JPH11169879A - Organic waste water treating device and method therefor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To effectively treat an organic waste water. SOLUTION: A primarily treated water is introduced into a 2nd treating vessel 30. The 2nd treating vessel 30 is composed of a laminated structure of packed layers 34 each packed with a microorganism carrier and foamed glass layers 36 and air is supplied to the foamed glass layers 36. The packed layers 34 are kept aerobic by this way and an excellent aerobic biological treatment is applied to a permeated water in a 1st treating vessel. The 2nd treating vessel 30 is formed to be turned upside down by a motor 64. Then the 2nd treating vessel 30 is cleaned to recover the air permeability and water permeability and to perform excellent treatment by being turned upside down in a proper frequency and supplying water from the upside.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an organic wastewater treatment apparatus and method for treating organic wastewater, and more particularly to an apparatus and method using a packed bed filled with a microorganism carrier.

[0002]

2. Description of the Related Art Conventionally, a treatment using an aerobic microorganism has been widely used for treating organic wastewater. For example, activated sludge method is usually adopted in sewage treatment plants,
In the combined type septic tank, the activated sludge method and the immersion filter bed method are adopted.

Here, garbage discharged from homes and the like is separated and collected, and incinerated at a garbage incineration plant. However, with such a conventional disposal method, the labor and burden involved in transporting, collecting, and treating garbage are large, and incineration is not preferable from the viewpoint of effective use of resources and protection of the global environment. On the other hand, a disposer for pulverizing garbage has been conventionally known, and by using this disposer, garbage can be transported together with wastewater. Therefore, the user does not need to collect garbage, which is very convenient. However, when this disposer is used, there is a problem that the concentration of solids and organic matter in the wastewater becomes extremely high, so that the sewer pipe is easily clogged and the load on the septic tank and the sewage treatment facility becomes too large.

Further, there has been proposed an apparatus for treating wastewater containing crushed garbage in a home or an apartment house using the disposer. According to this device, a disposer can be used in each home, and there is no adverse effect on sewerage and the like.

For example, Japanese Patent Application Laid-Open No. 9-1117 discloses that
An apparatus for treating garbage-containing wastewater containing garbage crushed by such a disposer is shown. In this apparatus, garbage-containing wastewater flows into a solid processing section, where solids are decomposed and removed. Then, the primary treated water obtained in the solid processing section is introduced into a wastewater treatment tank, where it is subjected to aeration treatment. In this way, solid matter can be removed and aerobic biological treatment can be performed on wastewater containing garbage crushed by the disposer.

[0006]

In this apparatus, wastewater is aerated in a wastewater treatment tank, and the resulting aerated solution is discharged as treated water. Therefore, basically, the same treatment as the activated sludge method is performed. But,
The wastewater treatment tank described in this publication does not have a sedimentation tank large enough to precipitate solids in the aeration treatment liquid,
When the suspended solids concentration (MLSS) of the aeration treatment liquid is high, sufficient treatment cannot be performed.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and provides an organic wastewater treatment apparatus capable of effectively treating organic wastewater such as primary wastewater containing garbage from a disposer. The purpose is to do.

[0008]

SUMMARY OF THE INVENTION The present invention is an organic wastewater treatment apparatus for treating organic wastewater, comprising a packed bed filled with a microorganism carrier for treating the supplied wastewater with microorganisms.
It is characterized by having a container having the packed layer therein, and a flow direction reversing means for reversing a flow direction of drainage in the packed layer in the container.

[0009] The organic wastewater is supplied to a packed bed where it is brought into contact with the filler. In the packed bed, aerobic microorganisms adhere to and propagate on the filler, and the aerobic microorganisms oxidize and remove organic substances in the organic wastewater. And according to this invention, the distribution direction of waste water can be reversed. Therefore,
Sludge consisting of dead microorganisms clogged in the packed bed can be eliminated by the flow in the opposite direction by the one-way flow of the wastewater. Therefore, the processing can be continued for a long time.

Further, the invention is characterized in that the flow direction reversing means reverses the flow direction of the wastewater by reversing the vertical direction of the container. By turning the container upside down, the flow direction of the drainage to the packed bed can be reversed. For example, it is possible to reverse the flow direction of the wastewater in the packed bed while always flowing the wastewater through the packed bed as a downward flow. As the flow direction reversing means,
A configuration in which the intermediate portion of the container is rotatably supported, and the container is rotated about the fulcrum can be adopted. Further, as the flow direction reversing means, a configuration in which the container is detachably supported on the supporting member, the container is once removed, and the container is turned upside down may be adopted.

Further, the present invention is characterized in that the container is formed substantially symmetrically with respect to an intermediate portion of the container in the direction of drainage flow. Due to the symmetrical formation, the same processing can be performed even if the flow direction is reversed for the waste water.

Further, the present invention is characterized by further comprising a washing means for introducing washing water into the packed bed to wash the packed bed. As described above, by washing the packed bed, it is possible to eliminate the occurrence of clogging, recover the water permeability and the air permeability of the packed bed, and continue good treatment.

[0013] The present invention also relates to an organic wastewater treatment apparatus for treating organic wastewater, comprising a filler layer filled with a microbial carrier for filtering the supplied wastewater and treating the microorganism, and a filling layer for the microorganism. Washing means for introducing washing water into the washing tank to wash the packed layer. It is preferable that aerobic microorganisms be mainly propagated in the packed bed.

In addition, the container has the reversing mechanism for storing the packed bed in a container and for inverting the container up and down. Normally, the wastewater flows downward from above to discharge the treated water downward. In addition, at the time of washing by the washing means, the container is turned upside down, the treated water discharge side is turned up, and washing water is introduced from above to wash the packed bed.

As described above, by turning the container upside down,
Cleaning can be performed with the inflow side down, and effective internal cleaning can be performed. In addition, by performing the processing as it is after the cleaning, the inflow side can be periodically reversed, and more effective processing can be performed.

