JP3413856B2 - Method and apparatus for simultaneous treatment of digestive gas and odorous gas - Google Patents
Method and apparatus for simultaneous treatment of digestive gas and odorous gasInfo
- Publication number
- JP3413856B2 JP3413856B2 JP30562692A JP30562692A JP3413856B2 JP 3413856 B2 JP3413856 B2 JP 3413856B2 JP 30562692 A JP30562692 A JP 30562692A JP 30562692 A JP30562692 A JP 30562692A JP 3413856 B2 JP3413856 B2 JP 3413856B2
- Authority
- JP
- Japan
- Prior art keywords
- gas
- aerobic
- liquid
- anaerobic
- digestion
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
Classifications
-
- 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
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
- Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters
-
- 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
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W10/00—Technologies for wastewater treatment
- Y02W10/20—Sludge processing
Landscapes
- Treatment Of Sludge (AREA)
- Treating Waste Gases (AREA)
- Gas Separation By Absorption (AREA)
Description
【0001】[0001]
【産業上の利用分野】本発明は下水、し尿、産業排水、
汚泥、ゴミ等の有機性物質の嫌気性微生物消化により発
生する消化ガスから、硫化水素を除去するとともに、臭
気ガスを脱臭するための消化ガスと臭気ガスの同時処理
方法および装置に関する。The present invention relates to sewage, night soil, industrial wastewater,
The present invention relates to a method and an apparatus for simultaneously processing digestive gas and odorous gas for removing hydrogen sulfide from the digestive gas generated by anaerobic microbial digestion of organic substances such as sludge and dust and deodorizing odorous gas.
【0002】[0002]
【従来の技術】下水、し尿、産業排水等の排水、または
汚泥、ゴミ等の固形廃棄物などの有機性物質の処理法と
して、嫌気性微生物消化(以下、嫌気性消化という場合
がある)および好気性微生物酸化(以下、好気性酸化と
いう場合がある)が行われている。このうち嫌気性消化
には、有機性物質の固形物を含む全体を消化施設に導入
して長い滞留時間で嫌気性消化させる狭義の嫌気性消化
法と、有機性排棄物から固形分を除去し、溶解性有機物
を含む溶液を高負荷で汚泥と接触させて短い滞留時間で
処理を行うUASB法(上向流スラッジブランケット
法)、流動床法、固定床法などの高負荷嫌気性処理法と
が一般的である。BACKGROUND ART Anaerobic microbial digestion (hereinafter sometimes referred to as anaerobic digestion) and a method for treating organic substances such as wastewater such as sewage, night soil, industrial wastewater, or solid waste such as sludge and garbage, and Aerobic microbial oxidation (hereinafter sometimes referred to as aerobic oxidation) is performed. Among them, anaerobic digestion is a narrow sense of anaerobic digestion method that introduces the whole solid matter of organic substances into the digestion facility and anaerobically digests it with a long residence time, and removes solids from organic waste. However, high-load anaerobic treatment methods such as UASB method (upflow sludge blanket method), fluidized bed method, fixed bed method, etc. in which a solution containing soluble organic matter is brought into contact with sludge under high load and treated for a short residence time. And are common.
【0003】これらの嫌気性消化では、メタン発酵によ
り、消化ガス(バイオガス)が発生する。この消化ガス
中には、メタンのほかに、20〜40容積%の二酸化炭
素および0.05〜2容積%の硫化水素などのガスが含
まれている。このような消化ガスは、通常エネルギー回
収の目的で、ボイラーまたは焼却炉の燃料などとして有
効利用される場合が多いが、焼却装置の腐食防止および
大気汚染防止の観点から、燃焼に利用する前に硫化水素
の除去(脱硫)が行われる。消化ガス中の硫化水素濃度
はメタン発酵処理を受ける排水または廃棄物中の硫酸イ
オン濃度により変わる。In these anaerobic digestions, digestive gas (biogas) is generated by methane fermentation. In addition to methane, the digestive gas contains gases such as 20 to 40% by volume of carbon dioxide and 0.05 to 2% by volume of hydrogen sulfide. Such digestive gas is usually used effectively as fuel for boilers or incinerators for the purpose of recovering energy, but from the viewpoint of preventing corrosion of incinerators and preventing air pollution, before use for combustion. Hydrogen sulfide is removed (desulfurization). The concentration of hydrogen sulfide in digestive gas varies depending on the concentration of sulfate ion in wastewater or waste that undergoes methane fermentation treatment.
