KR20090107468A - A treatment apparatus of bankfiltered water by use of oxidation basin and bio activated carbon filter - Google Patents

Abstract

PURPOSE: A treatment apparatus for bank-filtered water using oxidation basin and activated carbon filter is provided to improve neighboring environment, and to reduce construction cost. CONSTITUTION: A treatment apparatus for bank-filtered water using an oxidation basin and an activated carbon filter comprises the followings: a collecting basin(10) collecting the bank-filtered water and transferring a purified water processing process; an aeration oxidation basin(30) oxidizing ion in the water and removing odor components and supplying the enough oxygen to raw water; an ozone oxidation basin(40) oxidizing the iron and manganese in the raw water; an ozone system(200) dissolving and supplying the ozone to the ozone oxidation basin; and a mechanical filter(50) removing suspended materials in the bank-filtered water.

Description

A treatment apparatus of bankfiltered water by use of oxidation basin and bio activated carbon filter}

The present invention relates to an apparatus for treating riverside filtration water using an oxidized paper and a biological activated carbon filter paper, and more specifically, an apparatus and a method for biologically removing iron and manganese from a pre-registered patent No. 0361655 (2002.11.06) water source. It is about improvement.

Riverside filtration is water that is present in a very clean underground aquifer due to the degradation of microorganisms for a long period of time as the river or surface water passes through the riverside aquifer.

Riverside filtrate is an excellent tap water material because of its extremely low content of organic contaminants and suspended solids.

Thus, at this point in time when pollution of rivers and surface waters is on the rise, riverbank filtrates are receiving great attention and expectation for most people who want good water.

However, riverbank filtrate is very clean water, but because it has been in contact with the soil for a long time, iron and manganese components in underground soil are often dissolved and dissolved, and iron and manganese, in addition to taste and smell, wash laundry red or black. Because of the dyeing effect, the tap water must remove these components below a certain level.

Iron and manganese can be removed from the riverside filtrate by injecting and oxidizing Kali permanganate, but this method generates a large amount of sludge, and trace impurities and secondary products in Kali permanganate may adversely affect the water quality. There is concern that it is perceived as unsuitable for the treatment of riverside filtration pursuing cleanliness.

Another method is a biological treatment method that removes iron and manganese by the action of microorganisms that do not affect the water quality. Almost this method is used in developed countries because of less sludge generation and good water quality. No. 0361655 (Nov. 06, 2002), Apparatus and Method for Biologically Removing Iron and Manganese from Water Sources, is a representative method for treating riverside filtrate of this method, which is the action of iron bacteria in sand filter paper to remove iron and manganese. It is to remove traces of residual organic matter, taste, etc. from activated carbon filter paper.

However, as described above, the riverside filtrate has a low concentration of suspended solids in many cases, so that iron and manganese are oxidized and removed from the bioactive carbon filter paper without installing sand filter paper, and at the same time, the suspended solids are completely removed. Many times you can.

In addition, the oxidation method in the oxidation paper is a lot of aeration paper using air, but if there is a fear of taste and smell in riverside filtration water and want to oxidize manganese quickly, ozone is used to rapidly oxidize part of manganese. The remaining manganese can be removed using iron bacteria in a sand filter paper or a bioactive carbon filter paper.

Ozone is widely used to remove taste, odor-causing substances and trace harmful substances in advanced treatment of waterworks, and is also used for oxidation of manganese.

However, in the case of manganese, the amount of oxidized in ozone oxidation is 20%, the rest should use the oxidation of iron bacteria.

Ozone is widely used because it does not form a special harmful compound after reaction, its reaction time is short, its decomposition ability is high, and it does not remain in water. However, ozone is itself toxic. In addition to feeling bad smell, headaches, long-term exposure is a threat to health, and in severe cases is also a difficult material to kill the surrounding plants.

In addition, ozone is relatively well soluble in water, but reacts sensitively to the pressure, temperature, and water quality of the water to be dissolved. The higher the water temperature, the lower the solubility.