[0016] Further, it has an auxiliary layer for circulating wastewater discharged through the packed bed and a gas supply member for diffusing air or oxygen gas to the packed bed, and discharges treated water through the auxiliary bed. It is characterized by the following.

Thus, by supplying air to the packed bed, it is ensured that it is maintained in an aerobic state. Especially,
In this type, wastewater is circulated through the packed bed, and air is supplied to the inside. Therefore, sufficient oxygen is supplied, and suitable oxidative decomposition of organic substances by aerobic microorganisms is achieved.

Furthermore, since the treated water is discharged from the auxiliary layer, the treated water from the packed bed can be smoothly discharged to the outside. In other words, if the packed bed has high water retention (relatively poor water permeability), it is difficult to discharge the treated water to the outside, and the treated water cannot be discharged from the packed bed. Cheap. However, a material having better water permeability than the packed layer can be used as the auxiliary layer. by this,
An auxiliary layer that provides an intermediate atmosphere between the packed bed and the outside can be provided, so that the treatment water can be smoothly discharged from the packed bed. In particular, by providing the auxiliary layer below and adjacent to the packed bed, it is possible to smoothly discharge the treated water from the packed bed.

The present invention is characterized in that it has a multi-stage structure in which a plurality of the filling layers and the auxiliary layers are alternately laminated.
By providing a plurality of stages, short-circuiting of the water to be treated can be prevented, and the downward movement of the water to be treated can be made smooth.

[0020] The microorganism carrier of the packed bed is a wood chip. Wood chips are inexpensive, porous and water-absorbing. Therefore, it is suitable as a carrier for microorganisms. Therefore, by filling the wood chips in the filling layer, aerobic microorganisms that oxidatively decompose organic substances can be sufficiently retained here, and suitable decomposition of organic substances can be achieved.

Here, the microbial carrier of the packed bed preferably has a particle size of 2 to 5 mm. Increasing the particle size of a microbial carrier such as a wood chip improves drainage and makes clogging less likely to occur. However, if the particle size is too large, the effect of the treatment is reduced. This makes it possible to achieve long-term continuous treatment while maintaining the properties of the treated water at a sufficient level.

Further, it is preferable that the auxiliary layer has a two-layer structure, and that a layer farther from a layer closer to the filling layer of the auxiliary layer has better water permeability. As described above, by making the auxiliary layer a multilayer, the change in the atmosphere can be further gradually changed, and a smoother discharge of the permeation treatment liquid can be achieved.

In the case where the number of the auxiliary layer is one, the auxiliary layer thereof, and in the case of a plurality of the auxiliary layers, the auxiliary layer on the treated water discharge side at the last stage has at least a two-layer structure. It is preferable that the layer farther than the layer closer to the layer has better water permeability. With such a configuration, it is possible to effectively discharge the treated water.

It is also preferable to increase the porosity of a layer farther from the layer closer to the filling layer of the auxiliary layer, thereby improving the water permeability of the layer farther away. Depending on the porosity,
Water permeability can be easily set.

It is preferable that the lowermost auxiliary layer of the auxiliary layers has a structure in which the porosity gradually increases from a portion closer to the filler layer to a portion farther from the filler layer. Thus, by gradually changing the porosity in one layer,
Similarly, the permeation treatment liquid can be discharged smoothly.

It is preferable that the layer of the auxiliary layer remote from the filling layer is formed of a fibrous structure formed by entanglement of a large number of fibers. The fibrous component has a high porosity and good water permeability. Therefore, the inside of the auxiliary layer can be configured to gradually improve water permeability, and the treatment liquid can be discharged very smoothly. In this case, it is preferable that the layer close to the packed layer is formed of granular material, and the layer farther (the treated water discharge side) is formed of a fibrous material. Further, foamed glass is suitable as the granular material. In addition, it is preferable that the auxiliary layer other than the rearmost auxiliary layer has a three-layer structure of an upper layer, an intermediate layer, and a lower layer. In this case, the intermediate layer of the auxiliary layer may be configured to have a higher porosity than the upper layer and the lower layer disposed on both sides thereof.

It is also preferable that the intermediate portion (intermediate layer) of the auxiliary layer has a higher porosity than both side portions (upper and lower layers).

The organic wastewater to be treated is a primary treated water obtained by subjecting wastewater containing garbage from a disposer to a filtration treatment and an aerobic microorganism treatment in a primary treatment device. . The disposer is used to pulverize household garbage, and the waste water composed of the pulverized matter contains a large amount of organic matter. Therefore, when processing this, it is more efficient to separate and process relatively large solids. Therefore, the primary treated water from which a relatively large SS component has been removed together with some soluble organic substances by a filtration layer such as a wood chip is an organic wastewater containing many organic substances.
Such organic wastewater is effectively treated by the organic wastewater treatment device of the present invention.

Further, the organic wastewater to be treated further includes kitchen wastewater. By flowing in the kitchen wastewater, the kitchen wastewater can be treated, and the total organic matter discharge amount of the wastewater discharged from a home or the like can be reduced.

Further, the organic wastewater treatment method according to the present invention comprises:
An organic wastewater treatment method for treating organic wastewater, wherein the wastewater is circulated through a packed layer formed by filling a microorganism carrier, and the wastewater is treated with microorganisms. It is characterized by being inverted.

[0031]

Embodiments of the present invention (hereinafter referred to as embodiments) will be described below with reference to the drawings.

FIG. 1 is a view showing the overall configuration of a solid organic matter-containing wastewater treatment apparatus according to an embodiment of the present invention. In the apparatus of this embodiment, garbage-containing wastewater is treated as solid organic matter-containing wastewater. Disposers are provided at drains of household sinks, and garbage is crushed by the disposers. During use of the disposer, tap water is allowed to flow, and crushed garbage flows through the drainpipe while being dispersed in the water. In addition, when this apparatus is provided immediately below each household sink, a drain pipe is not required. The garbage-containing wastewater containing the crushed garbage flows into the first treatment tank 10 functioning as a primary treatment device. In addition, if it is the wastewater of the same property as such a garbage containing wastewater, the apparatus of this embodiment can perform suitable processing.

