JP2001000992A - Wastewater treatment apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To realize low initial cost and low running cost while enabling the treatment of org. wastewater of every kind containing a soluble org. substance or a large solid in a wastewater treatment apparatus for cleaning org. wastewater. SOLUTION: A wastewater treatment apparatus is equipped with a treatment tank 2 in which org. wastewater flows, a cleaning drum 5 arranged in the treatment tank 2 and having a screen 7 on its wall surface, a microorganism fixed filter medium 6 housed in the cleaning drum 5 and having microorganisms bonded thereto, a motor 8 for rotating the cleaning drum 5, a controller 9 for controlling the motor 8, a collapsing means for collapsing the microorganism fixed filter medium 6 laminated on the wall surface of the cleaning drum 5 by centrifugal force to peel to a solid, an ultrasonic sensor 15 for detecting the thickness of the microorganism fixed filter medium 6 laminated on the wall surface of the cleaning drum 5 and/or a water detection sensor 16 for detecting the flow rate of wastewater transmitted through the bed of the microorganism fixed filter medium 6.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wastewater treatment apparatus for purifying organic matter in wastewater containing organic matter, and more particularly, to crushing garbage discharged from a kitchen or the like of a home or business, and using the crushed garbage. The present invention relates to a wastewater treatment device for purifying crushed materials.

[0002]

2. Description of the Related Art In recent years, environmental pollution due to wastewater from homes and businesses has become a problem, and there has been a demand for a wastewater treatment apparatus having an excellent purification ability.

Conventionally, an organic wastewater treatment apparatus using a rotating body has been proposed, for example, in Japanese Patent Publication No. 60-31549.

[0004] A conventional wastewater treatment apparatus will be described below with reference to Figs.

FIG. 7 is a cross-sectional view of a conventional wastewater treatment apparatus, FIG. 8 is a cross-sectional view of a main portion of a conventional wastewater treatment apparatus, and an operation explanatory diagram at the time of purification, and FIG. It is explanatory drawing in the case of washing | cleaning the filter medium inside.

Reference numeral 25 denotes a motor. A centrifuge 27 is connected to an upper shaft via a clutch unit 26. The clutch unit 26 is configured to transmit power to the centrifuge 27 only when the motor 25 rotates forward.

[0007] The centrifugal separation tube 27 has a substantially equal diameter at the upper middle and a conical shape at the lower end.
, And several rear liquid ejection holes 29 are formed on the circumference of the circle at the upper end of the inner surface. Reference numeral 30 denotes a filter in which a number of small holes 31 are formed in a band-shaped film having both ends, and the filter 30 is attached to the inner surface of the centrifugal separation tube 27 so as to be freely attached. Further, a granular filter medium 32 such as pebbles and sand is loaded in the centrifuge 27. On the other hand, a connecting shaft 33 is provided on a shaft below the motor 25.
The impeller 34 (hereinafter, referred to as a push-up pump) is connected via the. A bathtub 35 has two water intake holes 36 on the side wall.
37 and a gas pot 40 via piping pipes 38 and 39.
And a heat exchanger such as Next, plumbing pipe 3
An opening pipe for receiving the purified liquid is provided from an intermediate position of the pipe 8 to the lifting pump 34 and an intermediate pipe of the pipe pipe 39 is provided from the intermediate position. Reference numeral 41 denotes a movable hose, which is configured so that it can be switched to reduce the purified liquid into the bathtub or to discharge the wastewater after washing in the centrifuge tube.

In order to purify the filth existing in the bathtub, first, when the motor 25 is rotated forward, the push-up pump 34 connected to the connecting shaft 33 is rotated. Through a pipe 38, the water is supplied to a substantially central portion of the centrifugal separation cylinder 27 which is also rotated by the motor 25. On the other hand, the granular filter medium 32 loaded in the centrifuge tube 27 adheres in a belt shape along the inner wall of the filter 30 with the rotation of the centrifuge tube 27 to form a membrane. Then, the sewage (liquid + solid matter) supplied to the centrifuge 27 is pressed against the filter medium. Therefore, the sewage is allowed to pass between the granular filter media, but the filter media 32 itself exerts an outward force due to centrifugal force to reduce the gap between the filter media, so that the waste having a large particle size is relatively small. Particles of a particle size are also collected at this stage. However, the fine particles and the liquid pass between the filter media 32 and reach the inside of the filter 30, and then pass through the small holes 31 formed in the filter 30 and reach the inner wall of the centrifuge cylinder 27, but the holes are formed in the side walls. Since there is no force, the outward force h due to the centrifugal force works and hydraulic pressure is generated. This hydraulic pressure is equal to the outward force h about the point i as the axis center, h '.
Works upward, and the filter 30 and the centrifuge tube 2
As a result of the application of fluid pressure between the inner surfaces of
0 is contracted inward to form a slight gap j. The fine particles are also filtered through the small gap j, and only the liquid flows along the gap j, is blown to the outer periphery from the liquid extraction hole 29, and returns only the liquid purified by the hose 41 again.

Next, when cleaning the contaminants accumulated in the centrifuge cylinder 27, first, when the motor 25 is rotated in the reverse direction, the lifting pump 34 directly connected to the motor shaft is rotated, and the remaining hot water in the bathtub is rotated. The water is supplied to the centrifugal separation tube 27 in the same manner as in the case where the water is purified through the water hole 36 and the pipe 38. Since the negative centrifuge 27 is stopped by the idling mechanism of the clutch 26, the filter material in the centrifuge 27 has a strip-shaped membrane collapsed as shown in FIG. 9 and has moved to the bottom of the centrifuge 27. In such a state, the hot water f 'is supplied from above, so that the hot water f' and the filter medium come into contact with each other to cause the dirt to float up, overflow from the liquid extraction hole 29 or the inner flange 28 and become the waste water g ', and the hose 41 is discharged. Switch to the discharge side to discharge outside the device.

