JP2010227911A - Method and apparatus for methane fermentation treatment - Google Patents

Method and apparatus for methane fermentation treatment Download PDF

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JP2010227911A
JP2010227911A JP2009081432A JP2009081432A JP2010227911A JP 2010227911 A JP2010227911 A JP 2010227911A JP 2009081432 A JP2009081432 A JP 2009081432A JP 2009081432 A JP2009081432 A JP 2009081432A JP 2010227911 A JP2010227911 A JP 2010227911A
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methane fermentation
foreign matter
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organic waste
carrier
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Yutaka Mori
豊 森
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Metawater Co Ltd
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    • C—CHEMISTRY; METALLURGY
    • C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
    • C12M—APPARATUS FOR ENZYMOLOGY OR MICROBIOLOGY; APPARATUS FOR CULTURING MICROORGANISMS FOR PRODUCING BIOMASS, FOR GROWING CELLS OR FOR OBTAINING FERMENTATION OR METABOLIC PRODUCTS, i.e. BIOREACTORS OR FERMENTERS
    • C12M21/00—Bioreactors or fermenters specially adapted for specific uses
    • C12M21/04—Bioreactors or fermenters specially adapted for specific uses for producing gas, e.g. biogas
    • C—CHEMISTRY; METALLURGY
    • C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
    • C12M—APPARATUS FOR ENZYMOLOGY OR MICROBIOLOGY; APPARATUS FOR CULTURING MICROORGANISMS FOR PRODUCING BIOMASS, FOR GROWING CELLS OR FOR OBTAINING FERMENTATION OR METABOLIC PRODUCTS, i.e. BIOREACTORS OR FERMENTERS
    • C12M25/00—Means for supporting, enclosing or fixing the microorganisms, e.g. immunocoatings
    • C12M25/06—Plates; Walls; Drawers; Multilayer plates
    • C—CHEMISTRY; METALLURGY
    • C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
    • C12M—APPARATUS FOR ENZYMOLOGY OR MICROBIOLOGY; APPARATUS FOR CULTURING MICROORGANISMS FOR PRODUCING BIOMASS, FOR GROWING CELLS OR FOR OBTAINING FERMENTATION OR METABOLIC PRODUCTS, i.e. BIOREACTORS OR FERMENTERS
    • C12M29/00—Means for introduction, extraction or recirculation of materials, e.g. pumps
    • C12M29/04—Filters; Permeable or porous membranes or plates, e.g. dialysis
    • C—CHEMISTRY; METALLURGY
    • C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
    • C12M—APPARATUS FOR ENZYMOLOGY OR MICROBIOLOGY; APPARATUS FOR CULTURING MICROORGANISMS FOR PRODUCING BIOMASS, FOR GROWING CELLS OR FOR OBTAINING FERMENTATION OR METABOLIC PRODUCTS, i.e. BIOREACTORS OR FERMENTERS
    • C12M45/00—Means for pre-treatment of biological substances
    • C12M45/04—Phase separators; Separation of non fermentable material; Fractionation
    • 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

Abstract

<P>PROBLEM TO BE SOLVED: To provide a method and an apparatus for methane fermentation treatment which stably carry out methane fermentation treatment of organic waste over a long period of time without clogging a microorganism capturing carrier fixed in a methane fermentation tank. <P>SOLUTION: The apparatus for methane fermentation treatment includes, in an organic waste supply route to the methane fermentation tank 1, an admixture removing tank 2 where a foreign matter capturing carrier 21 obtained by molding a fibrous material to a sheet shape is arranged. By using the apparatus for methane fermentation treatment, the organic waste is brought into contact with the foreign matter capturing carrier 21 and then is supplied to the methane fermentation tank 1 to carry out methane fermentation treatment. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

本発明は、長期にわたって、有機性廃棄物を安定してメタン発酵処理できるメタン発酵処理方法及びメタン発酵処理装置に関する。   The present invention relates to a methane fermentation treatment method and a methane fermentation treatment apparatus capable of stably treating methane fermentation of organic waste over a long period of time.

メタン発酵処理は、有機性廃棄物を嫌気性下でメタン菌により発酵処理することで、有機性廃棄物をメタンガスに転換するもので、有機性廃棄物をバイオガスと水とに分解して大幅に減量することができ、嫌気性のため曝気動力が不要であり、省エネルギーな処理法である。しかも、副産物として生成するメタンガスをエネルギーとして回収できるメリットがある。   Methane fermentation treatment converts organic waste into methane gas by fermenting organic waste under anaerobic conditions with methane bacteria, and decomposes organic waste into biogas and water. It is an energy-saving treatment method that does not require aeration power due to anaerobic properties. In addition, there is an advantage that methane gas generated as a by-product can be recovered as energy.

メタン発酵処理では、メタン発酵に関わる微生物の密度を上げることで、処理効率が向上する。このため、例えば、下記特許文献１に開示されているように、メタン発酵槽内に、繊維状物をシート状に成形してなる担体を固定配置し、該担体に微生物を付着保持させて発酵処理を行うことが行われている。   In the methane fermentation treatment, the treatment efficiency is improved by increasing the density of microorganisms involved in methane fermentation. For this reason, for example, as disclosed in Patent Document 1 below, a carrier formed by forming a fibrous material into a sheet is fixedly placed in a methane fermentation tank, and microorganisms are attached and held on the carrier for fermentation. Processing is done.

特開２００４−４１９２９号公報JP 2004-41929 A

しかしながら、担体を固定配置したメタン発酵槽内に、有機性廃棄物を供給してメタン発酵処理を行うと、有機性廃棄物中の夾雑物が担体に付着して、担体が目詰まりすることがあった。特に髪の毛などの繊維状の夾雑物を多く含んでいる有機性廃棄物をメタン発酵処理する場合、繊維状の夾雑物が担体に絡みついて担体が目詰まりし易かった。担体が目詰まりすると、メタン発酵槽内における発酵液の流動が不均一となるので、メタン発酵を担う菌体との接触効率が悪化し、発酵効率が低下するなどの不具合が発生する問題があった。   However, when organic waste is supplied to the methane fermentation tank in which the carrier is fixed and the methane fermentation treatment is performed, impurities in the organic waste may adhere to the carrier and the carrier may become clogged. there were. In particular, when organic waste containing a large amount of fibrous impurities such as hair is subjected to a methane fermentation treatment, the fibrous impurities are entangled with the carrier and the carrier is easily clogged. When the carrier is clogged, the flow of the fermentation liquid in the methane fermentation tank becomes non-uniform, so that the contact efficiency with the cells responsible for methane fermentation deteriorates, causing problems such as a decrease in fermentation efficiency. It was.

したがって、本発明の目的は、メタン発酵槽内に固定された微生物捕捉用担体が目詰まりすることなく、長期にわたって安定してメタン発酵処理することが可能なメタン発酵処理方法及びメタン発酵処理装置を提供することにある。   Therefore, an object of the present invention is to provide a methane fermentation treatment method and a methane fermentation treatment apparatus capable of stably performing methane fermentation over a long period of time without clogging the microorganism-capturing support fixed in the methane fermentation tank. It is to provide.