As shown in FIGS. 1 and 2, the first processing tank 10 has a rectangular container 12 having a hopper-like lower part and an open upper part. Then, a filling layer 14 is formed inside the container 12. This filling layer 14
Is filled with wood chips such as cedar sawdust and has a particle size of several mm (1.5 m in this embodiment).
m). Note that a porous plastic, a porous glass material, a mesh material, or the like may be used as long as a solid organic substance can be filtered, water can be retained, and microorganisms that decompose the organic substance are easily attached and grow. Further, by forming the filling layer 14 with a wood chip, a biodegradable plastic, or the like, it becomes possible to use this as compost when discarding. The filling layer 14 has a thickness of, for example, about 15 cm.

Under the filling layer 14, the foamed glass layer 1 functioning as an auxiliary layer (supporting layer for supporting the filling layer 14) is formed.
6 are provided. The foam glass layer 16 is formed by filling granular foam glass. Here, the particle diameter of the granular foam glass is about 5 mm, and the particle diameter is set to be larger than that of the wood chips forming the filling layer 14.
Therefore, the porosity of the foamed glass layer 16 is
Larger than. In addition, this granular foamed glass is obtained by crushing natural glass-based rock and firing and foaming at high temperature.
Those used as materials for preventing root rot of plants and improving soil are suitable. The foam glass layer 16 has a thickness of, for example, about 10 cm.

Below the foam glass layer 16, there is provided a fibrous component layer 18 which also functions as an auxiliary layer.
The fibrous constituent layer 18 has a greater roughness than the foamed glass layer 16 and has a higher porosity.
As the fibrous constituent layer 18, a mat-like one formed by entanglement of hard plastic fibers having a wire diameter of about 0.5 mm is employed. For example, among mat materials used as a filtering material for water in an aquarium of an aquarium fish, coarse mat materials and the like are preferable.

Below the fibrous component layer 18, a corrugated sheet material 20 for collecting and discharging the primary processing liquid is provided. This corrugated sheet material 20 is arranged toward the drain port 22,
Drainage is easy to flow downward. The fibrous constituent layer 18 has a thickness of, for example, about 2 to 3 cm.
This corrugated sheet material 20 may be considered as a part of the auxiliary layer.

Further, the bottom of the container 12 has a constant depth in the longitudinal direction, and a drain port 22 is provided at the bottom. Note that the container 12 may be slightly inclined in the longitudinal direction, and the drainage port 22 may be arranged at the lowest part.

Further, a plowing device 24 is provided in the surface portion of the filling layer 14 for reversing the same. In this embodiment, a paddle-shaped device is shown as the plowing device 24. The turning device 24 may rotate or may reciprocate. The plowing device 24 may be of any type, such as a device that moves while pressing a rake-like or comb-shaped device against the surface layer so that the surface layer portion is not hardened.

When garbage-containing wastewater flows into the first treatment tank 10, crushed garbage, which is a solid matter, is filtered and separated by the packed bed 14. On the other hand, the liquid component passes through the filling layer 14, the foam glass layer 16, and the fibrous constituent layer 18. Then, the processing liquid that has passed through the fibrous constituent layer 18 flows through the valley of the corrugated sheet material 20 and reaches the center, and the processing liquid is dropped and stored in the reserve tank 26 below the drainage port 22. You.

Further, compressed air is supplied to the reserve tank 26 from an air pump 28, and the primary processing liquid stored in the first processing tank 10 is aerated here. You. Thereby, it can prevent that it rots in the reserve tank 26.

Here, the filler of the filling layer 14 is a wood chip, which is a porous material having a water absorbing ability and a large surface area. Further, since there is a gap between the particles, the inside of the filling layer 14 is maintained in an aerobic state. Moreover, the solid matter filtered and separated in the packed bed 14 and the organic matter in the liquid component are rich in organic matter in the packed bed 14. Therefore, the filler functions as a microorganism carrier, and aerobic microorganisms propagate in the filling layer 14. Therefore, the solid matter (crushed garbage) separated and held in the packed bed 14 and the soluble BOD component in contact with the filler are decomposed by the aerobic microorganisms. In particular, a wood chip is very suitable as a carrier for microorganisms.
4, a sufficient amount of microorganisms can be retained, and thus sufficient treatment can be performed.

In particular, the first processing tank 10 of the present embodiment has a foam glass layer 16 made of granular foam glass below the filling layer 14. The granular foam glass of the foam glass layer 16 is porous like the wood chips of the filling layer 14, but the particle size is set to be larger than that of the wood chips. When such a filling layer 14 and a foam glass layer 16 are laminated, the difference in atmosphere between the two layers is relatively small. Therefore, the liquid component that has descended by gravity in the filling layer 14 moves smoothly to the foam glass layer 16. Therefore, it is possible to effectively prevent clogging from occurring in the lower portion of the filling layer 14. In particular, the packed layer 1 of the present embodiment
No. 4 has a large flat area and is shallow. Therefore, the liquid is smoothly discharged downward. Furthermore, since an appropriate amount of microorganisms is also held in the foam glass layer 16, the soluble BOD can be further removed here while maintaining sufficient water permeability.

For example, when the filling layer 14 is directly supported, the air is next to the filling layer 14 of the wood chips, and it is difficult for the liquid component to escape from the filling layer 14 at this interface due to the surface tension of water. Then, a region having high moisture is generated at the bottom of the filling layer 14. And in such an area, it becomes anaerobic and rot occurs, and clogging is further promoted. According to the present embodiment, such disadvantages can be eliminated.

Further, in the present embodiment, a fibrous component layer 18 made of a fibrous mat material is provided below the foamed glass layer 16. This fibrous component layer 18 is also a porous layer and contacts the foamed glass layer 16 to a considerable extent. Therefore, the movement of the liquid here is also smooth.