[0010] Depending on the degree of contamination of the filter medium, the filter medium can be moved by repeating forward and reverse rotations of the motor while supplying hot and cold water into the centrifugal separation tube, so that all of the waste can be discharged.

[0011]

However, in the above-mentioned conventional wastewater treatment apparatus, a. Since microorganisms do not inhabit the filter media, insoluble organic matter having a particle size contained in organic wastewater and existing as solid matter can be removed, but soluble organic matter completely dissolved in water is removed. Can not do.

B. Since the rotating body is not directly immersed in the wastewater to be treated, a push-up pump is required, and the rotating body also has a dual structure of a centrifuge cylinder and a filter, which requires initial costs and running costs.

C. Since the push-up pump is provided in the drainage channel, wastewater having large solids that bite into the push-up pump cannot be treated.

D. When cleaning waste that has accumulated in the centrifuge cylinder, since the waste is separated directly from the filter medium in the centrifuge cylinder and is not directly discharged from the centrifuge cylinder, washing water is often used and cleaning efficiency is low. If the switching device at the time of discharge breaks down, there is a possibility that hot water after washing the filter medium (hereinafter referred to as filter medium washing water) re-enters the bathtub.

E. In the case of cleaning the filth remaining in the centrifugal separation tube 27, since there is no dedicated discharge channel, a switching device for discharging the filter medium cleaning water is required, and the initial cost and the running cost are required. There was a problem that.

The present invention solves the above-mentioned conventional problems, and is capable of treating various organic wastewaters containing soluble organic matter and large solid matter at low initial cost and low running cost, and is always stable. An object of the present invention is to provide a wastewater treatment device capable of supplying treated water.

[0017]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention provides a processing tank, a rotating body installed in the processing tank and having a mesh-like or porous wall, and a rotating body inside the rotating body. A contained microorganism-fixed filter medium, a motor for rotating the rotating body, a thickness detection sensor for detecting the thickness of the microorganism-fixed filter layer laminated on the wall of the rotating body, and / or drainage permeating the microorganism-fixed filter layer. And a clogging sensor for detecting the flow rate.

With this configuration, there is provided a wastewater treatment apparatus capable of reducing initial cost and running cost, treating various organic wastewater containing soluble organic matter and large solid matter, and constantly supplying stable treated water. You can do it.

[0019]

DETAILED DESCRIPTION OF THE INVENTION A wastewater treatment apparatus according to a first aspect of the present invention includes a treatment tank, a rotating body installed in the treatment tank and having a mesh-like or porous wall, and an inside of the rotating body. And a motor that rotates the rotating body, a thickness detection sensor that detects the thickness of the microorganism-fixed filter layer stacked on the wall surface of the rotating body, and / or a filter that transmits through the microorganism-fixed filter layer. And a clogging sensor for detecting a drainage flow rate.

With this configuration, the following operations are provided.

A. When the rotating body rotates, the microorganism-fixed filter medium adheres to the wall surface of the rotating body, and the wastewater flowing into the rotating body penetrates the wall surface on which the microorganism-fixed filter medium is adhered, so that insoluble organic matter is removed from the microorganism-fixed filter medium. The soluble organic matter trapped in the layer is brought into contact with the microorganisms that inhabit the microorganism-fixed filter medium, taken up by the microorganisms, and converted into microorganisms, thereby purifying the wastewater.

B. Since the clogging sensor is provided, the layer of the microorganism-fixed filter medium can always be held uniformly.

Here, as the shape of the treatment tank, a shape in which at least a part of the side surface is inclined inward, a shape in which the lower part is formed in a conical shape, a columnar shape, a prismatic shape, and the like are used.

Here, as the microorganism, an aerobic microorganism group and a facultative anaerobic microorganism are used, and as the aerobic microorganism group, for example, a zoogala bacterium, and as the facultative anaerobic microorganism, for example, a bacillus bacterium are preferably used. Used.

The microorganism-fixing filter material may be any solid material that can adhere microorganisms, and preferably has a specific gravity close to that of water and excellent fluidity in drainage. Lamination is easy, and cellulose, polyethylene glycol, polyvinyl alcohol, urethane, polypropylene and the like are preferably used. Further, it preferably has continuous porosity and / or hydrophilicity in shape and properties, and urethane foam, foamed cellulose and the like are suitably used.

As means for rotating the rotating body, a belt drive, a chain drive, a gear drive, or the like is used in addition to the motor drive. Alternatively, the rotating body may be mounted on a rotor and driven by energizing an external stator.

According to a second aspect of the present invention, there is provided the wastewater treatment apparatus according to the first aspect, wherein the control unit for controlling the motor and the microorganisms stacked on a wall surface of the rotating body by centrifugal force. And a collapsing means for collapsing the fixed filter medium.

This configuration has the following functions.

A. Since the disintegration means is provided, the insoluble organic matter and the extra microorganisms (hereinafter, referred to as solid matter) that have been captured by the microorganism-fixed filter medium can be peeled off.

The second aspect of the present invention is the first aspect.
Wherein the control unit controls the motor, and collapse means for breaking down the microorganism-fixed filter medium attached to the wall surface of the rotating body by centrifugal force.

With this configuration, in addition to the function of the first aspect,
It has the following effects.

A. It becomes possible to control the operation of the motor.

B. It is possible to efficiently discharge the washing water of the microorganism-fixed filter medium without diffusing it into the treatment tank.

The third aspect of the present invention is the first aspect.
Or the wastewater treatment device according to 2, further including a solid discharge means for discharging solids inside the rotating body.

According to this configuration, the following operation is obtained in addition to the operation of the first or second aspect.

A. The microorganism-fixed filter medium washing water can be efficiently discharged without diffusing into the treatment tank.