【0004】一方、嫌気性消化は、空気を供給せず、嫌
気的雰囲気で行われるため、施設全体から臭気が派生す
る。臭気の成分は、酸生成相で発生する有機酸臭、およ
びメタン生成相で発生する硫化水素臭が主なものであ
り、これが外部にもれると、臭気公害を引き起こす。こ
のため処理槽をカバーで覆って吸引し、臭気ガスが外部
にもれないようにするとともに、吸引した臭気ガスは、
薬品洗浄や活性炭処理等により脱臭している。On the other hand, anaerobic digestion is carried out in an anaerobic atmosphere without supplying air, so that odor is generated from the entire facility. The main components of the odor are an organic acid odor generated in the acid generation phase and a hydrogen sulfide odor generated in the methanation phase, and if this leaks to the outside, it causes odor pollution. Therefore, the treatment tank is covered with a cover and sucked to prevent the odorous gas from leaking to the outside.
Deodorized by chemical cleaning and activated carbon treatment.
【0005】従来、消化ガスの脱硫方法として、特公昭
62−38015号には、メタン生成相で発生する消化
ガス中に含まれる硫化水素を除去するために、生成消化
ガスを好気性処理における活性汚泥と接触させる方法が
開示されている。この方法は活性汚泥に硫化水素を吸収
させることにより、硫化水素を資化する細菌を活性汚泥
中で増殖させ、脱硫を行う方法である。しかしながら、
このような方法では臭気ガスの脱臭を行うことができ
ず、消化ガスと臭気ガスを同時に処理すると、消化ガス
中のメタンガス濃度が低下し、利用価値が下がる。As a conventional method for desulfurizing digestive gas, Japanese Patent Publication No. Sho 62-38015 discloses that the digestive gas produced is activated in aerobic treatment in order to remove hydrogen sulfide contained in the digestive gas generated in the methane production phase. A method of contacting with sludge is disclosed. This method is a method in which hydrogen sulfide is absorbed by activated sludge to grow hydrogen sulfide-utilizing bacteria in the activated sludge and desulfurize. However,
With such a method, the odorous gas cannot be deodorized, and if the digestive gas and the odorous gas are treated at the same time, the methane gas concentration in the digestive gas will decrease, and the utility value will decrease.
【0006】臭気ガスの脱臭方法としては、嫌気性消化
とは別に、あるいは嫌気性消化の後処理として設置され
た好気性処理装置に臭気ガスを導入して活性汚泥と接触
させ、脱臭する方法がある。しかし嫌気性処理装置の近
くに好気性処理装置がある場合には、臭気ガスを好気性
処理装置に導いて吹込むだけで脱臭できるが、嫌気性処
理水を下水に放流する場合のように、近くに好気性処理
装置がない場合には、別途臭気ガスの処理設備が必要と
なる。ところが好気性処理装置として、臭気処理専用の
活性汚泥処理装置を設置することは、曝気槽、沈殿槽、
汚泥返送ポンプ等が要ることから不経済である。As a method of deodorizing odorous gas, there is a method of introducing odorous gas into an aerobic treatment device installed separately from anaerobic digestion or as a post-treatment for anaerobic digestion and bringing the odorous gas into contact with activated sludge to deodorize. is there. However, if there is an aerobic treatment device near the anaerobic treatment device, it can be deodorized simply by introducing odorous gas into the aerobic treatment device and blowing it in, but as in the case of discharging anaerobic treated water to sewage, If there is no aerobic treatment equipment nearby, a separate odor gas treatment facility is required. However, installing an activated sludge treatment device for odor treatment as an aerobic treatment device is
It is uneconomical because it requires a sludge return pump.
