JPH05253595A - Apparatus for treating organic waste - Google Patents

Abstract

PURPOSE:To highly purify org. waste within a short time by biological treatment operation by providing an anaerobic filter bed tank anaerobically treating org. waste with anaerobic bacteria and a biological membrane filter tank retreating the treated matter from the anaerobic filter bed tank with aerobic bacteria. CONSTITUTION:In an org. waste treatment apparatus 50, a charging port 2 of org. waste is provided to one end of the upper surface of a container 1 and an anaerobic filter bed tank 3 performing anaerobic treatment by bacteria possessed by org. waste itself is formed under the charging port 2. Further, first and second biological membrane filter tanks 4, 5 performing aerobic treatment are provided so as to communicate with the anaerobic filter bed tank 3 to constitute a biological treatment tank consisting of three tanks in total. Further, the sedimentation chamber 6 communicating with the second filter tank 5 and separating sludge from biologically treated water and the treated water tank 7 communicating with the sedimentation chamber are provided and a treated supernatant solution is discharged from a discharge port 7a.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an organic waste treatment device for purifying organic waste including biological waste.

[0002]

2. Description of the Related Art Organic waste such as domestic sewage or garbage contains a large amount of high-concentration organic matter-rich nutrient inorganic salts, and these substances are discharged untreated to rivers, lakes, seas, etc. In addition, it leads to water pollution due to lack of oxygen, spoilage, or abnormal growth of algae.

Conventionally, the discharged organic waste is collected by a local government or the like and is processed by incineration or the like by a large-scale processing facility, and the cost associated therewith is enormous.

[0004] In recent years, a so-called food waste treatment device, which utilizes the purifying action of microorganisms contained in organic waste, has also been used on a trial basis. However, the amount of sludge after decomposition is large and recovery is difficult. Since it is necessary, there is a drawback that the processing device requires a vast area and the processing time is long.

[0005]

SUMMARY OF THE INVENTION An object of the present invention is to provide a device capable of highly purifying such organic waste by biological treatment operation in a short time.

[0006]

The present invention is directed to an anaerobic filter tank for anaerobically treating an input organic waste with an anaerobic microorganism, and a treated product treated with the anaerobic filter tank with an aerobic microorganism. It is an organic waste processing apparatus provided with the 1st and 2nd biofilm filtration tanks which are reprocessed.

[0007] Here, in the anaerobic filter bed tank, it is possible to provide a microorganism-implantation layer in which a plurality of synthetic resin nets formed in a lattice shape are vertically laminated.

Further, the porosity of 35 to 4 is provided in the biofilm filtration tank.
An air supply mechanism may be provided which forms a microbial implantation layer filled with porous ceramics having a size of 5% and a size of 4 to 20 mm, and further supplies air to the microbial implantation layer.

Further, it is possible to provide a settling chamber for settling the sludge of the biologically treated product, and to provide a circulation mechanism for returning the sludge in the settling chamber to the anaerobic filter bed tank.

[0010]

[Function] The organic waste introduced into the organic waste treatment device is first treated in the anaerobic filter bed tank, and then reprocessed in the biofilm filter tank, and the treatment using the nature of the organic waste which is originally perishable. Efficient processing in a short time is possible.

At this time, by forming a microbial implantation layer filled with porous ceramics in the biofilm filtration tank,
It becomes possible to attach and grow aerobic microorganisms in a high concentration on this microbial implantation layer, and in combination with the action of air ejected from the air supply mechanism, purification by aerobic microorganisms (partly anaerobic microorganisms) Processing is accelerated.

Further, since the circulation mechanism for returning the sludge to the anaerobic filter bed tank is provided, sludge does not accumulate in the sedimentation chamber.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is a plan view showing an organic waste treatment apparatus of the present invention, FIG. 2 is a side view of the same, and FIG.
4 is a sectional view taken along line BB of FIG. 2, and FIG. 5 is a sectional view taken along line CC of FIG.

