JP4667910B2 - Waste treatment method and equipment - Google Patents

Description

  The present invention relates to the treatment of wastes (including various wastewaters) containing pollutants such as nitrogen, and in particular, comprises two or more treatment systems including a treatment system for electrolytic treatment of wastes, and together with the pollutants The present invention relates to a waste processing method and processing equipment for effectively processing odor components generated in a waste processing process.

In liquid organic wastes such as human waste, septic tank sludge, garbage, livestock manure, SS (floating matter), nitrogen, phosphorus, BOD (biochemical oxygen demand), COD (chemical oxygen demand) )) And other pollutants that adversely affect the human body, and various methods for removing these have been developed and put into practical use.
Liquid organic waste is mainly treated by solid or liquid separation of SS, oxidative decomposition of BOD and COD, removal of inorganic nutrients such as phosphorus and nitrogen compounds, and treatment of sludge solids alone or in combination. Is called.
As a general liquid organic waste treatment, for example, in the case of a liquid organic waste treatment facility such as a sludge recycling treatment center, after pretreatment of the accepted liquid organic waste and removing impurities, The entire amount is put into a biological treatment facility such as a nitrification denitrification treatment facility, and after processing BOD and TN (total nitrogen) contained in liquid organic waste, it is separated into solid and liquid by membrane separation, Further, a method is adopted in which the membrane is separated from the system by separation with aggregated membrane, activated carbon treatment or the like.

  Although a method for biologically treating organic waste is widely used, it is necessary to maintain the inside of the treatment tank at an appropriate condition because the biological treatment is a treatment utilizing the decomposition action of microorganisms. Therefore, it is important to sufficiently consider the properties of the organic waste to be treated, the content ratio of the contained contaminants, and the like. In equipment for processing various organic wastes in an integrated manner, processing is performed by appropriately combining devices suitable for each processing target. For example, in Patent Document 1 (Japanese Patent Laid-Open No. 2001-62495), human waste and septic tank sludge are dehydrated to biologically treat the separated liquid, and surplus sludge generated in the biological treatment and organic waste such as garbage are treated with methane. A treatment method comprising two treatment lines to be fermented is disclosed. In the biological treatment, since it is necessary to maintain the C / N ratio (organic matter / nitrogen ratio) to be treated at a value at which denitrification is efficiently performed, conventionally, it is necessary to add an easily decomposable organic matter such as methanol. there were. Therefore, Patent Document 1 proposes a configuration in which the fermented sludge after methane fermentation is solubilized and returned to biological treatment as an easily decomposable organic substance. This reduces or eliminates external input of methanol or the like.

  However, conventional liquid organic waste treatment facilities are mainly biological treatments that require a hydraulic residence time of several days (about 5 to 10 days), and this tank capacity is the site area of the facility. Due to the large proportion, it was difficult to make the facility compact when the entire amount of the received material was put into biological treatment. In particular, as in Patent Document 1, when a waste having a high proportion of soluble pollutants such as human waste and a waste having a high proportion of solid pollutants such as septic tank sludge are treated simultaneously, Since the entire amount of the treated waste is put into the biological treatment, the biological treatment tank, the solid-liquid separation device and the advanced treatment equipment in the subsequent stage are enlarged, and it is difficult to make the whole facility compact. In particular, when membrane separation is employed in the solid-liquid separator, there is a problem that the membrane area increases and maintenance costs such as membrane replacement increase.

Patent Document 2 (Japanese Patent Application Laid-Open No. 2004-202484) discloses a method for performing denitrification by electrolytic treatment. Although Patent Document 2 is not intended for integrated treatment, it is possible to reduce the burden on biological treatment by not providing biological treatment by providing a physicochemical denitrification treatment called electrolytic treatment. And
However, as a problem in the case of adopting electrolytic treatment, there is a problem that exhaust gas generated in the treatment process has very strong oxidizing power and contains chlorine, ozone or the like which has an influence on the human body. Furthermore, hypochlorous acid or the like may remain during the electrolytic treatment, and it is difficult to discharge the electrolytically treated water to public water areas without any post-treatment.

  On the other hand, another problem in the treatment of all wastes including waste water is generation of odor. Gases generated in the waste receiving tank, storage tank, and treatment process include acid gases such as hydrogen sulfide and methylcaptans, basic gases such as ammonia and amines, and neutral gases such as aldehydes. A malodorous component is contained. Since these odorous gases cause pollution, it is necessary to remove them in the processing facility. Conventionally, the generated odor gas is collected, the malodorous component is removed by a deodorizing device, and the concentration is reduced to a reference value or less, and then released into the atmosphere. Examples of the deodorizing device include a biological deodorizing method, a chemical solution cleaning method, an activated carbon adsorption method, and the like. The biological deodorizing method forcibly passes odorous gas containing malodorous components through the biological layer and converts it into a substance having no odor. The chemical solution cleaning method is a method of neutralizing with a chemical solution such as acid or alkali, or a method of cleaning with an oxidizing agent such as sodium hypochlorite.

JP 2003-53395 A JP 2004-202484 A

  In view of the above-mentioned problems of the prior art, the present invention enables compact decommissioning, space saving and efficient denitrification in the treatment of waste including two or more treatment systems. An object of the present invention is to provide a waste treatment method and treatment equipment capable of effectively deodorizing generated odor gas.