In the past, many acid substrates generating fine bubbles were used as a method of dissolving ozone in water, but now ozone is generated by using pure oxygen or liquefied oxygen, and thus the ozone concentration in the generated ozonated air becomes high. There is a tendency to use the side stream method which has high dissolution rate of ozone and is easy to maintain.

However, the conventional side stream system composed of a pressurized pump, an injector, and an ozone dissolving tank has the advantages of being convenient as described above, but has a disadvantage in that a lot of power is required to dissolve ozone in water. There was a problem.

In addition, the existing ozone oxide paper has a large change in the overhead head of the ozone oxidation paper outlet at a change in the amount of raw water flow, and when a large amount of the exhaust ozone gas is compressed when the exhaust ozone gas in the space above the closed ozone contact tank is compressed. The discharge of the ozone remover is unstable, and in a severe case, the safety valve operates, causing the ozone gas to leak into the building or the atmosphere, threatening the health of the worker and causing death of surrounding plants.

Therefore, there is a need for an ozone system that can increase the ozone dissolution rate of ozone oxide paper and control the ozone amount constantly, and a new treatment device for riverside filtration that has a simple and low loss head and treatment process.

The present invention provides an apparatus for treating riverside filtration water, which oxidizes riverside filtration water transferred from a water well to oxidized paper or ozone oxidation paper, oxidizes and removes iron bacteria from biological activated carbon filter paper, and includes an effective ozone system and ozone oxide paper.

To this end, the present invention,

A water well 10 for collecting and collecting the riverside filtration water and transferring it to a water treatment process;

Abandoned oxidizing paper (30) for selectively applying to oxidize iron in riverside filtered water, to remove taste and odor, and to supply sufficient oxygen to raw water;

Ozone oxide paper 40 for selectively applying oxidizing iron and manganese in raw water by removing ozone and removing substances causing taste and smell;

An ozone system 200 for effectively supplying and dissolving ozone into an ozonation paper and dissolving ozone in a constant manner to efficiently treat ozone;

A mechanical filter (50) which is selectively applied to remove suspended matter in the riverside filtrate through the oxidation aeration tank or the ozone oxidation paper and to minimize the loss head;

A biological activated carbon filter paper 60 for removing traces of suspended solids, flavors, odorous substances and manganese contained in the raw water;

Disinfecting paper 70 for disinfecting the filtered water of the biological activated carbon filter paper to make tap water;

A water supply and drainage facility (80) passing through the disinfecting paper; And

It provides an apparatus for treating riverside filtration using oxidized paper and biological activated carbon filter paper, characterized in that it comprises an effluent treatment facility (90) for treating the washing drainage.

According to the water quality of the riverside filtration, the treatment process is selectively applied to the riverside filtration to treat the riverside filtration, the process is simple, and by using a mechanical filter with a very small loss head, the loss of the treatment process is minimized and consumed It saves power, reduces construction cost, reduces ozone usage by applying an efficient ozone system, and completes ozone treatment, thereby improving economic, peripheral and working environment, and improving water quality.

A raw water feed pump 11 is installed in the lower portion of the intake well 10 of the river filtration to collect and temporarily store the river filtration and install the raw water transfer pump 11 to install the raw water transfer pipe 12. Through the river filtration to the watering well (20).

The impingement well 20 is a structure having a distribution function for equally supplying the riverside filtrate to the water level stability and the next process.

The riverside filtered water that has passed through the impingement 20 is transferred to the abandoned oxidation paper 30 which is the next treatment process.

This abandoned oxidation paper 30) and the ozone oxidation paper 40 to be described later are selectively provided with each other or installed together depending on the water quality situation.

In the case of providing the abandoned oxidation paper 30, the ozone oxidation paper 40 is not provided, and in the case of installing the ozone oxidation paper 40, the aeration oxide paper 30 is not provided.

However, as will be described later, the abandoned oxidation paper 30 and the ozone oxidation paper 40 may be installed together for the purpose of reducing the amount of ozone used.

In the abandoned oxide paper 30, air is supplied to the riverside filtrate so that the DO (dissolved oxygen concentration) of the riverside filtrate is at least 5.0 mg / L or a saturation concentration, and the iron (Fe) in the riverside filtrate is iron oxide. It is oxidized and volatilized to remove some flavors and odors.

