JP2000042597A - Sludge treating device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enable an effective automatic treatment to be performed in a small sized sewage treating facility, and to reduce the economical cost by discharge sludge integrated into one body with filter medium to the outside by opening the bottom of a case or rotating the case 180 degrees. SOLUTION: The sludge 11 is charged into the case 3 in which filter medium is laid 4 via a sludge feed device 2, then a movable suction 53 with permitted vertical movement is abutted on the bottom of the case 3 from a vacuum suction means 5, thus a dehydration process for reducing the inner water by an appropriate amount is performed. Later, the case 3 successively moves via a chain belt 12 and a drying process is performed in accordance with the movement. Here, microwaves generated with a microwave heating device 6 are irradiated to the sludge 11 in the case 3. After completion of the drying process, the case 3 fulfilled with the sludge 11 is rotated about 180 degree in the up and down direction, then the considerably dried sludge 11 falls down together with the filter medium 4, and for example are collected in a collection case 9.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for treating sludge generated as a result of sewage treatment in an agricultural settlement drainage treatment facility, a public sewer for specific environmental protection, a human waste separation tank, or the like.

[0002]

2. Description of the Related Art Sludge generated in wastewater treatment facilities for agricultural settlements, public sewers for specific environmental preservation, human waste septic tanks, etc., has a small scale, so the operating efficiency of dehydrators used in so-called public sewers and the like is small. It is difficult to secure.

[0003] On the other hand, in the case of the small-scale sewage treatment facilities, the principle of unmanned management is basically used. However, in order to realize unmanned management, at least a factor that automatically operates at the start and stop of operation is indispensable. It is. However, providing such an automatic device in a small-scale sewage treatment facility is difficult to adopt from the viewpoint of cost.

[0004] In addition to the above points, in a small-scale sewage treatment plant, if the water content of the dewatered cake is to be reduced, the amount of the polymer coagulant and the like used increases, which may hinder the return of the dewatered cake to agricultural land and cause disposal. Problems arise, such as selection of the destination and an increase in disposal costs.

[0005] To avoid such difficulties, even if a method is adopted in which sludge is transported in a liquid state to a human waste treatment plant in a local area, this method not only requires enormous costs, but also has a problem of receiving sludge from a septic tank. Due to restrictions and the like, it is difficult to realize smoothly.

[0006]

SUMMARY OF THE INVENTION As described above, the present invention relates to a small-scale sewage treatment facility such as an agricultural settlement wastewater treatment facility, capable of efficient automatic treatment and of low economic cost. It is an object of the invention to provide a device.

[0007]

Means for Solving the Problems In order to solve the above problems, the configuration of the present invention is as follows: (1). After supplying sludge to the case in which the filter medium capable of passing water is laid, sludge dewatering treatment and drying treatment are performed for each case, and sludge treatment based on discharging the sludge that has been subjected to these treatments from the case together with the filter medium. Method, (2). A sludge supply device for a case in which a filter medium through which water can pass is laid, a dewatering device for sludge in the case, a drying device for sludge in the case, and sludge integrated with the filter material from the case when the drying process is completed. A sludge treatment apparatus based on the provision of a device for discharging wastewater and a device for sequentially moving the case between the respective devices.

[0008]

[Action and Specific Structure of the Invention] As is clear from the above (1) and (2), the present invention basically disposes the sludge 11 which has been subjected to the dehydration and drying steps for each case together with the filter medium 4. Features.

If such a method is adopted, dehydration and drying are automatically performed on a case-by-case basis.
And discharge of the sludge 11 integrated with the filter medium 4 from the wastewater, thereby enabling sludge treatment by an unmanned process.

As described above, in the present invention, the use of the filter medium 4 is indispensable, but the filter medium 4 is required to be a material which can inevitably transmit water.

However, the filter medium 4, which is usually discharged from a small-scale sewage treatment plant, is usually buried in the soil, and if considered to be used as a fertilizer, a synthetic resin that does not corrode in the soil is used as a material. It is not preferable to use natural plant fibers that can corrode in soil.

In order to discharge the filter medium 4 to the outside together with the sludge 11 having undergone the dewatering and drying steps, the filter medium 4 must be laid in the case 3 in advance. It is convenient to provide a perforated plate having a large number of holes for discharging water that has passed through the filter medium 4, or to use a mesh-shaped material as the bottom.