The organic waste treatment apparatus 50 has an input port 2 for crushed organic waste at one end of the upper surface of the container 1, and the lower part of the input port 2 is anaerobically treated by microorganisms contained in the organic waste itself. The anaerobic filter bed tank 3 is used. Further, the first and second communicating with the anaerobic filter bed tank 3 to perform aerobic treatment
The biological membrane filtration tanks 4 and 5 are provided, and the biological treatment tanks having a total of three tanks are provided. 6 is a settling chamber which communicates with the second filtration tank 5 and separates sludge from the biologically treated treated water, and 7 which communicates with the settling chamber 6 for discharging the treated supernatant from the outlet 7a. It is a treated water tank. Further, the anaerobic filter bed tank 3, the first biofilm filtration tank 4, the second biofilm filtration tank 5, and the precipitation chamber 6
Partition walls 8a to 8g are formed between the and treated water tanks 7, respectively.

The anaerobic filter bed tank 3 is for effectively primary treatment of organic waste which is originally perishable, and the anaerobic filter bed tank 3 has a high concentration of anaerobic microorganisms implanted therein. In order to maintain the microorganism-implanted layer 9 in which a plurality of synthetic resin nets formed in a lattice shape are vertically laminated, the introduction space 10 is provided above.
And the lower reservoir 11 is provided. The organic waste put into the anaerobic filter bed tank 3 is 1 to 10 μm by the crusher D.
When pulverized to about m, biological treatment with anaerobic microorganisms can be performed more effectively.

The first biofilm filtration tank 4 for the secondary treatment is provided with an upper inflow space 12 for inflowing sewage and a lower reservoir 13 of a considerable depth provided below, between which a block-like structure is formed. The microbial implantation layer 14 filled with the porous ceramics 14a is formed. Furthermore, on the bottom surface of the microorganism implantation layer 14,
An air blowing bed 16 is provided to supply the air introduced from the introduction pipe 15 to the entire surface of the microbial implantation layer 14 in order to promote the activation of the purification action of the aerobic microorganisms that have been implanted.

The lump-shaped porous ceramics 14a for forming the microbial implantation layer 14 has a porosity of 35 to 45.
%, The specific surface area is larger than that of conventional reactors, and
A 20 mm non-uniform size ceramic mass was used. In order to implant aerobic microorganisms for purification, this lump-shaped porous ceramics 14a should be of a non-uniform size to form a passage through which sewage freely passes between the ceramic lumps 14a. is necessary.

The lower reservoir 13 of the first biofilm filtration tank 4 plays the role of a buffer for the separated biofilm and the sediment to temporarily stay when advancing to the next, and is further generated by aeration from the air blowing bed 16. In the water stream, the action of stirring and decomposing the biofilm and the precipitate is simultaneously performed.

The second biofilm filtration tank 5 for thirdly treating the treated water secondarily treated in the first biofilm filtration tank 4 is
A sewage introduction chamber 17 and a treated water reservoir 18 for accumulating treated water are provided above and below it, and a microbial implantation layer 19 in which the remaining space is filled with massive porous ceramics 19a similar to the first biofilm filtration tank 4 Is provided. Further, as with the first biofilm filtration tank 4, an air blowing bed 21 for blowing up air from the introduction pipe 20 for introducing air is provided on the bottom surface of the microorganism implantation layer 19. Here, the microbial implantation layer 19 in the second biofilm filtration tank 5 is formed to be bulkier than the microbial implantation layer 14 in the first biofilm filtration tank 4,
This is because the biological treatment is carried out at a higher level.

22 is formed in each chamber of the biofilm filtration tank 4 divided into two compartments, and the primary treated water of the lower pool 11 is
The introduction path for leading to the inflow space 12 above the biofilm filtration tank 4 is shown. In this case, as shown in FIG. 4, each introduction path 22 is formed in a semicircular shape so as to prevent a large amount of the primary processed material from advancing into the secondary processing tank at one time, and the flow path cross section is narrowed. It is better to have a different structure.

Further, 23 is formed between the double partition walls 8c and 8d between the first biofilm filtration tank 4 for performing the secondary treatment and the second biofilm filtration tank 5 for performing the tertiary treatment. The treated water in the lower reservoir 13 of the second biofilm filtration tank 5 is used as the second biofilm filtration tank 5
The transfer space for transfer to the introduction chamber 17 above is shown.

