WO2023171006A1 - Système et procédé de traitement de matière organique - Google Patents

Système et procédé de traitement de matière organique Download PDF

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Publication number
WO2023171006A1
WO2023171006A1 PCT/JP2022/035241 JP2022035241W WO2023171006A1 WO 2023171006 A1 WO2023171006 A1 WO 2023171006A1 JP 2022035241 W JP2022035241 W JP 2022035241W WO 2023171006 A1 WO2023171006 A1 WO 2023171006A1
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WIPO (PCT)
Prior art keywords
liquid
solid
separated
organic matter
alkaline
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PCT/JP2022/035241
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English (en)
Japanese (ja)
Inventor
成樹 松本
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株式会社サピエナント
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Filing date
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Publication of WO2023171006A1 publication Critical patent/WO2023171006A1/fr

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    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F11/00—Treatment of sludge; Devices therefor
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F11/00—Treatment of sludge; Devices therefor
    • C02F11/02—Biological treatment
    • C02F11/04—Anaerobic treatment; Production of methane by such processes
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F11/00—Treatment of sludge; Devices therefor
    • C02F11/06—Treatment of sludge; Devices therefor by oxidation
    • C02F11/08—Wet air oxidation
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F11/00—Treatment of sludge; Devices therefor
    • C02F11/12—Treatment of sludge; Devices therefor by de-watering, drying or thickening
    • C02F11/121—Treatment of sludge; Devices therefor by de-watering, drying or thickening by mechanical de-watering
    • C02F11/127—Treatment of sludge; Devices therefor by de-watering, drying or thickening by mechanical de-watering by centrifugation
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E50/00—Technologies for the production of fuel of non-fossil origin
    • Y02E50/30—Fuel from waste, e.g. synthetic alcohol or diesel