上記目的を達成するにあたり、本発明のメタン発酵処理方法は、有機性廃棄物を、繊維状物をシート状に成形してなる微生物捕捉用担体が固定配置されたメタン発酵槽内に供給し、嫌気性微生物によりメタン発酵させるメタン発酵処理方法において、
前記メタン発酵槽への前記有機性廃棄物の供給経路に、繊維状物をシート状に成形してなる異物捕捉用担体を配置して、前記有機性廃棄物を前記異物捕捉用担体に接触させた後、前記メタン発酵槽に供給することを特徴とする。 In achieving the above object, the methane fermentation treatment method of the present invention supplies organic waste into a methane fermentation tank in which a carrier for capturing microorganisms formed by forming a fibrous material into a sheet is fixed, In the methane fermentation treatment method for methane fermentation by anaerobic microorganisms,
In the supply path of the organic waste to the methane fermenter, a foreign matter capturing carrier formed by forming a fibrous material into a sheet is disposed, and the organic waste is brought into contact with the foreign matter capturing carrier. Then, the methane fermenter is supplied.

本発明のメタン発酵処理方法によれば、有機性廃棄物を異物捕捉用担体に接触させた後、メタン発酵槽に供給することにより、有機性廃棄物中の夾雑物が異物捕捉用担体に捕捉される。これにより、夾雑物の少ない有機性廃棄物をメタン発酵槽に供給できる。その結果、メタン発酵槽内の微生物捕捉用担体が目詰まりし難く、長期にわたって安定してメタン発酵処理し続けることができる。   According to the methane fermentation treatment method of the present invention, the organic waste is brought into contact with the foreign matter-capturing support, and then supplied to the methane fermentation tank so that impurities in the organic waste are captured by the foreign matter-capturing support. Is done. Thereby, organic waste with few impurities can be supplied to a methane fermentation tank. As a result, the carrier for capturing microorganisms in the methane fermentation tank is not easily clogged, and the methane fermentation treatment can be continued stably over a long period of time.

本発明のメタン発酵処理方法は、前記有機性廃棄物を、前記異物捕捉用担体のシート面に沿って流動させることにより、前記異物捕捉用担体に接触させることが好ましい。この態様によれば、有機性廃棄物の圧損を抑制しつつ、有機性廃棄物と異物捕捉用担体との接触効率を高めて、有機性廃棄物中の夾雑物を効率よく除去できる。   In the methane fermentation treatment method of the present invention, the organic waste is preferably brought into contact with the foreign matter capturing support by flowing along the sheet surface of the foreign matter capturing support. According to this aspect, while suppressing the pressure loss of the organic waste, the contact efficiency between the organic waste and the foreign matter capturing carrier can be increased, and the foreign matters in the organic waste can be efficiently removed.

本発明のメタン発酵処理方法は、前記異物捕捉用担体として、少なくともその断面形状が、前記微生物捕捉用担体と同じ形状のものを用いることが好ましい。この態様によれば、少なくともその断面形状が、前記微生物捕捉用担体と同じ形状のものを用いることにより、微生物捕捉用担体に付着する可能性のある夾雑物を効率よく捕捉できるので、微生物捕捉用担体への夾雑物の付着を効果的に防止できる。   In the methane fermentation treatment method of the present invention, it is preferable to use a foreign matter-capturing support having at least the same cross-sectional shape as that of the microorganism-capturing support. According to this aspect, since at least the cross-sectional shape is the same as that of the microorganism-capturing carrier, impurities that may adhere to the microorganism-trapping carrier can be efficiently captured. Adhesion of impurities to the carrier can be effectively prevented.

本発明のメタン発酵処理方法は、前記異物捕捉用担体として、全体として柱状をなし、軸方向に対して垂直な断面が、放射状に伸びる羽部を有する形状のものを用いることが好ましい。この態様によれば、異物捕捉用担体の表面積が大きいので、夾雑物を効率よく捕捉できる。   In the methane fermentation treatment method of the present invention, it is preferable to use a foreign substance-trapping carrier having a columnar shape as a whole and having a shape having wings extending radially with respect to a cross section perpendicular to the axial direction. According to this aspect, since the surface area of the foreign material capturing carrier is large, impurities can be captured efficiently.

本発明のメタン発酵処理方法は、前記異物捕捉用担体として、ポリアミド繊維をシート状に成形したものを用いることが好ましい。ポリアミド繊維は、耐薬品性、耐アルカリ性に優れるので、異物捕捉用担体に付着した夾雑物を除去する際にアルカリ薬品などを使用しても、異物捕捉用担体が劣化しにくい。このため、異物捕捉用担体に付着した夾雑物をより速やかに除去することができ、また、異物捕捉用担体を繰り返し使用できる。   In the methane fermentation treatment method of the present invention, it is preferable to use a product obtained by molding a polyamide fiber into a sheet shape as the foreign matter capturing carrier. Since the polyamide fiber is excellent in chemical resistance and alkali resistance, even when an alkaline chemical is used when removing foreign substances adhering to the foreign matter capturing support, the foreign matter capturing support is unlikely to deteriorate. For this reason, the foreign matter adhering to the foreign material capturing carrier can be removed more quickly, and the foreign material capturing carrier can be used repeatedly.

本発明のメタン発酵処理方法は、前記異物捕捉用担体の空隙率が９９〜９９．７％であることが好ましい。この態様によれば、異物捕捉用担体にて有機性廃棄物中の夾雑物を効率よく捕捉できる。   In the methane fermentation treatment method of the present invention, the porosity of the carrier for capturing foreign substances is preferably 99 to 99.7%. According to this aspect, it is possible to efficiently capture impurities in the organic waste by the foreign matter capturing carrier.

本発明のメタン発酵処理方法は、前記メタン発酵槽への前記有機性廃棄物の供給経路に、前記異物捕捉用担体を配置した流路を並列して設け、いずれかの流路の前記異物捕捉用担体が目詰まりしたときには、他方の流路を利用して有機性廃棄物を供給しつつ、前記目詰まりした異物捕捉用担体の交換または洗浄を行うことが好ましい。この態様によれば、一方の流路側の異物捕捉用担体が目詰まりした場合であっても、他方の流路を利用して有機性廃棄物中の夾雑物を除去しつつ、メタン発酵槽に夾雑物が除去された有機性廃棄物を供給できるので、運転を継続させて行うことができる。   In the methane fermentation treatment method of the present invention, the organic waste supply path to the methane fermentation tank is provided in parallel with a flow path in which the foreign matter capturing carrier is disposed, and the foreign matter capture in any flow path is performed. When the carrier for clogging is clogged, it is preferable to replace or clean the clogged foreign matter capturing carrier while supplying the organic waste using the other channel. According to this aspect, even when the foreign matter capturing carrier on one channel side is clogged, the other channel is used to remove impurities in the organic waste, Since the organic waste from which impurities are removed can be supplied, the operation can be continued.

また、本発明のメタン発酵処理装置は、繊維状物をシート状に成形してなる微生物捕捉用担体が固定配置され、有機性廃棄物を槽内の嫌気性微生物によりメタン発酵させるメタン発酵槽を備えたメタン発酵処理装置において、
前記メタン発酵槽への前記有機性廃棄物の供給経路に、繊維状物をシート状に成形してなる異物捕捉用担体を配置した夾雑物除去槽が設けられていることを特徴とする。 In addition, the methane fermentation treatment apparatus of the present invention is a methane fermentation tank in which a microorganism-capturing support formed by forming a fibrous material into a sheet is fixedly disposed, and organic waste is methane-fermented by anaerobic microorganisms in the tank. In the methane fermentation treatment equipment provided,
The supply path of the organic waste to the methane fermentation tank is provided with a foreign substance removal tank in which a foreign matter capturing carrier formed by forming a fibrous material into a sheet shape is provided.