Advection of the treated water from the second biofilm filtration tank 5 to the precipitation chamber 6 is carried out by an inlet provided at the lowest position of the partition wall 8e between the second biofilm filtration tank 5 and the precipitation chamber 6. 24. Further, the introduction of the treated water into the treated water tank 7 formed at the final position is provided between the precipitation chamber 6 and the treated water tank 7,
This is performed by the transfer space 25 of the double partition walls 8f and 8g whose upper side and lower side are opened.

Reference numeral 26 is an air introduction pipe for air lift which communicates with a compressor C for discharging compressed air provided outside the apparatus, and 27 is opened in the lower part of the sedimentation chamber 6 so that sedimented sludge is anaerobic filter bed tank at any time. It is a sludge return pipe returned to 2. As a result, the sludge in the settling chamber 6 is sucked up and transferred to the anaerobic filter bed tank 3 together with the air. In addition, 28 is the advection port of the excess inflow water provided in the upper part of the partition walls 8a-8e.

In the organic waste treatment device having the above structure,
The biological treatment of organic waste is performed as follows.

1 introduced from the inlet 2 of the anaerobic filter bed tank 3
The organic waste pulverized to about 10 μm is first subjected to anaerobic fermentation in the anaerobic filter bed tank 3. At that time, the implantation of anaerobic microorganisms is promoted by the microbial implantation layer 9 of the lattice-shaped synthetic resin net filled in the anaerobic filter bed tank 3, and the anaerobic treatment is efficiently performed.

The primary treated water of the lower reservoir 11 part that has been subjected to the primary treatment with anaerobic microorganisms is subjected to the first biofilm filtration through the introduction passage 22 that connects the anaerobic filtration tank 3 and the first biofilm filtration tank 4. It is guided to the inflow space 12 above the tank 4.

The primary treated water that has flowed into the first biofilm filtration tank 4 is then subjected to aerobic treatment with aerobic microorganisms as a secondary treatment. As described above, since the primary treatment with the anaerobic microorganism is performed before the secondary treatment with the aerobic microorganism, the dissolved organic matter and the solid organic matter are reductively decomposed and the load thereof is reduced.

Further, in the first biofilm filtration tank 4, biological treatment is aerobically carried out by the aeration from the filled granular porous ceramics 14a and the air blowing bed 16 below the ceramics 14a. .. First
The granular porous ceramics 14a filled in the biofilm filtration tank 4 has a structure suitable for adhering and proliferating microorganisms at a high concentration as described above. Due to the high concentration of biofilm, continuous food production is carried out and physical filtration is also carried out, and the purification power and the treatment capacity are remarkably increased.

The treated water that has been secondarily treated in the first biofilm filtration tank 4 is further aerobic organism of a higher degree due to the biofilm of the porous ceramics 19a filled in the second biofilm filtration tank 5. Processing is performed.

The treated water which has been highly purified by the biological treatment tank consisting of the anaerobic filter bed tank 3, the first biofilm filter tank 4 and the second biofilm filter tank 5 is further downstream in the precipitation chamber. The biofilm that has been advected to 6 and has separated off becomes sludge in the precipitation chamber 6 and precipitates. The sludge that has settled is circulated and returned to the anaerobic filter bed tank 3 for primary treatment by the installed sludge return pipe 27 as needed. Therefore, the generated sludge does not accumulate in the settling chamber 6,
Maintenance is unnecessary for a long period of time. Further, the treated water in which the sludge has settled passes through the transfer space 25, moves to the treated water tank 7 at the end, and is discharged to the outside as a treated supernatant liquid from the drain port 7a provided at the upper end.

As described above, in the organic waste treatment apparatus of the present invention, the perishable organic waste is first treated in the anaerobic treatment tank, and the treated water which is primarily treated in the anaerobic treatment tank is subjected to biofilm filtration. Perform secondary and tertiary treatments in the tank. Therefore, it is possible to efficiently purify the organic waste that is originally perishable. In addition, the biofilm filtration tank is filled with granular porous ceramics that adheres and proliferates aerobic microorganisms at a high concentration as a filter material, so biological treatment by a high concentration of aerobic microorganisms and physical filtration are efficient. It will be carried out. Further, although the entire apparatus is relatively small, the processing speed of organic waste is greatly improved, and if it is about the level of general household organic waste, it becomes possible to carry out purification treatment in about 1.5 to 2 hours.