【0007】[0007]
【発明が解決しようとする課題】本発明の目的は、上記
問題点を解決するため、メタンガスの含有率を低下させ
ず、低コストで効率よく、しかも高い脱硫率で消化ガス
を脱硫するとともに、臭気ガスを脱臭でき、かつ脱硫お
よび脱臭に伴って新たな廃液を生じない消化ガスおよび
臭気ガスの同時処理方法および装置を提案することであ
る。SUMMARY OF THE INVENTION An object of the present invention is to solve the above problems by desulfurizing a digested gas at a low cost efficiently without lowering the content of methane gas, and at a high desulfurization rate. An object of the present invention is to propose a method and apparatus for simultaneously treating digestive gas and odorous gas, which can deodorize odorous gas and do not generate new waste liquid with desulfurization and deodorization.
【0008】[0008]
【課題を解決するための手段】本発明は、次の消化ガス
および臭気ガスの同時処理方法および装置である。
(1)嫌気性消化施設において有機性物質の嫌気性微生
物消化を行い、嫌気性消化施設の消化液の1/1000
0〜1/10を好気性酸化装置に導入して好気性酸化を
行う方法であって、 嫌気性微生物消化により発生する消
化ガスを、pH7〜9に維持された前記好気性酸化装置
における混合液または処理液からなる洗浄液と接触させ
て、前記消化ガス中の硫化水素を前記洗浄液に吸収させ
る吸収工程と、前記吸収工程で得られた吸収液を前記好
気性酸化装置において好気性微生物酸化して、吸収され
た硫化水素を酸化する酸化工程と、前記有機性物質の嫌
気性消化により派生する臭気成分と空気の混合ガスから
なる臭気ガスを前記酸化工程に導入して脱臭および好気
性微生物酸化を行う工程とからなることを特徴とする消
化ガスと臭気ガスの同時処理方法。
(2)嫌気性消化施設がUASB反応器からなるメタン
生成槽を有する上記(1)記載の消化ガスと臭気ガスの
同時処理方法。 (3)有機性物質を嫌気性微生物消化し、消化ガスを発
生させる嫌気性消化施設と、 嫌気性消化施設の消化液の
1/10000〜1/10を導入し、好気性微生物酸化
して有機物を分解する好気性酸化装置と、 前記嫌気性消
化施設で発生する消化ガスを、pH7〜9に維持された
前記好気性酸化装置における混合液または処理液からな
る洗浄液と接触させて、前記消化ガス中の硫化水素を前
記洗浄液に吸収させる吸収装置と、 前記嫌気性消化施設
から前記吸収装置に消化ガスを供給する消化ガス供給路
と、 前記好気性酸化装置から前記吸収装置に混合液また
は処理液を供給する送液路と、 前記嫌気性消化施設で派
生する臭気成分と空気の混合ガスからなる臭気ガスを前
記好気性酸化装置に供給する臭気ガス供給路と、 前記吸
収装置から前記好気性酸化装置に吸収液を返送する返送
液路とを有することを特徴とする消化ガスと臭気ガスの
同時処理装置。 (4)嫌気性消化施設がUASB反応器からなるメタン
生成槽を有する上記(3)記載の消化ガスと臭気ガスの
同時処理装置。 The present invention is the following method and apparatus for simultaneously treating digestive gas and odorous gas. (1) Anaerobic microbial digestion of organic substances is performed in an anaerobic digestion facility to obtain 1/1000 of digestive juice in the anaerobic digestion facility.