本発明のメタン発酵処理装置によれば、異物捕捉用担体により夾雑物が捕捉されて低減された有機性廃棄物をメタン発酵槽に供給できる。このため、メタン発酵槽内の微生物捕捉用担体が目詰まりし難く、長期にわたって安定してメタン発酵処理できる。   According to the methane fermentation treatment apparatus of the present invention, it is possible to supply organic waste, in which impurities are captured and reduced by the foreign matter capturing carrier, to the methane fermentation tank. For this reason, the microorganisms trapping carrier in the methane fermentation tank is not easily clogged, and can be stably treated for methane fermentation over a long period of time.

本発明のメタン発酵処理装置の前記異物捕捉用担体は、前記夾雑物除去槽内において、そのシート面が、前記有機性廃棄物の流れ方向とほぼ平行になるように配置されていることが好ましい。この態様によれば、有機性廃棄物を、異物捕捉用担体のシート面に沿って流動させることができるので、有機性廃棄物の圧損を抑制しつつ、有機性廃棄物と異物捕捉用担体との接触効率を高めることが出来る。その結果、有機性廃棄物中の夾雑物を効率よく除去できる。   The foreign matter-trapping carrier of the methane fermentation treatment apparatus of the present invention is preferably arranged so that its sheet surface is substantially parallel to the flow direction of the organic waste in the contaminant removal tank. . According to this aspect, since the organic waste can be made to flow along the sheet surface of the foreign matter capturing carrier, the organic waste and the foreign matter capturing carrier are suppressed while suppressing the pressure loss of the organic waste. The contact efficiency can be increased. As a result, impurities in the organic waste can be efficiently removed.

本発明のメタン発酵処理装置の前記異物捕捉用担体は、少なくともその断面形状が、前記微生物捕捉用担体と同じ形状をなすことが好ましい。この態様によれば、少なくともその断面形状が、前記微生物捕捉用担体と同じ形状のものを用いることにより、微生物捕捉用担体に付着する可能性のある夾雑物をより効率よく捕捉できるので、微生物捕捉用担体への夾雑物の付着を効果的に防止できる。   It is preferable that at least the cross-sectional shape of the foreign matter capturing carrier of the methane fermentation treatment apparatus of the present invention is the same shape as the microorganism capturing carrier. According to this aspect, since the cross-sectional shape of at least the same shape as the microorganism-capturing support can be used, it is possible to more efficiently capture foreign substances that may adhere to the microorganism-capturing support. It is possible to effectively prevent foreign substances from adhering to the carrier.

本発明のメタン発酵処理装置の前記異物捕捉用担体は、全体として柱状をなし、軸方向に対して垂直な断面が、放射状に伸びる羽部を有する形状をなすことが好ましい。この態様によれば、異物捕捉用担体の表面積が大きいので、夾雑物を効率よく捕捉できる。   The foreign matter capturing carrier of the methane fermentation treatment apparatus of the present invention preferably has a columnar shape as a whole, and a cross section perpendicular to the axial direction has a shape having wings extending radially. According to this aspect, since the surface area of the foreign material capturing carrier is large, impurities can be captured efficiently.

本発明のメタン発酵処理装置の前記異物捕捉用担体は、ポリアミド繊維をシート状に成形したものであることが好ましい。ポリアミド繊維は、耐薬品性、耐アルカリ性に優れるので、異物捕捉用担体に付着した夾雑物を除去する際にアルカリ薬品などを使用しても、異物捕捉用担体が劣化しにくい。このため、異物捕捉用担体に付着した夾雑物をアルカリ薬品などで溶解させて速やかに除去でき、また、異物捕捉用担体を繰り返し使用できる。   It is preferable that the said foreign material capture | acquisition support | carrier of the methane fermentation processing apparatus of this invention shape | molds the polyamide fiber in the sheet form. Since the polyamide fiber is excellent in chemical resistance and alkali resistance, even when an alkaline chemical is used when removing foreign substances adhering to the foreign matter capturing support, the foreign matter capturing support is unlikely to deteriorate. For this reason, the foreign substance adhering to the foreign material capturing carrier can be quickly removed by dissolving it with an alkaline chemical or the like, and the foreign material capturing carrier can be used repeatedly.

本発明のメタン発酵処理装置は、前記異物捕捉用担体の空隙率が９９〜９９．７％であることが好ましい。この態様によれば、異物捕捉用担体にて有機性廃棄物中の夾雑物を効率よく捕捉できる。   In the methane fermentation treatment apparatus of the present invention, the porosity of the foreign matter capturing carrier is preferably 99 to 99.7%. According to this aspect, it is possible to efficiently capture impurities in the organic waste by the foreign matter capturing carrier.

本発明のメタン発酵処理装置は、前記メタン発酵槽への前記有機性廃棄物の供給経路に、前記夾雑物除去槽を設けた流路が並列して設けられ、いずれかの流路の前記夾雑物除去槽の異物捕捉用担体が目詰まりしたときには、他方の流路の前記夾雑物除去槽を通して有機性廃棄物を供給しつつ、前記目詰まりした異物捕捉用担体の交換または洗浄を行うことができるように構成されていることが好ましい。この態様によれば、一方の流路側の異物捕捉用担体が目詰まりした場合であっても、他方の流路を利用して有機性廃棄物中の夾雑物を除去しつつ、メタン発酵槽に夾雑物が除去された有機性廃棄物を供給できる。   In the methane fermentation treatment apparatus of the present invention, the organic waste supply path to the methane fermentation tank is provided with a flow path provided with the contaminant removal tank in parallel, and the contamination of any of the flow paths is provided. When the foreign substance capturing carrier in the debris removing tank is clogged, the clogged foreign substance capturing carrier can be replaced or washed while supplying the organic waste through the foreign substance removing tank in the other channel. It is preferable to be configured to be able to. According to this aspect, even when the foreign matter capturing carrier on one channel side is clogged, the other channel is used to remove impurities in the organic waste, Organic waste from which impurities are removed can be supplied.

本発明によれば、有機性廃棄物を異物捕捉用担体に接触させた後、メタン発酵槽に供給することにより、有機性廃棄物中の夾雑物が異物捕捉用担体に捕捉されて、夾雑物の少ない有機性廃棄物をメタン発酵槽に供給できる。このため、メタン発酵槽内の微生物捕捉用担体が目詰まりし難く、長期にわたって安定してメタン発酵処理できる。   According to the present invention, the organic waste is brought into contact with the foreign matter capturing carrier and then supplied to the methane fermentation tank, whereby the foreign matter in the organic waste is captured by the foreign matter capturing carrier, and the foreign matter is captured. Less organic waste can be supplied to the methane fermenter. For this reason, the microorganisms trapping carrier in the methane fermentation tank is not easily clogged, and can be stably treated for methane fermentation over a long period of time.