As the dewatering means, means for pressurizing the case 3 from above with compressed air or vacuum dewatering means by suction from below the case 3, and further, the case 3 is rotated to perform dehydration by centrifugal force. Means and the like can be adopted. However, in order to make the operation convenient and the device inexpensive, the former two methods are appropriate, and the latter rotational movement method is not always advantageous.

As the drying means, either a means for blowing hot air into the case 3 to heat it or a means for directly heating the sludge 11 in the case 3 can be employed, but the former is used as preliminary drying. However, if the latter is used as main drying, it is very convenient because deodorization can be performed at the stage of preliminary drying.

The sludge 11 integrated with the filter medium 4 is
As a means for discharging the sludge cake, the bottom of the case 3 is opened and the sludge cake integrated with the filter medium 4 is dropped,
Alternatively, it is preferable to employ means for rotating the case 3 about 180 degrees in the vertical direction to drop the sludge cake integrated with the filter medium 4 to the outside.

[0016]

FIG. 1 shows a typical embodiment of a sludge treatment apparatus according to the present invention.

After the sludge 11 is applied from the sludge treatment tank via the sludge supply device 2 to the case 3 in which the filter medium 4 is already laid, the vacuum pump 52 and the vacuum tank 51
By bringing the movable sanction 53, which can move up and down, into contact with the bottom of the case 3 from the vacuum suction means 5 provided with, a dehydration step of reducing the amount of water in the inside considerably is performed.

Thereafter, the case 3 is connected to the chain belt 10.
, And the drying process is performed along with the movement.

In the embodiment, full-scale drying is realized by heating based on irradiating the sludge 11 in the case 3 with microwaves generated by the microwave heating device 6, but prior to this, preliminary drying is performed. As described above, hot air is blown from the microwave heating device 6 through the fan 62 from above the case 3 to previously dry the sludge 11 in the case 3 and to reflect the wind reflected from the sludge 11 on the blowing by the steam aggregating device. 7 through the deodorizer 8 and the sludge 1
1. Reduce or eliminate odors.

In the microwave heating, about 120
Although heating is performed at a temperature of about 130 ° C. to about 130 ° C., since the inner wall of the case 3 is made of metal, it is possible to prevent microwaves from transmitting to the outside, and to perform efficient heating.

After the drying step is completed, the case 3 filled with the sludge 11 is rotated about 180 degrees vertically,
As a result, the sludge 11 that has been considerably dried falls downward together with the filter medium 4, and is stored in, for example, the collection case 9.

In the embodiment, the case 3 is fixed to the chain belt 10 in advance, and the fixed portion changes from the upper side to the lower side with the rotation of the chain belt 10, so that the rotation by 180 degrees is performed. However, the method of realizing such a 180-degree rotation is not limited to the above-described method. For example, the central portion of the side surface of the case 3 is fixed to the chain belt 10 and the other Can be pushed upward by the movable sanction 53 to realize the 180-degree rotation.

The dried sludge cake integrated with the filter medium 4 by the drop is discharged from the case 3 to the collection case 9 and then subjected to post-treatment such as burying in soil.

[0024]

The present invention is not limited to the configuration of the above embodiment. That is, as is apparent from the above-described embodiment as well as the above-described operation, in the present invention, the sludge dewatering and drying processes are performed for each case in which the filter medium is already laid, so that a small-scale sludge generation treatment is performed. In the device,
Automatic processing can be realized.

Therefore, in a small-scale sludge treatment system such as an agricultural settlement drainage facility, a specific environmental conservation public sewer, and a human waste separation tank, the present invention can provide an extremely efficient and low-cost treatment system. The value is enormous.

[0026]

[Brief description of the drawings]

FIG. 1 is a side view of an apparatus for implementing a sludge treatment step according to an embodiment of the present invention.

[Explanation of symbols]

Reference Signs List 1 sludge storage tank 2 sludge supply device 3 case 4 filter material 5 vacuum suction device 51 vacuum tank 52 vacuum pump 53 movable suction of vacuum suction device 6 microwave heating device (magnetron generating microwave) 61 waveguide 62 fan 7 steam Coagulation device 8 Deodorization device 9 Collection case 10 Chain belt 11 Sludge

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[Procedure amendment]

[Submission Date] May 20, 1999 (1999.5.2
0)

[Procedure amendment 2]

[Document name to be amended] Statement

[Correction target item name] Full text

[Correction method] Change

[Correction contents]

[Document Name] Statement

[Title of the Invention] Sludge treatment equipment

[Claims]

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for treating sludge generated as a result of sewage treatment in an agricultural settlement drainage treatment facility, a public sewer for specific environmental protection, a human waste separation tank, or the like.