Definitions

  • the present invention relates to an organic matter treatment system and an organic matter treatment method.
  • an object of the present invention is to reduce the amount of alkaline solution used when hydrolyzing organic matter contained in sludge, excrement, or residue containing water-soluble organic matter. .
  • the organic matter treatment system includes a first solid-liquid separation means for separating organic matter contained in at least one of sludge, excrement, or residue containing water-soluble organic matter into solid and liquid; a hydrolysis means that generates an alkaline hydrolyzed liquid by adding an alkaline substance to the first separated solid separated by the solid-liquid separation means and hydrolyzing the first separated solid; It has an anaerobic fermentation means for generating biogas by anaerobically fermenting the separated first separated liquid and the liquid containing the alkaline hydrolyzed liquid.
  • the anaerobic fermentation means may have an acid fermenter at the front stage that promotes acid fermentation.
  • the anaerobic fermentation means further includes a second solid-liquid separation means for separating the alkaline hydrolyzed liquid produced by the hydrolysis means into solid and liquid, and the anaerobic fermentation means separates the first separated liquid and the second solid-liquid separation.
  • Biogas may be generated by anaerobically fermenting the second separated liquid separated by the means.
  • the anaerobic fermentation means includes a first anaerobic fermentation means for anaerobically fermenting the first separated liquid or an aerobic processing means for aerobically processing the first separated liquid, and a second anaerobic fermentation means for anaerobically fermenting the second separated liquid.
  • the alkaline substance may be potassium hydroxide
  • the second separated liquid may contain more potassium than the first separated liquid.
  • the organic matter treatment system further includes an ammonia separation means for separating ammonia contained in the alkaline hydrolysis liquid produced by the hydrolysis means, and the anaerobic fermentation means separates the first separated liquid and the ammonia separation means.
  • Biogas may be generated by anaerobically fermenting the liquid containing the alkaline hydrolyzed liquid from which ammonia has been separated.
  • the organic matter treatment system may further include an aerobic treatment means provided after the anaerobic fermentation means, and the aerobic treatment means may purify the treated water discharged from the anaerobic fermentation means.
  • the organic matter treatment system is configured to treat the first solidified liquid based on the amount of at least one of a refractory substance that is difficult to decompose by anaerobic fermentation and an anaerobic microbial interference substance that is denatured by alkaline hydrolysis, contained in the first separated liquid.
  • the amount of added chemicals used for solid-liquid separation the amount of dilution water, the amount of microair for flotation separation, the gravity intensity applied for solid-liquid separation, or separation.
  • the method may further include a control means for determining at least one of the processing times of the steps.
  • the organic matter processing system includes a foreign matter removing means for removing foreign matter from the organic matter, and a foreign matter removing means that uses anaerobic fermentation contained in the first separated liquid before the first solid-liquid separation means separates the organic matter into solid and liquid. Based on the amount of at least one of a persistent substance that is difficult to decompose or an anaerobic microbial interfering substance that is denatured by alkaline hydrolysis, the foreign substance removal means determines the processing time for removing foreign substances, the amount of dilution water, and the amount of foreign substance removal.
  • the device may further include a control device that controls at least one of the width of the screen of the device and the amount of micro air for pressurized flotation.
  • the method for treating organic matter according to the second aspect of the present invention includes the steps of separating organic matter contained in at least one of sludge, excrement, or residue containing water-soluble organic matter into solid and liquid; A step of generating an alkaline hydrolyzed liquid by adding an alkaline substance and hydrolyzing the first separated solid, and anaerobically fermenting the separated first separated liquid and a liquid containing the alkaline hydrolyzed liquid. and a step of generating biogas.
  • FIG. 1 is a diagram showing the configuration of an organic matter treatment system 1 according to a first embodiment.
  • FIG. 2 is a diagram showing the configuration of an organic matter treatment system 2 according to a second embodiment. It is a figure showing the composition of organic matter processing system 3 of a 3rd embodiment. It is a figure showing the composition of organic substance processing system 4 of a 4th embodiment. It is a figure showing the composition of organic matter processing system 5 of a 5th embodiment. It is a figure showing the composition of organic substance processing system 6 of a 6th embodiment. It is a figure showing the composition of organic substance processing system 7 of a 7th embodiment.