The aeration system for supplying air to the riverside filtrate is an aeration system for air supply by a diffuser and a blower, aeration device using an underwater aeration and blower, aeration device using a self-contained underwater aeration, a riverside by an upward spray nozzle or a downward spray nozzle It is possible to use an apparatus in which the filtered water is dispersed in the spray phase and brought into contact with air in the atmosphere to supply air.

When the abandoned paper 3 is not provided, the ozone paper 40 is provided.

In the ozone oxide paper 40, ozone (O ₃ ) gas generated from the ozone system 200 is supplied into the riverside filtrate to oxidize iron (Fe) to iron oxide and to oxidize manganese to manganese dioxide, and at the same time cause a taste and smell. Traces of organics are oxidized and removed.

Since the supply amount of ozone varies depending on the water quality, a pilot test should be performed to determine the supply amount and the capacity of the ozone system, but it is often injected in the range of 1.0 to 5.0 mg / L.

For reference, when the amount of oxygen or ozone gas required to oxidize iron and manganese is indicated, the iron oxidation of air is expressed by Equation 1, the iron oxidation of ozone is expressed by Equation 2, and the manganese oxidation of ozone is expressed by Equation 3.

Equation 1

Equation 2

Equation 3

From the above equations 1 to 3, the ratio of oxidant / Fe ²⁺ is 0.14 for oxidizing iron with oxygen in the air and 0.43 for ozone oxidation.

In the case of ozone oxidation of manganese, the ratio of oxidant / Mn ²⁺ is 0.57.

During ozone oxidation, iron reacts quickly, so iron in water first reacts with ozone to oxidize and then manganese oxidizes.

If manganese forms a manganese complex, it is not oxidized by ozone. In some cases, manganese should be biotreated with iron bacteria even after ozone oxidation for safety of treatment.

As can be seen from the above equation, in the case of iron oxidation, it is economical to oxidize using inexpensive air rather than expensive ozone.

Therefore, in the treatment of the riverside filtrate containing a lot of iron and a little manganese and organic matter is installed aeration paper (30), to oxidize iron first by air aeration, the next process ozone oxidation paper (40) using manganese by using ozone By oxidizing it, the capacity of the ozone system can be reduced, and the amount of expensive ozone gas is also reduced, which is more economical. Therefore, in this case, the abandoned oxidation paper 30 and the ozone oxidation paper 40 are provided together.

The ozone system 200 is composed of an ozone dissolving device for generating ozone gas and dissolving ozone in the riverside filtrate, and an exhaust ozone decomposing device for decomposing and removing waste ozone (residual ozone gas contained in the exhaust gas passing through the ozone oxide). .

An example of an ozone system is as follows (see Figs. 2 to 4).

2 illustrates an ozone system 200 that produces ozone gas using liquid oxygen as a raw material.

The liquid oxygen stored in the liquid oxygen storage tank 201 is transferred to the ozone generator 220a while being vaporized with ozone gas from the vaporizer 202, and the ozonized gas (10%) containing ozone gas of about 10% in the ozone generator (10). % O ₃ + 90% O ₂ ), which is sucked into the ejector 204 through the flow meter 205a and is fed with the riverside filtrate transferred from the ozone dissolved water pump 203 connected to the raw water pipe of the riverside filtrate. The mixture is mixed in a static line mixer 207 installed at the end and then transferred to the main dissolution pipe 208, where it is completely mixed with the riverside filtrate.

The ozone dissolution rate of such an ozone system reaches 95 to 98%.

The riverside filtrate, in which ozone is completely dissolved, flows from the lower end of the ozone oxide paper 40 and flows along a channel separated by one or more of the flow barrier walls 41, and iron, manganese, and trace organic matter in the riverside filtrate are dissolved in the riverside filtrate. Oxidizes, iron is insoluble iron hydroxide, part of manganese is converted to insoluble manganese dioxide, organic matter is oxidized to water and carbon dioxide, carbon dioxide is partially dissolved in water and the remainder is ozone The gas is exhausted to the outside of the ozone oxidation paper 40 together with the gas.

