WO2012046476A1 - Biological liquid waste treatment apparatus and biological liquid waste treatment method - Google Patents
Biological liquid waste treatment apparatus and biological liquid waste treatment method Download PDFInfo
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- WO2012046476A1 WO2012046476A1 PCT/JP2011/064177 JP2011064177W WO2012046476A1 WO 2012046476 A1 WO2012046476 A1 WO 2012046476A1 JP 2011064177 W JP2011064177 W JP 2011064177W WO 2012046476 A1 WO2012046476 A1 WO 2012046476A1
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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
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/006—Regulation methods for biological treatment
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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
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/28—Anaerobic digestion processes
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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
- C02F2101/00—Nature of the contaminant
- C02F2101/30—Organic compounds
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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
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/32—Nature of the water, waste water, sewage or sludge to be treated from the food or foodstuff industry, e.g. brewery waste waters
- C02F2103/322—Nature of the water, waste water, sewage or sludge to be treated from the food or foodstuff industry, e.g. brewery waste waters from vegetable oil production, e.g. olive oil production
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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
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/28—Anaerobic digestion processes
- C02F3/2846—Anaerobic digestion processes using upflow anaerobic sludge blanket [UASB] reactors
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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
Definitions
- the present invention relates to a biological wastewater treatment apparatus and a biological wastewater treatment method for decomposing organic matter in fat and oil containing wastewater.
- the methane fermentation apparatus 2 has a methane fermentation tank 4 and introduces the low-concentration fat / oil drainage separated by the oil concentration / separation apparatus 1 into the methane fermentation tank 4 via the line L1.
- the methane fermentation tank 4 contains a microbial sludge bed 5 containing microorganisms aggregated in a granular form (here, methane bacteria).
- the methane bacteria decompose methane gas by decomposing organic matter in the water to be treated under anaerobic conditions. Is generated.
- the fat and oil decomposition apparatus 3 sends the treated water whose fat and oil concentration became low by the fat and oil decomposition in the fat and oil decomposition tank 7 to the methane fermentation tank 4 through the line L7.
- the fat and oil state acquisition means 10 acquires the fat and oil concentration in the fat and oil decomposition tank 7 You may do.
- the stirring state of the stirring device 11 is determined based only on the fat and oil concentration without considering the fluctuation of the amount of water flowing into the fat and oil decomposition tank 7. It may be changed.
- the methane fermentation tank 4 comprises the EGSB reaction tank
- produces methane gas for example, UASB (Upflow Anaerobic Sludge Blanket) You may comprise the reaction tank.
- the oil and fat separated from the oil and fat-containing wastewater can be sufficiently decomposed.
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- Engineering & Computer Science (AREA)
- Biodiversity & Conservation Biology (AREA)
- Hydrology & Water Resources (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Molecular Biology (AREA)
- Health & Medical Sciences (AREA)
- Physical Water Treatments (AREA)
- Activated Sludge Processes (AREA)
- Purification Treatments By Anaerobic Or Anaerobic And Aerobic Bacteria Or Animals (AREA)
Abstract
Liquid waste containing an oil or fat is separated into liquid waste containing the oil or fat at a lower concentration and liquid waste containing the oil or fat at a higher concentration by means of an oil or fat concentration/separation apparatus, the liquid waste containing the oil or fat at a lower concentration is introduced into a methane fermentation apparatus and is subjected to a methane fermentation treatment using microbial sludge, the liquid waste containing the oil or fat at a higher concentration is introduced into an oil or fat decomposition apparatus and is stirred by means of a stirring apparatus, the state of the oil or fat in the liquid waste containing the oil or fat at a higher concentration is acquired by means of an oil or fat state acquisition means, and the stirring condition for the stirring apparatus is altered in accordance with the state of the oil or fat. In this manner, the formation of masses of the oil or fat can be prevented and the oil or fat contained in the liquid waste containing the oil or fat at a higher concentration can be reliably decomposed using the microbial sludge.
Description
本発明は、油脂含有排水中の有機物を分解する生物学的排水処理装置及び生物学的排水処理方法に関する。
The present invention relates to a biological wastewater treatment apparatus and a biological wastewater treatment method for decomposing organic matter in fat and oil containing wastewater.
排水中の有機物を分解する生物学的排水処理装置としては、排水のメタン発酵処理を行うものが知られている。このような生物学的排水処理装置では、排水の油脂濃度が高い場合にメタン発酵処理が阻害される場合があった。即ち、排水中の油脂濃度が高くなると、メタン菌が油脂と共に浮上し、メタン発酵処理槽外へ流出してしまう場合があった。また、メタン菌が油脂に覆われ、有機物を分解するメタン菌の能力が損なわれる場合があった。このような問題を解決する生物学的排水処理装置として、油脂含有排水を導入し、低濃度油脂排水及び高濃度油脂排水に分離する油脂濃縮分離装置と、分離された低濃度油脂排水を導入し、微生物汚泥を用いて低濃度油脂排水のメタン発酵処理を行うメタン発酵装置と、分離された高濃度油脂排水を導入し、微生物汚泥を用いて高濃度油脂排水中の油脂を分解する油脂分解装置と、油脂分解装置に導入された高濃度油脂排水を攪拌する攪拌装置とを備えたものが知られている（例えば、特許文献１参照）。
A biological wastewater treatment device that decomposes organic matter in wastewater is known to perform wastewater methane fermentation treatment. In such a biological wastewater treatment apparatus, the methane fermentation treatment may be hindered when the fat and oil concentration of the wastewater is high. That is, when the concentration of fats and oils in the wastewater increases, methane bacteria may float with the fats and oils and flow out of the methane fermentation treatment tank. In addition, methane bacteria are covered with oils and fats, and the ability of methane bacteria to decompose organic matter may be impaired. As a biological wastewater treatment device that solves such problems, an oil-containing wastewater is introduced, and a fat concentration separator that separates into a low-concentration fat wastewater and a high-concentration fat wastewater, and a separated low-concentration fat wastewater are introduced. , A methane fermentation device that performs methane fermentation of low-concentration fat wastewater using microbial sludge, and an oil decomposition device that introduces the separated high-concentration fat wastewater and decomposes fats and oils in high-concentration fat wastewater using microbial sludge And a stirrer that stirs high-concentration fat and oil wastewater introduced into the fat and oil decomposer (see, for example, Patent Document 1).