  • FIG. 1 is a diagram showing the configuration of an organic matter treatment system 1 according to the first embodiment.
  • the organic matter treatment system 1 is a system that can generate biogas by anaerobically fermenting organic sludge, livestock manure, or residue containing soluble organic matter (hereinafter referred to as "sludge, etc.”).
  • the residue containing water-soluble organic matter is, for example, food residue.
  • the organic matter treatment system 1 includes a solid-liquid separator 11, an alkaline hydrolysis tank 12, and an anaerobic fermentation tank 13.
  • a method for treating organic matter can be carried out, which includes a step of generating biogas by anaerobically fermenting a separated liquid and a liquid containing an alkaline hydrolyzed liquid.
  • the solid-liquid separator 11 is a first solid-liquid separator that separates sludge and the like into solid and liquid.
  • the solid-liquid separator 11 is, for example, a centrifuge that separates solids and liquids by centrifugal force, or a separation tank that separates solids and liquids by generating flocs using a chemical for coagulating solid components. be.
  • a liquid diluted by adding water to sludge or the like is stirred, and then solid and liquid are separated.
  • the first separated solid produced by solid-liquid separation is sent to the alkaline hydrolysis tank 12.
  • the first separated liquid produced by solid-liquid separation mainly contains soluble organic substances, and can be decomposed by anaerobic fermentation without performing alkaline hydrolysis treatment. Therefore, the first separated liquid is sent to the anaerobic fermentation tank 13 without being subjected to alkaline hydrolysis in the alkaline hydrolysis tank 12.
  • the alkaline hydrolysis tank 12 is a hydrolysis means that generates an alkaline hydrolyzate by adding an alkaline substance to the first separated solid separated by the solid-liquid separation means and hydrolyzing the separated solid.
  • an alkaline substance is added to the charged first separated solid, mixed, and then heated to alkaline hydrolyze the first separated solid, so that the first separated solid is dissolved in water.
  • a solubilization step is performed to produce an alkaline hydrolyzate.
  • the alkaline hydrolyzate is sent to the anaerobic fermenter 13.
  • the pH of the first separated solid is adjusted to an alkaline range of 8 to 14 by adding an alkaline substance such as sodium hydroxide (NaOH) or potassium hydroxide (KOH).
  • an alkaline substance such as sodium hydroxide (NaOH) or potassium hydroxide (KOH).
  • the first separated solid which has been adjusted to be alkaline, is heated at a temperature within a range of 100°C or more and 250°C or less while applying a high pressure equal to or higher than the saturated water vapor pressure, thereby adding alkaline hydration to the first separated solid. Disassemble.
  • the heating time is, for example, 10 seconds or more and 3 hours or less.
  • the anaerobic fermentation tank 13 is an anaerobic fermentation means that generates biogas by anaerobically fermenting the first separated liquid separated by the first solid-liquid separation means and the liquid containing the alkaline hydrolysis liquid.
  • the anaerobic fermentation tank 13 is a processing tank for fermenting the first separated liquid and solubilized sludge, which is an alkaline hydrolyzed liquid such as sludge, by performing anaerobic treatment using anaerobic microorganisms to generate methane gas.
  • anaerobic microorganisms are bacteria that metabolically decompose and digest organic matter in an oxygen-free environment.
  • the anaerobic fermentation tank 13 is, for example, an EGSB (Expanded Granular Sludge Bed) type digestion tank, and anaerobic microorganisms decompose and digest the organic matter in the first separated liquid and solubilized sludge.
  • EGSB Expanded Granular Sludge Bed
  • anaerobic microorganisms decompose and digest the organic matter in the first separated liquid and solubilized sludge.
  • biogas containing methane gas is generated by performing an anaerobic fermentation process over, for example, about one day.
  • the anaerobic fermentation tank 13 may be provided with an acid fermentation tank at the front stage that promotes acid fermentation. Anaerobically treated water treated by anaerobic fermentation is sent to, for example, a sewage treatment facility.
  • the first separated solid separated in the solid-liquid separator 11 is alkaline hydrolyzed and reduced in molecular weight before being sent to the anaerobic fermentation tank 13.
  • the first separated liquid after being separated in the solid-liquid separator 11 is sent to the anaerobic fermenter 13 without being subjected to alkaline hydrolysis.
  • FIG. 2 is a diagram showing the configuration of an organic matter treatment system 2 according to the second embodiment.
  • the organic matter treatment system 2 differs from the organic matter treatment system 1 shown in FIG. This is similar to organic matter treatment system 1 in this respect.