The present invention proposes a technique for integrally treating liquid waste having a high percentage of soluble pollutants such as human waste and liquid waste having a high percentage of solid pollutants such as septic tank sludge.
As an example, human waste and septic tank sludge will be described as examples. As shown in Table 1 below, there is a clear difference in the component ratio. Here, the collected urine to be processed by the processing equipment is one that is collected by a vacuum car after the discharged human urine, papers, toilet drainage etc. are stored in the toilet tank for a certain period of time. The collection septic tank sludge is the cleaning sludge pumped up by the vacuum truck when cleaning the septic tank. Generally, the collection septic tank sludge is characterized by a lower concentration and a larger fluctuation range than the collected urine ( Reference: Planning and design procedures for facility development such as sludge regeneration treatment center National Urban Cleaning Council 2001/09).

Generally, it is known that the collected urine has a high content of soluble pollutants, and the collected septic tank sludge has a high content of solid pollutants. If organic wastes having different properties are treated in the same treatment system in this way, it leads to an increase in the size of biological treatment equipment, solid-liquid separation equipment, etc., and a reduction in treatment efficiency. Therefore, in the present invention, two or more treatment systems are used. We propose a waste treatment method and treatment equipment that can be made compact and space-saving by combining them effectively, and that can improve the treatment efficiency.
Therefore, in order to solve the above problems, the present invention treats waste that combines liquid waste with a high content of soluble pollutants and liquid waste with a high content of solid pollutants. In the method
A first treatment system comprising a biological treatment step of biologically treating a liquid waste having a high content of the soluble pollutant, and an advanced treatment step of advanced treatment of the biological treatment liquid after the biological treatment;
A second treatment system comprising a solid-liquid separation step for solid-liquid separation of a liquid waste having a high content of the solid contaminant, and an electrolytic treatment step for electrolytic treatment of the separated liquid-liquid separation,
It is characterized in that at least a part of the electrolytic treatment liquid generated in the electrolytic treatment step is introduced into the advanced treatment step after direct or reduction treatment.

According to the present invention, only liquid waste with a high content of soluble pollutants is biologically treated, and liquid waste with a high content of solid pollutants is subjected to electrolytic treatment after solid-liquid separation. Since the load on the biological treatment tank is greatly reduced, and the solid-liquid separation equipment in the subsequent stage can be downsized, the entire facility is greatly downsized.
In addition, the electrolytic treatment solution generated in the electrolytic treatment step is combined in the advanced treatment step and processed simultaneously, so that hypochlorite ions, ozone, or the like slightly remaining in the electrolytic treatment solution, or OH・ Active oxygen such as (hydroxy radicals) can partially decompose COD, chromaticity components and other contaminants in the separation liquid in the first treatment system, reducing the load in the advanced treatment process, flocculants and activated carbon The amount used can be reduced.
Furthermore, the treatment liquid in the first treatment system can be sterilized by active oxygen such as hypochlorite ions, ozone, OH, etc. remaining in the electrolytic treatment liquid, and the disinfection equipment ( (Not shown) can be reduced or made unnecessary.
The liquid waste having a high content of the soluble pollutant includes, for example, human waste and livestock manure. Examples of the liquid waste containing a high content of the solid pollutant include septic tank sludge.
In addition, if active oxygen at a level that adversely affects the subsequent treatment remains during the electrolytic treatment, the reduction treatment is performed by a method such as adding sodium thiosulfate as a reducing agent, and then introduced into the subsequent treatment. May be.

Further, in the second treatment system, a second biological treatment step for biologically treating the electrolytic treatment solution directly or after a reduction treatment is provided after the electrolytic treatment step,
The biological treatment liquid generated in the second biological treatment step is introduced into the advanced treatment step.
In the present invention, by providing a second biological treatment step in the second treatment system, even when a slight amount of nitrogen, BOD, etc. remains in the electrolytic treatment solution, these pollutants are reliably discharged. It is possible to reduce to the following, and it is not necessary to increase the size of the apparatus in the biological treatment process and solid-liquid separation process of liquid waste with a high content of the soluble pollutant, so that the entire facility can be made compact. Can do.

The first treatment system further includes a sludge separation step for solid-liquid separation of the biological treatment liquid generated in the biological treatment step, and a dehydration step for dewatering the separated sludge separated from the sludge. The dehydrated separation liquid generated in this way is introduced into the electrolytic treatment step.
As a result, it is not necessary to flow a dehydrated separation liquid having a low pollutant concentration into the biological treatment process, and the apparatus can be further downsized in the biological treatment process and the sludge separation process.
In this case, the separated sludge is mixed with liquid waste having a high solid pollutant content, and in the solid-liquid separation step of the second treatment system, solid-liquid separation is performed and dehydration is performed simultaneously. May be introduced into the electrolytic treatment process, whereby the dehydrating apparatus can be unified and the apparatus can be made compact.
Furthermore, at least a part of the electrolytic treatment solution generated in the electrolytic treatment step of the second treatment system is introduced directly or after reduction treatment into the biological treatment step of the first treatment system. .
According to this, since the electrolytic treatment liquid discharged from the electrolytic treatment process is introduced into the biological treatment process, nitrogen content and BOD remaining slightly in the electrolytic treatment liquid are simultaneously reduced in the biological treatment process. Can be removed.

Further, as a reference invention of the present invention, in a waste treatment method comprising two or more treatment systems,
One treatment system includes an electrolytic treatment process for electrolytic treatment of waste water,
A deodorizing step for collecting odorous gas generated in these treatment systems and removing odorous components of the odorous gas;
The electrolytic exhaust gas generated in the electrolytic treatment step is introduced into the deodorization step, and the electrolytic exhaust gas and the odor gas are brought into air contact with each other in the deodorization step.
As another reference invention of the present invention, in a waste treatment method comprising two or more treatment systems,
One treatment system includes an electrolytic treatment process for electrolytic treatment of waste water,
A deodorizing step for collecting odorous gas generated in these treatment systems and removing odorous components of the odorous gas;
The electrolytic treatment liquid generated in the electrolytic treatment step is introduced into the deodorization step, and the electrolytic treatment solution and the odor gas are brought into gas-liquid contact in the deodorization step.

