JP2005169165A - Treatment method for organic waste and its system - Google Patents
Treatment method for organic waste and its system Download PDFInfo
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- JP2005169165A JP2005169165A JP2003408455A JP2003408455A JP2005169165A JP 2005169165 A JP2005169165 A JP 2005169165A JP 2003408455 A JP2003408455 A JP 2003408455A JP 2003408455 A JP2003408455 A JP 2003408455A JP 2005169165 A JP2005169165 A JP 2005169165A
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- 239000010815 organic waste Substances 0.000 title claims abstract description 29
- 238000000034 method Methods 0.000 title claims abstract description 22
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims abstract description 84
- 239000007788 liquid Substances 0.000 claims abstract description 43
- 239000002699 waste material Substances 0.000 claims abstract description 43
- 238000005868 electrolysis reaction Methods 0.000 claims abstract description 26
- 239000007789 gas Substances 0.000 claims abstract description 20
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 claims abstract description 15
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims abstract description 15
- 239000000460 chlorine Substances 0.000 claims abstract description 15
- 229910052801 chlorine Inorganic materials 0.000 claims abstract description 15
- 239000001301 oxygen Substances 0.000 claims abstract description 15
- 229910052760 oxygen Inorganic materials 0.000 claims abstract description 15
- 239000001257 hydrogen Substances 0.000 claims abstract description 13
- 229910052739 hydrogen Inorganic materials 0.000 claims abstract description 13
- 239000000446 fuel Substances 0.000 claims abstract description 12
- 230000018044 dehydration Effects 0.000 claims abstract description 9
- 238000006297 dehydration reaction Methods 0.000 claims abstract description 9
- 230000001954 sterilising effect Effects 0.000 claims abstract description 9
- 238000004659 sterilization and disinfection Methods 0.000 claims abstract description 9
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims abstract description 8
- 239000002737 fuel gas Substances 0.000 claims abstract description 6
- 238000000855 fermentation Methods 0.000 claims description 32
- 230000004151 fermentation Effects 0.000 claims description 32
- 239000010802 sludge Substances 0.000 claims description 18
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 11
- 238000000926 separation method Methods 0.000 claims description 3
- 230000005611 electricity Effects 0.000 claims description 2
- 238000005273 aeration Methods 0.000 abstract description 5
- 150000002431 hydrogen Chemical class 0.000 abstract description 5
- QVGXLLKOCUKJST-NJFSPNSNSA-N oxygen-18 atom Chemical compound [18O] QVGXLLKOCUKJST-NJFSPNSNSA-N 0.000 abstract description 3
- 238000006243 chemical reaction Methods 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 238000003672 processing method Methods 0.000 description 4
- 239000002361 compost Substances 0.000 description 3
- 238000009264 composting Methods 0.000 description 3
- 238000001035 drying Methods 0.000 description 3
- 230000003647 oxidation Effects 0.000 description 3
- 238000007254 oxidation reaction Methods 0.000 description 3
- KZBUYRJDOAKODT-UHFFFAOYSA-N Chlorine Chemical compound ClCl KZBUYRJDOAKODT-UHFFFAOYSA-N 0.000 description 2
- MYMOFIZGZYHOMD-UHFFFAOYSA-N Dioxygen Chemical compound O=O MYMOFIZGZYHOMD-UHFFFAOYSA-N 0.000 description 2
- 238000005345 coagulation Methods 0.000 description 2
- 230000015271 coagulation Effects 0.000 description 2
- 229910001882 dioxygen Inorganic materials 0.000 description 2
- 239000012528 membrane Substances 0.000 description 2
- 238000010248 power generation Methods 0.000 description 2
- 238000000746 purification Methods 0.000 description 2
- 150000003839 salts Chemical class 0.000 description 2
- 238000004062 sedimentation Methods 0.000 description 2
- HGUFODBRKLSHSI-UHFFFAOYSA-N 2,3,7,8-tetrachloro-dibenzo-p-dioxin Chemical compound O1C2=CC(Cl)=C(Cl)C=C2OC2=C1C=C(Cl)C(Cl)=C2 HGUFODBRKLSHSI-UHFFFAOYSA-N 0.000 description 1