本発明のメタン発酵装置の第１の実施形態の概略構成図である。It is a schematic block diagram of 1st Embodiment of the methane fermentation apparatus of this invention. 同メタン発酵装置に用いるメタン発酵槽の概略構成図である。It is a schematic block diagram of the methane fermentation tank used for the methane fermentation apparatus. 微生物捕捉用担体の一実施形態である。It is one Embodiment of the support | carrier for microorganisms capture | acquisition. 同メタン発酵装置に用いる夾雑物除去槽の概略構成図であって、（ａ）は平面図であり、（ｂ）は（ａ）のＡ−Ａ線断面図である。It is a schematic block diagram of the contaminant removal tank used for the methane fermentation apparatus, (a) is a top view, (b) is the sectional view on the AA line of (a). 同メタン発酵装置に用いる夾雑物除去槽の他の概略構成図であって、（ａ）は平面図であり、（ｂ）は（ａ）のＢ−Ｂ線断面図である。It is another schematic block diagram of the contaminant removal tank used for the same methane fermentation apparatus, Comprising: (a) is a top view, (b) is the BB sectional drawing of (a). 異物捕捉用担体の一実施形態である。It is one Embodiment of the foreign material capture | acquisition support | carrier. 制御装置で行われる制御の一例を示すフローチャート図である。It is a flowchart figure which shows an example of the control performed with a control apparatus.

以下、図１〜７を参照して本発明のメタン発酵処理装置を説明する。   Hereinafter, the methane fermentation treatment apparatus of the present invention will be described with reference to FIGS.

図１に示すように、このメタン発酵処理装置は、メタン発酵槽１と、その前段に配置された、夾雑物除去槽２ａ，２ｂとで主に構成されている。   As shown in FIG. 1, this methane fermentation treatment apparatus mainly includes a methane fermentation tank 1 and contaminant removal tanks 2 a and 2 b arranged in the preceding stage.

すなわち、有機性廃棄物の供給源から伸びた配管Ｌ１は分岐して、第１開閉弁Ｖ１、第１夾雑物除去槽２ａ、第１流速計３、第２開閉弁Ｖ２が配置された配管Ｌ２と、第３開閉弁Ｖ３、第２夾雑物除去槽２ｂ、第２流速計４、第４開閉弁Ｖ４が配置された配管Ｌ３とに連結している。また、配管Ｌ２、配管Ｌ３の先端は、メタン発酵槽１に接続する配管Ｌ４に連結している。   That is, the pipe L1 extending from the organic waste supply source branches and the pipe L2 in which the first on-off valve V1, the first contaminant removal tank 2a, the first velocimeter 3 and the second on-off valve V2 are arranged. And the third open / close valve V3, the second contaminant removal tank 2b, the second velocimeter 4, and the pipe L3 in which the fourth open / close valve V4 is disposed. Moreover, the front-end | tip of the piping L2 and the piping L3 is connected with the piping L4 connected to the methane fermentation tank 1. FIG.

メタン発酵槽１は、図２に示すように、筒状の槽のほぼ中央に、円筒形状のドラフトチューブ１１が、その両端開口部が上下に向くように配置されている。このドラフトチューブ１１の内側には、配管Ｌ４と、メタン発酵槽１の上部から伸び、バイオガス循環ポンプＰ３が介装されたバイオガス循環配管Ｌ５が配置されている。また、ドラフトチューブ１１の外周には、繊維状物をシート状に成形した微生物捕捉用担体１２が、その端部を支持体１３ａ，１３ｂで固定されて複数本配置されている。また、メタン発酵槽１の上部には、バイオガス取出し配管Ｌ６が接続している。また、メタン発酵槽１の上部には、オーバフローした発酵液を排出する発酵廃液引き抜き配管Ｌ７が接続している。   As shown in FIG. 2, the methane fermentation tank 1 has a cylindrical draft tube 11 disposed substantially at the center of the cylindrical tank so that the opening portions at both ends face upward and downward. Inside the draft tube 11, there are disposed a pipe L4 and a biogas circulation pipe L5 extending from the upper part of the methane fermentation tank 1 and provided with a biogas circulation pump P3. Further, on the outer periphery of the draft tube 11, a plurality of microorganism capturing carriers 12 in which a fibrous material is formed into a sheet shape are arranged with their ends fixed by supports 13 a and 13 b. In addition, a biogas extraction pipe L6 is connected to the upper part of the methane fermentation tank 1. In addition, a fermentation waste liquid extraction pipe L7 for discharging the overflowed fermentation liquid is connected to the upper part of the methane fermentation tank 1.

微生物捕捉用担体１２を構成する繊維材料として、特に限定はなく、例えば、ポリエステル繊維、ポリエチレン繊維、ポリプロピレン繊維、ポリスチレン繊維、ビニロン繊維、塩化ビニリデン繊維、炭素繊維などが好ましく挙げられる。   The fiber material constituting the microorganism capturing carrier 12 is not particularly limited, and preferred examples include polyester fiber, polyethylene fiber, polypropylene fiber, polystyrene fiber, vinylon fiber, vinylidene chloride fiber, and carbon fiber.

微生物捕捉用担体１２の形状は、表面積を大きくできる形状であれば特に限定はない。例えば、図３に示すように、全体として柱状をなし、軸方向に対して垂直な断面が、放射状に伸びる羽部（この実施形態では１０本）を有する形状をなすものが好ましく挙げられる。表面積を大きくすることにより、微生物の付着効率、有機性廃棄物との接触効率が向上するので、より効果的にメタン発酵処理し易くなる。   The shape of the microorganism capturing carrier 12 is not particularly limited as long as the surface area can be increased. For example, as shown in FIG. 3, those having a columnar shape as a whole and having a shape having a wing portion (10 in this embodiment) radially extending in a cross section perpendicular to the axial direction are preferably exemplified. By increasing the surface area, the adhesion efficiency of microorganisms and the contact efficiency with organic waste are improved, so that the methane fermentation treatment can be more effectively facilitated.

微生物捕捉用担体１２の空隙率は９９〜９９．７％が好ましく、９９．３〜９９．５％がより好ましい。気孔率が９９％未満であると、微生物の付着効率が悪くなる傾向にあり、９９．７％を超えると、強度的に劣り、破損し易くなる傾向がある。   The porosity of the microorganism capturing carrier 12 is preferably 99 to 99.7%, more preferably 99.3 to 99.5%. If the porosity is less than 99%, the adhesion efficiency of microorganisms tends to be poor, and if it exceeds 99.7%, the strength tends to be inferior and breakage tends to occur.