The invention described in claim 4 of the present invention is claim 1
The wastewater treatment device according to any one of claims 3 to 3,
The thickness detection sensor is configured to be a motor load detection sensor that detects a load applied to a rotating motor of the rotating body.

According to this configuration, the following operation is obtained in addition to the operation described in any one of the first to third aspects.

A. If the thickness of the layer of the microorganism-fixing filter material is not uniform, the rotation of the purification drum is blurred, and this can be detected as a load applied to the motor.

B. This has the effect that it is possible to detect whether the layer of the microorganism-fixed filter medium is uniform without providing a new device.

The fifth aspect of the present invention is the first aspect of the present invention.
The wastewater treatment device according to any one of claims 4 to 4,
The thickness detection sensor has a configuration that is an ultrasonic sensor and / or an optical sensor.

With this configuration, in addition to the function of any one of the first to fourth aspects, the following function is provided.

A. Ultrasonic waves and / or light are irradiated in parallel with the layer of the microorganism-fixed filter medium, and the thickness of the microorganism-fixed filter medium can be detected by constantly measuring the reflection distance.

Here, the position where the ultrasonic sensor and the optical sensor are provided may be above or below the rotating body.

According to a sixth aspect of the present invention, there is provided the wastewater treatment apparatus according to any one of the first to fifth aspects, wherein the control unit is configured so that the thickness detection sensor is the microorganism fixed filter medium. When the thickness of the layer is detected to be equal to or more than a predetermined value, the collapse means is operated.

According to this configuration, the following operation is obtained in addition to the operation of any one of the first to fifth aspects.

A. It is possible to detect whether the layer of the microorganism-fixing filter is uniform or not. Even if the layer is not uniform, it is possible to always secure a stable treated water quality by stacking again.

According to a seventh aspect of the present invention, there is provided the wastewater treatment apparatus according to any one of the first to sixth aspects, wherein the clogging sensor detects the wastewater discharged from the rotating body. It has a configuration that is a flow sensor for measuring the flow rate of the liquid.

According to this configuration, the following operation is obtained in addition to the operation of any one of the first to sixth aspects.

A. The state of clogging of the layer of the microorganism-fixed filter medium can be detected, and the state of the microorganism-fixed filter medium can be always grasped.

Here, as the flow rate sensor, an electromagnetic type, a propeller type, a paddle type, a flapper type or the like is used.

The invention according to claim 8 of the present invention is the wastewater treatment apparatus according to any one of claims 1 to 7, wherein the clogging sensor detects a water level in the treatment tank. A water level detection sensor.

With this configuration, the following operation is obtained in addition to the operation described in any one of the first to seventh aspects.

A. The microbe-fixed filter media becomes clogged, and the flow rate of wastewater permeating the microbe-fixed filter media decreases, so the water level outside the rotating body rises.By detecting the water level, the clogging of the microbial-fixed filter media layer can be prevented. The situation can be detected, and the situation of clogging of the microorganism-fixed filter medium can be always grasped.

Here, as the water level sensor, an electrode type, a float type, a pressure type or the like is used.

According to a ninth aspect of the present invention, there is provided the wastewater treatment apparatus according to any one of the first to eighth aspects, wherein the clogging sensor is a motor that rotates the rotating body. , Which is a motor load detection sensor for detecting a load applied to the motor.

With this configuration, the following operation is obtained in addition to the operation of any one of the first to eighth aspects.

A. As the clogging of the microorganism-fixed filter media progresses, the weight of the rotating body increases and the load on the motor also increases.Therefore, the load on the motor is detected to grasp the state of clogging of the layer of the microorganism-fixed filter media. be able to.

B. It is possible to detect the state of clogging of the layer of microorganism-fixed filter media without installing new equipment,
It is possible to always grasp the condition of the microorganism-fixed filter medium.

According to a tenth aspect of the present invention, there is provided the wastewater treatment apparatus according to the third aspect, wherein the net-like or porous member is disposed inside the rotating body and vertically divides the inside of the rotating body. The partition wall of the shape, the wall surface of the rotating body is formed in a mesh or porous upper side than the partition plate, the wall surface of the rotating body is formed in a non-porous lower side than the partition plate, The solid discharge means includes a solid discharge pipe having one end connected to the lower end of the rotating body and the other end connected to the outside to discharge solids together with the washing water, and a solid discharge pipe provided at a predetermined portion of the solid discharge pipe. A pump or an electric valve provided and controlled by the control unit; and a drainage introduction unit formed by drilling in the bottom of the rotating body.

With this configuration, in addition to the function of the third aspect,
It has the following effects.

A. Since the washing water of the microorganism-fixed filter medium can be discharged into the treatment tank without diffusing, and solids contained in the wash water of the microorganism-fixed filter medium can be accumulated, the number of times of solid matter discharge can be reduced.

B. Since the drainage can flow into the inside of the rotating body from the entrance of the drainage passage due to the water pressure, the rotating shaft of the motor can be shortened, so that the load on the motor can be reduced.

According to an eleventh aspect of the present invention, there is provided the wastewater treatment apparatus according to any one of the first to tenth aspects, wherein the clogging sensor overflows from an upper portion of the rotating body. It has a configuration that is a water detection sensor for detecting the drained water.

With this configuration, the following operation is obtained in addition to the operation of any one of the first to tenth aspects.

A. By detecting the change in the overflow rate of the wastewater, it is possible to detect the state of clogging of the layer of the microorganism-fixed filter medium, so that the state of the microorganism-fixed filter medium can be always grasped.

Here, an electrode type or the like is used as the water detection sensor.

According to a twelfth aspect of the present invention, there is provided the wastewater treatment apparatus according to any one of the first to eleventh aspects, wherein the control unit includes the clogging sensor and the microorganism fixing filter medium. When it is detected that the flow rate of the wastewater permeating the bed is equal to or less than a predetermined value, the apparatus is configured to operate the collapse means and / or the solid matter discharge means.