The ozone gas exhausted to the outside of the ozone oxide paper 40 is pressurized by the exhaust fan 212 through the ozone gas pipe 11 and transferred to the ozone destroyer 213, and pyrolysis or catalytic decomposition in the ozone destroyer 213. Alternatively, ozone gas is decomposed by the adsorption of activated carbon, converted into harmless oxygen gas, and discharged into the atmosphere.

The problem in the ozone gas treatment is that the amount of ozone gas rapidly increases or decreases due to a sudden change in the water level of the ozone oxide paper 40.

If the ozone gas increases rapidly, a part of the ozone gas is released into the atmosphere without causing decomposition, causing secondary pollution, unless the capacity of the ozone destroyer is very large.

The method of preventing a sudden change in the amount of ozone gas is described in detail in the patent application (0016716, 2009.02.17) of our company will be briefly described here.

On the bottom of the ozone oxide paper 40, a plurality of convex walls 41 are installed to be opposite to each other as shown in FIG. To the minimum length required.

In the ozone oxide paper where the height from the surface of the ozone oxide paper to the upper slab ceiling is H and is operated at a pressure of -50 mmAq, the surface change height Δh at which the ozone gas is not released into the atmosphere is calculated by the following equation.

Equation 4

Where H is the height (m) from the surface of the ozone oxide ground to the upper slab ceiling.

Λh: Height of change of overflow head due to change of raw water inflow (m).

In the case of the overflow weir as the full overflow weir, the length of the overflow weir satisfying the above condition is obtained from Equation 5 to Equation 7, and the length of the overflow weir is to be determined to be greater than or equal to this minimum length.

Equation 5

Equation 6

Equation 7

Where Λh is the change height (m) of the overflow head of the full-width weir due to the change of raw water inflow.

C: Flow coefficient of full width weir (usually 1.8)

h: Overflow head at 100% inflow (m).

L: Minimum required length of overflow weir (m)

x: ratio of variable flow rate to 100% inflow flow rate (x ≤ 1)

Q: 100% inflow rate (same as facility capacity) (㎥ / s)

If the overflow weir is composed of a right triangle weir, the minimum required length of the overflow weir is obtained as shown in Equation 8.

Equation 8

Where Λh is the change height of the head of the triangular weir by the change of raw water inflow (m).

C: Flow coefficient of triangular overflow weir (usually 1.45)

h: Overflow head at 100% inflow (m).

L: Minimum required length of triangular overflow weir (m)

x: ratio of variable flow rate to 100% inflow flow rate (x ≤ 1)

Q: 100% inflow rate (same as facility capacity) (㎥ / s)

N: triangular weir per 1 m of weir (usually 6)

When the fan is operated at a constant speed even in the ozone system configured as described above, since the amount of ozone gas changes due to the pressure change, the fan 212 is equipped with an ozone gas flow meter and an inverter (not shown) to maintain a constant air flow rate. Most preferably, automatic control operation is performed.

Another method of supplying ozone to ozone oxide paper 40 relates to an ozone system for supplying ozonation gas having a low ozone gas concentration of about 1 to 3% by using air as a raw material (see Fig. 3).

The air-based ozone system 200 includes an air compressor 201a, an air dryer 202b, an ozone generator 200a, a flow meter 205a, an ozonated gas transfer pipe 205, and a fine acid engine 230. The exhaust fan 212, the ozone destroyer 213, the overflow weir (42).

In the ozone system using air as a raw material, the ozone concentration in the ozonation gas is low at 1 to 3%. Thus, the ozonation gas is supplied through the fine diffuser 230 provided at equal intervals on the bottom of the ozonation paper 40. Thus, a method of dissolving ozone in the riverside filtrate by contacting the riverside filtrate with the rise of fine ozonation gas in water may be more effective than the side stream method.

In this case, the depth of the ozone oxide paper is preferably relatively deep in order to increase the ozone dissolution rate, and the effective depth is preferably 5 m or more and 7 to 10 m.