上記装置では、高濃度油脂排水中に油脂の塊が形成され、油脂分解装置内の微生物汚泥が油脂に作用し難くなり、油脂分解装置内の油脂が十分に分解されない場合があった。
In the above apparatus, a lump of fat and oil is formed in the high-concentration fat and oil waste water, the microbial sludge in the fat and oil decomposition apparatus becomes difficult to act on the fat and oil, and the fat and oil in the fat and oil decomposition apparatus may not be sufficiently decomposed.
本発明は、このような課題を解決するためになされたものであり、油脂含有排水から分離した油脂を十分に分解することができる生物学的排水処理装置及び生物学的排水処理方法の提供を目的とする。
The present invention has been made to solve such problems, and provides a biological wastewater treatment apparatus and a biological wastewater treatment method capable of sufficiently decomposing oil and fat separated from fat and oil-containing wastewater. Objective.
本発明の一形態による生物学的排水処理装置は、油脂含有排水中の有機物を分解する生物学的排水処理装置において、油脂含有排水を導入し、低濃度油脂排水と高濃度油脂排水とに分離する油脂濃縮分離装置と、低濃度油脂排水を導入し、微生物汚泥を用いて低濃度油脂排水のメタン発酵処理を行うメタン発酵装置と、高濃度油脂排水を導入し、微生物汚泥を用いて高濃度油脂排水中の油脂を分解する油脂分解装置と、を備え、油脂分解装置は、油脂分解装置に導入された高濃度油脂排水を攪拌する攪拌装置と、高濃度油脂排水中の油脂の状態を取得する油脂状態取得手段と、油脂状態取得手段によって取得された油脂の状態に応じ、攪拌装置の攪拌状態を変化させる制御装置と、を有することを特徴とする。
A biological wastewater treatment apparatus according to an embodiment of the present invention is a biological wastewater treatment apparatus that decomposes organic matter in oil-containing wastewater, introduces oil-containing wastewater, and separates into low-concentration fat wastewater and high-concentration fat wastewater. The oil concentration / separation device and the low concentration oil wastewater are introduced, the methane fermentation device that performs the methane fermentation treatment of the low concentration oil wastewater using the microbial sludge, the high concentration oil fat wastewater is introduced, and the high concentration using the microorganism sludge An oil and fat decomposition device that decomposes fats and oils in the oil and fat wastewater, and the oil and fat decomposition device acquires the state of the fats and oils in the high concentration fat and oil wastewater and the stirring device that stirs the high concentration fat and oil wastewater introduced into the oil and fat decomposition device And a control device that changes the stirring state of the stirring device in accordance with the state of the oil and fat acquired by the fat and oil state acquisition unit.
また、本発明の一形態による生物学的排水処理方法は、油脂含有排水中の有機物を分解する生物学的排水処理方法において、油脂含有排水を油脂濃縮分離装置に導入し、低濃度油脂排水と高濃度油脂排水とに分離し、低濃度油脂排水をメタン発酵装置に導入し、微生物汚泥を用いて低濃度油脂排水のメタン発酵処理を行い、高濃度油脂排水を油脂分解装置に導入し、高濃度油脂排水と微生物汚泥とを攪拌装置により攪拌し、高濃度油脂排水中の油脂の状態を取得し、当該取得結果に応じて高濃度油脂排水の攪拌状態を変化させ、高濃度油脂排水中の油脂を分解することを特徴とする。
Moreover, the biological wastewater treatment method according to one aspect of the present invention is a biological wastewater treatment method for decomposing organic matter in oil-containing wastewater, wherein the oil-containing wastewater is introduced into an oil concentration separator, Separated into high-concentration fat wastewater, introduced low-concentration fat wastewater into methane fermentation equipment, performed methane fermentation treatment of low-concentration fat wastewater using microbial sludge, introduced high-concentration fat wastewater into fat and oil decomposition equipment, Concentrated fat and oil wastewater and microbial sludge are agitated by a stirrer, and the state of fat and oil in the high concentration fat and oil wastewater is acquired, and the stirring state of the high concentration fat and oil wastewater is changed according to the acquisition result, It is characterized by decomposing oils and fats.
このような生物学的排水処理装置及び生物学的排水処理方法によれば、油脂含有排水は、油脂濃縮分離装置により、低濃度油脂排水と高濃度油脂排水とに分離され、この油脂濃縮分離装置で分離された低濃度油脂排水がメタン発酵装置によってメタン発酵されるため、メタン発酵処理が油脂に阻害されず、低濃度油脂排水中の有機物が確実に分解され且つ十分なメタンガスが回収される。一方、油脂濃縮分離装置で分離された高濃度油脂排水は、油脂分解装置に導入され、攪拌装置によって攪拌されるため、高濃度油脂排水中における油脂の塊の形成が抑制される。このとき、油脂状態取得手段によって取得された油脂の状態に応じ、攪拌装置の攪拌状態が変化させられるため、高濃度油脂排水中における油脂の塊の形成がより確実に抑制される。従って、油脂分解装置内の微生物汚泥が油脂に作用し易くなり、高濃度排水中の油脂が十分に分解される。このようにして、油脂分解装置の処理水の油脂濃度は十分に低くなるため、当該処理水をメタン発酵装置へ送り、油脂に阻害されることなくメタン発酵処理を行うことができる。また、油脂分解装置の処理水中に残っている有機物が少ない場合には、メタン発酵装置の処理水とともにメタン発酵装置の後段に送ることができる。
According to such a biological wastewater treatment device and biological wastewater treatment method, the fat-containing wastewater is separated into the low-concentration fat wastewater and the high-concentration fat wastewater by the fat concentration separation device. Since the low-concentration fat and oil wastewater separated in step 1 is subjected to methane fermentation by the methane fermentation apparatus, the methane fermentation treatment is not inhibited by the fat and oil, the organic matter in the low-concentration fat and oil wastewater is reliably decomposed, and sufficient methane gas is recovered. On the other hand, since the high-concentration fat and oil waste water separated by the fat and oil concentration separation device is introduced into the fat and oil decomposition device and stirred by the stirring device, the formation of fat and oil lump in the high-concentration fat and oil waste water is suppressed. At this time, since the stirring state of the stirring device is changed according to the state of the oil and fat acquired by the oil and fat state acquisition means, the formation of the fat and oil lump in the high-concentration fat and oil waste water is more reliably suppressed. Therefore, the microbial sludge in the oil and fat decomposition apparatus easily acts on the oil and fat, and the oil and fat in the high-concentration waste water is sufficiently decomposed. Thus, since the fat and oil density | concentration of the treated water of a fat and oil decomposition apparatus becomes low enough, the said treated water can be sent to a methane fermentation apparatus, and a methane fermentation process can be performed, without being inhibited by fats and oils. Moreover, when there is little organic substance remaining in the treated water of an oil-and-fat decomposer, it can send to the back | latter stage of a methane fermentation apparatus with the treated water of a methane fermentation apparatus.