With this configuration, the following operation is obtained in addition to the operation of any one of the first to eleventh aspects.

A. It is possible to detect the state of clogging of the layer of the microorganism-fixed filter medium, and even if sudden clogging occurs due to fluctuations in the inflow load, the collapse means and / or the solid matter discharge means operate and immediately wash it. As a result, stable treated water quality can always be secured.

According to a thirteenth aspect of the present invention, there is provided the wastewater treatment apparatus according to any one of the first to twelfth aspects, wherein the microorganism-fixed filter medium is formed in a continuous porous shape. have.

With this configuration, the following operation is obtained in addition to the operation of any one of the first to twelfth aspects.

A. Since the microorganism-fixed filter medium is formed in a continuous porous shape, the drainage penetrates into the microorganism-fixed filter medium and can also utilize the purifying action of microorganisms living inside the microorganism-fixed filter medium, and the purification capacity per unit area of the microorganism-fixed filter medium (The amount of organic substances removed) can be improved.

According to a fourteenth aspect of the present invention, there is provided the wastewater treatment apparatus according to any one of the first to thirteenth aspects, wherein the microorganism-fixed filter medium is made of cellulose having continuous porosity. Have.

With this configuration, the following operation is obtained in addition to the operation of any one of the first to thirteenth aspects.

A. Since the microorganism-fixing filter has hydrophilicity, the wastewater penetrates into the inside of the microorganism-fixing filter, and the purification capacity per unit area of the microorganism-fixing filter (removal of organic matter)
Can be improved.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.

(Embodiment 1) FIG. 1 is an overall configuration diagram of a wastewater treatment apparatus according to Embodiment 1 of the present invention. FIG. 2 is an enlarged view of a portion A in FIG. 1, and FIGS. 3 and 4 are configuration diagrams of another purifying drum according to the first embodiment of the present invention.

1 and 2, reference numeral 1 denotes a wastewater treatment apparatus according to the first embodiment, 2 denotes a treatment tank into which wastewater flows,
Reference numeral 3 denotes an inflow pipe through which organic wastewater (hereinafter, referred to as wastewater) flows. Organic wastewater includes household wastewater discharged from households, human wastewater discharged from households and businesses,
Manure wastewater from livestock, etc., food processing wastewater discharged from food processors, kitchen crushed water obtained by crushing garbage generated from kitchens of households and kitchens of business entities by a crusher, and the like.
4 is an inner cylinder disposed inside the processing tank 2 and having upper and lower surfaces opened,
Reference numeral 5 denotes a purifying drum which is a rotatable member disposed rotatably concentrically with the inner cylinder 4 inside the inner cylinder 4, and reference numeral 6 denotes a microorganism-fixed filter medium contained in the purifying drum 5 and containing microorganisms. As the microorganism, an aerobic microorganism group and a facultative anaerobic microorganism are used. As the aerobic microorganism group, for example, a zooglare bacterium is preferably used, and as the facultative anaerobic microorganism group, for example, a bacillus bacterium is preferably used. The microorganism-fixing filter material 6 may be any solid material capable of adhering microorganisms, and is preferably a material having a specific gravity close to water and excellent in fluidity in drainage, which facilitates lamination on the screen 7. , Cellulose, polyethylene glycol, polyvinyl alcohol,
Urethane, polypropylene and the like are preferably used. Further, it preferably has a continuous porous shape and / or hydrophilicity in shape and properties, and examples thereof include urethane foam and foamed cellulose. The reason why the continuous porous and / or hydrophilic microorganism-immobilized filter medium 6 is preferable is that B in FIG.
As shown in the part, the moisture inside the microorganism fixing medium 6 is released by the centrifugal force of the purification drum 5, and the wastewater flowing into the purification drum 5 can be permeated as shown by the arrow a. The drainage penetrates into the filter media 6,
This is because the purifying action of the microorganisms living inside the microorganism-fixed filter medium 6 can also be used, and the purification capacity (organic matter removal amount) per unit area of the microorganism-fixed filter medium 6 can be improved. Reference numeral 7 denotes a screen serving as a wall surface of the purification drum 5, which is formed in a porous shape, and the pore diameter of the screen 7 may be smaller than the pore diameter capable of capturing the microorganism-fixed filter medium 6. Reference numeral 8 denotes a motor for rotating the purification drum 4 via a rotation shaft. The rotation of the purification drum 5 may be driven by a rotating shaft, belt drive, chain drive, or gear drive. Further, the purifying drum 5 may be mounted on a rotor and driven by energizing an external stator. Reference numeral 9 denotes a controller serving as a control unit for controlling the operation of devices such as the motor 8. The rotation speed of the purification drum 5 needs to be higher than the rotation speed at which the microorganism-fixed filter medium 6 accommodated therein can be stacked on the screen 7 on the wall surface due to the centrifugal force. After laminating 6 on the screen 7, it is also possible to rotate the screen 6 at a reduced rotation speed so that the 6 does not collapse. Further, the purification drum 5 may be constantly rotated or may be rotated intermittently. Reference numeral 10 denotes a solid substance extraction pipe having one end disposed inside the purification drum 5 and the other end communicating with the outside, 11 denotes a pump disposed at a predetermined portion of the solid substance extraction pipe 10, and 12 denotes an upper part of a wall surface of the processing tank 2. An outflow pipe connected to the exhaust pipe for discharging the supernatant, 13 is a processing section inside the inner cylinder 4, and 14 is a processing tank 2.
And a settling portion which is a gap between the inner cylinder 4. The processing part 13 and the sedimentation part 14 are separated by the inner cylinder 4 and only the bottom part of the processing tank 2 is connected, and the sedimentation part 14 is connected to the outflow pipe 12. Reference numeral 15 denotes an ultrasonic sensor which is disposed above the purification drum 5 and irradiates ultrasonic waves in parallel with the screen 7 as a thickness detection sensor. After the microorganism fixing medium 6 is laminated on the screen 7, the microorganism fixing medium 6 has a uniform thickness. To detect if they are stacked. By arranging the thickness detection sensor,
If the layer of the microorganism-fixing filter medium 6 is non-uniform, the ultrasonic wave is reflected at the thick portion of the layer that always occurs on the purification drum 5, and the non-uniform thickness can be detected by shortening the reflection distance. Reference numeral 16 denotes a cleaning drum 5 disposed above the cleaning drum 5.
This is a water detection sensor, which is a clogging sensor for detecting drainage overflowing from above, and an electrode type sensor or the like is used.