[0002]

2. Description of the Related Art Sludge generated in wastewater treatment facilities for agricultural settlements, public sewers for specific environmental preservation, human waste septic tanks, etc., has a small scale, so the operating efficiency of dehydrators used in so-called public sewers and the like is small. It is difficult to secure.

[0003] On the other hand, in the case of the small-scale sewage treatment facilities, the principle of unmanned management is basically used. However, in order to realize unmanned management, at least a factor that automatically operates at the start and stop of operation is indispensable. It is. However, providing such an automatic device in a small-scale sewage treatment facility is difficult to adopt from the viewpoint of cost.

[0004] In addition to the above points, in a small-scale sewage treatment plant, if the water content of the dewatered cake is to be reduced, the amount of the polymer coagulant and the like used increases, which may hinder the return of the dewatered cake to agricultural land and cause disposal. Problems arise, such as selection of the destination and an increase in disposal costs.

[0005] To avoid such difficulties, even if a method is adopted in which sludge is transported in a liquid state to a human waste treatment plant in a local area, this method not only requires enormous costs, but also has a problem of receiving sludge from a septic tank. Due to restrictions and the like, it is difficult to realize smoothly.

[0006]

SUMMARY OF THE INVENTION It is an object of the present invention, as described above, in the small-scale sewage treatment facilities, such as rural waste water treatment facilities, it is capable of efficient automatic processing apparatus according to the cheap processing method economical cost It is an object of the invention to provide the following.

[0007]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention provides a sludge supply device for a case in which a filter medium through which water can pass, a dewatering device for sludge in the case, and a sludge supply device for sludge in the case. At the stage where the drying device and the drying process are completed, the sludge integrated with the filter medium is removed from the case by opening the bottom of the case or by rotating the case by 180 degrees.
It comprises a sludge treatment device based on the provision of a device for discharging to the outside by rotating and a device for sequentially moving the case between the devices.

[0008]

[Specific Configuration of the action and the Invention To solve the above problems
As is clear from the means described above, the present invention is basically characterized in that the sludge that has undergone the dehydration and drying steps for each case is discarded together with the filter medium.

If such a method is adopted, it is possible to automatically perform dehydration and drying processing on a case-by-case basis, and to discharge sludge integrated with the filter medium from the case, and thereby to realize sludge treatment by an unmanned process. Becomes possible.

As described above, in the present invention, the use of a filter medium is indispensable, but the filter medium is necessarily required to be a material through which water can permeate.

However, the filter medium normally discharged from a small-scale sewage treatment plant is usually buried in the soil, and is considered to be made of a synthetic resin that does not corrode in the soil if it is considered to be used as a fertilizer. This is not preferred, and it is preferable to use natural plant fibers or the like that can corrode in soil.

In order to discharge the filter medium to the outside together with the sludge having undergone the dewatering and drying steps, the filter medium was previously laid in a case, and in order to realize the dewatering step, the filter medium was passed through the bottom of the case. It is convenient to provide a perforated plate with a large number of holes for draining water, or to use a mesh material as the bottom.

In the present invention, it is most appropriate to employ vacuum dewatering means by suction from below the case as the dewatering means.

As the drying means, either a means for blowing hot air into the case to heat it or a means for directly heating the sludge in the case can be employed. The former is used as preliminary drying and the latter is used as preliminary drying. If used as final drying,
It is very convenient because deodorization can be performed at the stage of predrying.

As means for discharging the sludge integrated with the filter medium from the case, the bottom of the case is opened and the sludge cake integrated with the filter medium is dropped, or the case is rotated about 180 degrees in the vertical direction. Adopts the process of dropping the sludge cake integrated with the filter media to the outside
In addition, there is a need for an apparatus that realizes the process .

[0016]

FIG. 1 shows a typical embodiment of a sludge treatment apparatus according to the present invention.

After the sludge 11 is applied from the sludge treatment tank via the sludge supply device 2 to the case 3 in which the filter medium 4 is already laid, the vacuum pump 52 and the vacuum tank 51
By bringing the movable sanction 53, which can move up and down, into contact with the bottom of the case 3 from the vacuum suction means 5 provided with, a dehydration step of reducing the amount of water in the inside considerably is performed.