ここで、油脂状態取得手段は、高濃度油脂排水中の油脂の状態として、高濃度油脂排水の油脂濃度を取得するようにしてもよい。この場合、測定の容易な油脂濃度に基づき、高濃度油脂排水中の油脂の状態が取得されるため、油脂状態取得手段の構成を簡易にすることができる。
Here, the fat and oil state acquisition means may acquire the fat and oil concentration of the high concentration fat and oil waste water as the fat and oil state in the high concentration fat and oil waste water. In this case, since the state of the fats and oils in the high-concentration fat drainage is acquired based on the easily measured fat and oil concentration, the configuration of the fat and oil state acquisition unit can be simplified.
また、油脂状態取得手段は、高濃度油脂排水中の油脂の状態として、高濃度油脂排水中の油脂粒子の大きさを取得するようにしてもよい。この場合、油脂の塊の形成状態が直接的に測定され、その状態に応じて攪拌装置の攪拌状態が変えられるため、高濃度油脂排水中における塊の形成が一層確実に抑制される。
Further, the oil / fat state obtaining means may obtain the size of the oil / fat particles in the high-concentration fat / oil drainage as the state of the oil / fat in the high-concentration fat / oil drainage. In this case, since the formation state of the fat and oil lump is directly measured and the stirring state of the stirring device is changed according to the state, formation of the lump in the high-concentration fat and oil waste water is further reliably suppressed.
ここで、上記作用を効果的に奏する構成として、油脂状態取得手段は、油脂分解装置内の高濃度油脂排水の一部を採取するサンプリング部と、サンプリング部により採取された高濃度油脂排水の画像を撮影する撮像部と、撮像部によって撮影された画像に画像処理を施し油脂粒子の大きさを取得する画像処理部と、を有するものが挙げられる。
Here, as a configuration that effectively achieves the above-described operation, the oil and fat state acquisition means includes a sampling unit that collects a part of the high-concentration fat drainage in the fat and oil decomposition apparatus, and an image of the high-concentration fat drainage collected by the sampling unit. And an image processing unit that performs image processing on an image captured by the imaging unit to acquire the size of the fat and oil particles.
また、油脂分解装置で用いられる微生物汚泥は、リパーゼを生成し且つ脂肪酸を分解する能力を有するようにしてもよい。この場合、高濃度油脂排水中の油脂が高効率且つ確実に分解される。
Moreover, the microbial sludge used in the oil and fat decomposition apparatus may have the ability to generate lipase and decompose fatty acids. In this case, the fat and oil in the high-concentration fat and oil waste water is decomposed with high efficiency and reliability.
このように本発明の一形態によれば、油脂含有排水から分離した油脂を十分に分解することができる。
Thus, according to one aspect of the present invention, the oil and fat separated from the oil and fat-containing wastewater can be sufficiently decomposed.
以下、本発明による生物学的排水処理方法を採用した生物学的排水処理装置の好適な実施形態について添付図面を参照しながら説明する。なお、各図において、同一の要素には同一の符号を付し、重複する説明は省略する。
Hereinafter, a preferred embodiment of a biological wastewater treatment apparatus employing a biological wastewater treatment method according to the present invention will be described with reference to the accompanying drawings. Note that, in each drawing, the same elements are denoted by the same reference numerals, and redundant description is omitted.
先ず、本発明による生物学的排水処理装置の第１実施形態を説明する。図１は、本発明の第１実施形態に係る生物学的排水処理方法を採用した生物学的排水処理装置１００の概略構成図である。
First, a first embodiment of a biological wastewater treatment apparatus according to the present invention will be described. FIG. 1 is a schematic configuration diagram of a biological wastewater treatment apparatus 100 that employs the biological wastewater treatment method according to the first embodiment of the present invention.
生物学的排水処理装置１００は、油脂含有排水を導入し、低濃度油脂排水と高濃度油脂排水とに分離する油脂濃縮分離装置１と、低濃度油脂排水のメタン発酵処理を行うメタン発酵装置２と、高濃度油脂排水中の油脂を分解する油脂分解装置３とを備えている。
The biological wastewater treatment device 100 introduces fat-containing wastewater, and separates the oil concentration separator 1 into a low-concentration fat wastewater and a high-concentration fat wastewater, and a methane fermentation device 2 that performs methane fermentation treatment of the low-concentration fat wastewater. And a fat and oil decomposition apparatus 3 for decomposing the fat and oil in the high concentration fat and oil waste water.
油脂濃縮分離装置１としては、例えば、加圧浮上濃縮装置、常圧浮上濃縮装置、ＡＰＩオイルトラップ（oil trap）等を用いることができる。
As the oil and fat concentrating / separating apparatus 1, for example, a pressurized levitation concentrating apparatus, an atmospheric levitation concentrating apparatus, an API oil trap or the like can be used.
メタン発酵装置２は、メタン発酵槽４を有し、油脂濃縮分離装置１で分離された低濃度油脂排水を、ラインＬ１を介してメタン発酵槽４内に導入する。メタン発酵槽４は、粒状に凝集された微生物（ここではメタン菌）を含む微生物汚泥床５を収容しており、メタン菌は、嫌気的条件下において、被処理水中の有機物を分解してメタンガスを生成する。
The methane fermentation apparatus 2 has a methane fermentation tank 4 and introduces the low-concentration fat / oil drainage separated by the oil concentration / separation apparatus 1 into the methane fermentation tank 4 via the line L1. The methane fermentation tank 4 contains a microbial sludge bed 5 containing microorganisms aggregated in a granular form (here, methane bacteria). The methane bacteria decompose methane gas by decomposing organic matter in the water to be treated under anaerobic conditions. Is generated.
メタン発酵装置２は、ＥＧＳＢ（Expanded Granular Sludge Bed）反応槽を構成し、メタン発酵槽４内に導入した低濃度油脂排水を高速に上昇させることで、メタン発酵槽４内に高速の上向流を形成する。微生物汚泥床５は、メタン発酵槽４内の上向流により流動して膨張し、低濃度油脂排水に対し高負荷状態を構成する。
The methane fermentation apparatus 2 constitutes an EGSB (Expanded Granular Sludge Bed) reaction tank, and raises the low-concentration fat and oil wastewater introduced into the methane fermentation tank 4 at a high speed, thereby causing a high-speed upward flow in the methane fermentation tank 4. Form. The microbial sludge bed 5 flows and expands due to the upward flow in the methane fermentation tank 4, and constitutes a high load state with respect to the low-concentration fat and oil drainage.