夾雑物除去槽２は、図４に示すように、筒状の槽内に、繊維状物をシート状に成形した異物捕捉用担体２１が、その上下端部を支持体２２ａ，２２ｂで固定されて配置されている。この異物捕捉用担体２１のシート面２１ａは、有機性廃棄物の流れ方向とほぼ平行になるように配置されている。また、夾雑物除去槽２の上部には、アルカリ薬品などの洗浄液が貯留された洗浄液タンクから伸びた洗浄液供給ポンプＰ１ａ（Ｐ１ｂ）（図１参照）が介装された配管Ｌ８が接続している。また、夾雑物除去槽２の下部からは洗浄液排出ポンプＰ２ａ（Ｐ２ｂ）（図１参照）が介装された配管Ｌ９が伸びて、廃液タンクなどに接続している。   As shown in FIG. 4, the foreign substance removing tank 2 has a foreign substance capturing carrier 21 in which a fibrous substance is formed into a sheet shape in a cylindrical tank, and upper and lower ends thereof are fixed by supports 22a and 22b. Are arranged. The sheet surface 21a of the foreign substance capturing carrier 21 is disposed so as to be substantially parallel to the flow direction of the organic waste. Further, a pipe L8 having a cleaning liquid supply pump P1a (P1b) (see FIG. 1) extending from a cleaning liquid tank in which a cleaning liquid such as alkaline chemicals is stored is connected to the upper part of the contaminant removal tank 2. . A pipe L9 provided with a cleaning liquid discharge pump P2a (P2b) (see FIG. 1) extends from the lower part of the contaminant removal tank 2 and is connected to a waste liquid tank or the like.

なお、この実施形態では、夾雑物除去槽２に異物捕捉用担体２１が１本配置されているが、有機性廃棄物の流通を妨げない範囲で、複数本並列して配置してもよい。   In this embodiment, one foreign substance capturing carrier 21 is arranged in the foreign substance removing tank 2, but a plurality of foreign substance capturing supports 21 may be arranged in parallel within a range that does not hinder the circulation of organic waste.

また、図５に示すように、異物捕捉用担体２１を、連結部２３を介し、直列して複数個（図中では４個）配置してもよい。この場合、それぞれの異物捕捉用担体２１は、シート面２１ａの位相が所定角度ずつズレながら配置されていることが好ましい。直列に配置されたそれぞれの異物捕捉用担体２１は、有機性廃棄物が夾雑物除去槽２を通過する際に、それぞれの端面にあたって、シート面２１ａに効果的に接触するので、より効率よく異物捕捉用担体２１に夾雑物を捕捉させることができる。   In addition, as shown in FIG. 5, a plurality (four in the figure) of foreign substance capturing carriers 21 may be arranged in series via a connecting portion 23. In this case, it is preferable that the foreign substance capturing carriers 21 are arranged while the phase of the sheet surface 21a is shifted by a predetermined angle. Each of the foreign matter capturing carriers 21 arranged in series effectively contacts the sheet surface 21a at each end face when the organic waste passes through the contaminant removal tank 2, so that the foreign matter can be more efficiently collected. The trapping carrier 21 can trap impurities.

異物捕捉用担体２１を構成する繊維材料として、特に限定はなく、ポリエステル繊維、ポリエチレン繊維、ポリプロピレン繊維、ポリスチレン繊維、ビニロン繊維、塩化ビニリデン繊維、炭素繊維、ポリアミド繊維などが挙げられる。なかでも、耐アルカリ性、耐薬品性に優れるという理由から、ポリアミド繊維が好ましく用いられる。   The fiber material constituting the foreign substance capturing carrier 21 is not particularly limited, and examples thereof include polyester fiber, polyethylene fiber, polypropylene fiber, polystyrene fiber, vinylon fiber, vinylidene chloride fiber, carbon fiber, and polyamide fiber. Of these, polyamide fibers are preferably used because they are excellent in alkali resistance and chemical resistance.

異物捕捉用担体２１の形状は、特に限定されないが、圧損を抑制しつつ、表面積を大きくできる形状が好ましい。例えば、図６に示すように、全体として柱状をなし、軸方向に対して垂直な断面が、放射状に伸びる羽部（この実施形態では１０本）を有する形状をなすものが好ましく挙げられる。表面積を大きくすることにより、有機性廃棄物との接触効率が向上するので、より効果的に夾雑物を除去できる。   The shape of the foreign substance capturing carrier 21 is not particularly limited, but a shape that can increase the surface area while suppressing pressure loss is preferable. For example, as shown in FIG. 6, those having a columnar shape as a whole and having a cross section perpendicular to the axial direction and having wings extending radially (in this embodiment, 10) are preferably mentioned. By increasing the surface area, the contact efficiency with the organic waste is improved, so that impurities can be removed more effectively.

本発明において、異物捕捉用担体２１としては、少なくともその断面形状が、メタン発酵槽１内に配置されている微生物捕捉用担体１２と同じ形状をなすものを用いることが好ましい。具体的には、微生物捕捉用担体１２として、図３に示す形状をなすものを用いた場合、異物捕捉用担体２１は、図６に示す形状をなすものを用いることが好ましい。異物捕捉用担体２１として、少なくともその断面形状が、メタン発酵槽１内に配置されている微生物捕捉用担体１２と同じ形状をなすものを用いることにより、有機性廃棄物に含まれる夾雑物であって、微生物捕捉用担体１２に付着する可能性のある夾雑物を、異物捕捉用担体２１に捕捉させ易くなるので、微生物捕捉用担体１２の閉塞をより効果的に防止できる。   In the present invention, it is preferable to use a foreign substance capturing carrier 21 having at least a cross-sectional shape that is the same as that of the microorganism capturing carrier 12 disposed in the methane fermentation tank 1. Specifically, when the carrier for capturing microorganisms 12 having the shape shown in FIG. 3 is used, it is preferable to use the carrier for capturing foreign matter 21 having the shape shown in FIG. By using a foreign substance capturing carrier 21 having at least a cross-sectional shape that is the same as that of the microorganism capturing carrier 12 disposed in the methane fermentation tank 1, it is a contaminant contained in organic waste. As a result, foreign substances that may adhere to the microorganism capturing carrier 12 can be easily captured by the foreign substance capturing carrier 21, so that the blocking of the microorganism capturing carrier 12 can be more effectively prevented.

異物捕捉用担体２１の空隙率は９９〜９９．７％が好ましく、９９．３〜９９．５％がより好ましい。気孔率が９９％未満であると、有機性廃棄物中の夾雑物の除去効率が損なわれることがあり、９９．７％を超えると、強度的に劣り、破損し易くなる傾向がある。   The porosity of the foreign matter capturing carrier 21 is preferably 99 to 99.7%, more preferably 99.3 to 99.5%. If the porosity is less than 99%, the removal efficiency of contaminants in the organic waste may be impaired. If the porosity exceeds 99.7%, the strength tends to be inferior and breakage tends to occur.

制御装置１００は、開閉弁Ｖ１〜Ｖ４の開閉、洗浄液供給ポンプＰ１の作動、洗浄液排出ポンプＰ２の作動を、後述する図７に示すフローチャートに従って制御するようになっている。   The control device 100 controls the opening / closing of the on-off valves V1 to V4, the operation of the cleaning liquid supply pump P1, and the operation of the cleaning liquid discharge pump P2 according to a flowchart shown in FIG.

次に、このメタン発酵装置を用いた場合を例にして、本発明のメタン発酵処理方法について説明する。   Next, taking the case of using this methane fermentation apparatus as an example, the methane fermentation treatment method of the present invention will be described.

必要により前処理された有機性廃棄物が、配管Ｌ１から供給され、配管Ｌ２或いは配管Ｌ３を経由して、配管Ｌ４からメタン発酵槽１内に供給される。例えば、塵芥、生ごみ、家畜糞尿などのような有機性廃棄物の場合は、上水と混合し、粉砕・破砕などの前処理を行うことが好ましい。   The organic waste pretreated as necessary is supplied from the pipe L1 and supplied from the pipe L4 into the methane fermentation tank 1 via the pipe L2 or the pipe L3. For example, in the case of organic waste such as dust, garbage, livestock manure, etc., it is preferable to perform pretreatment such as crushing and crushing by mixing with clean water.