0 to 1/10 is introduced into the aerobic oxidizer for aerobic oxidation.
In the method, the digestive gas generated by digestion of anaerobic microorganisms is brought into contact with a cleaning liquid composed of a mixed liquid or a treatment liquid in the aerobic oxidizer maintained at pH 7 to 9 to obtain the digestive gas. The absorption step of absorbing the hydrogen sulfide in the cleaning solution and the absorption solution obtained in the absorption step are preferable.
From the mixed gas of odorous components and air derived from the anaerobic digestion of the organic substance, the oxidation process of oxidizing aerobic microorganisms in the aerobic oxidation device to oxidize the absorbed hydrogen sulfide.
And a step of performing deodorization and aerobic microbial oxidation by introducing the odorous gas described above into the oxidation step. (2) Methane that anaerobic digestion facility consists of UASB reactor
Of the digestive gas and odorous gas according to (1) above, which has a production tank
Simultaneous processing method. (3) Digests anaerobic microorganisms from organic substances to generate digestive gas
Of the anaerobic digestion facility to produce and the digestive juices of the anaerobic digestion facility
Introduction of 1/10000 to 1/10, oxidation of aerobic microorganisms
Decomposing aerobic oxidation apparatus organics were, the anaerobic vanishing
Digestion gas generated in the gasification facility was maintained at pH 7-9
It consists of a mixed solution or a processing solution in the aerobic oxidizer.
Contact the cleaning solution to remove hydrogen sulfide in the digestion gas.
Absorption device for absorbing cleaning liquid, and the anaerobic digestion facility
Digestion gas supply path for supplying digestion gas from the above to the absorption device
A mixed solution from the aerobic oxidizer to the absorber or
Is used in the anaerobic digestion facility as well as the feed line for supplying the treatment liquid.
The odorous gas consisting of a mixed gas of live odorous components and air
The odorous gas supply path for supplying to the aerobic oxidizer and the intake
Return of absorbing liquid from the collecting device to the aerobic oxidation device
Of digestive gas and odorous gas characterized by having a liquid passage
Simultaneous processing equipment. (4) Anaerobic digestion facility methane consisting of UASB reactor
Of the digestive gas and odorous gas according to the above (3), which has a production tank
Simultaneous processing equipment.
【0009】本発明において嫌気性消化とは、被処理物
である有機性物質を嫌気状態に保つことにより、嫌気性
微生物の作用を利用して有機物を分解する操作であり、
有機性物質の全体を投入して消化させる狭義の嫌気性消
化と、固形物を除去して溶解性有機物のみを嫌気性処理
するUASB法、流動床法、固定床法などの高負荷嫌気
性処理とが一般的であるが、このほかに有機性物質を単
に施設に堆積して消化させる処理、その他の嫌気性消化
が含まれる。これらの嫌気性消化は、充填層型、流動層
型、スラッジブランケット型など、任意の嫌気性消化装
置により処理することができる。In the present invention, anaerobic digestion is an operation of decomposing organic substances by utilizing the action of anaerobic microorganisms by keeping an organic substance which is an object to be treated in an anaerobic state,
Anaerobic digestion in the narrow sense of inputting and digesting the whole organic substance, and high load anaerobic treatment such as UASB method of removing solid matter and anaerobic treatment of only soluble organic matter, fluidized bed method, fixed bed method, etc. In addition to the above, other processes include anaerobic digestion and other processes in which organic substances are simply deposited in a facility and digested. These anaerobic digestions can be processed by any anaerobic digester such as a packed bed type, a fluidized bed type, and a sludge blanket type.
