30, 31 Air 32 Sludge return piping 33 Treated water circulation piping 34a, 34b, 34c Pump 35 Compressor 36 Sludge (recovered sludge) 37a, 37b Valve 40 Spiral shaped water treatment contact material 41a, 41b Support material f Flow direction of water to be treated f ₁ Rotation direction of drum f ₂ Metal wire for water treatment in the moving direction f ₃ spiral contact member Drawing direction CC calcium carbonate F fiber M organic resin of the molded article) [base material (matrix)] P gap W wood flour

Continued on front page F term (reference) 4B033 NA02 NA11 NA12 NB02 NB14 NB22 NB34 NB43 NB60 NB61 NB64 NB66 NB67 NB68 NB69 ND04 ND11 4D003 AA01 AA14 AB02 BA01 BA03 CA07 CA08 EA01 EA08 EA15 EA17 EA18 EA17 EA18

Claims (16)

[Claims] 1. A molded article using an organic resin as a base material,
A contact material for water treatment, which is a molded body containing a hygroscopic powder, a fiber, and an inorganic powder having a density of 2.0 g / cm ³ or more. 2. The contact material for water treatment according to claim 1, wherein the hygroscopic powder is a vegetable powder. 3. The contact material for water treatment according to claim 1, wherein the hygroscopic powder is wood flour. 4. The water according to claim 1, wherein the inorganic powder having a density of 2.0 g / cm ³ or more is an alkaline earth metal carbonate and / or talc. Contact material for processing. 5. The contact material for water treatment according to claim 1, wherein said compact further contains quartz porphyry. 6. The contact material for water treatment according to claim 1, wherein the molded body further contains a petiole and / or iron powder. 7. The contact material for water treatment according to claim 1, wherein the molded body is a Raschig ring-shaped molded body having a hollow cylinder. 8. The contact material for water treatment according to claim 1, wherein the molded body is a spiral-shaped molded body having a metal wire as a shaft core. 9. The molded article is a molded article obtained by rounding a string-shaped molded article and having a spherical outline and having a space serving as a water flow path in the molded article. The contact material for water treatment according to claim 1. 10. The contact material for water treatment according to claim 1, wherein the molded body is a foam having an opening group on the surface of the molded body. 11. The contact material for water treatment according to claim 1, wherein the contact material for water treatment is a carrier for immobilizing microorganisms for water treatment. 12. A mixture containing an organic resin particle, a hygroscopic particle and an inorganic particle having a density of 2.0 g / cm ³ or more, or a quartz porphyry, is extruded under heating conditions to obtain a mixture. A water treatment contact material characterized in that after the obtained molded article is absorbed, fibers are adhered to the moisture-absorbed molded article using an oily binder, and the obtained fiber-adhered molded article is extruded under heating conditions. Manufacturing method. 13. An organic resin powder, a hygroscopic powder, an inorganic powder having a density of 2.0 g / cm ³ or more, and a petiole and / or
Alternatively, an iron powder, or a mixture containing quartz porphyry, is extruded under heating conditions, and after the obtained molded article is absorbed by moisture, a fiber is adhered to the moisture-absorbed molded article using an oily binder to obtain the obtained article. A method for producing a contact material for water treatment, comprising extruding a fiber-adhered molded product under heating conditions. 14. The method for producing a contact material for water treatment according to claim 12, wherein the hygroscopic powder is a vegetable powder. 15. The method for producing a contact material for water treatment according to claim 12, wherein the hygroscopic powder is wood flour. 16. The water according to claim 12, wherein the inorganic powder having a density of 2.0 g / cm ³ or more is a carbonate and / or talc of an alkaline earth metal. Manufacturing method of processing contact material.