メタン発酵槽１では、槽内に供給された有機性廃棄物を、微生物捕捉用担体１２に担持された嫌気性微生物によりメタン発酵する。そして、有機性廃棄物をメタン発酵した際に発生したバイオガスは、バイオガス取出し配管Ｌ６から槽外に取り出され、図示しないバイオガスホルダ等に貯留される。また、発生したバイオガスの一部は、連続的又は間欠的にバイオガス循環ポンプＰ３を作動して配管Ｌ５からドラフトチューブ１１内に吹き込まれる。バイオガスがドラフトチューブ１１内に吹き込まれると、ドラフトチューブ１１内では、バイオガスが槽内の発酵液を押しのけて上方へと流れるとともに、発酵液が上向きに持上げられて、いわゆるリフトオフ上昇流が発生し、槽内で発酵液の循環が行われる。また、発酵液はバイオガスの吹き込みによりバブリングされる。なお、槽内の発酵液は、供給された有機性廃棄物と同量の発酵液が、発酵廃液引き抜き配管Ｌ７から引き抜かれ、槽内には常時一定量の発酵液が満ちている。   In the methane fermentation tank 1, the organic waste supplied into the tank is subjected to methane fermentation by anaerobic microorganisms supported on the microorganism capturing carrier 12. Then, the biogas generated when the organic waste is subjected to methane fermentation is taken out of the tank from the biogas takeout pipe L6 and stored in a biogas holder (not shown) or the like. A part of the generated biogas is blown into the draft tube 11 from the pipe L5 by operating the biogas circulation pump P3 continuously or intermittently. When the biogas is blown into the draft tube 11, the biogas pushes the fermentation liquid in the tank upward and flows upward in the draft tube 11, and the fermentation liquid is lifted upward to generate a so-called lift-off upward flow. Then, the fermentation liquid is circulated in the tank. In addition, the fermentation broth is bubbled by blowing biogas. In addition, as for the fermentation liquid in a tank, the same amount of fermentation liquid as the supplied organic waste is extracted from the fermentation waste liquid extraction piping L7, and a constant amount of fermentation liquid is always filled in the tank.

ところで、メタン発酵の処理対象物である有機性廃棄物には、髪の毛などの繊維状の夾雑物が含まれていることがある。このような夾雑物が含まれている有機性廃棄物をメタン発酵処理し続けると、夾雑物が微生物捕捉用担体１２に付着していき、最終的には、微生物捕捉用担体１２が目詰まりして発酵液の流通が妨げられ、メタン発酵処理効率が低下する。   By the way, the organic waste which is a processing object of methane fermentation may contain fibrous impurities such as hair. If the organic waste containing such impurities is continuously subjected to methane fermentation, the impurities will adhere to the microorganism-capturing support 12, and eventually the microorganism-capturing support 12 will be clogged. Therefore, the distribution of the fermentation broth is hindered, and the methane fermentation treatment efficiency is reduced.

本発明では、有機性廃棄物を異物捕捉用担体２１に接触させた後、メタン発酵槽１に供給する。すなわち、制御装置１００に起動信号が入力されると、図７に示すように、開閉弁Ｖ１〜Ｖ４に対し開弁信号をそれぞれ出力する（ステップＳ１）。これにより、有機性廃棄物は、第１夾雑物除去槽２ａを通過する経路と、第２夾雑物除去槽２ｂを通過する経路の２系統から、それぞれメタン発酵槽１に供給される。この状態でメタン発酵処理を継続すると、有機性廃棄物中の夾雑物は、異物捕捉用担体２１に捕捉されるので、メタン発酵槽１には、夾雑物の少ない有機性廃棄物が供給される。   In the present invention, the organic waste is brought into contact with the foreign matter capturing carrier 21 and then supplied to the methane fermentation tank 1. That is, when an activation signal is input to the control device 100, valve opening signals are output to the on-off valves V1 to V4 as shown in FIG. 7 (step S1). Thus, the organic waste is supplied to the methane fermentation tank 1 from two systems, a path that passes through the first contaminant removal tank 2a and a path that passes through the second contaminant removal tank 2b. If the methane fermentation treatment is continued in this state, the contaminants in the organic waste are captured by the foreign matter capturing carrier 21, and therefore, the organic waste with less contaminants is supplied to the methane fermentation tank 1. .

しかしながら、各夾雑物除去槽２内の異物捕捉用担体２１には、夾雑物が徐々に付着していき、目詰まりが生じる。そこで、まず、第１流速計３の計測値が設定値未満であるかどうか判断する（ステップＳ２）。   However, contaminants gradually adhere to the foreign substance capturing carrier 21 in each contaminant removal tank 2 and clogging occurs. Therefore, first, it is determined whether or not the measured value of the first velocimeter 3 is less than the set value (step S2).

第１流速計３の計測値が設定値未満であった場合は、第１夾雑物除去槽２ａ内の異物捕捉用担体２１は目詰まりが生じていると判断し、開閉弁Ｖ１，Ｖ２に対し閉弁信号を出力する（ステップＳ３）。これにより、有機性廃棄物は、第２夾雑物除去槽２ｂのみを通過してメタン発酵槽１に供給される。そして、洗浄液供給ポンプＰ１ａに作動信号を出力して第１夾雑物除去槽２ａ内に洗浄液を供給する（ステップＳ４）。第１夾雑物除去槽２ａに洗浄液を所定時間供給した後、洗浄液排出ポンプＰ２ａを作動して（ステップＳ５）、第１夾雑物除去槽２ａ内に滞留している洗浄液を排出する。これにより、第１夾雑物除去槽２ａ内の異物捕捉用担体２１に付着していた夾雑物が除去され、異物捕捉用担体２１の目詰まりが解消される。この洗浄液は複数種類でも良く、例えば洗浄液に水及びアルカリ液を用いる場合は、洗浄液の供給・排出をそれぞれの洗浄液毎に繰り返す。そして、開閉弁Ｖ１，Ｖ２に対し開弁信号を出力し（ステップＳ６）、ステップＳ２に戻る。   If the measured value of the first velocimeter 3 is less than the set value, it is determined that the foreign matter capturing carrier 21 in the first contaminant removal tank 2a is clogged, and the on / off valves V1 and V2 are A valve closing signal is output (step S3). As a result, the organic waste is supplied to the methane fermentation tank 1 through only the second contaminant removal tank 2b. Then, an operation signal is output to the cleaning liquid supply pump P1a to supply the cleaning liquid into the first contaminant removal tank 2a (step S4). After supplying the cleaning liquid to the first contaminant removal tank 2a for a predetermined time, the cleaning liquid discharge pump P2a is operated (step S5), and the cleaning liquid staying in the first contaminant removal tank 2a is discharged. Thereby, the foreign matter adhering to the foreign matter capturing carrier 21 in the first foreign matter removing tank 2a is removed, and the foreign matter catching carrier 21 is clogged. A plurality of types of cleaning liquids may be used. For example, when water and an alkaline liquid are used as the cleaning liquid, supply and discharge of the cleaning liquid are repeated for each cleaning liquid. And a valve opening signal is output with respect to on-off valve V1, V2 (step S6), and it returns to step S2.