The operation of the waste water treatment apparatus of the first embodiment configured as described above will be described below with reference to FIGS. 1 and 2.

First, waste water is caused to flow from the inflow pipe 3 into the processing section 13 of the processing tank 2. This waste water may flow directly into the purification drum 5.

The wastewater that has flowed into the processing section 13 of the processing tank 2 flows into the purification drum 5 by the water flow indicated by the arrow a shown in FIG. The water flow indicated by the arrow a is generated by the centrifugal force of the purification drum 5.
The wastewater inside is discharged to the outside, collides with the inner cylinder 4 and flows upward, so that the water level of the processing unit 13 rises and flows again into the purification drum 5 due to overflow.
Further, since the wastewater exists in a stirring state due to a water flow as indicated by an arrow b generated by the rotation of the purification drum 5, the wastewater flows into the purification drum 5 evenly. The wastewater comes into intense contact with the air by the water flows a and b, whereby oxygen in the air is dissolved, and the same effect as aeration can be obtained.

The wastewater flowing into the purification drum 5 is directed toward the screen 7 by the centrifugal force and permeates through the layer of the microorganism-fixed filter medium 6 formed by the centrifugal force of the purification drum 5. When the layer of the microorganism-fixed filter medium 6 is not uniform, the ultrasonic sensor 15 serving as a thickness detection sensor is
Is detected, the rotation speed of the motor 8 is reduced, or the rotation of the motor 8 is stopped, whereby the microorganism-fixed filter medium 6 laminated on the screen 7 is once collapsed, and the rotation speed is restored again. Layered, and microbe-fixed filter media 6
Layer is made uniform in thickness.

In general, the organic wastewater differs depending on the type, but as a factor of water pollutants, non-soluble organic matter which does not dissolve in water but exists as solids having various particle diameters, and water completely dissolves in water. There is a soluble organic substance that is present, and the organic substance is removed from the wastewater (hereinafter, referred to as purification) by the following action. As shown in FIG. 2, when wastewater permeates through the layer of the microorganism-fixed filter medium 6, the insoluble organic matter is captured by the layer of the microorganism-fixed filter medium 6, and the soluble organic matter is collected by the microorganisms in the microorganism-fixed filter medium 6. The wastewater is purified by being brought into contact with the microorganisms and taken up by the microorganisms to form microorganisms. Further, if the microorganism-fixed filter medium 6 is porous and / or hydrophilic, purification of wastewater is performed on the surface and inside of the microorganism-fixed filter medium 6.

The purified wastewater is separated into supernatant water and solids by natural settling in the sedimentation section 14. Here, the solid matter refers to the insoluble organic matter that could not be completely captured by the purification drum 3 and the microorganism-immobilized filter medium 6 that multiplied and proliferated.
Extra microbial organisms (hereinafter referred to as excess sludge) separated from
Is a mixture of The supernatant water (hereinafter referred to as treated water) existing at the upper part of the sedimentation section 14 is discharged to the public water area, public sewerage, etc. by overflowing through the outflow pipe 12, and the precipitated solid is formed along the bottom slope of the treatment tank 2. It precipitates, enters the processing unit 13, is diffused by the water flow indicated by the arrow b, and flows into the purification drum 5 again.

As the purification of the wastewater progresses, the microorganism-fixed filter medium 6 is clogged by solid substances (captured insoluble organic matter and generated excess sludge) adhering to the microorganism-fixed filter medium 6. At this time, when the water detection sensor 16 detects that the microorganism-fixed filter medium 6 is clogged, a collapse means for washing the microorganism-fixed filter medium 6 and a solid matter discharging means are performed. The collapse means here means that the microorganism-fixed filter medium 6 laminated on the screen 7 by centrifugal force is applied to the screen 7
Is a means for removing solid matter attached to the microorganism-fixed filter medium 6, and the solid matter discharge means is a means for removing the washing water of the microorganism-fixed filter medium 6 containing the solid matter separated from the microorganism-fixed filter medium 6 to the outside. It is a means for discharging.

Hereinafter, the collapse means and the solid discharge means will be described with reference to FIGS.

First, the collapse means will be described.

3 and 4, reference numeral 5 denotes a purifying drum,
6 is a microorganism fixing filter, 7 is a screen, 8 is a motor, 9
Is a controller, 10 is a solids drawing tube, and 11 is a pump. These are the same as those in FIG. Reference numeral 17 denotes a scraping arm whose tip is located near the inner wall of the cleaning drum 5, 23 denotes a liquid ejecting device, and 24 denotes a liquid ejecting device having one end connected to the liquid ejecting device 23 and the other end opening toward the inner wall of the purifying drum 5. Nozzle.

In the first collapse means, the rotation speed of the motor 8 is reduced by the controller 9, and the microorganism-fixed filter material 6 laminated on the screen 7 is collapsed by centrifugal force.
The microorganism-fixed filter medium 6 is rotated at a rotation speed lower than or equal to the lamination speed, or reversely or forward / reversely.
Is caused to collide with the bottom of the purification drum 5 and the screen 7, and the solid matter adhering to the microorganism-fixed filter medium 6 is peeled off.