- CBENFWSGALASAD-UHFFFAOYSA-N Ozone Chemical compound [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000002921 fermentation waste Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- -1 hydrogen Chemical compound 0.000 description 1
- 239000002440 industrial waste Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 244000005700 microbiome Species 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000005063 solubilization Methods 0.000 description 1
- 230000007928 solubilization Effects 0.000 description 1
- 230000003381 solubilizing effect Effects 0.000 description 1
- 230000009897 systematic effect Effects 0.000 description 1
- 239000002351 wastewater Substances 0.000 description 1
- 238000004065 wastewater treatment Methods 0.000 description 1
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- 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
-
- 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
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/30—Hydrogen technology
- Y02E60/50—Fuel cells
-
- 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
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/30—Use of alternative fuels, e.g. biofuels
-
- 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
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W10/00—Technologies for wastewater treatment
- Y02W10/20—Sludge processing
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- 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
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/20—Waste processing or separation
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- Fuel Cell (AREA)
- Processing Of Solid Wastes (AREA)
- Separation Using Semi-Permeable Membranes (AREA)
- Purification Treatments By Anaerobic Or Anaerobic And Aerobic Bacteria Or Animals (AREA)
- Treatment Of Sludge (AREA)
Abstract
Description
この発明は、嫌気性微生物を用いて、生ゴミ，汚泥等の有機性廃棄物にメタン発酵を施し、該メタン発酵により発生する消化汚泥を脱水して脱水ケーキを生成する有機性廃棄物の処理方法とそのシステムに関する。 The present invention uses anaerobic microorganisms to subject organic waste such as garbage and sludge to methane fermentation, and dehydrates digested sludge generated by the methane fermentation to produce a dehydrated cake. It relates to a method and its system.
生ゴミ、汚泥等の有機性廃棄物の殆どは、焼却や埋立処分されているが、焼却に伴うダイオキシンの発生や埋立処分地の減少や悪臭等の問題から、環境負荷の少ない処理方法が求められている。これらの問題を解決する為に有機性廃棄物をメタン発酵処理し、発生したメタンガスを燃料電池やガスエンジン等の発電機を用いて発電するシステムが開発されている。 Most organic waste such as raw garbage and sludge is incinerated or landfilled. However, due to problems such as dioxin generation due to incineration, decrease in landfill sites and bad odor, a treatment method with low environmental impact is required. It has been. In order to solve these problems, a system has been developed in which organic waste is subjected to methane fermentation treatment, and the generated methane gas is generated using a generator such as a fuel cell or a gas engine.
またメタン発酵後の廃液は廃液処理設備で曝気による脱窒素処理，生物浄化処理および凝集沈殿処理を行い、引き続き、脱水機により脱水して液部を放流し、残った残渣は、コンポスト利用又は減容化した廃棄物として処理している（特許文献１参照）。 The waste liquid after methane fermentation is subjected to denitrification treatment by aeration, biological purification treatment and coagulation sedimentation treatment at the waste liquid treatment facility, followed by dehydration with a dehydrator to discharge the liquid part, and the remaining residue is used for compost or reduced. The waste is treated as a waste material (see Patent Document 1).
図２は、特許文献１に記載されたシステムを簡略化して示す従来のメタン発酵システムの系統図である。図２において、生ゴミ等の有機性廃棄物１は、メタン発酵槽２でメタン発酵処理し、発生したメタン３をガスホルダ４に一旦貯蔵して、燃料電池やガスエンジン等の発電機５を用いて発電し、その交流出力６を所内電源７等に使用する。 FIG. 2 is a system diagram of a conventional methane fermentation system showing the system described in Patent Document 1 in a simplified manner. In FIG. 2, organic waste 1 such as raw garbage is subjected to methane fermentation treatment in a methane fermentation tank 2, and the generated methane 3 is temporarily stored in a gas holder 4, and a generator 5 such as a fuel cell or a gas engine is used. The AC output 6 is used as an in-house power source 7 or the like.