一方、第１流速計３の計測値が設定値以上の場合であれば、第１夾雑物除去槽２ａ内の異物捕捉用担体２１は目詰まりが生じていないと判断し、第２流速計４の計測値が設定値未満であるかどうかの判断が行われる（ステップＳ７）。   On the other hand, if the measured value of the first velocimeter 3 is equal to or greater than the set value, it is determined that the foreign matter capturing carrier 21 in the first contaminant removal tank 2a is not clogged, and the second velocimeter 4 Whether or not the measured value is less than the set value is determined (step S7).

第２流速計４の計測値が設定値以上の場合であれば、第２夾雑物除去槽２ｂ内の異物捕捉用担体２１も目詰まりしていないと判断し、ステップＳ２に戻る。   If the measured value of the second velocimeter 4 is equal to or greater than the set value, it is determined that the foreign matter capturing carrier 21 in the second contaminant removal tank 2b is not clogged, and the process returns to step S2.

一方、第２流速計４の計測値が設定値未満の場合は、開閉弁Ｖ３，Ｖ４に対し閉弁信号を出力し（ステップＳ８）、有機性廃棄物を、第１夾雑物除去槽２ａのみを通過させてメタン発酵槽１に供給させる。そして、洗浄液供給ポンプＰ１ｂに作動信号を出力して第２夾雑物除去槽２ｂ内に洗浄液を供給し（ステップＳ９）、洗浄液を所定時間供給した後、洗浄液排出ポンプＰ２ｂを作動して（ステップＳ１０）、第２夾雑物除去槽２ｂ内に滞留している洗浄液を排出した後、開閉弁Ｖ３，Ｖ４に対し開弁信号を出力する（ステップＳ１１）。そして、停止信号が入力されたか否かを判断し（ステップＳ１２）、停止信号が入力されていなければ、ステップＳ２に戻る。このような制御を、運転停止信号が入力されるまで継続する。そして、ステップＳ１２にて、停止信号が入力されたら、開閉弁Ｖ１〜Ｖ４を閉じ（ステップＳ１３）、処理を終了する。   On the other hand, if the measured value of the second velocimeter 4 is less than the set value, a valve closing signal is output to the on-off valves V3 and V4 (step S8), and the organic waste is removed from the first contaminant removal tank 2a only. Is supplied to the methane fermentation tank 1. Then, an operation signal is output to the cleaning liquid supply pump P1b to supply the cleaning liquid into the second contaminant removal tank 2b (step S9). After supplying the cleaning liquid for a predetermined time, the cleaning liquid discharge pump P2b is operated (step S10). ) After discharging the cleaning liquid staying in the second contaminant removal tank 2b, a valve opening signal is output to the on-off valves V3 and V4 (step S11). Then, it is determined whether or not a stop signal is input (step S12). If no stop signal is input, the process returns to step S2. Such control is continued until an operation stop signal is input. And if a stop signal is inputted in Step S12, opening-and-closing valves V1-V4 are closed (Step S13), and processing is ended.

このように、本発明によれば、有機性廃棄物を、第１夾雑物除去槽２ａ又は第２夾雑物除去槽２ｂに供給し、槽内に配置された異物捕捉用担体２１に接触させた後、メタン発酵槽に供給することにより、有機性廃棄物中の夾雑物が異物捕捉用担体に捕捉されて、メタン発酵槽１には、夾雑物の極めて少ない有機性廃棄物を供給できる。その結果、メタン発酵槽内の微生物捕捉用担体１３は目詰まりし難くなり、長期にわたって安定してメタン発酵処理し続けることができる。また、夾雑物除去槽を設けた流路を並列して設けることにより、異物捕捉用担体２１が目詰まりしたら、一方の夾雑物除去槽を通して有機性廃棄物を供給しつつ、他方の夾雑物除去槽の目詰まりした異物捕捉用担体２１の洗浄を行うことができるので、有機性廃棄物の供給を停止することなく、異物捕捉用担体２１の洗浄を行うことができる。更には、目詰まりが生じた異物捕捉用担体２１に対し、洗浄液を導入して夾雑物を除去して繰り返し使用するので経済的である。   Thus, according to the present invention, the organic waste is supplied to the first contaminant removal tank 2a or the second contaminant removal tank 2b and brought into contact with the foreign matter capturing carrier 21 disposed in the tank. Thereafter, by supplying the methane fermentation tank to the methane fermentation tank, impurities in the organic waste are captured by the foreign matter-capturing carrier, and the methane fermentation tank 1 can be supplied with organic waste having very little impurities. As a result, the microorganism capturing carrier 13 in the methane fermentation tank is less likely to be clogged, and the methane fermentation treatment can be continued stably over a long period of time. Moreover, when the foreign substance capturing carrier 21 is clogged by providing the flow path provided with the foreign substance removal tank in parallel, the organic waste is supplied through the one foreign substance removal tank while the other foreign substance removal is performed. Since the foreign substance capturing carrier 21 clogged in the tank can be washed, the foreign substance catching carrier 21 can be washed without stopping the supply of the organic waste. Furthermore, it is economical because the cleaning liquid is introduced into the foreign substance capturing carrier 21 in which the clogging has occurred to remove impurities and is used repeatedly.

なお、この実施形態では、異物捕捉用担体２１が目詰まりしたら、洗浄液を導入して洗浄するようにしたが、目詰まりが生じた異物捕捉用担体２１を交換するようにしてもよい。また、開閉弁Ｖ１〜Ｖ４の開閉、洗浄液供給ポンプＰ１の作動、洗浄液排出ポンプＰ２の作動を、それぞれタイマーで管理して、定期的に異物捕捉用担体２１の洗浄を行うように制御してもよい。   In this embodiment, when the foreign substance capturing carrier 21 is clogged, the cleaning liquid is introduced for cleaning, but the foreign substance capturing carrier 21 in which clogging has occurred may be replaced. Also, the opening / closing of the on-off valves V1 to V4, the operation of the cleaning liquid supply pump P1, and the operation of the cleaning liquid discharge pump P2 may be managed by timers so that the foreign matter capturing carrier 21 is periodically cleaned. Good.