In the second collapse means, as shown in FIG. 3, the liquid is ejected by the liquid ejecting device 23 from the liquid ejecting nozzle 24 to the microorganism-fixed filter medium 6 laminated on the screen 7, thereby causing the liquid to fall. The impact force separates solids and excess sludge. In this case, the liquid may be ejected in a state where the rotation of the purification drum 5 is stopped, or the microorganism-fixed filter medium 6 is once collapsed and rotated again at a rotation speed equal to or lower than the lamination speed, or reversely rotated, or repeated forward / reverse rotation. Alternatively, the liquid may be ejected. The jet liquid is treated
Water, treated water discharged from the outflow pipe 12, tap water, and the like.

In the third collapsing means, as shown in FIG. 4, the microbe-fixed filter media 6 laminated on the screen 7 is directly scraped off using a scraping arm 17, so that the solid material is imposed by the impact force. Is peeled off. The scraping arm 17 may be arranged such that the upper end thereof is disposed on a driving unit such as a motor, and can be moved up and down by controlling the driving unit.

Next, the solid discharge means will be described.

In the first solid discharging means, the pump 11 is operated at the same time as the collapse means, and the solid drawing pipe 1 is turned off.
Then, the washing water that has washed the microorganism-fixed filter medium 6 containing the solids separated from the microorganism-fixed filter medium 6 is discharged to the outside.

In the second solid discharge means, the discharge port of the solid extraction pipe 10 is immersed in a storage tank (not shown) lower than the surface of the treatment tank 2 and the microorganism-fixed filter medium washing water is sunk by the action of a siphon. Can be mentioned. In this case, the operation control can be performed by providing an electric valve (not shown) and a controller (not shown) for operating the electric valve in the middle of the solid substance drawing pipe 10. By performing these solid discharge means, a water flow is generated in the direction opposite to the arrow a in FIG. 1, and the screen 7 is washed from the opposite direction.

By operating the above-mentioned collapse means for washing the microorganism-fixed filter medium 6 and the solid matter discharge means at predetermined time intervals, the ability of the microorganism-fixed filter medium 6 can be sufficiently exhibited, and a stable treatment can be performed at all times. It is possible to secure water quality.

In the first embodiment, an ultrasonic sensor is used as the thickness detection sensor. However, the present invention can be similarly implemented using an optical sensor or a motor load detection sensor.
In the first embodiment, a water detection sensor is used as the clogging sensor. However, the present invention can be similarly implemented using a flow rate sensor, a water level sensor, and a motor load detection sensor.

(Embodiment 2) FIG. 5 is an overall configuration diagram of a wastewater treatment apparatus according to Embodiment 2 of the present invention, and FIG. 6 is an enlarged view of a portion C thereof.

5 and 6, 2 is a treatment tank, 3 is an inflow pipe, 4 is an inner cylinder, 6 is a microorganism-fixing filter, 8 is a motor, 9 is a controller, 13 is a processing section, 14 is a sedimentation section,
Reference numeral 15 denotes an ultrasonic sensor, which is the same as that in the first embodiment, and is denoted by the same reference numeral and description thereof is omitted. 1a is a wastewater treatment apparatus according to Embodiment 2;
The purification drum 10a has a bottom surface inclined downward from the outer periphery to the inner periphery and is rotated by the motor 8. One end of the purification drum 10a is connected to the lower end of the purification drum 5a, and the other end is the treatment tank 2.
Is a solids discharge pipe provided outside the purifying drum 5.
a is connected to the solid discharge pipe 10a.
A bearing (not shown) is provided so that the can rotate. Reference numeral 11a denotes a pump disposed at a predetermined portion of the solid discharge pipe 10a, 16a denotes a flow sensor disposed outside the purification drum 5a and measures a flow rate of wastewater discharged from the screen 7 per unit area. , Propeller type, paddle type, flapper type and the like are used. Reference numeral 18 denotes a porous partition screen which is disposed inside the purification drum 5a and divides the inside of the purification drum into upper and lower parts. The wall surface of the purification drum 5a above the partition screen 18 is porous or mesh-like, and the wall surface of the purification drum 5a below the partition screen 18 is non-porous. Reference numeral 19 denotes a solid sedimentation part which is a lower side of the vertically separated purification drum 5a, 20 denotes a solid sedimented in the solid sedimentation part 19, 21 denotes one end opened at the bottom of the purification drum 5a and the other end partitioned. The drainage introduction pipe 22 opened at a predetermined position inside the purification drum 5a above the screen 18 is a partition screen 18
A plurality of protrusions protruding from the upper surface of the. The shape of the protrusion 22 can be a triangle, a trapezoid, a sphere, a rectangle, a square, or the like. The protrusion 22 may be provided anywhere on the upper surface of the partition screen 18.

Next, a method for treating wastewater in the wastewater treatment apparatus according to the second embodiment will be described.

The wastewater treatment method of the second embodiment is different from that of the first embodiment in that the microorganism-fixed filter medium 6 of the purification drum 5a becomes solid (captured non-dissolved) as the purification of the wastewater progresses. In order to prevent clogging caused by organic matter and generated excess sludge) in terms of the collapse means and the solid matter discharging means for washing the microorganism-fixed filter medium 6, and in that the flow rate sensor 16a is used as a clogging sensor. is there.