Then, the liquid component from the fibrous constituent layer 18 is discharged to the outside via the corrugated sheet member 20, so that the liquid component here can be smoothly moved. As described above, according to the first processing tank of the present embodiment, the downward movement of the liquid is very smooth as a whole. For this reason, it is possible to suppress the generation of a region having a high water content at the bottom of the filling layer 14, and it is possible to effectively prevent rot and clogging from occurring here. Then, the BOD component is effectively removed by the aerobic microorganisms growing on the filling layer 14 and the foam glass layer 16. Therefore, the solid organic matter-containing wastewater containing the crushed garbage discharged from the disposer can be effectively treated for a long period of time.

The reversing device 24 scrapes the surface of the filling layer 14 in order to prevent clogging on the surface, and does not stir and mix the entire filling layer 14. The reversing device 24 can prevent clogging of the surface layer and promote the downward movement of the liquid component and the ventilation from the surface.

If the air supply member is attached to the first treatment tank 10, aerobic decomposition can be promoted, and the water content (40-80%) suitable for solid matter decomposition can be adjusted, and clogging can be prevented. Useful.

In the first processing tank 10, the processed primary processing liquid is stored in the reserve tank 26. Then, in the apparatus of the present embodiment, the first processing tank 30 functioning as the secondary processing apparatus includes the first processing tank 30.
The primary processing liquid of the processing tank 10 is further processed.

As shown in FIGS. 1 and 3, the second processing tank 30 of this embodiment has a structure in which three packed layers 34 are stacked in a cylindrical container 32. The foamed glass layer 36 functioning as an auxiliary layer is disposed below. That is, in the container 32, the fibrous constituent layer 48a
The foam glass layer 36 and the filling layer 34 are arranged under the four layers, and the foam glass layer 36 and the fibrous constituent layer 48b are arranged thereunder. Therefore, the arrangement in the container is
It is vertically symmetric. Here, the first filling layer 34 includes
The same wood chips as the filling layer 14 of the processing tank 10 are filled. The foamed glass layer 36 includes a foamed glass layer 16.
Is filled with the same granular foam glass. The fibrous constituent layers 48a and 48b have the same configuration as the fibrous constituent layer 18 of the first processing tank 10.

An air pipe 38 is connected to the foam glass layer 36, and the other end of the air pipe 38 is connected to the air pump 28. Therefore, the compressed air from the air pump 28 passes through each foamed glass layer 36 and passes through each packed layer 3.
4 and so on.

Also, at the top and bottom of the container 32,
A water collecting device 46 is provided, and a trumpet-shaped pipe 50 reaching the outside of the container 32 is connected to the water collecting device 46. An opening 42a of a primary treatment liquid supply pipe 42 connected to the reserve tank 26 via a water pump 40 is disposed above the upper trumpet-shaped pipe 50, and the primary treatment liquid in the reserve tank 26 is The first filling layer 34 is supplied from above. In addition, a drain pipe 44 is connected to the bottom of the container 32, from which treated water is discharged. In addition, the trumpet-like pipe 5 of the drain pipe 44
Immediately below 0, a water collecting part 45 whose upper part is open is arranged.

Here, the sprinkling water collecting device 46 at the upper portion sprays and supplies the supplied primary treatment liquid toward the surface of the filling layer 34. The lower water sprinkling device 46 collects and discharges the treated water flowing down. This sprinkling water collecting device 46
It may be cylindrical or donut-shaped, with a hole in the bottom surface, or may be configured to overflow from the upper edge.

It is also preferable to dispose a clogging preventing layer above the uppermost filling layer 34 and below the lowermost filling layer 34. This clogging prevention layer has a particle size of 2 m from below.
m, 3 mm, 5 mm layer of wood chips, for example 5 cm
Thickness.

The opening 4 of the primary processing liquid supply pipe 42
A valve 52 is arranged on the path leading to 2a, and tap water can be supplied to the opening 42a via a valve 54. Therefore, the primary treatment liquid can be supplied to the second treatment tank 30 by opening the valve 52 and closing the valve 54, and the tap water can be supplied to the second treatment tank 30 by closing the valve 52 and opening the valve 54. .

Further, the drainage pipe 44 is also branched into two, so that treated water can be discharged through a valve 58 and washing wastewater can be returned to the first treatment tank 10 through a valve 60.

The intermediate portion of the container 32 has a rotating shaft 6
2, a motor 64 is connected. A rotary joint 66 is provided at an intermediate portion of the air pipe 38. Therefore, by driving the motor 64, the container 32 can rotate around the rotation axis,
The container 32 can be turned upside down.

In this configuration, when the water pump 40 is driven to supply the primary processing liquid in the reserve tank 26 to the second processing tank 30, the primary processing liquid is supplied to the fibrous constituent layer 48a in the container 32. Is sprayed over the entire surface of the water through the water collecting device 46. Then, the four-stage foam glass layer 36 and the three-stage filling layer 34 are lowered. Thereby, the packed layer 3
4 is brought into contact with the wood chips. On the other hand, the air from the air pump 28 is supplied to the inside of the second processing tank 30, and the inside of the filling layer 34 is maintained in an aerobic state. Therefore, the aerobic microorganisms adhere to and propagate on the wood chips in the packed layer 34, and effectively oxidatively decompose the BOD component contained in the primary treatment liquid in the first treatment tank 10 that descends. In particular, wood chips are woody and porous, and are very suitable as carriers for aerobic microorganisms. Therefore,
In the second treatment tank 30, effective aerobic microorganism treatment is achieved. Furthermore, wood chips have the advantage of being inexpensive.

Each of the filling layers 34 is made of a foamed glass layer 36.
Supported by. This foam glass layer 36 is made of granular foam glass. This granular foam glass,
As in the case of the above-described first treatment tank 10, it has a function of effectively discharging the liquid from the wood chips downward. Thus, clogging in each of the filling layers 34 can be prevented.