  • the solid-liquid separator 14 has the same function as the solid-liquid separator 11, and separates the alkaline hydrolyzed liquid produced by the alkaline hydrolysis tank 12 into solid waste and a second separated liquid. If the alkaline substance input into the alkaline hydrolysis tank 12 is potassium hydroxide, the solid waste can also be used as fertilizer.
  • the second separated liquid is sent to the anaerobic fermenter 13.
  • the anaerobic fermentation tank 13 generates biogas by subjecting the first separated liquid sent from the solid-liquid separator 11 and the second separated liquid separated by the solid-liquid separator 14 to anaerobic fermentation.
  • the organic matter treatment system 2 includes the solid-liquid separator 14, even if solids that are difficult to decompose by anaerobic fermentation remain in the alkaline hydrolysis liquid, such solids can be removed by anaerobic fermentation. It is not sent to tank 13. As a result, it is possible to prevent suspended solids (SS) from accumulating in the anaerobic fermenter 13 and adversely affecting microorganisms or reducing fermentation efficiency. Particularly when an EGSB type digester is used, the inflowing suspended floats have the effect of preventing the decomposition of the granules inside. Moreover, an acid fermenter may be attached to the anaerobic fermenter.
  • FIG. 3 is a diagram showing the configuration of an organic matter treatment system 3 according to the third embodiment.
  • the organic matter treatment system 3 differs from the organic matter treatment system 1 shown in FIG. 1 and the organic matter treatment system 2 shown in FIG. 2 in that it further includes a control device 15.
  • the control device 15 has a processor that operates by executing a program stored in a storage medium, for example, and is a control means for controlling the operation of the solid-liquid separation device 11.
  • the control device 15 controls whether the solid-liquid in the solid-liquid separator 11 is controlled based on the amount of at least one of a refractory substance that is difficult to undergo anaerobic fermentation or an anaerobic microbial interference substance that is denatured by alkaline hydrolysis, contained in the first separated liquid. Controls the intensity of the separation process.
  • the control device 15 controls the amount of the agent used for solid-liquid separation, the amount of dilution water, and the amount of water used to float and separate solid components.
  • At least either the amount of microair to be produced or the processing time of the separation step is determined based on the amount of the anaerobic fermentation-refractory substance or the anaerobic microbially interfering substance denatured by alkaline hydrolysis.
  • the control device 15 determines the gravity intensity applied for solid-liquid separation or the processing time of the separation step. Specifically, the control device 15 increases the amount of chemicals used for solid-liquid separation or increases the gravity strength as the amount of persistent substances contained in the first separation liquid increases. or increase processing time.
  • the organic matter treatment system 3 is configured to use such a control device 15.
  • the organic matter treatment system 3 is configured to use such a control device 15.
  • the control device 15 when the sludge contains an anaerobic microbial interfering substance that is denatured by alkaline hydrolysis, the anaerobic microbial interfering substance is contained in the first separated liquid and the first separated solid is You can choose not to include it. As a result, it is possible to suppress the generation of anaerobic microbial interfering substances when the first separated solid is subjected to alkaline hydrolysis.
  • FIG. 4 is a diagram showing the configuration of an organic matter treatment system 4 according to the fourth embodiment.
  • the organic matter treatment system 4 differs from the organic matter treatment system 1 shown in FIG. 1 and the organic matter treatment system 2 shown in FIG. 2 in that it includes a control device 15 and a foreign matter removal device 16.
  • the control device 15 has a processor that operates by executing a program stored in a storage medium, for example, and controls the operation of the foreign object removal device 16.
  • the foreign matter removal device 16 is a foreign matter removal means that removes foreign matter from the sludge, excrement, or residue containing water-soluble organic matter before the solid-liquid separation device 11 separates the organic matter contained in the sludge, excrement, or residue into solid and liquid. It is.
  • the foreign matter removing device 16 is, for example, a screen for removing bedding such as straw or sawdust that is difficult to solubilize, a dehydrator, and a device that floats foreign matter by applying water and pressure.
  • the removed litter can be reused as recycled litter. When foreign substances are hydrolyzed with alkaline, they may transform into toxic anaerobic microorganism-interfering substances.
  • substances that may be transformed into anaerobic microbial-interfering substances are removed as foreign substances in advance, and such substances are hydrolyzed with alkaline water. By not introducing it into the decomposition process, stable anaerobic fermentation can be achieved.