In the second embodiment, when performing the first to third collapse means described in the first embodiment, the microorganism-fixed filter medium 6
Since the solids 20 separated from the water can be separated by the partition screen 18 and settled in the solid sedimentation section 19, the solids 20 do not diffuse outside the purification drum 5a.
In addition, since the projections 22 are provided on the upper surface of the partitioning screen 18, solids are easily separated from the microorganism-fixing filter 6. Further, since the solid matter 20 can be accumulated in the solid sedimentation section 19, the solid matter discharging means can be performed after performing the collapse means a plurality of times, and the number of times of the solid matter discharging means can be reduced. it can. Further, the wastewater flowing into the purification drum 5a flows through a drainage introduction pipe 21 installed below the purification drum 5a by water pressure, flows in as shown by an arrow d, and then is discharged by centrifugal force as shown by an arrow e. It is done. Thus, in the second embodiment, the purifying drum 5a can be installed above the first embodiment, and the rotating shaft connecting the motor 8 and the purifying drum 5a can be shortened. As the solid discharge means, the first and second solid discharge means described in the first embodiment can be used. Further, by disposing the flow rate sensor, it is possible to detect that the layer of the microorganism-fixed filter medium 6 is closed and the flow rate of the permeated drainage is reduced.

Although the ultrasonic sensor is used as the thickness detecting sensor in the first embodiment, the present invention can be similarly implemented by using an optical sensor or a motor load detecting sensor.
Further, in the first embodiment, the flow rate sensor is used as the clogging sensor. However, the present invention can be similarly implemented using a water level sensor, a motor load detection sensor, or the like.

[0104]

As described above, the wastewater treatment apparatus according to the present invention has the following excellent effects.

According to the first aspect of the present invention, the insoluble organic matter can be removed, and a large solid material caught in the organic matter can be treated without the need for a lifting pump. ) Layer can always be kept uniform and the treated water quality can always be supplied even when the inflow load fluctuates. Therefore, the range of types of wastewater to be treated is expanded, and the initial cost and running cost can be reduced. It is possible to provide a wastewater treatment device with excellent safety.

According to the invention described in claim 2, according to claim 1
In addition to the effects described above, it is possible to efficiently remove solid substances attached to the microorganism-fixed filter medium, and to provide a wastewater treatment apparatus excellent in workability.

According to the third aspect of the present invention, the first aspect
In addition to the effects of the second aspect, since the microorganism-fixed filter medium washing water can be efficiently discharged without diffusing into the treatment tank, the initial cost and the running cost can be reduced.

According to the invention set forth in claim 4, according to claim 1,
In addition to the effects of any one of (3) to (3), it is possible to detect whether or not the layer of the microorganism-fixed filter medium is uniform without providing a new device, so that the initial cost can be reduced.

According to the fifth aspect of the present invention,
In addition to the effect of any one of Claims 1 and 4, since it is possible to detect whether the layer of the microorganism-fixed filter medium is uniform, wastewater can be used as an index for maintaining stable treated water quality. A processing device can be provided.

According to the sixth aspect of the present invention,
In addition to the effects of any one of claims 1 to 5, it is possible to detect whether the layer of the microorganism-fixed filter medium is non-uniform, and even if it is non-uniform, always stabilize the processing by stacking again. Since the water quality can be ensured, it is possible to provide a wastewater treatment device that does not deteriorate the environment such as a public river or sewer that discharges treated water.

According to the seventh aspect of the present invention,
In addition to the effect of any one of claims 1 to 6, it is possible to detect the state of clogging of the layer of the microorganism-fixed filter medium, and it is possible to always grasp the state of the microorganism-fixed filter medium. It is possible to provide a wastewater treatment device capable of reducing costs and running costs.

According to the eighth aspect of the present invention, in addition to the effect of any one of the first to seventh aspects, it is possible to detect the state of clogging of the layer of the microorganism-fixed filter medium, and it is possible to always detect the state of clogging. Since the state of the microorganism-fixed filter medium can be checked, it is possible to provide a wastewater treatment apparatus capable of reducing maintenance costs and running costs.

According to the ninth aspect of the present invention, in addition to the effect of any one of the first to eighth aspects, the clogging of the layer of the microorganism-fixed filter medium can be performed without providing a new device. It is possible to provide a wastewater treatment apparatus capable of detecting the situation and constantly grasping the situation of the microorganism-fixed filter medium.

According to the tenth aspect of the present invention, in addition to the effect of the third aspect, it is possible to discharge the microorganism-fixed filter medium washing water without diffusing into the treatment tank, and to clean the microorganism-fixed filter medium. Provided is a wastewater treatment apparatus capable of accumulating solids contained in water, reducing the number of times solids are discharged, and shortening the rotating shaft of the motor, thereby reducing running costs for the motor. It is possible to do.

According to the eleventh aspect of the present invention, in addition to the effect of any one of the first to tenth aspects, it is possible to detect the state of clogging of the layer of the microorganism-fixed filter medium, Since the state of the microorganism-fixed filter medium can be constantly grasped, it is possible to provide a wastewater treatment apparatus capable of reducing maintenance costs and running costs.

According to the twelfth aspect of the present invention, in addition to the effect of any one of the first to eleventh aspects, it is possible to detect the state of clogging of the layer of the microorganism-fixed filter medium, Even if clogging occurs suddenly due to inflow load fluctuations, it can be washed immediately and always ensure stable treated water quality. It is possible to provide a wastewater treatment device that does not deteriorate.

According to the thirteenth aspect of the present invention,
In addition to the effect of any one of claims 1 to 12, the drainage penetrates into the inside of the microorganism-fixed filter medium, and the action of purifying the microorganisms living in the inside of the microorganism-fixed filter medium can also be used. Provided is a wastewater treatment apparatus capable of improving the purification capacity (amount of organic matter removed), thereby reducing the amount of microorganism-fixed filter media, and also reducing the capacity of the purification drum, thereby reducing initial costs and running costs. Becomes possible.