  According to these inventions, in the deodorization step, the collected odor gas and the electrolytic exhaust gas or the electrolytic treatment liquid are included in the electrolytic exhaust gas or the electrolytic treatment liquid by bringing them into air contact or gas-liquid contact. The concentration of odor components in the odor gas can be reduced by the action of chlorine, ozone, etc., and the deodorization equipment for treating the odor of the entire facility can be made compact. At this time, the chlorine and ozone contained in the electrolytic exhaust gas or the electrolytic treatment liquid are simultaneously rendered harmless in the deodorizing step, so that an apparatus for treating them can be dispensed with.

Moreover, it is preferable to introduce ozone in the said electrolytic treatment process or upstream from this electrolytic treatment process.
By electrolytically treating ozone-containing water in this manner, OH is generated, and it is possible to decompose endocrine disrupting chemical substances such as PCB and dioxin with respect to wastewater, and as odor treatment, ammonia, It is possible to decompose organic acids (acetic acid, propionic acid, butyric acid, valeric acid), methylcaptan, etc., which are difficult to decompose, from hydrogen sulfide.
Further, the odor gas is an odor gas containing a large amount of an ammonia component. Since the reaction between ammonia and chlorine is very fast, the present invention can be effectively applied to odor gas containing a large amount of ammonia components such as composting equipment.
Furthermore, the odor gas is an odor gas containing a large amount of sulfur-based odor components. This is because hydrogen sulfide is converted into sulfuric acid by oxidation by ozone and is absorbed into wastewater, so it is converted into odorous gas containing a large amount of sulfur-based odorous components such as waste receiving / pretreatment equipment and excess sludge storage tanks in biological treatment. In contrast, the present invention can be effectively applied.

In addition, in waste treatment facilities that process liquid waste with a high content of soluble pollutants and liquid waste with a high content of solid pollutants,
Biological treatment equipment for biological treatment of liquid waste having a high content of soluble pollutant, sludge separation equipment for separating biological treatment liquid sludge generated in the biological treatment equipment, and sludge separated sludge separation liquid A first processing system including an advanced processing facility for advanced processing,
A second treatment system including a solid-liquid separation facility for solid-liquid separation of a liquid waste having a high content of the solid pollutant, and an electrolysis apparatus for electrolytically treating the solid-liquid separated liquid. Prepared,
An introduction line is provided for introducing at least a part of the electrolytic treatment solution generated in the electrolysis apparatus directly or after reduction treatment into the advanced treatment facility.

Further, in the second treatment system, a second biological treatment facility for biologically treating the electrolytic treatment solution directly or after reduction treatment is provided at a subsequent stage of the electrolysis device,
The biological treatment liquid generated in the second biological treatment facility is introduced into the advanced treatment facility.
Furthermore, a dehydrator for dewatering the separated sludge generated in the sludge separation facility of the first treatment system is provided, and the dehydrated separation liquid generated in the dehydrator is introduced into the electrolysis apparatus. In this case, the separation sludge in the sludge separation facility is mixed with the liquid waste having a high solid pollutant content, and a device having a dehydration function is provided in the solid-liquid separation facility of the second treatment system, The mixture may be dehydrated with a solid-liquid separation facility, and this separated solution may be introduced into the electrolyzer.
Furthermore, at least a part of the electrolytic treatment solution generated in the electrolysis apparatus of the second treatment system is directly or directly reduced, and then introduced into the biological treatment facility of the first treatment system. .

As a reference invention of the present invention, in a waste treatment facility comprising two or more treatment systems,
One treatment system includes an electrolyzer that electrolyzes waste water,
Odor gas generated in these treatment systems is collected through a duct, and equipped with a deodorizing device that removes odor components of the odor gas,
The deodorizing device is configured to introduce electrolytic exhaust gas generated in the electrolytic device and bring the electrolytic exhaust gas and the odor gas into air contact in the device.
Furthermore, in waste treatment facilities consisting of two or more treatment systems,
One treatment system includes an electrolyzer that electrolyzes waste water,
Odor gas generated in these treatment systems is collected through a duct, and equipped with a deodorizing device that removes odor components of the odor gas,
The deodorizing apparatus is configured such that an electrolytic treatment liquid generated in the electrolytic apparatus is introduced, and the electrolytic treatment liquid and the odor gas are brought into gas-liquid contact in the apparatus.
Moreover, it is preferable to introduce ozone into the electrolysis apparatus or upstream from the electrolysis apparatus.