また、メタン発酵槽２からは、メタン３の他に、メタン発酵後の発酵廃液８が排出され、廃液処理設備９において、曝気による脱窒素処理，生物浄化処理および凝集沈殿処理等が行われる。この凝集した廃液処理液１０を脱水機１１で脱水してその廃液１２を放流し、約８０％の水分を含む脱水ケーキ１３は、コンポストの原料または産業廃棄物として処理される。なお、前記脱窒素処理は、硝化脱窒法における硝化反応と脱窒反応とにより処理され、これらの反応は、いずれも酸素の存在下で行われる。
ところで、前記従来のメタン発酵システムを用いた有機性廃棄物の処理方法においては、廃液処理設備から排出される廃液を脱水機で処理した脱水ケーキ中に、約８０％の水分を含んでおり、コンポスト化に要する乾燥動力費や、廃棄物の輸送費等のランニングコストが過大となり、このコストが、全体の処理コストの大きな割合を占める問題があった。 By the way, in the organic waste processing method using the conventional methane fermentation system, the dehydrated cake obtained by treating the waste liquid discharged from the waste liquid treatment facility with a dehydrator contains about 80% of water, Running costs such as drying power cost required for composting and transportation cost of waste are excessive, and this cost occupies a large proportion of the total processing cost.
この発明は、上記の点に鑑みてなされたもので、本発明の課題は、脱水ケーキの処理コスト低減が可能で、かつ、そのための追加設備によって発生した水素，酸素，塩素等のガスの有効利用によって、全体的に低ランニングコスト化を図った有機性廃棄物の処理方法とそのシステムを提供することにある。 The present invention has been made in view of the above points. An object of the present invention is to reduce the processing cost of a dehydrated cake, and to effectively use gases such as hydrogen, oxygen, and chlorine generated by additional equipment therefor. The object is to provide a method and system for treating organic waste, which is designed to reduce the overall running cost by use.
上記課題は、以下により達成される。即ち、請求項１の発明によれば、生ゴミ，汚泥等の有機性廃棄物にメタン発酵を施し、該メタン発酵により発生する消化汚泥を脱水して脱水ケーキを生成する有機性廃棄物の処理方法において、前記脱水ケーキに含まれる水分を電気分解して除去することを特徴とする。 The above-mentioned subject is achieved by the following. That is, according to the invention of claim 1, organic waste such as raw garbage and sludge is subjected to methane fermentation, and digested sludge generated by the methane fermentation is dehydrated to produce a dehydrated cake. In the method, the water contained in the dehydrated cake is electrolyzed and removed.
前記処理方法によれば、廃液処理設備の廃液を脱水機で処理した脱水ケーキを、電気分解槽に入れて水を酸素と水素に分解し、脱水ケーキ中の水分を低減させることにより、コンポスト化に要する乾燥動力費低減や、残渣重量を軽量化させて輸送費の低減を図ることができる。 According to the treatment method, the dehydrated cake obtained by treating the waste liquid of the waste liquid treatment facility with a dehydrator is put into an electrolysis tank, the water is decomposed into oxygen and hydrogen, and the water in the dehydrated cake is reduced, thereby composting. It is possible to reduce the drying power cost required for the transportation and to reduce the transportation cost by reducing the weight of the residue.
なお、本発明に関わる有機性廃棄物の処理方法とは異なる有機性排水処理方法において、汚泥を電解処理（電解酸化）することが知られている（例えば、特開２００２−１２６７８１号公報参照）。この場合の電解処理は、有機性排水の活性汚泥処理法において、返送汚泥の可溶化処理が目的であり、本発明のように、脱水ケーキに含まれる水分を電気分解して除去すること、即ち、脱水ケーキの軽量化が目的ではない。前記活性汚泥処理法における可溶化処理方法としては、上記電解酸化以外に、オゾン酸化、加熱などの通常分解法などが用いられている。 It is known that sludge is electrolytically treated (electrolytic oxidation) in an organic wastewater treatment method different from the organic waste treatment method according to the present invention (see, for example, JP-A-2002-126781). . The electrolytic treatment in this case is for the purpose of solubilizing the returned sludge in the activated sludge treatment method for organic wastewater, and as in the present invention, the water contained in the dewatered cake is electrolyzed and removed, that is, The goal is not to reduce the weight of the dehydrated cake. As the solubilization treatment method in the activated sludge treatment method, a normal decomposition method such as ozone oxidation or heating is used in addition to the electrolytic oxidation.