Further, the second processing tank 3 in the present embodiment
Numeral 0 is longer than the first processing tank 10 and has a multi-stage configuration. Then, the liquid that has passed through the filling layer 34 is dispersed in the foamed glass layer 36 to which air is supplied, and reaches the next filling layer 34. Therefore, the permeated treatment water supplied from the upper part is surely treated without causing a short circuit. The air is supplied into the foam glass layer 36 having a relatively high porosity. Therefore, the foamed glass layer 36 functions as an air diffusion member, and efficient aeration of the entire inside of the second processing tank 30 can be achieved. Further, the air is supplied to the foam glass layers 36 of each stage. Therefore, a larger amount of air is supplied to the upper side in contact with the liquid having a high BOD concentration, and effective processing can be performed.

Here, the filling layer 34 in the second processing tank 30
The greater the number of stages of the foamed glass layer 36, the better the processing effect, but practically three or four stages. Also, the filling layer 34
It is also possible to insert an air diffuser into the air outlet from which air is diffused. In this case, the air diffuser may be inserted vertically or horizontally. For example, it is preferable to insert a vertical air diffuser in the center of the second processing tank 30. further,
In the second processing tank 30, only the foamed glass layers 36 and the filling layers 34 are alternately formed in layers, and no partition walls or the like are formed on the way. Further, the air pipe 38 is only opened slightly from the side wall of the container 32 to the inside. Therefore, it is easy to take out the wood chips and the foamed glass forming the inner filling layer 34 and the foamed glass layer 36. These are preferably replaced periodically. In this case, the wood chips or the like may be taken out from above, but it is also preferable to provide a takeout window or the like below the container 32.

The second processing tank 30 includes the first processing tank 1
Permeated treated water at 0 is supplied. This permeated water contains a considerable amount of SS components, and the second treated tank 3
On the surface portion of 0, clogging is likely to occur. In the present embodiment, since the filler layer 34 is provided under the relatively coarse fibrous constituent layer 48a and the foamed glass layer 36, the occurrence of clogging on the surface portion is prevented, and good processing is continued for a long time. it can.

In this embodiment, the motor 6
At 4, the container 32 is periodically inverted. As described above, even if clogging of the surface portion is prevented, the layer on the inflow side has a higher load and is more likely to be clogged. By inverting the container 32, the treated water discharge side becomes the inflow side, and the inflow side becomes the treated water discharge side. Then, in this state, the container 32
By supplying water from the top of the container and washing the inside of the container 32,
SS components accumulated in each layer are washed away with the water stream,
Breathability and water permeability are restored.

That is, when it becomes necessary to perform the cleaning, the valve 52 is closed, and the flow of the processing liquid in the first processing tank 10 into the second processing tank 30 is stopped. In this state,
By driving the motor 64, the container 32 is inverted. And
The valve 58 is closed, the valve 60 is opened, and the valve 5 is closed.
4 is opened, and the inside of the container 32 is washed. When the predetermined cleaning is completed, the valves 54 and 60 are closed and the valve 5
2, 58 are returned to return to the normal processing. Thereby, clogging can be eliminated and effective processing can be continued.

The motor 64 can be changed to various driving mechanisms such as an air actuator. Further, the timing of the inversion and the cleaning may be determined by monitoring the discharge state of the treated water. Further, the washing wastewater is returned to the first treatment tank 10, but may be discharged outside the system.

Although illustration is omitted, in the present embodiment, a heater is provided around the containers 12 and 32, and the temperature is set in the first and second processing tanks 10 and 30. A thermometer to measure is arranged. The on / off of the heater is controlled so that the temperature in the first and second processing tanks 10 and 30 does not become 30 ° C. or lower. In this way, by controlling the temperature, the activity of the microorganisms in the processing tanks 10 and 30 can always be maintained at a sufficient level.
In addition, in the processing tanks 10 and 30, an organic matter oxidative decomposition reaction of aerobic microorganisms occurs. Therefore, there is also internal heat generation, and the normal temperature is higher than the outside air temperature. Therefore, heating is often unnecessary. In addition, the primary low temperature condition has few problems, and since 30 ° C. is not always the limit temperature, the heater capacity does not need to be large enough to guarantee 30 ° C. or more.

It is also preferable to use oxygen gas or air with an increased oxygen content (oxygen-rich air) instead of air as the gas to be supplied to the processing tank or the like.

Further, the filling layer 34 and the foam glass layer (auxiliary layer) 36 may be at least one pair, and the lowermost layer may not be the foam glass layer 36. That is, the filling layer 34 may be provided below the foamed glass layer 36, and the treated water may be discharged from the lowermost filling layer 34.

"Installation Location of Apparatus"
As described above, the processing tanks 10 and 30 are basically provided. Then, the wastewater containing the crushed garbage from the disposer provided at the drain of the household sink is treated. Therefore, the device of the present embodiment can be accommodated in the space below the kitchen sink. Further, the apparatus of the present embodiment can be installed outdoors. In this case, the pipe of the present apparatus may be connected from the disposer. This plumbing
It is preferable that the wastewater containing the crushed garbage can be transported by gravity.

[Modification of Apparatus] As described above, the apparatus of the present embodiment processes wastewater containing crushed garbage from the disposer. However, the disposer does not need to be provided separately from the apparatus, and may be formed integrally. That is, a disposer is integrally formed above the first processing tank 10 to receive the garbage discharged from the sink, crush and reprocess the garbage, and
It can be configured to flow into. Such a disposer-integrated device is preferably provided immediately below the sink, but may be installed outdoors so that the garbage flows into the disposer formed with the device together with water.