In addition, by applying our "prior application patent (0016716, 2009.02.17), ozone gas dissolution optimization method and ozone contact device using the method" to the riverside filtrate treatment apparatus of the present invention, the highest ozone dissolution rate is maintained, ozone injection amount Economical operation can be minimized and power consumption can be reduced.

The riverside filtrate, in which the ozone reaction is completed in the ozone oxidation paper 40, passes through the hole wall 41a provided at the end of the ozone oxidation paper 40, and then passes through the overflow weir 42 installed in the water over the required length. It is sent to the biological activated carbon filter paper (60).

Biological activated carbon filter paper forms granules of activated carbon with a thickness of 2.5 m, grows iron bacteria in the filter layer, adsorbs iron and manganese in the riverside filtrate to iron bacteria, and periodically washes the activated carbon filter layer. By removing some of these iron bacteria, iron and manganese are removed.

As the filter medium for the bioactive carbon filter paper, the granular activated carbon is used as it is. If the granular activated carbon is used as it is, the pulverized coal is contained in the activated carbon. Since it does not flow, the amount of water loss is also very large and causes a big obstacle in operation.

Therefore, it is preferable that the activated carbon of the biological activated carbon filter paper uses washed activated carbon that has been washed in advance to meet the standards for running water.

In addition, trace amounts of organic matter, taste odor causing substances, etc., which may still remain, are absorbed by activated carbon and removed.

The riverside filtration water that has passed through the activated carbon filter paper is transferred to the disinfection paper (70), and the chlorine is injected into the riverside filtration water to remove the protozoa such as viruses, E. coli, and Giardia, so that the water is suitable for drinking. .

In riverside filtrates, there are few harmful protozoa, such as siadia, which are highly resistant to chlorine, but if harmful protozoa, such as siadia, are detected, an optional UV sterilizer can be installed to protect the Giadia from UV sterilizers (UV) prior to chlorination. Can be killed and then disinfected with chlorine.

The water quality of the riverside filtrate is low in suspended solids but relatively high in iron manganese or low in iron manganese, but high in suspended solids, which is insufficient to use sand filter paper, and has a high load to use only the bioactive carbon filter paper (60). Medium water quality often occurs, in which case it is desirable to install a mechanical filter 50 with a low head of water at the front end of the bioactive carbon filter paper 60.

The mechanical filter 50 preferably uses a multi-disk type micro screen illustrated in FIG. 5 or a long fiber filter or a feathered long fiber filter (not shown above). Can be used alone or in combination with coagulant injectors and pilot tests are used to select the appropriate type of coagulant and mechanical filter.

Conventional gravity filters usually require a loss head of 2 to 2.5 meters, while mechanical filters require a loss head as small as 0.3 meters, which is advantageous in terms of plant height planning, especially when installed in flat areas. You can save a lot.

In addition, since the mechanical filter is easy to have a multi-layer structure, it can be installed in a small area of about 1/10 of the conventional sand filter, so it can be very useful when the site is insufficient or when improving the existing facilities.

The wastewater treatment plant includes a sludge collector for collecting sedimented sludge in one place and removing scum on the surface, and the sludge concentrator and dehydrator are selectively applied according to the site conditions or the size of the facility.

The present invention has been described with reference to specific drawings, mainly described for the river filtration device of a specific structure, which can be modified and modified innumerable by those skilled in the art, all these changes and modifications are to be included in the protection scope of the present invention It should be interpreted.

1 is a process block diagram of the present invention.

2 is a configuration diagram of an ozone system using liquid oxygen as a raw material.

3 is a configuration diagram of an ozone system using air as a raw material.

4 is a plan view of an ozone oxide sheet provided with a fine diffuser;

5 is an illustration of a mechanical filter.