メタン発酵槽４内の上部には、微生物等の固形物と、メタン発酵槽４内で発生したメタンガス等のガスと、メタン発酵処理された処理水とを分離する気固液分離部６が設けられている。メタン発酵装置２は、気固液分離部６によって分離された処理水をラインＬ２へ排出し、ガスをラインＬ３へ排出する。
In the upper part of the methane fermentation tank 4, there is provided a gas-solid-liquid separation unit 6 that separates solids such as microorganisms, gas such as methane gas generated in the methane fermentation tank 4, and treated water subjected to methane fermentation treatment. It has been. The methane fermentation apparatus 2 discharges the treated water separated by the gas-solid-liquid separator 6 to the line L2, and discharges the gas to the line L3.
油脂分解装置３は、油脂分解槽７と、撹拌装置１１と、ガス供給源Ｂ１と、油脂状態取得手段１０と、制御装置９とを有する。油脂分解装置３は、油脂濃縮分離装置１で分離された高濃度油脂排水を、ラインＬ５を介して油脂分解槽７内に導入すると共に、ラインＬ６を介し、ガス供給源Ｂ１から油脂分解槽７内に酸素含有ガスを供給する。なお、油脂分解装置３は、油脂分解槽７内に酸素含有ガスを供給せず、嫌気的条件下で油脂を分解するものであってもよい。
The fat and oil decomposition apparatus 3 includes an oil and fat decomposition tank 7, a stirring device 11, a gas supply source B 1, an oil and fat state acquisition unit 10, and a control device 9. The fat and oil decomposing apparatus 3 introduces the high-concentration fat and oil waste water separated by the fat and oil concentrating and separating apparatus 1 into the fat and oil decomposing tank 7 through the line L5 and from the gas supply source B1 through the line L6. An oxygen-containing gas is supplied inside. In addition, the fats and oils decomposition apparatus 3 may decompose | disassemble fats and oils under anaerobic conditions, without supplying oxygen-containing gas in the fats and oils decomposition tank 7. FIG.
油脂分解槽７は、リパーゼ生産菌（例えば、アシネトバクター属）及び脂肪酸分解菌（例えば、シュードモナス属、バチルス属）を含む微生物汚泥を収容している。リパーゼ生産菌は、好気的条件下においてリパーゼを生成する。リパーゼは、油脂のエステル結合を分解し、脂肪酸を生成する。脂肪酸分解菌は、好気的条件下において脂肪酸を分解する。なお、油脂分解槽７に収容された微生物汚泥は、リパーゼを生成し、かつ脂肪酸を分解する性質を併せ持つ菌（例えば、バチルス属）を含むものであってもよい。
The oil and fat decomposition tank 7 contains microbial sludge containing lipase-producing bacteria (for example, Acinetobacter genus) and fatty acid-degrading bacteria (for example, Pseudomonas genus, Bacillus genus). Lipase producing bacteria produce lipase under aerobic conditions. Lipase breaks down ester bonds in fats and oils to produce fatty acids. Fatty acid-degrading bacteria degrade fatty acids under aerobic conditions. In addition, the microbial sludge accommodated in the fats-and-oils decomposition tank 7 may contain the microbe (for example, Bacillus genus) which has a property which produces | generates a lipase and decomposes | disassembles a fatty acid.
油脂分解槽７内には、複数の多孔板８が高さ方向に並設されており、各多孔板８は、シャフト２７を介して駆動装置２６に接続され、駆動装置２６を作動させることによって上下に往復運動するようになっている。上下に往復運動する各多孔板８は、油脂分解槽７内に導入された高濃度油脂排水と衝突し、油脂分解槽７内の略全域に乱流を形成する。この乱流により、高濃度油脂排水、上記微生物汚泥及び酸素含有ガスが撹拌される。このように、多孔板８、駆動装置２６及びシャフト２７は、油脂分解装置３に導入された高濃度油脂排水を攪拌する攪拌装置１１を構成している。
A plurality of perforated plates 8 are juxtaposed in the height direction in the fat and oil decomposition tank 7, and each perforated plate 8 is connected to a drive device 26 through a shaft 27 and operates the drive device 26. It is designed to reciprocate up and down. Each of the perforated plates 8 reciprocating up and down collides with high-concentration fat and oil drainage introduced into the fat and oil decomposition tank 7 and forms a turbulent flow in substantially the entire area of the fat and oil decomposition tank 7. Due to this turbulent flow, the high-concentration fat drainage, the microbial sludge and the oxygen-containing gas are agitated. As described above, the perforated plate 8, the drive device 26, and the shaft 27 constitute the stirring device 11 that stirs the high-concentration fat and oil waste introduced into the fat and oil decomposition device 3.
油脂状態取得手段１０は、高濃度油脂排水中の油脂の状態として、ラインＬ５を流れ油脂分解槽７に導入される高濃度油脂排水の油脂濃度及び流入水量を取得する。油脂濃度の取得には、例えば、赤外線センサーや臭気センサー等を用いることができる。
The oil / fat state acquisition means 10 acquires the oil / fat concentration and inflow water amount of the high-concentration oil / fat drainage that flows through the line L5 and is introduced into the oil / fat decomposition tank 7 as the state of the oil / fat in the high-concentration fat / oil discharge. For example, an infrared sensor, an odor sensor, or the like can be used to acquire the fat concentration.
制御装置９は、油脂状態取得手段１０からの情報に基づいて、撹拌装置１１の撹拌状態及びガス供給源Ｂ１のガス供給を制御する。すなわち、制御装置９は、油脂状態取得手段１０によって取得された油脂の状態に応じ、駆動装置２６を制御して多孔板８の往復運動の周期を変化させ、攪拌装置１１の攪拌状態を変化させる。また、制御装置９は、油脂状態取得手段１０によって取得された油脂の状態に応じ、ガス供給源Ｂ１のガス供給量を制御し、油脂分解槽７へのガス供給量を変化させる。
The control device 9 controls the stirring state of the stirring device 11 and the gas supply of the gas supply source B1 based on the information from the oil / fat state acquisition means 10. That is, the control device 9 controls the driving device 26 according to the state of the oil / fat acquired by the oil / fat state acquisition means 10 to change the cycle of the reciprocating motion of the perforated plate 8 and change the stirring state of the stirring device 11. . Further, the control device 9 controls the gas supply amount of the gas supply source B <b> 1 according to the state of the oil / fat acquired by the oil / fat state acquisition means 10, and changes the gas supply amount to the oil / fat decomposition tank 7.