As described above, according to the present invention, since a plurality of processing systems are effectively combined into a composite processing method, equipment can be made compact and space-saving can be achieved, and processing efficiency can be improved.
In addition, since it is configured to perform electrolytic treatment, the burden on biological treatment can be reduced, and the odorous components can be efficiently removed by using the electrolytic treatment liquid and electrolytic exhaust gas generated in the electrolytic treatment for deodorization. Is possible.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the drawings. However, the dimensions, materials, shapes, relative arrangements, and the like of the components described in this embodiment are not intended to limit the scope of the present invention unless otherwise specified, but are merely illustrative examples. Not too much.
Examples of wastes to be treated in this embodiment include liquid wastes that contain a large amount of soluble pollutants such as human waste and livestock manure, and liquid wastes that contain a large amount of solid pollutants such as septic tank sludge, Solid waste such as garbage and livestock excrement, and wastewater generated from these treatment processes or, in some cases, carried from the outside.
1 to 6 are block diagrams of waste treatment facilities according to Examples 1 to 3 and Reference Examples 4 to 6, FIG. 7 is a schematic configuration diagram illustrating an example of an electrolysis apparatus of this example, and FIG. It is a schematic block diagram which shows an example of an apparatus.
[Example 1]

As shown in FIG. 1, the waste treatment facility according to the first embodiment includes a first treatment system for treating a liquid waste 10 having a high content of soluble pollutants and a solid pollutant content. Two processing systems comprising a second processing system for processing the liquid waste 20 having a high rate are provided.
In the first treatment system, pretreatment equipment 11 into which liquid waste 10 having a high content of soluble pollutants is introduced and liquid waste 10 after the pretreatment are introduced in order from the upstream side of the treatment process. A biological treatment facility 12, a sludge separation facility 13 into which treatment liquid after biological treatment is introduced, an advanced treatment facility 14 into which sludge separation liquid is introduced, and a dehydrator 16 into which separated sludge 15 is introduced. Is done.
On the other hand, in the second treatment system, in order from the upstream side of the treatment process, the pretreatment facility 21 into which the liquid waste 20 having a high solid pollutant content is introduced and the solid-liquid separation into which the pretreatment liquid is introduced. The facility 22 includes an electrolytic treatment device 23 into which a solid-liquid separation liquid is introduced, and a sludge treatment facility 24 into which a solid-liquid separation sludge 27 is introduced together with the sludge 15 from the dehydrator 16.

The pretreatment facilities 11 and 21 for the liquid waste 10 having a high content of the soluble pollutant and the liquid waste 20 having a high content of the solid pollutant remove the impurities contained in the waste. A screen etc. are mentioned.
The sludge separation facility 13 and the solid-liquid separation facility 22 have dehydrating functions such as separation means such as dynamic filtration, gravity precipitation, coagulation separation, membrane separation, sand filtration, and centrifugal separation, belt press, screw press, and the like. A thing can be used individually or in combination of 2 or more. In the membrane separation, a UF membrane, MF membrane, RO membrane or the like is used.
Furthermore, in the first treatment system, the biological treatment facility 12 has a configuration in which a plurality of anaerobic tanks, aerobic tanks and sedimentation tanks are combined, and the BOD in the liquid mainly by the action of nitrifying bacteria and denitrifying bacteria, Examples include an apparatus that decomposes and removes nitrogen compounds, etc., or an apparatus that includes an adjustment tank and a methane fermentation tank, and that decomposes organic substances by the action of methane bacteria to recover methane gas.
Examples of the advanced processing equipment 14 include a coagulation separator, an ozone oxidizer, an activated carbon adsorption tower, and the like.

In the second treatment system, the sludge treatment facility 24 is a facility that performs dewatering, drying, incineration, composting, etc. of the separated sludge 27, and preferably promotes the recycling of waste by composting sludge and the like. Equipment.
The electrolyzer 23 includes an electrolytic bath for electrolytically treating a solid-liquid separated liquid, an anode and a cathode immersed in the separated liquid stored in the electrolytic tank, and a DC power source connected to the anode and the cathode. Examples of types of electrolysis that are configured and can be applied to the present embodiment include direct current electrolysis, ozone electrolysis, catalytic electrolysis, pulse electrolysis, mesh form, electrolysis using a granular electrode, and the like.

FIG. 7 shows an example of the electrolysis apparatus according to this embodiment. The electrolyzer 23 shown in FIG. 7 includes a vertically long treatment tank 31 having a vertical direction in the vertical direction, and a treatment water inlet 31a is provided at the bottom of the treatment tank 31, and a treatment water outlet 31b is provided at the top. In addition to being provided, a large number of plate-like electrode pairs 32 each consisting of an anode and a cathode are provided so as to obtain a predetermined voltage and current density over the entire region of the tank.
A DC stabilized power supply 33 that applies a DC voltage is connected to the electrode pair 32 via a multimeter 34 that monitors the voltage, current, resistance value, and the like between the electrode pair 32. The treatment tank 31 is connected to a circulation pump 35 and a circulation pipe 36, and is configured to be circulated for a predetermined time through circulation paths 35 to 36 including these.

In the treatment tank 31, by electrolyzing the solid-liquid separation solution, a hypochlorous acid-based strong oxidizing substance is mainly generated according to the following reaction formula.
(Anode) 2Cl ⁻ → Cl ₂ + 2e ⁻
Cl ₂ + H ₂ O → HClO + HCl
(Cathode) NO ₃ ⁻ + 6H ₂ O + 8e ⁻ → NH ₃ + 9OH ⁻
2H ₂ O + 2e ⁻ → 2OH ⁻ + H ₂ ↑
At the anode, chlorine is generated, and further, the chlorine reacts with water to produce hypochlorous acid (HClO) having a strong oxidizing power. On the other hand, at the cathode, when nitrate ions are contained in the separation liquid, it is reduced to ammonia, and when no nitrate ions are contained, hydrogen is generated by electrolysis of water.
Ammonia contained in the separation liquid or ammonia generated by electrolysis is decomposed and removed by the following reaction formula by hypochlorous acid generated at the anode.
2NH ₃ + 3HClO → N ₂ ↑ + 3HCl + 3H ₂ O
The electrolytic device 23 decomposes and removes most of the nitrogen content contained in the separated liquid.
Any material capable of reacting with any of the above anode materials can be used for the anode. However, in order to improve the generation efficiency of Cl ₂ , a material in which titanium or the like is used as a base and platinum or a platinum composite material is coated is preferable.
The cathode steel, stainless steel plate, but such a titanium plate can be adopted, NO ₃ ^- reducing good copper plate, copper alloy plate is preferred.