According to the fourteenth aspect of the present invention, in addition to the effects of the first to thirteenth aspects, since the microorganism-fixed filter has continuous porosity and hydrophilicity, the drainage penetrates into the microorganism-fixed filter. In addition, the purification effect of microorganisms living inside the microorganism-fixed filter medium can be utilized, and the purification capacity (removal amount of organic substances) per unit area of the microorganism-fixed filter medium can be improved. It is possible to provide a wastewater treatment apparatus capable of reducing the capacity of the purification drum and reducing initial costs and running costs.

[Brief description of the drawings]

FIG. 1 is an overall configuration diagram of a wastewater treatment device according to a first embodiment of the present invention.

FIG. 2 is an enlarged view of a portion A in FIG.

FIG. 3 is a configuration diagram of another purification drum according to the first embodiment of the present invention.

FIG. 4 is a configuration diagram of another purifying drum according to the first embodiment of the present invention.

FIG. 5 is an overall configuration diagram of a wastewater treatment apparatus according to Embodiment 2 of the present invention.

FIG. 6 is an enlarged view of a portion C in FIG. 5;

FIG. 7 is a sectional view of a conventional wastewater treatment device.

FIG. 8 is a cross-sectional view of a main part of a centrifugal separation tube of a conventional wastewater treatment device, and is an operation explanatory diagram during purification

FIG. 9 is an explanatory diagram of a case where a filter medium in a centrifugal separation tube of a conventional wastewater treatment apparatus is washed.

[Explanation of symbols]

 Reference Signs List 1, 1a wastewater treatment device 2 treatment tank 3 inflow pipe 4 inner cylinder 5, 5a purification drum 6 microorganism-fixed filter medium 7 screen 8 motor 9 controller 10 solid extraction pipe 10a solid discharge pipe 11, 11a pump 12 outflow pipe 13 processing section Reference Signs List 14 sedimentation part 15 ultrasonic sensor 16 water detection sensor 16a flow rate sensor 17 scraping arm 18 partition screen 19 solid sedimentation part 20 solid matter 21 drainage introduction pipe 22 projection part 23 liquid ejecting device 24 liquid ejection nozzle 25 motor 26 clutch part 27 Centrifuge cylinder 28 Inner collar 29 Liquid extraction hole 30 Filter 31 Small hole 32 Filter medium 33 Connecting shaft 34 Push-up pump 35 Bath tub 36, 37 Water intake hole 38, 39 Piping pipe 40 Heat exchanger 41 Hose a, b, c, d, e Flow of drainage i Central axis where force works j Clearance

 ────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Tsuyoshi Yoshida 1006 Kazuma Kadoma, Kazuma, Osaka Matsushita Electric Industrial Co., Ltd. F term (reference) 2F069 AA46 BB40 GG06 GG07 GG09 2G047 AA01 BA03 BC02 BC18 4D003 AA10 DB05 EA03

Claims (14)

[Claims] 1. A processing tank, a rotating body provided in the processing tank and having a mesh-like or porous wall surface, a microorganism-fixed filter medium accommodated in the rotating body, and a motor for rotating the rotating body. A thickness detection sensor for detecting the thickness of the microorganism-fixed filter medium layer laminated on the wall surface of the rotating body and / or a clogging sensor for detecting a flow rate of drainage passing through the microorganism-fixed filter medium layer. And wastewater treatment equipment. 2. The drainage water according to claim 1, further comprising: a control unit for controlling the motor; and a collapse means for collapsing the microorganism-fixed filter medium laminated on the wall surface of the rotating body by centrifugal force. Processing equipment. 3. The wastewater treatment apparatus according to claim 1, further comprising a solid discharging means for discharging solids inside the rotating body. 4. A motor load detecting sensor according to claim 1, wherein said thickness detecting sensor is a motor load detecting sensor for detecting a load applied to a motor during rotation of said rotating body. Wastewater treatment equipment. 5. The apparatus according to claim 1, wherein said thickness detecting sensor is an ultrasonic sensor and / or an optical sensor.
The wastewater treatment device according to any one of claims. 6. The method according to claim 1, wherein the control section activates the collapse means when the thickness detection sensor detects that the thickness of the layer of the microorganism-fixed filter medium is equal to or greater than a predetermined value. The wastewater treatment device according to any one of claims 5 to 10. 7. The wastewater treatment apparatus according to claim 1, wherein the clogging sensor is a flow sensor that measures a flow rate of wastewater discharged from the rotating body. . 8. The wastewater treatment apparatus according to claim 1, wherein the clogging sensor is a water level sensor for detecting a water level in the processing tank. 9. The motor according to claim 1, wherein the clogging sensor is a motor load detecting sensor for detecting a load applied to a motor during rotation of the rotating body. Wastewater treatment equipment. 10. A mesh-like or porous partition plate disposed inside the rotating body and dividing the inside of the rotating body up and down, wherein the wall surface of the rotating body is mesh-like or porous above the partition plate. The wall surface of the rotating body is formed in a non-porous shape below the partition plate, and the solids discharging means has one end connected to the lower end of the rotating body and the other end. A solids discharge pipe that communicates with the outside to discharge solids together with the wash water; a pump or an electric valve that is disposed at a predetermined portion of the solids discharge pipe and that is controlled by the control unit; The wastewater treatment device according to claim 3, further comprising: a wastewater introduction part formed by forming the wastewater. 11. The wastewater treatment according to claim 1, wherein the clogging sensor is a water detection sensor that detects wastewater overflowing from an upper portion of the rotating body. apparatus. 12. The control section operates the collapse means and / or the solid matter discharge means when the clogging sensor detects that the flow rate of wastewater permeating the microorganism-fixed filter medium layer is equal to or less than a predetermined value. The wastewater treatment device according to any one of claims 1 to 11, wherein 13. The wastewater treatment apparatus according to claim 1, wherein the microorganism-fixed filter medium is formed in a continuous porous shape. 14. The method according to claim 1, wherein the filter medium for fixing microorganisms is made of cellulose having continuous porosity.
The wastewater treatment device according to any one of claims.