The specific conditions and effects of treating organic waste discharged in a general household using the above apparatus will be described below.

1 kg of food waste discharged from a general household
It was crushed to about 5 μm with a crusher, and 4 l of tap water was added thereto and mixed. This organic wastewater has a BOD of 6.864 mg.
/ L, COD was 9.867 mg / l, and pH was 6.2.

When this organic waste water was put into the above apparatus and treated for 90 minutes, the water quality after treatment was BOD of 6.4 mg.
/ L, COD was 11.1 mg / l, the BOD removal rate was 99.9%, and the COD removal rate was 99.8%. Further, the solid organic matter in the device also remained constant and did not increase.

[0035]

According to the present invention, the following effects can be obtained.

The primary treatment with anaerobic microorganisms and the secondary treatment with aerobic microorganisms enable efficient and sophisticated treatment.

By forming the microorganisms-implanted layer filled with the porous ceramics, aerobic microorganisms can be attached and proliferated at a high concentration, and the biological treatment capacity can be significantly improved.

Since the treatment efficiency is excellent, it can be applied to the treatment of various animal carcasses.

Water can be purified in about 2 hours after the introduction of the organic waste.

Since the sludge that has settled is returned to the anaerobic filter bed tank, sludge does not accumulate in the settling chamber, and maintenance is facilitated.

[Brief description of drawings]

FIG. 1 is a schematic plan view showing an organic waste treatment device of the present invention.

FIG. 2 is a schematic side view of the organic waste treatment device shown in FIG.

3 is a cross-sectional view taken along the line AA of FIG.

FIG. 4 is a sectional view taken along line BB of FIG.

5 is a cross-sectional view taken along the line CC of FIG.

[Explanation of symbols]

1 container, 2 organic waste input port, 3 anaerobic filter bed tank, 4
First biofilm filtration tank, 5 second biofilm filtration tank, 6
Settling chamber, 7 treated water tank, 7a outlet, 8a to 8g partition wall, 9 microorganism implantation layer, 10 introduction space, 11 lower reservoir, 12 inflow space, 13 lower reservoir, 14 microorganism implantation layer, 14a porous ceramics, 15 Introduction pipe, 1
6 air blowout floor, 17 sewage introduction chamber, 18 treated water reservoir, 19 microorganisms landing layer, 20 introduction pipe, 21 air blowout floor, 22 introduction path, 23 transfer space, 24 introduction port, 25 transfer space, 26 air introduction pipe, 27 Sludge return pipe, 28 Overflow water admission port

Claims (8)

[Claims] 1. An anaerobic filter bed tank that anaerobically treats the input organic waste by anaerobic microorganisms, and a biofilm filter tank that re-treats the treated material treated by the anaerobic filter bed tank with aerobic microorganisms. An organic waste treatment device equipped with. 2. A biofilm filtration tank for a first treatment for secondary treatment.
2. The organic waste treatment device according to claim 1, comprising the biofilm filtration tank according to claim 1 and a second biofilm filtration tank for tertiary treatment. 3. The organic waste treatment apparatus according to claim 1, wherein a microbial implantation layer is formed in the anaerobic filter bed tank by vertically stacking a plurality of lattice-shaped synthetic resin nets. 4. The organic waste treatment device according to claim 1, wherein a microorganism implantation layer filled with porous ceramics is formed in the biofilm filtration tank. 5. The organic waste treatment device according to claim 4, further comprising an air supply mechanism for supplying air to the microorganism implantation layer. 6. The porous ceramic has a porosity of 35 to 4
The organic waste treatment device according to claim 4, which is a ceramic mass having a size of 5% and a size of 4 to 20 mm. 7. The organic waste treatment device according to claim 1, further comprising a settling chamber for settling sludge of the biologically processed product. 8. The organic waste treatment device according to claim 7, further comprising a circulation mechanism for returning the sludge in the settling chamber to the anaerobic filter bed tank.