Next, the effect | action of the organic waste in the processing apparatus which concerns on a present Example is demonstrated.
In the first treatment system, waste 10 having a high content of soluble pollutants is first subjected to pretreatment such as removal of contaminants by a pretreatment device 11 and then introduced into a biological treatment facility 12, where the solubility 10 Nitrogen, BOD, and the like contained in the liquid waste 10 having a high content of pollutants are removed. The biologically treated water discharged from the biological treatment facility 12 is introduced into the sludge separation facility 13 and separated into the sludge separation liquid and the sludge separation sludge 15 by the sludge separation facility 13. After being introduced and subjected to advanced treatment, the sludge 15 is dehydrated by a dehydrator 16.
On the other hand, in the second treatment system, the liquid waste 20 having a high content of solid pollutants is subjected to pretreatment such as removal of impurities in the pretreatment facility 21, and then introduced into the solid-liquid separation facility 22. The solid-liquid separated liquid that has been subjected to the solid-liquid separation is guided to the electrolyzer 23, and the electrolyzer 23 removes the nitrogen content in the separated liquid. Furthermore, the electrolytic treatment liquid discharged from the electrolysis device 23 is fed to the inlet or outlet of the advanced treatment facility 14 of the first treatment system, where it is joined with the sludge separation liquid of the first treatment system. Released after advanced treatment.

Further, the solid-liquid separation sludge 27 separated by the solid-liquid separation facility 22 in the second treatment system was separated by the sludge separation facility 13 in the first treatment system and dehydrated by the dehydrator 16. It is introduced into the sludge treatment facility 24 together with the dewatered sludge and processed.
Furthermore, in the second treatment system, the electrolytic treatment liquid discharged from the electrolysis device 23 is introduced into a second biological treatment facility (not shown), and this biological treatment water is joined to the inlet or the outlet of the advanced treatment facility 14. Nitrogen and BOD slightly remaining in the electrolytic treatment solution may be removed by biological treatment according to the water quality. At this time, since the electrolytic treatment solution has a low concentration of contaminants such as SS and BOD, the second biological treatment facility is preferably a biological fixed bed system.

As described above, in this embodiment, the liquid waste 20 having a high solid pollutant content is separated into solid and liquid, and the solid pollutant is removed, thereby reducing the load of the pollutant and reducing the load of the solid liquid. By electrolyzing the separated liquid, the entire facility is greatly reduced in size. Further, in the present embodiment, the liquid waste 10 having a high content of soluble pollutant and the liquid waste 20 having a high content of solid pollutant are treated separately, so the sludge separation equipment 13 or the above When a sedimentation tank is used as the solid-liquid separation facility 22, the water area can be greatly reduced, and when a membrane separation device is used, the membrane area can be greatly reduced. Reduction can be achieved.
In addition, the electrolytic treatment liquid discharged from the electrolysis device 23 in the first treatment system is merged in the advanced treatment facility 14 of the second treatment system and processed at the same time. May partially decompose pollutants such as COD and chromaticity components in the separated liquid in the first treatment system with hypochlorous acid ions, ozone, etc., or active oxygen such as OH · (hydroxy radical). It is possible to reduce the load on the advanced processing equipment 14 and reduce the amount of the flocculant and activated carbon.

In addition, the separated liquid in the first treatment system can be sterilized by active oxygen such as hypochlorite ion, ozone, OH, etc. remaining in the electrolytic treatment liquid, and the disinfection installed at the subsequent stage of the advanced treatment equipment 14 Equipment (not shown) can be reduced or made unnecessary.
Furthermore, by providing the second biological treatment facility in the second treatment system, even when a slight amount of nitrogen and BOD remain in the electrolytic treatment solution, these pollutants can be reliably reduced to below the emission standard. There is no need to increase the size of the biological treatment facility 12, the sludge separation facility 13 and the like of the liquid waste 10 that can be reduced and the content of the soluble pollutant is high, and the entire facility can be made compact. .
[Example 2]

FIG. 2 shows a block diagram of an organic waste treatment facility according to the second embodiment. In addition, regarding Examples 2 to 6 shown in FIGS. 2 to 6 below, detailed description of the same configurations as those of Example 1 will be omitted.
As shown in FIG. 2, the treatment facility according to the second embodiment includes a first treatment system for treating the liquid waste 10 having a high content of soluble pollutants and a high content of solid pollutants. Two processing systems comprising a second processing system for processing the liquid waste 20 are provided, and the first processing system includes the liquid waste 10 having a high content of soluble pollutants in order from the upstream side of the processing process. Pretreatment equipment 11 to be introduced, biological treatment equipment 12 to which liquid waste 10 after the pretreatment is introduced, sludge separation equipment 13 to which biological treatment liquid after biological treatment is introduced, and sludge separation liquid are introduced Advanced treatment equipment 14 and a dehydrator 16 into which the separated sludge 15 is introduced.
On the other hand, in the second treatment system, the pretreatment facility 21 into which the liquid waste 20 having a high solid pollutant content is introduced and the pretreated liquid waste 20 are introduced in order from the upstream side of the treatment process. The dehydrator 16 is configured, the electrolytic treatment apparatus 23 into which the dehydration liquid is introduced, and the sludge treatment facility 24 into which the dewatered sludge is introduced.