また、前記請求項１に記載の処理方法において、前記電気分解により陽極側に生成した酸素および塩素を、隔膜分離装置により分離し、分離された酸素は前記メタン発酵の廃液内に曝気して当該廃液の硝化脱窒に利用し、分離された塩素は前記脱水後の廃液内に曝気して当該廃液の殺菌に利用することを特徴とする（請求項２）。 Further, in the treatment method according to claim 1, oxygen and chlorine generated on the anode side by the electrolysis are separated by a diaphragm separator, and the separated oxygen is aerated into the waste liquid of the methane fermentation to The chlorine used for the nitrification denitrification of the waste liquid is aerated in the waste liquid after the dehydration and used for sterilization of the waste liquid (Claim 2).
電気分解により陽極に発生するガスは、酸素及び脱脂ケーキに含まれる塩分からの塩素であり、このガスを隔膜分離装置に経由させて分離した酸素を廃液処理槽の曝気に用いて、硝化脱窒法における硝化反応と脱窒反応とに利用し、脱窒素の効率を向上させることができる。さらに、分離した塩素は、脱水機からの廃液を塩素処理し殺菌して排水することにより、クリーンな排水が確保できる。 The gas generated at the anode by electrolysis is oxygen and chlorine from the salt contained in the defatted cake. The oxygen separated by passing this gas through the diaphragm separator is used for aeration of the waste liquid treatment tank, and the nitrification denitrification method The nitrification reaction and the denitrification reaction in can be used to improve the denitrification efficiency. Furthermore, the separated chlorine can ensure clean drainage by chlorinating and draining the waste liquid from the dehydrator.
さらに、前記請求項１または２に記載の処理方法において、前記電気分解により陰極側に生成した水素を、前記メタン発酵により発生するメタンガスと共に、燃料電池発電装置やガスエンジン発電機等の燃料ガスとして利用することを特徴とする（請求項３）。 Furthermore, in the processing method according to claim 1 or 2, hydrogen generated on the cathode side by the electrolysis is used as fuel gas for a fuel cell power generator, a gas engine generator, or the like together with methane gas generated by the methane fermentation. (Claim 3).
電気分解により陰極に発生した水素は、上記のように、例えば、燃料電池発電等に導入して有効利用することにより、省エネルギー化が図れる。 As described above, for example, hydrogen generated in the cathode by electrolysis can be used for fuel cell power generation or the like and effectively used to save energy.
上記処理方法を実施するための装置としては、下記請求項４または５の発明が好ましい。即ち、生ゴミ，汚泥等の有機性廃棄物にメタン発酵を施し、該メタン発酵により発生する消化汚泥を脱水して脱水ケーキを生成する有機性廃棄物の処理システムにおいて、メタン発酵槽と、メタン発酵の廃液処理設備と、メタン発酵により発生する消化汚泥を脱水して脱水ケーキを生成する脱水機と、前記脱水ケーキに含まれる水分を電気分解して除去する電気分解槽とを備えたことを特徴とする（請求項４）。 As an apparatus for carrying out the above processing method, the invention of claim 4 or 5 is preferable. That is, in an organic waste treatment system in which organic waste such as garbage and sludge is subjected to methane fermentation, and the digested sludge generated by the methane fermentation is dehydrated to produce a dehydrated cake. A waste liquid treatment facility for fermentation, a dehydrator that dehydrates digested sludge generated by methane fermentation to produce a dehydrated cake, and an electrolysis tank that electrolyzes and removes moisture contained in the dehydrated cake. It is characterized (claim 4).