【0010】本発明において脱硫の対象となる消化ガス
は、例えば下水、し尿、産業排水等の排水および汚泥、
ゴミ等の固形廃棄物などの有機性物質を嫌気性消化する
際、メタン生成槽等においてメタン発酵により発生する
消化ガスである。このような消化ガス中には、通常メタ
ンガスのほかに、二酸化炭素および硫化水素などのガス
が含まれている。上記の消化ガスは嫌気性消化装置にお
ける嫌気性消化により発生するのが一般的であるが、ゴ
ミ埋立地など、嫌気性消化装置以外の嫌気性消化施設に
おける嫌気性消化により発生する場合もある。The digestive gas to be desulfurized in the present invention is, for example, sewage, night soil, wastewater such as industrial wastewater and sludge,
It is a digestion gas generated by methane fermentation in a methane production tank when anaerobicly digesting organic substances such as solid waste such as garbage. Such digestive gas usually contains gases such as carbon dioxide and hydrogen sulfide in addition to methane gas. The above-mentioned digestive gas is generally generated by anaerobic digestion in an anaerobic digester, but it may also be generated by anaerobic digestion in an anaerobic digester other than the anaerobic digester such as a garbage landfill.
【0011】本発明において脱臭の対象となる臭気ガス
は、嫌気性消化に伴って嫌気性消化施設から派生する臭
気を帯びたガスである。このような臭気ガスは被処理物
貯槽、酸生成槽、メタン生成槽、処理水槽、汚泥貯槽な
どから発生する臭気を除去するために、これらの施設を
カバーで覆い、ブロワなどにより吸引して得られる臭気
成分と空気の混合ガスである。臭気成分は硫化水素、メ
チルメルカプタン、有機酸およびそのエステルなどが主
成分として含まれる。The odorous gas to be deodorized in the present invention is an odorous gas derived from an anaerobic digestion facility with anaerobic digestion. Such odorous gas can be obtained by covering these facilities with a cover and sucking them with a blower in order to remove the odors generated from the storage tank for treated substances, acid generation tank, methane generation tank, treated water tank, sludge storage tank, etc. It is a mixed gas of odorous components and air. The odorous components include hydrogen sulfide, methyl mercaptan, organic acids and their esters as main components.
【0012】[0012]
【作用】以下、本発明の処理方法を本発明の処理装置の
作用とともに説明する。まず本発明の処理装置において
は、嫌気性消化施設において、有機性物質の嫌気性消化
を行い、有機物を分解する。そして消化により発生する
消化ガスを消化ガス供給路から吸収装置に供給して脱硫
を行い、また臭気ガスを好気性酸化装置に供給して、脱
臭を行うとともに、好気性酸化を行う。The processing method of the present invention will be described below together with the operation of the processing apparatus of the present invention. First, in the treatment apparatus of the present invention, an anaerobic digestion facility performs anaerobic digestion of organic substances to decompose organic substances. Then, the digestive gas generated by digestion is supplied from the digestive gas supply path to the absorber for desulfurization, and the odorous gas is supplied to the aerobic oxidizer for deodorization and aerobic oxidation.
【0013】吸収装置における吸収工程では、消化ガス
を洗浄液と接触させて、消化ガス中の硫化水素を洗浄液
に吸収させる。洗浄液としては、pH7〜9に維持され
た好気性酸化装置における混合液または処理液が使用さ
れる。好気性酸化を行う有機性物質は、嫌気性消化の消
化液(処理液)である。 In the absorption step in the absorption device, the digestive gas is brought into contact with the cleaning liquid to absorb hydrogen sulfide in the digestive gas into the cleaning liquid. As a cleaning solution , maintain a pH of 7-9
Mixture or processing liquid is used in aerobic oxidation apparatus. Organic substances of performing aerobic oxidation, digestive fluids (treatment liquid) of anaerobic digestion Ru der.