The operation of the treatment apparatus according to the present embodiment will be described. In the first treatment system, first, the liquid waste 10 having a high content of the soluble pollutant is subjected to pretreatment such as removal of impurities by the pretreatment apparatus 11. After that, it is introduced into the biological treatment facility 12, and nitrogen content, BOD and the like contained in the liquid waste 10 having a high content of the soluble pollutant are removed. The biological treatment liquid discharged from the biological treatment facility 12 is introduced into the sludge separation facility 13 and separated into the sludge separation liquid and the separated sludge 15 by the sludge separation facility 13, and the separation liquid is introduced into the advanced treatment facility 14. The sludge 15 is dehydrated by a dehydrator 16.
On the other hand, in the second treatment system, the liquid waste 20 having a high content of solid pollutants is subjected to pretreatment such as removal of contaminants in the pretreatment facility 21 and then dehydrated in the dehydrator 16 and dehydrated and separated. The liquid is introduced into the electrolyzer 23, and the nitrogen content in the liquid waste is removed by the electrolyzer 23. Further, the electrolytic treatment liquid discharged from the electrolytic device 23 is fed to the inlet or the outlet of the advanced treatment facility 14 of the first treatment system, where the liquid waste having a high content of the soluble pollutant is obtained. 10 separated liquids are combined and subjected to advanced treatment before being discharged.
The dewatered sludge dehydrated by the dehydrator 16 is introduced into the sludge treatment facility 24 and processed.

In the second embodiment, since the dehydrated separation liquid generated in the sludge dewatering process of the first treatment system is introduced into the electrolysis apparatus 23 of the second treatment system, the dehydrated separation liquid with a low pollutant concentration is used as a biological material. There is no need to flow into the treatment facility 12, and the biological treatment facility 12 and the sludge separation facility 13 can be made compact.
Further, in the second embodiment, as in the first embodiment, by combining the two processing systems in the advanced processing equipment 14, the hypochlorite ions and ozone slightly remaining in the electrolytic processing solution are combined. , Or active oxygen such as OH can partially decompose pollutants such as COD and chromaticity components in the separation liquid in the first treatment system, reducing the load on the advanced treatment equipment 14 and the flocculant And the amount of activated carbon used can be reduced.
Further, the separation liquid in the first treatment system can be sterilized by active oxygen such as hypochlorite ion, ozone, OH, etc. remaining in the electrolytic treatment liquid, and the disinfection installed at the subsequent stage of the advanced treatment equipment 14 Equipment (not shown) can be reduced or made unnecessary.
Example 3

FIG. 3 shows a block diagram of an organic waste treatment facility according to the third embodiment.
As shown in FIG. 3, the organic waste treatment facility according to the third embodiment includes a first treatment system for treating the liquid waste 10 having a high content of soluble pollutant, and a solid-formed pollutant. Two processing systems comprising a second processing system for processing the liquid waste 20 having a high content ratio, the first processing system having a high content of soluble pollutants in order from the upstream side of the processing process. Pretreatment equipment 11 into which liquid waste 10 is introduced, biological treatment equipment 12 into which the pretreatment liquid is introduced, sludge separation equipment 13 into which biological treatment liquid is introduced, and advanced treatment equipment into which a separation liquid is introduced 14 and a dehydrator 16 into which the separated sludge 15 is introduced.
On the other hand, in the second treatment system, the pretreatment facility 21 into which the liquid waste 20 having a high solid pollutant content is introduced and the pretreated liquid waste 20 are introduced in order from the upstream side of the treatment process. The dehydrator 16 is configured, the electrolytic treatment apparatus 23 into which the dehydrated separated liquid after dehydration is introduced, and the sludge treatment facility 24 into which dehydrated sludge is introduced.

The operation of the processing apparatus according to the present embodiment will be described. In the first processing system, first, the liquid waste 10 having a high content of soluble pollutants is subjected to pretreatment such as removal of impurities by the pretreatment apparatus 11. After that, it is introduced into the biological treatment facility 12, and nitrogen content, BOD, etc. contained in the pretreatment liquid are removed. The treatment liquid discharged from the biological treatment facility 12 is introduced into the sludge separation facility 13, and separated into sludge separation liquid and separated sludge 15 by the sludge separation facility 13, and the separation solution is introduced into the advanced treatment facility 14. The separated sludge 15 is dehydrated by a dehydrator 16.
On the other hand, in the second treatment system, the liquid waste 20 having a high content of solid pollutants is subjected to pretreatment such as removal of contaminants in the pretreatment facility 21 and then dehydrated in the dehydrator 16 and dehydrated and separated. The liquid is introduced into the electrolyzer 23, and the nitrogen content in the liquid waste is removed by the electrolyzer 23. Furthermore, the electrolytic treatment liquid discharged from the electrolysis device 23 is supplied to the biological treatment facility 12 of the first treatment system, where it is combined with the liquid waste 10 having a high content of soluble contaminants. Biologically processed.
The dewatered sludge dehydrated by the dehydrator 16 is introduced into the sludge treatment facility 24 and processed.
According to the third embodiment, since the electrolytic treatment liquid discharged from the electrolytic treatment equipment 23 is introduced into the biological treatment equipment 12, the nitrogen content and BOD slightly remaining in the electrolytic treatment liquid are converted into the biological treatment equipment. It is possible to remove at the processing facility 12 at the same time.
[ Reference Example 4]