“Size of Wood Chips” In the above embodiment, the filling layers 14 of the first processing tank 10 and the second processing tank 30
34 wood chips having a particle size of about 1.5 mm (mostly 2 mm or less) were used. Here, an experiment was conducted by changing the particle size of the wood chips. According to this experiment, the larger the particle size of the wood chips, the more the packed bed 1
The permeability of the wastewater at 4, 34 increases. And, by using wood chips having a particle size of about 2 to 5 mm as the wood chips used for the packed layers 14 and 34 of the first processing tank 10 and the second processing tank 30, while maintaining the processing capacity for a long time, It was found that the quality of the treated water could be maintained at a predetermined level.

[Structure of Foamed Glass Layer (Auxiliary Layer)] In place of the foamed glass of the foamed glass layers 16 and 36, it is preferable to use a wood chip. That is, the foamed glass layer 1
The layers 6 and 36 function as auxiliary layers for indicating the filling layers 14 and 34. However, these layers may be made of wood chips of the same material as the filling layers 14 and 34 (however, the particle size is not Layers are larger than packed layers). Wood chips have water retention and can provide the same processing effects as foamed glass. And by using wood chips,
When this is discarded, it can be used as compost. Note that biodegradable plastics and the like can also be used.

The auxiliary layer of the first processing tank 10 and the second processing tank 3
The lowermost auxiliary layer of 0, as described above, as a multilayer of the foamed glass layer and the fibrous constituent layer, adopts a material having a larger porosity as it goes down, so that the permeation treatment liquid can be discharged smoothly. it can. The same effect can be obtained by increasing the porosity substantially gradually or stepwise downward as one layer.

[Structure of First Processing Tank 10] As described above,
The first processing tank 10 includes a fibrous component layer 18, a foam glass layer 16, and a filling layer 14 from below. Then, experiments were carried out with these thicknesses changed. By this experiment, 7
The filling layer 14 using wood chips having a particle size of 1.7 mm to 5 mm (a main component of which is 2 mm or more) has a thickness of 5 mm or more.
It has been found that it is preferable to fill about 10 cm to about 10 cm. At this time, the foam glass layer 16 is preferably about 3 to 5 cm.

[Removal of Sludge from Primary Treatment Liquid] In the above embodiment, the reserve tank 26 for storing the primary treatment liquid is used.
, An aeration treatment was performed to prevent spoilage. But,
With this configuration, the primary processing liquid is basically kept in the second processing liquid as it is.
It will be introduced into the processing tank 30. The primary processing liquid has a considerable amount of SS (floating solids), and if this is directly introduced into the second processing tank 30, clogging is likely to occur in the second processing tank 30.

Therefore, it is preferable that the sludge in the primary treatment liquid is settled and separated by stopping or weakening the aeration in the reserve tank. Then, the sludge separated and settled is returned to the first treatment tank 10. Accordingly, the amount of SS introduced into the second processing tank 30 is reduced, and the occurrence of clogging in the second processing tank 30 is prevented, so that long-term stable processing can be performed.

Further, according to this configuration, the settled sludge is
It is processed again in the first processing tank 10. Therefore, it is not necessary to provide a special sludge treatment device or the like. The settled sludge does not necessarily need to be returned to the first treatment tank 10. If the sludge can be disposed outside, the sludge may be directly discharged outside the system.

Further, it is also preferable that the primary treatment liquid obtained in the first treatment tank is filtered with a filter to partially remove the SS component before flowing into the second treatment tank 30. Thereby, the occurrence of clogging in the second processing tank can be effectively prevented.

This filter may be provided in front of the reserve tank 26, in the reserve tank 26, after the reserve tank, in the piping, or further, in the inlet of the primary treatment liquid of the second treatment tank 30. It may be provided. And this filter includes cloth-like filter material such as gauze (for example,
Asahi Chemical's trade name "Bencott" or a stainless sieve can be used. The sieve is preferably about 83 mesh (wire diameter: about 0.12 mm, mesh size: about 0.18 mm square).

It is preferable that the filter is periodically cleaned or replaced, and the cleaning water is supplied to the first treatment tank 1.
It may be returned to 0.

[Configuration of Second Processing Tank 30] Second Processing Tank 30
For example, when the flow velocity is increased, the treated water BOD is increased, and when the flow velocity is decreased, the treated water BOD is decreased. When the height of the second treatment tank 30 is increased, the treated water SS becomes smaller, and when the height is decreased, the treated water SS becomes larger. Therefore, by adjusting the flow velocity and height of the second processing tank 30,
The treated water BOD and SS can be controlled. The required water quality for the BOD and SS of the treated water often differs depending on local governments and the like. In this apparatus, the required water quality of the treated water is adjusted by adjusting the flow velocity and height of the second treatment tank 30. be able to. The height of the second processing tank 30 can be changed by changing the inflow position of the primary processing liquid, changing the number of stages, changing the outlet, and the like.

It is also preferable to treat kitchen wastewater other than the garbage-containing wastewater that has been crushed by the disposer in the second treatment tank 30. That is, kitchen wastewater flows into the second treatment tank 30 directly or via a storage tank such as the reserve tank 26. As a result, kitchen wastewater can be treated, and the overall organic matter discharge amount of wastewater discharged from homes and the like can be reduced.

"Cartridge type second processing tank" Packed layer 3
4 and the foam glass layer 36 are preferably collected in a pack.
That is, the filling layer 34 and the foamed glass layer 36 are housed in a vinyl net or an elastic tube, and are taken out of the container 32 at an appropriate frequency, replaced with a new one, or washed and returned. Can be.

The removed filling layer 34 is
It is also preferable to use the compost as the filling layer 34 and replace it with new wood chips.

For such replacement, the container 32
It is also preferable to make the upper and lower portions of the container 32 openable, or to divide the container 32 in the vertical direction and open it.