Thereafter, the case 3 is connected to the chain belt 10.
, And the drying process is performed along with the movement.

In the embodiment, full-scale drying is realized by heating based on irradiating the sludge 11 in the case 3 with microwaves generated by the microwave heating device 6, but prior to this, preliminary drying is performed. As described above, hot air is blown from the microwave heating device 6 through the fan 62 from above the case 3 to previously dry the sludge 11 in the case 3 and to reflect the wind reflected from the sludge 11 on the blowing by the steam aggregating device. 7 through the deodorizer 8 and the sludge 1
1. Reduce or eliminate odors.

In the microwave heating, about 120
Although heating is performed at a temperature of about 130 ° C. to about 130 ° C., since the inner wall of the case 3 is made of metal, it is possible to prevent microwaves from transmitting to the outside, and to perform efficient heating.

After the drying step is completed, the case 3 filled with the sludge 11 is rotated about 180 degrees vertically,
As a result, the sludge 11 that has been considerably dried falls downward together with the filter medium 4, and is stored in, for example, the collection case 9.

In the embodiment, the case 3 is fixed to the chain belt 10 in advance, and the fixed portion changes from the upper side to the lower side with the rotation of the chain belt 10, so that the rotation by 180 degrees is performed. However, the method of realizing such a 180-degree rotation is not limited to the above-described method. For example, the central portion of the side surface of the case 3 is fixed to the chain belt 10 and the other Can be pushed upward by the movable sanction 53 to realize the 180-degree rotation.

The dried sludge cake integrated with the filter medium 4 by the drop is discharged from the case 3 to the collection case 9 and then subjected to post-treatment such as burying in soil.

[0024]

The present invention is not limited to the configuration of the above embodiment. That is, as is apparent from the above-described embodiment as well as the above-described operation, in the present invention, the sludge dewatering and drying processes are performed for each case in which the filter medium is already laid, so that a small-scale sludge generation treatment is performed. In the device,
Automatic processing can be realized.

Therefore, in a small-scale sludge treatment system such as an agricultural settlement drainage facility, a specific environmental conservation public sewer, and a human waste separation tank, the present invention can provide an extremely efficient and low-cost treatment system. The value is enormous.

[0026]

[Brief description of the drawings]

FIG. 1 is a side view of an apparatus for implementing a sludge treatment step according to an embodiment of the present invention.

[Description of Signs] 1 Sludge storage tank 2 Sludge supply device 3 Case 4 Filter material 5 Vacuum suction device 51 Vacuum tank 52 Vacuum pump 53 Movable sanction of vacuum suction device 6 Microwave heating device (magnetron generating microwave) 61 Waveguide Pipe 62 Fan 7 Steam coagulation device 8 Deodorization device 9 Collection case 10 Chain belt 11 Sludge

Claims (7)

[Claims] After supplying sludge to a case in which a filter medium capable of passing water is laid, sludge is dewatered and dried for each case, and the sludge that has been subjected to these treatments is discharged from the case together with the filter medium. Sludge treatment method based on. 2. A sludge supply device for a case in which a filter medium through which water can pass is laid, a dewatering device for sludge in the case, a drying device for sludge in the case, and a filter medium from the case when the drying process is completed. A sludge treatment apparatus based on providing an integrated sludge discharging device and a device for sequentially moving the case between the respective devices. 3. A means for pressurizing with compressed air from the upper side of the case, or a so-called vacuum dewatering means by suction from the lower side of the case, or a case in which the case is rotated by a centrifugal force accompanying the rotation. 3. The sludge treatment apparatus according to claim 2, wherein a means for performing dehydration is employed. 4. A pre-drying means for sending heated air to the sludge in the case as a drying means and passing a reflected wind through a deodorizing treatment device, and a microwave heating device as a full-scale drying means. The sludge treatment apparatus according to claim 2 based on: 5. The sludge treatment apparatus according to claim 4, wherein heating air is supplied from a microwave heating apparatus via a fan as predrying means. 6. The method according to claim 2, wherein the dried sludge and the filter medium are integrally discharged by opening the bottom of the case or rotating the case by 180 degrees.
The sludge treatment device according to the above. 7. The sludge treatment apparatus according to claim 2, wherein a perforated plate or a net provided with a large number of holes is laid at the bottom of the case.