１：メタン発酵槽
２、２’、２ａ、２ｂ：夾雑物除去槽
３，４：流速計
１１：ドラフトチューブ
１２：微生物捕捉用担体
１３ａ、１３ｂ：支持体
２１：異物捕捉用担体
２２ａ、２２ｂ：支持体
２３：連結部
１００：制御装置
Ｌ１〜Ｌ９：配管
Ｐ１ａ、Ｐ１ｂ：洗浄液供給ポンプ
Ｐ２ａ、Ｐ２ｂ：洗浄液排出ポンプ
Ｐ３：バイオガス循環ポンプ
Ｖ１〜Ｖ４：開閉弁 1: Methane fermenter 2, 2 ′, 2a, 2b: Contaminant removal tank 3, 4: Current meter 11: Draft tube 12: Microorganism capture carrier 13a, 13b: Support 21: Foreign matter capture carrier 22a, 22b: Support body 23: Connecting part 100: Control devices L1 to L9: Pipes P1a, P1b: Cleaning liquid supply pumps P2a, P2b: Cleaning liquid discharge pumps P3: Biogas circulation pumps V1 to V4: On-off valves

Claims (14)

有機性廃棄物を、繊維状物をシート状に成形してなる微生物捕捉用担体が固定配置されたメタン発酵槽内に供給し、嫌気性微生物によりメタン発酵させるメタン発酵処理方法において、
前記メタン発酵槽への前記有機性廃棄物の供給経路に、繊維状物をシート状に成形してなる異物捕捉用担体を配置して、前記有機性廃棄物を前記異物捕捉用担体に接触させた後、前記メタン発酵槽に供給することを特徴とするメタン発酵処理方法。 In the methane fermentation treatment method in which organic waste is supplied into a methane fermentation tank in which a microorganism-capturing support formed by forming a fibrous material into a sheet is fixed, and methane-fermented by anaerobic microorganisms.
In the supply path of the organic waste to the methane fermenter, a foreign matter capturing carrier formed by forming a fibrous material into a sheet is disposed, and the organic waste is brought into contact with the foreign matter capturing carrier. And then supplying the methane fermentation tank with the methane fermentation treatment method. 前記有機性廃棄物を、前記異物捕捉用担体のシート面に沿って流動させることにより、前記異物捕捉用担体に接触させる、請求項１記載のメタン発酵処理方法。   The methane fermentation treatment method according to claim 1, wherein the organic waste is brought into contact with the foreign matter-capturing support by flowing along the sheet surface of the foreign matter-capturing support. 前記異物捕捉用担体として、少なくともその断面形状が、前記微生物捕捉用担体と同じ形状のものを用いる、請求項１又は２に記載のメタン発酵処理方法。   3. The methane fermentation treatment method according to claim 1, wherein the foreign matter-capturing support has at least the same cross-sectional shape as the microorganism-capturing support. 前記異物捕捉用担体として、全体として柱状をなし、軸方向に対して垂直な断面が、放射状に伸びる羽部を有する形状のものを用いる、請求項１〜３のいずれか１つに記載のメタン発酵処理方法。   The methane according to any one of claims 1 to 3, wherein the foreign matter-capturing support has a columnar shape as a whole, and a cross section perpendicular to the axial direction has a shape having wings extending radially. Fermentation processing method. 前記異物捕捉用担体として、ポリアミド繊維をシート状に成形したものを用いる、請求項１〜４のいずれか１項に記載のメタン発酵処理方法。   The methane fermentation treatment method according to any one of claims 1 to 4, wherein the foreign matter-trapping carrier is a polyamide fiber formed into a sheet shape. 前記異物捕捉用担体の空隙率が９９〜９９．７％である、請求項１〜５のいずれか１項に記載のメタン発酵処理方法。   The methane fermentation treatment method according to any one of claims 1 to 5, wherein a porosity of the carrier for capturing foreign substances is 99 to 99.7%. 前記メタン発酵槽への前記有機性廃棄物の供給経路に、前記異物捕捉用担体を配置した流路を並列して設け、いずれかの流路の前記異物捕捉用担体が目詰まりしたときには、他方の流路を利用して有機性廃棄物を供給しつつ、前記目詰まりした異物捕捉用担体の交換又は洗浄を行う、請求項１〜６のいずれか１項に記載のメタン発酵処理方法。   In the supply path of the organic waste to the methane fermenter, a flow path in which the foreign matter capturing carrier is arranged is provided in parallel, and when the foreign matter capturing support in any of the flow paths is clogged, the other The methane fermentation treatment method according to any one of claims 1 to 6, wherein the clogged foreign matter-capturing support is replaced or washed while supplying organic waste using the flow path. 繊維状物をシート状に成形してなる微生物捕捉用担体が固定配置され、有機性廃棄物を槽内の嫌気性微生物によりメタン発酵させるメタン発酵槽を備えたメタン発酵処理装置において、
前記メタン発酵槽への前記有機性廃棄物の供給経路に、繊維状物をシート状に成形してなる異物捕捉用担体を配置した夾雑物除去槽が設けられていることを特徴とするメタン発酵処理装置。 In a methane fermentation treatment apparatus equipped with a methane fermentation tank in which a microorganism-capturing support formed by forming a fibrous material into a sheet is fixed and methane-fermenting organic waste with anaerobic microorganisms in the tank,
In the methane fermentation, the organic waste supply path to the methane fermentation tank is provided with a foreign substance removal tank in which a foreign matter-capturing carrier formed by forming a fibrous material into a sheet shape is provided. Processing equipment. 前記異物捕捉用担体は、前記夾雑物除去槽内において、そのシート面が、前記有機性廃棄物の流れ方向とほぼ平行になるように配置されている請求項８記載のメタン発酵処理装置。   9. The methane fermentation treatment apparatus according to claim 8, wherein the foreign matter-trapping carrier is disposed in the contaminant removal tank so that a sheet surface thereof is substantially parallel to a flow direction of the organic waste. 前記異物捕捉用担体は、少なくともその断面形状が、前記微生物捕捉用担体と同じ形状をなす、請求項８又は９記載のメタン発酵処理装置。   The methane fermentation treatment apparatus according to claim 8 or 9, wherein at least the cross-sectional shape of the foreign substance capturing carrier is the same as that of the microorganism capturing carrier. 前記異物捕捉用担体は、全体として柱状をなし、軸方向に対して垂直な断面が、放射状に伸びる羽部を有する形状をなす、請求項８〜１０のいずれか１つに記載のメタン発酵処理装置。   The methane fermentation treatment according to any one of claims 8 to 10, wherein the foreign matter-trapping support has a columnar shape as a whole, and a cross section perpendicular to the axial direction has a shape having wings extending radially. apparatus. 前記異物捕捉用担体は、ポリアミド繊維をシート状に成形したものである、請求項８〜１１のいずれか１項に記載のメタン発酵処理装置。   The methane fermentation treatment apparatus according to any one of claims 8 to 11, wherein the foreign matter-trapping carrier is a polyamide fiber formed into a sheet shape. 前記異物捕捉用担体の空隙率が９９〜９９．７％である、請求項８〜１２のいずれか１項に記載のメタン発酵処理装置。   The methane fermentation treatment apparatus according to any one of claims 8 to 12, wherein the foreign substance-trapping carrier has a porosity of 99 to 99.7%. 前記メタン発酵槽への前記有機性廃棄物の供給経路に、前記夾雑物除去槽を設けた流路が並列して設けられ、いずれかの流路の前記夾雑物除去槽の異物捕捉用担体が目詰まりしたときには、他方の流路の前記夾雑物除去槽を通して有機性廃棄物を供給しつつ、前記目詰まりした異物捕捉用担体の交換又は洗浄を行うことができるように構成されている、請求項８〜１３のいずれか１項に記載のメタン発酵処理装置。   In the supply path of the organic waste to the methane fermentation tank, a flow path provided with the contaminant removal tank is provided in parallel, and the foreign matter capturing carrier of the contaminant removal tank in any of the flow paths is provided. When clogged, the organic waste is supplied through the contaminant removal tank in the other channel, and the clogged foreign matter capturing carrier can be replaced or washed. The methane fermentation treatment apparatus according to any one of Items 8 to 13.
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