[0085]

EXPERIMENT 1 "Experiment conditions" As processing tanks corresponding to the first processing tank 10,
A plastic water tank (20 × 30 × 20 cm) was prepared, and a 5 cmφ hole was formed in the bottom thereof to serve as a drain port. And as a support material layer (auxiliary layer), granular foam glass (grain of about 5 mm), filter material made of ceramics (hollow hexagon of about 1 cm square), gravel (particle diameter of about 1 cm), fibrous composition (wire) (A mat-like shape in which hard plastic fibers having a diameter of about 0.5 mm are entangled), and a wood chip is filled thereon. That is, as shown in Table 1, A
The tank is wood chips on 3 kg of ceramic filter material, the tank B is wood chips on 1.5 kg of ceramic filter material, the tank C is 1.5 kg of ceramic filter material, and the wood chips on foam glass (3 cm thick).
Tank D is a ceramic filter medium 1.5 kg, wood chips on 2 kg of gravel, and tank E is a 2 cm thick fibrous structure, foamed glass 1
The wood chips were directly filled with the wood chips on the cm thickness, and the F tank was directly filled with the wood chips. In addition, 1.4 kg of wood chips having a water content of about 70% were used.

[0086]

[Table 1] Then, 1 kg of garbage is placed in each of the processing tanks A to F.
2 L (liter: hereinafter, liters are represented by L) of the garbage-containing wastewater generated by disposing with a disposer is introduced at a rate of 2 L per day, and the change of the SS (floating solid) component of the wastewater and the change of the color of the wood chips are measured. Examined.

[Results] BOD of garbage-containing wastewater input
Was 3500 mg / L and SS was 2800 mg / L. FIG. 4 shows the change in SS of the primary treatment liquid when the wastewater was charged at 2 L / day. As described above, in the F tank, the SS concentration of the permeation treatment water is reduced to about 100 mg / L from an early stage. Here, the lower SS concentration of the permeated water means that clogging has occurred accordingly. In this F tank, clogging occurred earlier, and the color of the wood chips at the bottom of the packed bed was black brown. From ocher to
Corruption has also begun.

On the other hand, in the C and E tanks, the SS concentration is 500 to
It was as high as 1000 mg / L, and the water permeability was good. No rot occurred.

In the tanks A, B and D, the SS concentration of the permeated water was about 500 mg / L, and was intermediate between the tank F and the tanks C and E. However, clogging began to occur in these A, B, and D tanks at the end of the experiment.

From these, it can be seen that the presence of the support material layer (auxiliary layer) is important for preventing the occurrence of clogging. In particular, by providing a support layer (auxiliary layer) of granular foam glass,
It turns out that it is very effective in preventing the occurrence of clogging.

Table 2 shows the quality of the permeated water after 20 injections.

[0092]

[Table 2] As described above, the SS concentration was high in the tanks C and E, but the SS concentration was extremely low due to clogging in the tank F. A, B, D
In the tank, the SS concentration is decreasing, and it is predicted that clogging will occur as the operation continues.

Experiment 2 As shown in FIG.
A wood chip was packed in a column having a height of 345 mm and a processing tank 60 corresponding to the second processing tank 30 was formed. Then, 5 mL of a broth medium having a COD (chemical oxygen demand using potassium permanganate) of 12,500 mg / L was charged into the treatment tank 60, and carrier water (0.
(85% NaCl aqueous solution) at 2.07 mL / min. This carrier water was supplied from the carrier water tank 62 to the processing tank 60 by the peristaltic pump 64. Then, the treated water was collected by the fraction collector 66 and the change with time was observed. The fraction collector 66 was 3.5 minutes / column. In run 1, the carrier water was passed without aeration, and in run 2, the carrier water was aerated by supplying air from the air pump 68 to the carrier water tank 62.

FIG. 6 shows the result. Thus, ru
In n1, the peak value of the COD of the treated water is about 190 mg / L, and in run2, the peak value of the COD of the treated water is 140 m
g / L. This shows that the aeration promotes the removal of COD.

Experiment 3 In the same device as in Experiment 2, BOD1
3.5m drainage of 900mg / L, SS300mg / L
Water was passed at L / min for 5 hours a day (1 L a day). As a result, treated water with a BOD of 450 mg / L and an SS of about 60 mg / L was stably obtained.

Experiment 4 146 mm diameter processing tank (second
(Corresponding to treatment tank 30), granular foam glass (thickness 3 cm)
And wood chips (5 cm thick) were alternately laminated in four layers to form a tank having a height of 500 mm. Note that a fibrous component layer is disposed below the lowermost foamed glass layer. In addition, air was supplied to each layer of the granular foam glass from the side. The same wastewater as in Experiment 3 was passed through this treatment tank at 35 mL / min for 5 hours a day. Thereby, SS50mg /
About L and about 200 mg / L BOD were obtained stably.

[0097] From these Experiments 2 to 4, it can be seen that suitable processing can be performed by the second processing tank 30 of the present embodiment.

Experiment 5 The following experiment was performed using the system shown in FIG. 25% of garbage of 1.25 kg of garbage and 25 liters of water, and garbage-containing wastewater crushed by a disposer are charged daily (1.25 kg of garbage / 25 L of water / day)
Processing was performed. The water quality of the crushed liquid is BOD3500mg /
L, SS3300 mg / L.

The first processing tank 10 has an outer size of 35 ×
Two 60 cm pieces are prepared, and a total of 10 kg of wood chips are filled as the filling layer 14, and 1 kg of foamed glass is filled.
Degree filled. 70% or more of the wood chips of the filling layer 14 have a particle size of 1.7 mm or more (the main component is 2 mm or more). Table 3 shows the particle size distribution of the wood chips. The thickness of the filling layer 14 was about 5 to 10 cm, and the thickness of the foam glass layer (auxiliary layer) 16 was about 3 to 5 cm.

[0100]

[Table 3] As a result of this treatment, a BOD of 2000 mg / L and a SS of 1000 mg / L
L was obtained. As shown in FIG. 7, the total weight (T-Wt) of the first processing tank 10 is 35 at the beginning of use.
From about 10 kg, it increased to about 52 kg in 10 days, to about 55 kg in 20 days, and then gradually increased until 100 days, and reached about 60 kg in 100 days. After 100 days, the rate of weight increase increases, and 1
On the 10th, it rose to about 65 kg. From this, it was found that the processing can be continued without clogging for at least about 100 days under the conditions like this time.