It shows a block diagram of a processing facility waste according to the reference example 4 in FIG.
As shown in FIG. 4, the treatment facility according to the present Reference Example 4 includes two systems of a wastewater 30 treatment system and a solid waste 40 treatment system, but is not limited to this, and two or more types Any facility that includes two or more treatment systems for treating the organic waste may be used.
The second treatment system for treating the solid waste 40 includes a composting facility 25 into which the solid waste 40 is introduced, and the first treatment system for treating the waste water 30 includes the waste water 30. A pretreatment facility 11 to be introduced, an electrolysis device 23 into which at least a part of the pretreated wastewater is introduced, a biological treatment facility 12 into which another part of the pretreated waste is introduced, It has.
The composting facility 25 is a well-known device for producing compost using organic waste as a raw material and utilizing the fermentation action of microorganisms.

In this reference example, odor gas is collected through a duct from an odor generating source such as the composting facility 25, the pretreatment facility 11, or the biological treatment facility 12, and the deodorization apparatus 18 into which these odor gases are introduced. It has. Further, at least a part of the electrolytic exhaust gas generated in the electrolytic device 23 is introduced into the deodorizing device 18.
The deodorizing device 18 reduces the odor component concentration in the odor gas by the action of chlorine, ozone, etc. contained in the electrolytic exhaust gas by bringing the collected odor gas and the electrolytic exhaust gas into air contact. Therefore, the deodorizing equipment 18 for treating the odor of the entire equipment can be made compact. The deodorizing device 18 simultaneously detoxifies chlorine and ozone contained in the electrolytic exhaust gas, and can eliminate the need for treatment such as water absorption for treating the electrolytic exhaust gas.

In addition, the odor gas which can be suitably processed in this reference example is a gas generated from the composting facility 25 by aerobic microbial fermentation of the solid waste 40 and is a gas containing a large amount of ammonia. This is because the reaction between ammonia and chlorine is very fast, and this embodiment can be effectively applied.
Furthermore, the odor gas may contain a large amount of a sulfur-based odor component such as hydrogen sulfide, methylcaptan, or methyl disulfide. At this time, examples of the odor generation source include receiving / pretreatment facilities for the waste water 30 and the solid waste 40 and a storage tank for excess sludge in biological treatment.
This is because hydrogen sulfide is converted into sulfuric acid by oxidation by ozone and absorbed into the waste water, so that this embodiment can be effectively applied.
[ Reference Example 5]

It shows a block diagram of a processing facility waste according to the reference example 5 in FIG.
As shown in FIG. 5, the treatment facility according to the present reference example 5 includes two systems, a first treatment system for treating the waste water 30 and a second treatment system for treating the solid waste 20.
The second treatment system includes a composting facility 25 into which the solid waste 40 is introduced, and the first treatment system includes a pretreatment facility 11 into which the drainage 30 is introduced, and a waste after pretreatment. The electrolysis apparatus 23 into which at least a part is introduced, and the biological treatment facility 12 into which another part of the waste after the pretreatment is introduced are provided.
The composting facility 25 is a well-known device for producing compost using organic waste as a raw material and utilizing the fermentation action of microorganisms.

In this reference example, a chemical cleaning tower in which odor gas is collected from a odor generating source such as the composting facility 25, the pretreatment facility 11, or the biological treatment facility 12 through a duct, and these odor gases are introduced. 19 is provided. Further, at least a part of the electrolytic treatment liquid generated in the electrolytic device 23 is introduced into the chemical liquid cleaning tower 19.
An example of the chemical cleaning tower 19 is shown in FIG. As shown in the figure, the chemical cleaning tower 19 includes an odor gas inlet 42 provided at the bottom of the main body 41, a processing gas outlet 43 provided at the top, and a gas flow section inside the main body 41. A filling layer 44 disposed above, an electrolytic treatment liquid spraying nozzle 45 provided above the filling layer 44, and a pump 46 for circulating the electrolytic treatment liquid.
In the main body 41, the electrolytic treatment liquid pumped up by the pump 46 is sprayed from the spray nozzle 45, and the electrolytic treatment liquid accumulated at the bottom is circulated by the pump 46 again.
The odor gas introduced from the odor gas introduction port 42 is uniformly contacted with the electrolytic treatment liquid sprayed from the spray nozzle 45 when passing through the packed bed, and hypochlorous acid remaining in the electrolytic treatment liquid. Odor components are reduced by active oxygen such as acid ions and ozone.

According to this reference example, the odorous gas generated in the facility is brought into contact with the electrolytic treatment liquid, so that the odor component is generated by active oxygen such as hypochlorite ions and ozone remaining slightly in the electrolytic treatment liquid. The deodorizing equipment for processing the odor gas of the entire facility can be made compact.
Example 6

FIG. 6 shows a block diagram of an organic waste treatment facility according to Reference Example 6.
As shown in FIG. 6, the processing facility according to Reference Example 6 has a configuration substantially similar to that of Reference Example 5. A characteristic configuration in the present reference example is that water or at least a part of the electrolytic treatment liquid generated in the electrolysis device 23 is introduced into the chemical liquid cleaning tower 19, and the composting equipment 25, the pretreatment equipment 11, and the In this configuration, the odor gas generated in the biological treatment facility 12 is brought into gas-liquid contact, and waste liquid that has absorbed odor components is introduced into the electrolyzer 23.
According to the present embodiment, wastewater with a low C / N ratio can be treated efficiently.