  • the control device 15 controls the foreign matter removal device 16 based on the amount of at least one of the refractory substances that are difficult to undergo anaerobic fermentation and the anaerobic microbial interference substances that are denatured by alkaline hydrolysis, which are contained in the first separated liquid. At least one of the processing time for removing foreign matter, the amount of dilution water, the width of the screen of the foreign matter removing device 16, or the amount of microair for pressurized flotation is controlled. Specifically, the control device 15 increases the time required for the foreign matter removal device 16 to remove the foreign matter as the amount of the persistent substance contained in the first separated liquid increases.
  • the first separated liquid after solid-liquid separation by the solid-liquid separator 11 may contain persistent substances.
  • the control device 15 it is possible to suppress the inclusion of a difficult-to-decompose substance in the first separated liquid sent to the alkaline hydrolysis tank 12. As a result, it is possible to prevent persistent substances from accumulating in the anaerobic fermenter 13 and adversely affecting microorganisms and reducing fermentation efficiency.
  • FIG. 5 is a diagram showing the configuration of an organic matter treatment system 5 according to the fifth embodiment.
  • the organic matter treatment system 5 differs from the organic matter treatment system 1 in that an ammonia separation tank 17 is provided between the alkaline hydrolysis tank 12 and the anaerobic fermentation tank 13 in the organic matter treatment system 1 of the first embodiment. , are otherwise the same.
  • the ammonia separation tank 17 separates ammonia contained in the alkaline hydrolysis liquid flowing from the alkaline hydrolysis tank 12 by ammonia stripping.
  • the ammonia separation tank 17 may separate ammonia by flushing the alkaline hydrolysis liquid in the ammonia separation tank 17 using this pressure when the pressure inside the alkaline hydrolysis tank is equal to or higher than atmospheric pressure.
  • FIG. 6 is a diagram showing the configuration of an organic matter treatment system 6 according to the sixth embodiment.
  • the organic matter treatment system 6 is different from the organic matter treatment system 2 in that an ammonia separation tank 17 is provided between the alkaline hydrolysis tank 12 and the solid-liquid separation device 14 in the organic matter treatment system 2 of the second embodiment. different and in other respects the same.
  • FIG. 7 is a diagram showing the configuration of an organic matter treatment system 7 according to the seventh embodiment.
  • the organic matter treatment system 7 differs from the organic matter treatment system 2 in that an ammonia separation tank 17 is provided between the alkaline hydrolysis tank 12 and the anaerobic fermentation tank 13 in the organic matter treatment system 3 of the third embodiment. , are otherwise the same.
  • the organic matter treatment system 1 to the organic matter treatment system 7 further include an aerobic treatment tank (not shown) downstream of the anaerobic fermentation tank 13, and the treated water discharged from the anaerobic fermentation tank 13 is purified in the aerobic treatment tank. You may.
  • the first separated liquid generated when the solid-liquid separator 11 performs solid-liquid separation and the second separated liquid generated when the solid-liquid separator 14 performs solid-liquid separation.
  • the separated liquid was sent to the anaerobic fermentation tank 13
  • the first separated liquid and the second separated liquid may be sent to different microbial treatment tanks. That is, the first separated liquid may be sent to the first anaerobic fermentor or the aerobic treatment tank, and the second separated liquid may be sent to the second anaerobic fermenter.
  • the second separated liquid contains more potassium than the first separated liquid.
  • the first separated liquid contains almost no potassium
  • the second separated liquid contains a large amount of potassium.
  • potassium in the second separated liquid is diluted with the first separated liquid.
  • the first separated liquid and the second separated liquid may be treated in different first and second anaerobic fermenters, or in an aerobic treatment tank and a second anaerobic fermenter.
  • the treated water after treating the first separated liquid in the first anaerobic fermentation tank or the aerobic treatment tank is discharged into a river, etc.
  • the treated water after treating the second separated liquid in the second anaerobic fermentation tank is used as potassium fertilizer. It can be done.
  • a part of the treated water of the first anaerobic fermenter may be sent to the second anaerobic fermenter.
  • a small amount of alkali is added to decompose the bad odor generated from the sludge, excrement, and residue containing water-soluble organic matter. You may.
  • This alkali has a pH of 10 or less, for example.
  • Organic matter treatment system 1 Organic matter treatment system 2 Organic matter treatment system 3 Organic matter treatment system 4 Organic matter treatment system 11 Solid-liquid separation device 12 Alkaline hydrolysis tank 13 Anaerobic fermentation tank 14 Solid-liquid separation device 15 Control device 16 Foreign matter removal device 17 Ammonia separation tank