そして、油脂分解装置３は、油脂分解槽７内における油脂分解で油脂濃度が低くなった処理水を、ラインＬ７を介してメタン発酵槽４へ送る。
And the fat and oil decomposition apparatus 3 sends the treated water whose fat and oil concentration became low by the fat and oil decomposition in the fat and oil decomposition tank 7 to the methane fermentation tank 4 through the line L7.
続いて、このように構成された生物学的排水処理装置１００の作用について説明する。油脂含有排水は、油脂濃縮分離装置１内に導入され、低濃度油脂排水と高濃度油脂排水とに分離される。油脂濃縮分離装置１で分離された低濃度油脂排水は、メタン発酵装置２のメタン発酵槽４内に導入され、微生物汚泥床５と高効率に向流接触し、高効率にメタン発酵処理される。メタン発酵槽４内を上昇してメタン発酵処理された処理水は、気固液分離部６によってメタンガスや微生物等から分離され、メタン発酵槽４から排出される。気固液分離部６によって分離されたメタンガス等のガスは、メタン発酵槽４外へ排出され、エネルギー資源として回収される。
Subsequently, the operation of the biological wastewater treatment apparatus 100 configured as described above will be described. The fat and oil-containing wastewater is introduced into the fat and oil concentration separator 1 and separated into a low-concentration fat and oil wastewater and a high-concentration fat and oil wastewater. The low-concentration fat and oil waste water separated by the fat concentration and separation apparatus 1 is introduced into the methane fermentation tank 4 of the methane fermentation apparatus 2 and is brought into countercurrent contact with the microbial sludge bed 5 and subjected to methane fermentation treatment with high efficiency. . The treated water that has gone up in the methane fermentation tank 4 and has been subjected to the methane fermentation process is separated from methane gas, microorganisms, and the like by the gas-solid liquid separation unit 6 and discharged from the methane fermentation tank 4. Gases such as methane gas separated by the gas-solid-liquid separation unit 6 are discharged out of the methane fermentation tank 4 and recovered as energy resources.
一方、油脂濃縮分離装置１で分離された高濃度油脂排水は、油脂分解装置３の油脂分解槽７内に導入され、油脂分解槽７内の微生物汚泥、及びガス供給源Ｂ１から供給された酸素含有ガスと混合される。高濃度油脂排水、微生物汚泥及び酸素含有ガスは、油脂分解槽７内を上下に往復運動する多孔板８との衝突で形成された乱流により、十分に攪拌される。この攪拌により、油脂分解槽７においては、高濃度油脂排水中における油脂の塊の形成が抑制される。
On the other hand, the high-concentration fat drainage separated by the fat concentration separation apparatus 1 is introduced into the fat decomposition tank 7 of the fat decomposition apparatus 3, and the microbial sludge in the fat decomposition tank 7 and the oxygen supplied from the gas supply source B1. Mixed with the contained gas. The high-concentration fat and oil drainage, microbial sludge and oxygen-containing gas are sufficiently stirred by the turbulent flow formed by the collision with the perforated plate 8 reciprocating up and down in the fat and oil decomposition tank 7. By this stirring, in the fat and oil decomposition tank 7, formation of fat and oil lump in the high concentration fat and oil waste water is suppressed.
ここで、特に本実施形態の特徴をなす制御装置９による撹拌装置１１の撹拌状態及びガス供給源Ｂ１のガス供給量の制御手順を説明する。図２は、図１中の制御装置９の制御手順を示すフローチャートである。まず、油脂状態取得手段１０により、油脂分解槽７に流入する高濃度油脂排水の油脂濃度及び流入水量を取得する（ステップＳ１，Ｓ２）。次に、取得した高濃度油脂排水の油脂濃度及び流入水量に基づき、油脂分解槽７への油脂流入量を演算し（ステップＳ３）、油脂流入量に変化がないか（実際には、所定値以上の変化がないか）を判定する（ステップＳ４）。油脂流入量に変化がなければ、多孔板８の往復周期及びガス供給源Ｂ１のガス供給量を維持する（ステップＳ５）。一方、油脂流入量に変化があれば、油脂流入量が減っているかを判定する（ステップＳ６）。油脂流入量が減っていれば、多孔板８の往復周期及びガス供給源Ｂ１のガス供給量を下げ、駆動装置２６及びガス供給源Ｂ１の消費エネルギーを節約する（ステップＳ７）。一方、油脂流入量が増えていれば、多孔板８の往復周期を上げ、油脂流入量の増加に伴う油脂の塊の増加を抑制すると共に、ガス供給源Ｂ１のガス供給量を上げ、リパーゼ生産菌及び脂肪酸分解菌の好気性反応を加速し、油脂の分解速度を上げる（ステップＳ８）。制御装置９は、以上の処理を所定の周期で繰り返し行う。
Here, the control procedure of the stirring state of the stirring device 11 and the gas supply amount of the gas supply source B1 by the control device 9 that makes the feature of the present embodiment particularly, will be described. FIG. 2 is a flowchart showing a control procedure of the control device 9 in FIG. First, the oil / fat state acquisition means 10 acquires the oil / fat concentration and the inflow water amount of the high-concentration oil / fat drainage flowing into the oil / fat decomposition tank 7 (steps S1 and S2). Next, based on the oil concentration and the inflow water amount of the acquired high concentration oil drainage, the oil inflow amount to the oil decomposition tank 7 is calculated (step S3), and there is no change in the oil inflow amount (actually a predetermined value) It is determined whether there is any change described above (step S4). If there is no change in the amount of oil and fat inflow, the reciprocating cycle of the perforated plate 8 and the gas supply amount of the gas supply source B1 are maintained (step S5). On the other hand, if there is a change in the inflow amount of fats and oils, it is determined whether the inflow amount of fats and oils is reduced (step S6). If the oil and fat inflow amount is reduced, the reciprocating cycle of the perforated plate 8 and the gas supply amount of the gas supply source B1 are lowered to save energy consumed by the drive device 26 and the gas supply source B1 (step S7). On the other hand, if the oil inflow amount is increased, the reciprocating cycle of the perforated plate 8 is increased, the increase in the amount of oil and fat mass accompanying the increase in the oil inflow amount is suppressed, and the gas supply amount of the gas supply source B1 is increased. The aerobic reaction of bacteria and fatty acid-degrading bacteria is accelerated, and the decomposition rate of fats and oils is increased (step S8). The control device 9 repeats the above processing at a predetermined cycle.