Further, it is preferable that ozone 28 is blown into the front stage of the electrolyzer 23, in the apparatus, or in the circulation line of the electrolyzer 23.
As described above, by electrolyzing the ozone-containing water, OH · is generated, and it is possible to decompose endocrine disrupting chemical substances such as PCB and dioxin with respect to the waste water. It is possible to decompose organic acids (acetic acid, propionic acid, butyric acid, valeric acid), methylcaptan, etc., which are difficult to decompose, from hydrogen sulfide.

  Since the present invention can be reduced in size and space-saving, and can perform treatments such as denitrification and deodorization with high efficiency, sewage treatment, human waste treatment, septic tank sludge treatment, livestock wastewater treatment, fishery processing It can be effectively applied to any of wastewater treatment, cleaning wastewater treatment, factory wastewater treatment, and the like.

It is a block diagram of processing equipment concerning Example 1 of the present invention. It is a block diagram of the processing equipment which concerns on Example 2 of this invention. It is a block diagram of the processing equipment which concerns on Example 3 of this invention. It is a block diagram of the processing equipment provided with the deodorizing apparatus which concerns on the reference example 4 of this invention. It is a block diagram of the processing equipment provided with the deodorizing apparatus which concerns on the reference example 5 of this invention. It is a block diagram of the processing equipment provided with the deodorizing apparatus which concerns on the reference example 6 of this invention. It is a schematic block diagram which shows an example of the electrolyzer of a present Example. It is a schematic block diagram which shows an example of a deodorizing apparatus.

10 Liquid waste (human waste) with high content of soluble pollutants
DESCRIPTION OF SYMBOLS 11 Pretreatment equipment 12 Biological treatment equipment 13 Sludge separation equipment 14 Advanced treatment equipment 16 Dehydrator 18 Deodorizer 19 Chemical liquid washing tower 20 Liquid waste with high solid pollutant content (septic tank sludge)
21 Pretreatment equipment 22 Solid-liquid separation equipment 23 Electrolyzer 24 Sludge treatment equipment 25 Composting equipment 28 Ozone 30 Drainage 40 Solid waste

Claims (9)

In a waste processing method for complexly processing liquid waste having a high content of soluble pollutant consisting of human waste or livestock manure and liquid waste having a high content of solid pollutant consisting of septic tank sludge ,
A first treatment system comprising a biological treatment step of biologically treating a liquid waste having a high content of the soluble pollutant, and an advanced treatment step of advanced treatment of the biological treatment liquid after the biological treatment;
A second treatment system comprising a solid-liquid separation step for solid-liquid separation of a liquid waste having a high content of the solid contaminant, and an electrolytic treatment step for electrolytic treatment of the separated liquid-liquid separation,
A waste treatment method, wherein at least a part of the electrolytic treatment solution generated in the electrolytic treatment step is introduced directly or after reduction treatment into the advanced treatment step. In the second treatment system, a second biological treatment step is provided in which the electrolytic treatment solution is biologically treated directly or after reduction treatment after the electrolytic treatment step,
2. The waste treatment method according to claim 1, wherein the biological treatment liquid generated in the second biological treatment step is introduced into the advanced treatment step.   The first treatment system includes a sludge separation step for solid-liquid separation of the biological treatment liquid generated in the biological treatment step, and a dehydration step for dewatering the separated sludge separated from the sludge. The waste treatment method according to claim 1, wherein the dehydrated separation liquid is introduced into the electrolytic treatment step.   The separated sludge is mixed with a liquid waste having a high content of solid pollutants, and in the solid-liquid separation step of the second treatment system, the solid-liquid separation is performed and simultaneously dehydrated, and the generated dehydrated separation solution is electrolyzed. The waste treatment method according to claim 3, wherein the waste treatment method is introduced into the waste water.   2. The electrolytic treatment solution generated in the electrolytic treatment step of the second treatment system is introduced into the biological treatment step of the first treatment system after direct or reduction treatment. Or the waste disposal method of 3. In a waste treatment facility that combines liquid waste with a high content of soluble pollutant consisting of human waste or livestock manure and liquid waste with a high content of solid pollutant consisting of septic tank sludge ,
Biological treatment equipment for biological treatment of liquid waste having a high content of soluble pollutant, sludge separation equipment for separating biological treatment liquid sludge generated in the biological treatment equipment, and sludge separated sludge separation liquid A first processing system including an advanced processing facility for advanced processing,
A second treatment system including a solid-liquid separation facility for solid-liquid separation of a liquid waste having a high content of the solid pollutant, and an electrolysis apparatus for electrolytically treating the solid-liquid separated liquid. Prepared,
A waste treatment facility characterized in that an introduction line for introducing at least a part of the electrolytic treatment solution generated in the electrolysis apparatus directly or after reduction treatment is introduced into the advanced treatment facility. In the second treatment system, a second biological treatment facility for biologically treating the electrolytic treatment solution directly or after reduction treatment is provided at a subsequent stage of the electrolysis device,
The waste treatment facility according to claim 6 , wherein a biological treatment liquid generated in the second biological treatment facility is introduced into the advanced treatment facility. Comprising a dehydrator for dehydrating the separated sludge generated in the sludge separation facilities of the first processing system, the dehydration separated liquid generated in the dehydration device according to claim 6, characterized in that introduced into the electrolyzer Waste treatment facility. Claim 6, characterized in that at least a portion of the electrolytically treated liquid generated by the electrolysis apparatus of the second processing system, after direct or reduction treatment, is introduced into the biological treatment facility of the first processing system Or the waste disposal facility described in 8 .

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