Claims (11)

A water well 10 for collecting and collecting the riverside filtration water and temporarily storing it and transferring it to a water treatment process; Abandoned oxidizing paper (30) for selectively applying to oxidize iron in river water filtered water, to remove taste and odor, and to supply sufficient oxygen to raw water; An ozone oxide paper 40 for selectively applying ozone by injecting ozone to oxidize iron and manganese in raw water and to remove taste and odor causing substances; An ozone system 200 for effectively supplying and dissolving ozone into an ozonation paper and discharging the ozone gas in a constant amount to efficiently process the ozone; A mechanical filter (50) that is selectively installed to remove suspended matters in the riverside filtrate water passed through the oxidation aeration tank or the ozone oxidation paper and to minimize the loss head; A biological activated carbon filter paper 60 for removing traces of suspended solids, flavors, odorous substances and manganese contained in the raw water; Disinfecting paper 70 for disinfecting the filtered water of the biological activated carbon filter paper to make tap water; A water supply and drainage facility (80) passing through the disinfecting paper; And Treatment apparatus for riverside filtration using oxidized paper and biological activated carbon filter paper, characterized in that it comprises an effluent treatment facility (90) for treating the wash drainage. The aeration apparatus according to claim 1, wherein at least one of aeration apparatus using an aeration pipe and a blower, aeration apparatus using an underwater aeration and a blower, aeration apparatus using a self-contained underwater aeration, a bottom-up injection nozzle, or a bottom-down injection nozzle An apparatus for treating riverside filtrate using oxidized paper and biologically activated carbon filter paper, which is provided. The method of claim 1, wherein the ozone system uses liquid oxygen as a raw material, and includes a liquid oxygen storage tank, a vaporizer, an ozone generator, an injector, a flow meter, an ozone dissolved water pump, a main melting pipe, an exhaust fan, and an ozone destroyer. Treatment apparatus for riverside filtration using oxidized paper and biological activated carbon filter paper. The ozone system according to claim 1, wherein the ozone system comprises air as an raw material, and includes an air compressor, an air dryer, an ozone generator, a flow meter, an ozonated gas transfer pipe, a fine diffuser, a blower, an ozone destroyer, and an ozone flow meter. Treatment apparatus for riverside filtration using oxidized paper and biological activated carbon filter paper. The ozone oxide paper 40 includes at least one flow wall, a perforated pipe installed at the end, and a overflow weir, and the full width and the triangular weir overflow weirs include the overflow weir more than the minimum required length calculated by the following formula. Treatment apparatus for riverside filtration using oxidized paper and biologically activated carbon filter paper.

Where H is the height (m) from the surface of the ozone oxide ground to the upper slab ceiling. Λh: Height of change of overflow head due to change of raw water inflow (m). C: Flow coefficient of overflow weir (usually 1.8) h: Overflow head at 100% inflow (m). L: Minimum required length of overflow weir (m) x: ratio of variable flow rate to 100% inflow flow rate (x ≤ 1) Q: 100% inflow rate (same as facility capacity) (㎥ / s)

Where Λh is the change height of the head of the triangular weir by the change of raw water inflow (m). C: Flow coefficient of triangular overflow weir (usually 1.45) h: Overflow head at 100% inflow (m). L: Minimum required length of triangular overflow weir (m) x: ratio of variable flow rate to 100% inflow flow rate (x ≤ 1) Q: 100% inflow rate (same as facility capacity) (㎥ / s) N: triangular weir per 1 m of weir (usually 6) The apparatus for treating riverside filtered water using an oxidized paper and a biologically activated carbon filter paper according to claim 1, wherein the abandoned paper 30 and the ozone oxide 40 are provided together. The ozone system according to claim 1, wherein the ozone system includes various flowmeters and meters, an injector, an ozone dissolving unit, an ozone treating apparatus, and an ozone dissolving water pump. The control device of the riverside filtration water using the oxidized paper and biological activated carbon filter paper, characterized in that it comprises an automatic control device to automatically control to maintain the most efficient ozone dissolution efficiency. The apparatus of claim 1, wherein the wastewater treatment facility (90) comprises a sludge collector for transporting and collecting sedimented sludge in one place and removing scum on the water surface. . The apparatus of claim 1, wherein the mechanical filter (50) comprises a multi-disk type mechanical filter or a fibrous mechanical filter having a loss head of 300 mm or less. The apparatus of claim 1, wherein the disinfecting paper (70) includes UV sterilizer selectively. The apparatus of claim 1, wherein the biological activated carbon filter paper is a washed activated carbon filter layer.

Images