このように、攪拌装置１１の攪拌状態は、制御装置９により、油脂状態取得手段１０によって取得された油脂の状態に応じ変化させられるため、高濃度油脂排水中における油脂の塊の形成がより確実に抑制される。従って、油脂分解装置３内の微生物汚泥が油脂に作用し易くなり、高濃度排水中の油脂が十分に分解される。
Thus, since the stirring state of the stirring device 11 is changed by the control device 9 according to the state of the fats and oils acquired by the fat and oil state acquiring means 10, the formation of the lump of fats and oils in the high concentration fat and oil drainage is more reliable. To be suppressed. Therefore, the microbial sludge in the fat and oil decomposition apparatus 3 easily acts on the fat and oil, and the fat and oil in the high-concentration waste water is sufficiently decomposed.
油脂分解槽７において油脂が分解された処理水は、メタン発酵槽４へ送られる。当該処理水は、油脂の分解によって十分に油脂濃度が低いものになっているため、油脂に阻害されることなくメタン発酵槽４内でメタン発酵処理される。これにより、油脂濃縮分離装置１において分離された低濃度油脂排水のメタン発酵処理で回収されるメタンガスに加え、さらに多くのメタンガスが回収される。
The treated water in which the fats and oils are decomposed in the fat and oil decomposition tank 7 is sent to the methane fermentation tank 4. Since the treated water has a sufficiently low fat concentration due to the decomposition of fats and oils, the treated water is subjected to methane fermentation treatment in the methane fermentation tank 4 without being inhibited by the fats and oils. Thereby, more methane gas is collect | recovered in addition to the methane gas collect | recovered by the methane fermentation process of the low concentration fat-oil waste water isolate | separated in the fat concentration separation apparatus 1. FIG.
このように、本実施形態においては、油脂含有排水から分離した油脂を十分に分解することができる。
Thus, in this embodiment, the fats and oils separated from the fat and oil-containing wastewater can be sufficiently decomposed.
また、本実施形態においては、油脂状態取得手段１０により、高濃度油脂排水中の油脂の状態として、油脂分解槽７に導入される高濃度油脂排水の油脂濃度及び流入水量が取得されており、油脂濃度及び流入水量を既存のセンサ類で容易に測定できるため、油脂状態取得手段１０の構成を簡易にすることができる。また、油脂分解槽７に導入される高濃度油脂排水は、油脂分解槽７内の微生物汚泥が混合されていないために油脂濃度を測定し易く、油脂状態取得手段１０の構成をより簡易にすることができる。なお、高濃度油脂排水に油脂分解槽７内の微生物汚泥が混合されていても油脂濃度の測定に支障がない場合には、油脂状態取得手段１０は、油脂分解槽７内の油脂濃度を取得するものであってもよい。この場合には、油脂分解槽７内の油脂濃度を直接的に取得できるため、油脂分解槽７内への流入水量の変動を考慮せず、油脂濃度のみに基づいて攪拌装置１１の攪拌状態を変化させてもよい。
Moreover, in this embodiment, the fat and oil concentration and inflow water amount of the high concentration fat and oil wastewater introduced into the fat and oil decomposition tank 7 are acquired as the fat and oil state in the high concentration fat and oil wastewater by the fat and oil state acquisition means 10. Since the oil and fat concentration and the inflow water amount can be easily measured with existing sensors, the configuration of the oil and fat state acquisition means 10 can be simplified. Moreover, since the high concentration fat drainage introduced into the fat decomposition tank 7 is not mixed with the microbial sludge in the fat decomposition tank 7, the fat concentration is easily measured, and the configuration of the fat state acquisition means 10 is further simplified. be able to. In addition, even if the microbial sludge in the fat and oil decomposition tank 7 is mixed with the high-concentration fat and oil waste water, if the measurement of the fat and oil concentration is not hindered, the fat and oil state acquisition means 10 acquires the fat and oil concentration in the fat and oil decomposition tank 7 You may do. In this case, since the fat and oil concentration in the fat and oil decomposition tank 7 can be directly obtained, the stirring state of the stirring device 11 is determined based only on the fat and oil concentration without considering the fluctuation of the amount of water flowing into the fat and oil decomposition tank 7. It may be changed.
また、油脂分解装置３で用いられる微生物汚泥は、リパーゼを生成し且つ脂肪酸を分解する能力を有するため、高濃度油脂排水中の油脂が高効率且つ確実に分解される。
Also, since the microbial sludge used in the fat and oil decomposition apparatus 3 has the ability to generate lipase and decompose fatty acids, the fats and oils in the high-concentration fat and oil waste can be decomposed with high efficiency and reliability.
また、メタン発酵装置２は、ＥＧＳＢ反応槽を構成しているため、メタン発酵処理を高負荷とすることができ、メタン発酵処理を高効率とすることができる。
Moreover, since the methane fermentation apparatus 2 constitutes an EGSB reaction tank, the methane fermentation process can be made highly loaded, and the methane fermentation process can be made highly efficient.
図３は、本発明の第２実施形態に係る生物学的排水処理方法を採用した生物学的排水処理装置２００の概略構成図である。
FIG. 3 is a schematic configuration diagram of a biological wastewater treatment apparatus 200 that employs the biological wastewater treatment method according to the second embodiment of the present invention.
第２実施形態の生物学的排水処理装置２００が第１実施形態の生物学的排水処理装置１００と違う点は、高濃度油脂排水の油脂濃度及び流入水量を取得する油脂状態取得手段１０を、高濃度油脂排水中の油脂粒子の大きさを取得する油脂状態取得手段２４に代えた点である。これに伴い制御装置９も制御装置２５に代えている。
The biological wastewater treatment apparatus 200 of the second embodiment is different from the biological wastewater treatment apparatus 100 of the first embodiment in that the fat and oil state obtaining means 10 for obtaining the fat concentration and inflow water amount of the high concentration fat and oil waste water is obtained. It is the point replaced with the oil-and-fat state acquisition means 24 which acquires the magnitude | size of the oil-and-fat particle | grains in high concentration fat and oil waste water. Accordingly, the control device 9 is also replaced with the control device 25.