【0014】この場合、嫌気性消化施設の消化液を好気
性酸化装置に導入して好気性酸化を行い、その混合液ま
たは処理液を洗浄液として吸収装置に送液し、前記嫌気
性消化施設から供給される消化ガスと接触させる。特に
嫌気性消化液をそのまま下水道等に放流する系において
は、本発明の脱硫を行うために、嫌気性消化液の一部を
好気性酸化する。この場合、好気性酸化を行う嫌気性消
化液の量は、脱硫の酸化工程に必要な範囲でよく、消化
液の1/10000〜1/10である。In this case, the digestive liquid of the anaerobic digestion facility is introduced into the aerobic oxidation device to perform aerobic oxidation, and the mixed solution or treatment liquid is sent to the absorption device as a cleaning liquid, and then from the anaerobic digestion facility. Ru is contacted with the biogas supplied. In the system for particular discharge the <br/> anaerobic digestion solution as it sewers, etc., in order to perform the desulfurization of the present invention, you aerobic oxidizing part of the anaerobic digestion solution. In this case, the amount of anaerobic digestion solution to perform aerobic oxidation is rather good to the extent required for the oxidation process of desulfurization, digestion
It is 1/10000 to 1/10 of the liquid .
【0015】好気性酸化装置における好気性酸化は、被
処理物である嫌気性消化施設の消化液を好気状態に保っ
て、好気性微生物の作用を利用して有機物を酸化分解す
る処理であり、活性汚泥法、散布濾床法、浸漬型の固定
床法、流動床法、回転円板法など、任意の好気性酸化装
置を用いた処理法により処理を行うことができる。本発
明では、臭気ガスを好気性酸化装置に供給して好気性微
生物および有機物と接触させることにより、臭気成分を
酸化して脱臭するとともに、臭気ガス中の酸素の作用に
より有機物の好気性酸化を行う。ここでは臭気ガスとと
もに空気を供給してもよい。The aerobic oxidation in the aerobic oxidizer is a treatment for keeping the digestive juice of the anaerobic digestion facility, which is the object to be treated, in an aerobic state and oxidatively decomposing the organic matter by utilizing the action of aerobic microorganisms. The treatment can be carried out by any treatment method using an aerobic oxidizer such as an activated sludge method, a spray filter method, an immersion type fixed bed method, a fluidized bed method and a rotating disk method. In the present invention, the odorous gas is supplied to the aerobic oxidizer and brought into contact with the aerobic microorganisms and the organic matter to oxidize and deodorize the odorous component, and the aerobic oxidation of the organic matter by the action of oxygen in the odorous gas. To do. Here, air may be supplied together with the odorous gas.
【0016】洗浄液として用いる好気性酸化における混
合液は、好気性酸化を行っている途中の被処理液が、好
気性微生物を含む汚泥(活性汚泥)と混合した状態の混
合液であり、処理液は好気性酸化を終って汚泥を分離し
た処理液である。The mixed liquid in the aerobic oxidation used as the cleaning liquid is a mixed liquid in which the liquid to be treated during the aerobic oxidation is mixed with sludge containing aerobic microorganisms (activated sludge). Is a treatment liquid obtained by separating sludge after aerobic oxidation.
【0017】洗浄液としては、混合液を用いる方が硫化
水素の吸収効率は高く、脱硫率が高くなる。これは汚泥
による吸着、または好気性微生物による摂取によるもの
と推測されるが、明らかではない。もっとも気液接触効
率の高い吸収装置を用いれば、処理液による吸収効率も
高くなり、脱硫率も高くなる。As the cleaning liquid, the use of a mixed liquid has a higher hydrogen sulfide absorption efficiency and a higher desulfurization rate. It is speculated that this is due to adsorption by sludge or ingestion by aerobic microorganisms, but it is not clear. If the absorption device having the highest gas-liquid contact efficiency is used, the absorption efficiency of the treatment liquid will be high and the desulfurization rate will be high.