Further, the primary processing solution obtained in the first processing tank 10 was supplied to the second processing tank 30, and a processing experiment was performed. Two second processing tanks 30 having an outer dimension of 18 cm in diameter × 32 cm in height were prepared. Therefore, the total area is
508 cm ² . The water flow rate was 60 mL / min, and the air flow rate was 60 L / min. Further, as the filling layer 34, wood chips having a chip diameter of 2 mmφ or more were selected and used by sieving wood chips having the same particle size distribution as those used in the first treatment tank 10. In addition, the filling layer 34, the foam glass layer 3
Sample No. 6 had a thickness of 5 cm, and three layers were laminated.

As a result, water having a BOD of about 200 mg / L and SS of about 50 mg / L was stably obtained as the treated water in the second treatment tank 30 for 70 days or more. Also, n in the treated water
Hexane-extracted substances were also sufficiently low at about several mg / L.

The waste water containing garbage obtained by crushing the garbage with the disposer is processed using the first processing tank 10 and the second processing tank 30 to obtain a BOD of 200 m.
It was found that treated water of about g / L and SS of about 50 mg / L can be stably obtained. Further, as a result of the analysis, it was found that nitrogen was removed in the second processing tank 30. That is, from the comparison of the total nitrogen concentration of the influent water and the treated water in the second treatment tank 30,
% Nitrogen removal was achieved. From this, this device
It was also confirmed that the removal of nitrogen was effective.

[0104]

As described above, according to the organic wastewater treatment apparatus according to the present invention, organic matter in wastewater can be effectively decomposed by aerobic microorganisms while filtering the organic wastewater. In particular, by washing the inside with water, SS components that cause clogging can be discharged, and water permeability and air permeability can be restored. Further, by turning the apparatus upside down, the cleaning effect can be increased, and the efficiency of the subsequent processing can be increased. Also, by the auxiliary layer below the packed layer,
It is possible to smoothly discharge the permeation treatment liquid in the packed bed, and thereby to prevent the occurrence of clogging of rot in the packed bed. In addition, by using a wood chip as a microorganism carrier of the packed bed, the amount of microorganisms retained in the packed bed can be made sufficient, and the aerobic biological treatment can be effectively performed, and the suitable treatment can be continued for a long period of time. . Furthermore, by providing a multilayer structure of the filling layer and the auxiliary layer, and further providing a plurality of both layers, short-circuiting can be prevented and clogging can be prevented, so that effective processing can be performed. Further, by supplying air to the auxiliary layer and performing aeration, it is possible to perform aerobic biological treatment with higher performance.

[Brief description of the drawings]

FIG. 1 is a diagram schematically showing a configuration of a solid-containing wastewater treatment device including an organic wastewater treatment device according to an embodiment, as viewed from the front.

FIG. 2 is a diagram schematically showing the inside of a first processing tank.

FIG. 3 is a view schematically showing the inside of a second processing tank.

FIG. 4 is a diagram showing the results of processing experiments using various support material layers (auxiliary layers).

FIG. 5 is a diagram schematically showing a configuration of an experimental apparatus.

FIG. 6 is a view showing an experimental result.

FIG. 7 is a diagram showing a change in weight of a first processing tank.

[Explanation of symbols]

10 first treatment tank, 12 vessels, 14 packed bed, 16
Foam glass layer, 18 fibrous constituent layers, 20 corrugated sheet material, 2
2 drainage port, 24 reversing device, 26 reserve tank, 30 second treatment tank, 32 container, 34 packed bed, 3
6 Foam glass layer, 64 motors.

Claims (11)

[Claims] 1. An organic wastewater treatment apparatus for treating organic wastewater, comprising: a packed bed filled with a microbial carrier for treating a supplied wastewater with microorganisms; a container incorporating the packed bed; And a flow direction reversing means for reversing the flow direction of the wastewater in the packed bed. 2. The organic wastewater treatment apparatus according to claim 1, wherein the flow direction inverting means reverses the flow direction of the wastewater by inverting the container up and down. 3. The organic wastewater treatment apparatus according to claim 1, wherein the inside of the container is formed substantially symmetrically with respect to an intermediate portion of the container in the flow direction of the wastewater. 4. The apparatus according to claim 1, further comprising a washing unit for introducing washing water into the packed bed to wash the packed bed. apparatus. 5. An organic wastewater treatment apparatus for treating organic wastewater, wherein the microorganism carrier is filled, the supplied wastewater is filtered, and a microorganisms-treated packing layer is provided. An organic wastewater treatment apparatus, comprising: a washing means for introducing and washing a packed bed. 6. The apparatus according to claim 1, wherein an auxiliary layer that circulates waste water discharged through the packed bed, and a gas supply that diffuses air or oxygen gas into the packed bed. An organic wastewater treatment apparatus, comprising: a member; and discharging treated water via an auxiliary layer. 7. The organic wastewater treatment apparatus according to claim 6, wherein the organic wastewater treatment apparatus has a multi-stage configuration in which a plurality of the packed layers and the auxiliary layers are alternately stacked. 8. The organic wastewater treatment apparatus according to claim 1, wherein the microorganism carrier in the packed bed is a wood chip. 9. The apparatus according to claim 1, wherein the organic wastewater to be treated is a wastewater containing garbage from a disposer, which is subjected to filtration and aerobic treatment in a primary treatment apparatus. An organic wastewater treatment device, which is primary treated water obtained by biological treatment. 10. An organic wastewater treatment apparatus according to claim 1, wherein the organic wastewater to be treated further includes kitchen wastewater. 11. An organic wastewater treatment method for treating organic wastewater, comprising: flowing wastewater through a packed layer formed by filling a microorganism carrier, treating the wastewater with microorganisms, and removing wastewater in the packed layer. An organic wastewater treatment method, wherein the flow direction of the organic wastewater is appropriately reversed.