この油脂状態取得手段２４は、油脂分解槽７内の高濃度油脂排水の一部を採取するサンプリング部２１と、採取された高濃度油脂排水の拡大画像を撮影する撮像部２２と、撮影された拡大画像に画像処理を施し油脂粒子の大きさを取得する画像処理部２３と、を有する。
This oil / fat state acquisition means 24 was photographed by a sampling unit 21 that collects a part of the high-concentration fat / oil drainage in the fat / oil decomposition tank 7, and an imaging unit 22 that captures an enlarged image of the collected high-concentration fat / oil drainage. And an image processing unit 23 that performs image processing on the enlarged image and acquires the size of the fat and oil particles.
制御装置２５は、油脂状態取得手段２４で取得された油脂粒子の大きさに応じ、攪拌装置１１の攪拌状態及びガス供給源Ｂ１のガス供給量を変化させる。図４は、図３中の制御装置２５の制御手順を示すフローチャートである。まず、油脂状態取得手段２４により、油脂分解槽７内に導入された高濃度油脂排水中の油脂粒子の大きさを取得する。すなわち、サンプリング部２１により、油脂分解槽７内の高濃度油脂排水の一部を採取し（ステップＳ２１）、撮像部２２により、採取された高濃度油脂排水の拡大画像を撮影し（ステップＳ２２）、画像処理部２３により、撮影された拡大画像に画像処理を施し油脂粒子の大きさを取得する（ステップＳ２３）。次に、油脂粒子の大きさが所定の大きさ（ここでは１００μｍ）以下であるかを判定する（ステップＳ２４）。油脂粒子の大きさが１００μｍ以下であれば、多孔板８の往復周期及びガス供給源Ｂ１のガス供給量を所定値よりも小さく設定し、駆動装置２６及びガス供給源Ｂ１の消費エネルギーを節約する（ステップＳ２５）。一方、粒子の大きさが１００μｍよりも大きければ、多孔板８の往復周期を所定値よりも大きく設定し、油脂の塊の増加を抑制すると共に、ガス供給源Ｂ１のガス供給量を所定値よりも大きく設定し、油脂の分解速度を上げる（ステップＳ２６）。制御装置２５は、以上の処理を所定の周期で繰り返し行う。
The control device 25 changes the stirring state of the stirring device 11 and the gas supply amount of the gas supply source B1 according to the size of the fat and oil particles acquired by the fat and oil state acquisition means 24. FIG. 4 is a flowchart showing a control procedure of the control device 25 in FIG. First, the fat and oil state acquisition means 24 acquires the size of the fat and oil particles in the high-concentration fat and oil wastewater introduced into the fat and oil decomposition tank 7. That is, a part of the high-concentration fat drainage in the fat / oil decomposition tank 7 is sampled by the sampling unit 21 (step S21), and an enlarged image of the collected high-concentration fat drainage is taken by the imaging unit 22 (step S22). Then, the image processing unit 23 performs image processing on the captured enlarged image to acquire the size of the oil and fat particles (step S23). Next, it is determined whether the size of the fat and oil particles is equal to or smaller than a predetermined size (here, 100 μm) (step S24). If the size of the fat and oil particles is 100 μm or less, the reciprocating cycle of the perforated plate 8 and the gas supply amount of the gas supply source B1 are set to be smaller than predetermined values, and the energy consumption of the driving device 26 and the gas supply source B1 is saved. (Step S25). On the other hand, if the size of the particles is larger than 100 μm, the reciprocating cycle of the porous plate 8 is set to be larger than a predetermined value, and the increase in fat and oil mass is suppressed, and the gas supply amount of the gas supply source B1 is less than the predetermined value Is set to a large value to increase the decomposition speed of the oil (step S26). The control device 25 repeatedly performs the above processing at a predetermined cycle.
このように、本実施形態においては、油脂状態取得手段２４により、高濃度油脂排水中の油脂の状態として、高濃度油脂排水中の油脂粒子の大きさが取得されており、油脂の塊の形成状態が直接的に取得されている。そして、攪拌装置１１の攪拌状態は、直接的に取得された油脂の塊の形成状態に応じて変化させられるため、高濃度油脂排水中における塊の形成が一層確実に抑制される。
Thus, in this embodiment, the size of the fat particles in the high-concentration fat drainage is acquired as the state of the fats and oils in the high-concentration fat drainage by the fat state acquisition means 24, and the formation of a lump of fats and oils The state is obtained directly. And since the stirring state of the stirring apparatus 11 is changed according to the formation state of the lump of fats and oils acquired directly, formation of the lump in high concentration fat and oil wastewater is suppressed more reliably.
また、油脂分解装置３は、処理水をメタン発酵槽４へ送っているが、処理水の有機物濃度が極めて低い場合には、メタン発酵装置２の処理水と共にメタン発酵装置２の後段へ送るようにしても良い。
Moreover, although the fats and oils decomposition apparatus 3 is sending the treated water to the methane fermentation tank 4, when the organic substance density | concentration of treated water is very low, it seems to send to the back | latter stage of the methane fermentation apparatus 2 with the treated water of the methane fermentation apparatus 2. Anyway.
また、攪拌装置１１は、多孔板８、駆動装置２６及びシャフト２７によって構成されているが、油脂分解槽７に設置された撹拌翼（例えば、プロペラ翼、パドル翼、タービン翼、アンカー翼）及びその動力源によって構成されていてもよい。この場合、多孔板８の往復周期を上げるのに代えて撹拌翼の回転速度を上げ、多孔板８の往復周期を下げるのに代えて撹拌翼の回転速度を下げるのが好ましい。
The stirring device 11 includes the perforated plate 8, the drive device 26, and the shaft 27. The stirring blades (for example, propeller blades, paddle blades, turbine blades, anchor blades) installed in the oil decomposition tank 7 and You may be comprised by the power source. In this case, it is preferable to increase the rotation speed of the stirring blade instead of increasing the reciprocation period of the porous plate 8 and decrease the rotation speed of the stirring blade instead of decreasing the reciprocation period of the porous plate 8.
また、メタン発酵槽４は、ＥＧＳＢ反応槽を構成しているが、嫌気性反応によって有機物を分解してメタンガスを発生する反応槽を構成していればよく、例えば、ＵＡＳＢ（Upflow Anaerobic Sludge Blanket）反応槽を構成していてもよい。
Moreover, although the methane fermentation tank 4 comprises the EGSB reaction tank, what is necessary is just to comprise the reaction tank which decomposes | disassembles organic substance by anaerobic reaction and generate | occur | produces methane gas, for example, UASB (Upflow Anaerobic Sludge Blanket) You may comprise the reaction tank.