【0018】吸収工程に用いる吸収装置としては、消化
ガスと洗浄液を効率よく気液接触させるものであればよ
く、曝気槽、充填塔、スプレー塔、スクラバーなど、任
意の形式のものが使用可能である。吸収装置への消化ガ
スの通ガス条件は、通常空間速度(SV)が5〜50h
r-1、好ましくは10〜20hr-1、洗浄液の通液条件
は、通常滞留時間(HRT)が2〜60分間、好ましく
は5〜20分間が望ましい。As the absorption device used in the absorption step, any device can be used as long as it efficiently makes the digestion gas and the cleaning liquid come into gas-liquid contact, and any type such as an aeration tank, a packed tower, a spray tower, a scrubber, etc. can be used. is there. The conditions for passing digestion gas through the absorber are usually space velocity (SV) of 5 to 50 h.
r −1 , preferably 10 to 20 hr −1 , and the washing liquid passing conditions are usually such that the residence time (HRT) is 2 to 60 minutes, preferably 5 to 20 minutes.
【0019】吸収装置において気液接触することによ
り、消化ガス中の硫化水素は洗浄液に吸収され、吸収液
が得られる。このとき消化ガス中の二酸化炭素その他の
不純物も洗浄液に吸収され、メタン濃度の高い処理ガス
が得られる。混合液を洗浄液とする場合は、硫化水素が
混合液に吸収されたとき、汚泥による吸着、または微生
物による摂取が生じるものと思われる。洗浄液のpHが
高いほど硫化水素の吸収効率が高く、本発明ではpH7
〜9に維持する。 By making gas-liquid contact in the absorption device, hydrogen sulfide in the digestion gas is absorbed by the cleaning liquid to obtain an absorption liquid. At this time, carbon dioxide and other impurities in the digestion gas are also absorbed by the cleaning liquid, and a processing gas having a high methane concentration is obtained. When the mixed solution is used as a cleaning solution, when hydrogen sulfide is absorbed by the mixed solution, it is considered that adsorption by sludge or ingestion by microorganisms occurs. Absorption efficiency of the hydrogen sulphide as the pH of the cleaning solution is high rather high, in the present invention pH7
Keep ~ 9 .
【0020】好気性酸化装置の混合液または処理液は臭
気ガスのエアレーションにより有機物が分解されるとと
もに、二酸化炭素がストリッピングされるため、嫌気性
消化液に比べてアルカリ度およびpHがともに高くなっ
ており、pHは通常7〜9である。このため混合液また
は処理液はpH調整することなく、そのまま洗浄液とし
て使用することができるが、pHが低い場合にはアルカ
リを添加して上記pHに調整する。Since the organic matter is decomposed by the aeration of the odorous gas and the carbon dioxide is stripped in the mixed solution or treatment solution of the aerobic oxidizer, both the alkalinity and the pH are higher than those of the anaerobic digestion solution. The pH is usually 7-9. Therefore, the mixed solution or the treatment solution can be used as it is as a cleaning solution without adjusting the pH, but when the pH is low, an alkali is added to adjust the pH to the above .
【0021】吸収工程において硫化水素を吸収した吸収
液は、酸化工程において好気性酸化装置に返送して好気
性酸化を行い、好気性微生物の作用により硫化水素を酸
化する。このとき吸収工程で吸収された他の不純物も処
理される。例えば二酸化炭素はストリッピングされ、有
機物は分解される。The absorption liquid which has absorbed hydrogen sulfide in the absorption step is returned to the aerobic oxidation device in the oxidation step to undergo aerobic oxidation, and hydrogen sulfide is oxidized by the action of aerobic microorganisms. At this time, other impurities absorbed in the absorption step are also treated. For example, carbon dioxide is stripped and organic matter is decomposed.
【0022】好気性酸化装置における好気性微生物は、
臭気成分および有機物を好気的に分解する細菌が主体と
なっているが、汚泥中にはチオバチルス属、チオトリッ
クス属およびベギアトア属などのイオウ酸化細菌が含ま
れているため、その酸化作用により硫化水素は硫酸イオ
ンまたは単体イオウに酸化され無害化する。Aerobic microorganisms in the aerobic oxidizer are:
Bacteria that aerobically decompose odorous components and organic matter are the main constituents, but since sludge contains sulfur-oxidizing bacteria such as Thiobacillus, Thiotrix and Begiatoa, it is sulphated by its oxidizing action. Hydrogen is made harmless by being oxidized to sulfate ions or elemental sulfur.