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Organic Chemistry (AREA)
  • Water Supply & Treatment (AREA)
  • Environmental & Geological Engineering (AREA)
  • Hydrology & Water Resources (AREA)
  • Mechanical Engineering (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Health & Medical Sciences (AREA)
  • Molecular Biology (AREA)
  • Processing Of Solid Wastes (AREA)
  • Treatment Of Sludge (AREA)

Abstract

L'invention concerne un système de traitement de matière organique (1) comprenant : un dispositif de séparation solide-liquide (11) pour séparer la matière organique contenue dans une ou plusieurs substances parmi les boues, le fumier et les résidus contenant de la matière organique soluble dans l'eau, en un solide et un liquide ; une cuve d'hydrolyse alcaline (12) pour générer une solution d'hydrolysat alcalin en ajoutant une substance alcaline à un premier solide séparé par le dispositif de séparation solide-liquide (11) et en soumettant le premier solide séparé à l'hydrolyse ; et une cuve de fermentation anaérobie (13) pour générer un biogaz par fermentation anaérobie du premier liquide séparé par le dispositif de séparation solide-liquide (11), et soumettre le premier solide séparé à l'hydrolyse ; et une cuve de fermentation anaérobie (13) pour générer un biogaz par fermentation anaérobie du premier liquide séparé par le dispositif de séparation solide-liquide (11) et d'un liquide contenant la solution d'hydrolysat alcalin générée.
PCT/JP2022/035241 2022-03-08 2022-09-21 Système et procédé de traitement de matière organique WO2023171006A1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
JP2022035334 2022-03-08
JP2022-035334 2022-03-08
JP2022068957 2022-04-19
JP2022-068957 2022-04-19

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WO2023171006A1 true WO2023171006A1 (fr) 2023-09-14

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Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH03238091A (ja) * 1990-02-15 1991-10-23 Ebara Infilco Co Ltd メタン発酵処理方法
JPH10249384A (ja) * 1997-03-11 1998-09-22 Ishikawajima Harima Heavy Ind Co Ltd 高濃度懸濁物含有廃水の処理方法
JP2000015228A (ja) * 1998-07-06 2000-01-18 Kubota Corp 有機性廃棄物の発酵方法
JP2001300486A (ja) * 2000-04-26 2001-10-30 Babcock Hitachi Kk 有機性廃棄物のメタン発酵処理装置及び方法
JP2004082017A (ja) * 2002-08-28 2004-03-18 Babcock Hitachi Kk 有機性廃棄物のメタン発酵方法および装置
JP2008155075A (ja) * 2006-12-20 2008-07-10 Jfe Engineering Kk 汚水の処理方法および処理装置
JP2017119242A (ja) * 2015-12-28 2017-07-06 株式会社サピエナント 有機物処理システム及び有機物処理方法

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH03238091A (ja) * 1990-02-15 1991-10-23 Ebara Infilco Co Ltd メタン発酵処理方法
JPH10249384A (ja) * 1997-03-11 1998-09-22 Ishikawajima Harima Heavy Ind Co Ltd 高濃度懸濁物含有廃水の処理方法
JP2000015228A (ja) * 1998-07-06 2000-01-18 Kubota Corp 有機性廃棄物の発酵方法
JP2001300486A (ja) * 2000-04-26 2001-10-30 Babcock Hitachi Kk 有機性廃棄物のメタン発酵処理装置及び方法
JP2004082017A (ja) * 2002-08-28 2004-03-18 Babcock Hitachi Kk 有機性廃棄物のメタン発酵方法および装置
JP2008155075A (ja) * 2006-12-20 2008-07-10 Jfe Engineering Kk 汚水の処理方法および処理装置
JP2017119242A (ja) * 2015-12-28 2017-07-06 株式会社サピエナント 有機物処理システム及び有機物処理方法

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