また、前記請求項４に記載の処理システムにおいて、前記電気分解により陽極側に生成した酸素および塩素を分離する隔膜分離装置と、前記分離された酸素をメタン発酵の廃液処理設備に導入するラインと、前記分離された塩素を前記脱水後の廃液内に曝気して当該廃液を殺菌する殺菌槽とを備え、さらに、前記電気分解により陰極側に生成した水素を、燃料電池発電装置やガスエンジン発電機等の燃料ガスラインに導入し、発電した電気を前記電気分解槽に供給する構成を備えたことを特徴とする（請求項５）。 Further, in the treatment system according to claim 4, a membrane separation device for separating oxygen and chlorine generated on the anode side by the electrolysis, a line for introducing the separated oxygen into a waste liquid treatment facility for methane fermentation, A sterilization tank that sterilizes the waste liquid by aerating the separated chlorine into the waste liquid after dehydration, and further, hydrogen generated on the cathode side by the electrolysis is converted into a fuel cell power generator or a gas engine power generator. And a fuel gas line such as an electric machine to supply the generated electricity to the electrolysis tank (Claim 5).
前記システムによれば、環境にやさしく、かつランニングコスト低減可能なメタン発酵に基づく有機性廃棄物の処理システムが得られる。 According to the said system, the processing system of the organic waste based on methane fermentation which is environmentally friendly and can reduce running cost is obtained.
この発明によれば、メタン発酵により発生する消化汚泥を脱水して生成した脱水ケーキ中の水分を、電気分解により低減させることにより、コンポスト化に要する乾燥動力費低減や、残渣重量を軽量化させて輸送費の低減を図ることができる。また、電気分解により発生する水素，酸素，塩素ガスの有効利用を図ることにより、全体的に低ランニングコスト化を図った有機性廃棄物の処理方法とそのシステムが提供できる。 According to the present invention, the moisture in the dehydrated cake produced by dehydrating the digested sludge generated by methane fermentation is reduced by electrolysis, thereby reducing the drying power cost required for composting and reducing the weight of the residue. Transportation costs can be reduced. Further, by effectively utilizing hydrogen, oxygen, and chlorine gas generated by electrolysis, it is possible to provide a method and system for treating organic waste that can reduce the overall running cost.
次に、この発明の実施形態に関して、図１に基いて説明する。図１は、本発明の実施形態に係る有機性廃棄物の処理システムの系統図であり、前記図２に示すシステムにおける同一機能部材には同一番号を付して、その詳細説明を省略する。 Next, an embodiment of the present invention will be described with reference to FIG. FIG. 1 is a system diagram of an organic waste treatment system according to an embodiment of the present invention. The same functional members in the system shown in FIG. 2 are denoted by the same reference numerals, and detailed description thereof is omitted.
図１に示すシステムを用いた有機性廃棄物の処理方法においては、廃液処理液１０を、脱水機１１で脱水処理した約８０％の水分を含む脱水ケーキ１３を、電気分解槽１６に投入する。脱水ケーキ１３に含まれる水は、燃料電池，ガスエンジン等の発電機５からの交流出力６を交流直流変換器１４で変換した直流出力１５によりに電気分解される。 In the organic waste processing method using the system shown in FIG. 1, a dehydrated cake 13 containing about 80% of water obtained by dehydrating the waste liquid treatment liquid 10 with the dehydrator 11 is put into the electrolysis tank 16. . Water contained in the dewatered cake 13 is electrolyzed by a DC output 15 obtained by converting an AC output 6 from a generator 5 such as a fuel cell or a gas engine by an AC / DC converter 14.