本発明の一形態によれば、油脂含有排水から分離した油脂を十分に分解することができる。
According to one embodiment of the present invention, the oil and fat separated from the oil and fat-containing wastewater can be sufficiently decomposed.
１…油脂濃縮分離装置、２…メタン発酵装置、３…油脂分解装置、９…制御装置、１０…油脂状態取得手段、１１…攪拌装置、１００…生物学的排水処理装置。
DESCRIPTION OF SYMBOLS 1 ... Oil concentration and separation apparatus, 2 ... Methane fermentation apparatus, 3 ... Oil and fat decomposition apparatus, 9 ... Control apparatus, 10 ... Oil state acquisition means, 11 ... Stirrer, 100 ... Biological waste water treatment apparatus.
Claims (6)
- 油脂含有排水中の有機物を分解する生物学的排水処理装置において、
前記油脂含有排水を導入し、低濃度油脂排水と高濃度油脂排水とに分離する油脂濃縮分離装置と、
前記低濃度油脂排水を導入し、微生物汚泥を用いて前記低濃度油脂排水のメタン発酵処理を行うメタン発酵装置と、
前記高濃度油脂排水を導入し、微生物汚泥を用いて前記高濃度油脂排水中の油脂を分解する油脂分解装置と、を備え、
前記油脂分解装置は、前記油脂分解装置に導入された前記高濃度油脂排水を攪拌する攪拌装置と、前記高濃度油脂排水中の前記油脂の状態を取得する油脂状態取得手段と、前記油脂状態取得手段によって取得された前記油脂の状態に応じ、前記攪拌装置の攪拌状態を変化させる制御装置と、を有することを特徴とする生物学的排水処理装置。 In biological wastewater treatment equipment that decomposes organic matter in oil-containing wastewater,
An oil and fat concentrating and separating apparatus that introduces the oil and fat-containing waste water and separates into a low-concentration fat and oil waste water and a high-concentration fat and oil waste water,
A methane fermentation apparatus that introduces the low-concentration fat wastewater and performs methane fermentation treatment of the low-concentration fat wastewater using microbial sludge;
An oil and fat decomposition apparatus that introduces the high-concentration fat drainage and decomposes fats and oils in the high-concentration fat drainage using microbial sludge,
The fat and oil decomposer includes a stirring device that stirs the high-concentration fat and oil wastewater introduced into the fat and oil decomposer, an oil and fat state acquisition unit that acquires a state of the fat and oil in the high-concentration fat and oil wastewater, and the fat and oil state acquisition. A biological wastewater treatment apparatus comprising: a control device that changes a stirring state of the stirring device in accordance with the state of the oil and fat obtained by the means. - 前記油脂状態取得手段は、前記高濃度油脂排水中の前記油脂の状態として、前記高濃度油脂排水の油脂濃度を取得することを特徴とする請求項１記載の生物学的排水処理装置。 2. The biological wastewater treatment apparatus according to claim 1, wherein the fat and oil state acquisition means acquires the fat and oil concentration of the high concentration fat and oil wastewater as the state of the fat and oil in the high concentration fat and oil wastewater.
- 前記油脂状態取得手段は、前記高濃度油脂排水中の前記油脂の状態として、前記高濃度油脂排水中の油脂粒子の大きさを取得することを特徴とする請求項１記載の生物学的排水処理装置。 2. The biological wastewater treatment according to claim 1, wherein the fat and oil state obtaining unit obtains the size of the fat and oil particles in the high concentration fat and oil wastewater as the state of the fat and oil in the high concentration fat and oil wastewater. apparatus.
- 前記油脂状態取得手段は、前記油脂分解装置内の前記高濃度油脂排水の一部を採取するサンプリング部と、前記サンプリング部により採取された前記高濃度油脂排水の画像を撮影する撮像部と、前記撮像部によって撮影された前記画像に画像処理を施し前記油脂粒子の大きさを取得する画像処理部と、を有することを特徴とする請求項３記載の生物学的排水処理装置。 The fat and oil state acquisition means includes a sampling unit that collects a part of the high-concentration fat drainage in the fat and oil decomposition apparatus, an imaging unit that captures an image of the high-concentration fat drainage collected by the sampling unit, and The biological wastewater treatment apparatus according to claim 3, further comprising: an image processing unit that performs image processing on the image captured by the imaging unit to acquire the size of the fat and oil particles.
- 前記油脂分解装置で用いられる前記微生物汚泥は、リパーゼを生成し且つ脂肪酸を分解する能力を有することを特徴とする請求項１～４のいずれか１項記載の生物学的排水処理装置。 The biological wastewater treatment apparatus according to any one of claims 1 to 4, wherein the microbial sludge used in the fat and oil decomposition apparatus has the ability to generate lipase and decompose fatty acids.
- 油脂含有排水中の有機物を分解する生物学的排水処理方法において、
前記油脂含有排水を油脂濃縮分離装置に導入し、低濃度油脂排水と高濃度油脂排水とに分離し、
前記低濃度油脂排水をメタン発酵装置に導入し、微生物汚泥を用いて前記低濃度油脂排水のメタン発酵処理を行い、
前記高濃度油脂排水を油脂分解装置に導入し、前記高濃度油脂排水と微生物汚泥とを攪拌装置により攪拌し、前記高濃度油脂排水中の前記油脂の状態を取得し、当該取得結果に応じて前記高濃度油脂排水の攪拌状態を変化させ、前記高濃度油脂排水中の油脂を分解することを特徴とする生物学的排水処理方法。 In a biological wastewater treatment method for decomposing organic matter in oil-containing wastewater,
The fat and oil containing wastewater is introduced into a fat and oil concentration separator, and separated into a low concentration fat wastewater and a high concentration fat wastewater,
The low-concentration fat wastewater is introduced into a methane fermentation apparatus, and the low-concentration fat wastewater is subjected to methane fermentation using microbial sludge,
The high-concentration fat / oil wastewater is introduced into a fat / oil decomposition apparatus, the high-concentration fat / oil wastewater and the microbial sludge are stirred by a stirrer, and the state of the fat / oil in the high-concentration fat / oil drainage is acquired. A biological wastewater treatment method, wherein the agitation state of the high-concentration fat drainage is changed to decompose the fats and oils in the high-concentration fat drainage.
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