電気分解槽１６の陽極に発生するガスは、酸素１８及び脱脂ケーキに含まれる塩分からの塩素１９であり、このガスを隔膜分離装置２０に経由させて分離した酸素１８は、廃液処理設備９の曝気に用いて、前述のように、廃液からの脱窒素の効率を向上させる。また塩素１９は、脱水機１１からの廃液を殺菌すべく、殺菌槽２２に導入され、殺菌されたクリーンな水が殺菌槽２２から放流される。一方、電気分解槽１６の陰極に発生した水素２３は、メタンガスホルダー４に一旦供給され、メタン３と共に、メタン＋水素からなる燃料ガス２４として、例えば、燃料電池等の発電機５に導入される。
The gas generated at the anode of the electrolysis tank 16 is oxygen 18 and chlorine 19 from the salt contained in the defatted cake. The oxygen 18 separated by passing this gas through the membrane separator 20 is supplied to the waste liquid treatment equipment 9. Used for aeration, the efficiency of denitrification from waste liquid is improved as described above. Chlorine 19 is introduced into the sterilization tank 22 to sterilize the waste liquid from the dehydrator 11, and sterilized clean water is discharged from the sterilization tank 22. On the other hand, the
上記のように、廃液処理設備９の廃液を脱水したケーキを、燃料電池等の発電機の電源を用いる電気分解槽１６で処理することによって、脱水ケーキの軽量化による脱水ケーキの処理コスト低減、コンポスト製造コスト低減が可能となる。また、電気分解槽１６から発生する酸素ガスによる廃液脱窒、塩素ガスによる廃液殺菌、水素ガス補給による燃料電池等の発電が可能となり、全体としてランニングコストが低く、かつ環境にやさしい有機性廃棄物の処理システムを提供することができる。 As described above, the cake obtained by dewatering the waste liquid from the waste liquid treatment facility 9 is processed in the electrolysis tank 16 using a power source of a generator such as a fuel cell, thereby reducing the processing cost of the dehydrated cake by reducing the weight of the dehydrated cake. Compost manufacturing cost can be reduced. In addition, waste liquid denitrification with oxygen gas generated from the electrolysis tank 16, waste liquid sterilization with chlorine gas, and power generation of fuel cells, etc. by hydrogen gas replenishment are possible, and organic waste that is low in running cost and environmentally friendly as a whole A processing system can be provided.
１ 有機性廃棄物
２ メタン発酵槽
４ ガスホルダ
５ 発電機
７ 所内用電源
９ 廃液処理設備
１１ 脱水機
１４ 交流直流変換器
１６ 電気分解槽
２０ 隔膜分離装置
２１ 酸素ガスホルダ
２２ 殺菌槽
DESCRIPTION OF SYMBOLS 1 Organic waste 2 Methane fermentation tank 4 Gas holder 5 Power generator 7 Power supply for in-house 9 Waste liquid processing equipment 11 Dehydrator 14 AC / DC converter 16 Electrolysis tank 20 Separator 20 Oxygen gas holder 22 Sterilization tank
Claims (5)
前記脱水ケーキに含まれる水分を電気分解して除去することを特徴とする有機性廃棄物の処理方法。 In the organic waste treatment method of subjecting organic waste such as garbage and sludge to methane fermentation and dewatering the digested sludge generated by the methane fermentation to produce a dehydrated cake,
A method for treating organic waste, characterized by electrolyzing and removing water contained in the dehydrated cake.
メタン発酵槽と、メタン発酵の廃液処理設備と、メタン発酵により発生する消化汚泥を脱水して脱水ケーキを生成する脱水機と、前記脱水ケーキに含まれる水分を電気分解して除去する電気分解槽とを備えたことを特徴とする有機性廃棄物の処理システム。 In an organic waste treatment system that applies methane fermentation to organic waste such as raw garbage and sludge, and dehydrates digested sludge generated by the methane fermentation to produce a dehydrated cake.
A methane fermentation tank, a waste liquid treatment facility for methane fermentation, a dehydrator for dewatering digested sludge generated by methane fermentation to produce a dehydrated cake, and an electrolysis tank for electrolyzing and removing water contained in the dehydrated cake An organic waste treatment system characterized by comprising:
5. The treatment system according to claim 4, wherein a separation device for separating oxygen and chlorine generated on the anode side by the electrolysis, a line for introducing the separated oxygen into a waste liquid treatment facility for methane fermentation, and the separation A sterilization tank that sterilizes the waste liquid by aerating the generated chlorine into the waste liquid after dehydration, and further, the hydrogen generated on the cathode side by the electrolysis is used for a fuel cell power generator, a gas engine generator, etc. An organic waste treatment system comprising a configuration in which electricity introduced into a fuel gas line is supplied to the electrolysis tank.
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| JP2011235218A (en) * | 2010-05-07 | 2011-11-24 | Omega:Kk | Method for treating water-containing waste |
| JP2013004171A (en) * | 2011-06-10 | 2013-01-07 | Omega:Kk | Fuel cell |
| JP2013503457A (en) * | 2009-08-27 | 2013-01-31 | マクアリスター テクノロジーズ エルエルシー | Systems and methods for sustainable economic development through integrated full spectrum production of renewable energy |
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