【0023】硫化水素の酸化により、硫酸イオンが生成
するため、混合液または処理液のpHが低下する。通常
はpH調整することなく、混合液または処理液をそのま
ま吸収工程に送って硫化水素の吸収を行うことができる
が、硫化水素の量が多い場合は生成する硫酸イオンの量
も多いので、pHが7より小さくなる場合は、水酸化ナ
トリウム等のアルカリを添加してpHを7〜9に維持す
る。この場合でも、アルカリの使用量は、薬品洗浄法に
比べると少ない。Oxidation of hydrogen sulfide produces sulfate ions, which lowers the pH of the mixed solution or treatment solution. Usually, without adjusting the pH, it is possible to send the mixed solution or the treatment solution as it is to the absorption step to absorb hydrogen sulfide, but if the amount of hydrogen sulfide is large, the amount of sulfate ions produced is also large, so If is less than 7, keep the pH at 7-9 by adding alkali such as sodium hydroxide.
It Even in this case, the amount of alkali used is smaller than that in the chemical cleaning method.
【0024】好気性酸化により臭気成分および有機物を
分解するとともに、硫化水素を酸化した混合液は、固液
分離により固形物を除去し、分離液を処理液として放流
する。分離した汚泥は必要量を好気性酸化装置に返送
し、余剰汚泥は系外に排出する。この間混合液または処
理液の一部は洗浄液として吸収装置に送液される。以上
により消化ガスおよび臭気ガスは同時に処理される。The mixed liquid obtained by decomposing odorous components and organic substances by aerobic oxidation and oxidizing hydrogen sulfide is subjected to solid-liquid separation to remove solids, and the separated liquid is discharged as a treatment liquid. The necessary amount of separated sludge is returned to the aerobic oxidizer, and excess sludge is discharged to the outside of the system. During this time, a part of the mixed liquid or the processing liquid is sent to the absorption device as a cleaning liquid. As a result, the digestive gas and the odorous gas are processed at the same time.
【0025】[0025]
【実施例】以下、本発明を実施例により説明する。図1
は実施例による消化ガスおよび臭気ガスの同時処理装置
を示す系統図、図2はその吸収装置と好気性酸化装置の
構成図である。図において、1は嫌気性消化装置で、被
処理物貯槽2、酸生成槽3、メタン生成槽4および処理
液槽5からなる。6は好気性酸化装置、7は吸収装置で
ある。EXAMPLES The present invention will be described below with reference to examples. Figure 1
Is a system diagram showing a simultaneous digestion gas and odorous gas treatment apparatus according to the embodiment, and FIG. 2 is a configuration diagram of the absorption apparatus and aerobic oxidation apparatus. In the figure, reference numeral 1 denotes an anaerobic digester, which comprises an object storage tank 2, an acid production tank 3, a methane production tank 4 and a treatment liquid tank 5. 6 is an aerobic oxidizer, and 7 is an absorber.
【0026】嫌気性消化装置1には被処理物導入路8お
よび処理液流路9が接続している。被処理物貯槽2、酸
生成槽3、メタン生成槽4、処理液槽5はそれぞれ密閉
槽からなり、流路11、12、13によってシリーズに
連絡している。被処理物貯槽2、酸生成槽3、処理液槽
5はカバーで覆われて、臭気ガス供給路14に連絡し、
ブロワ15を介して好気性酸化装置6に接続している。
メタン生成槽4はUASB、流動床、固定床、嫌気性コ
ンタクト法など任意の嫌気性処理法が採用され、その頂
部から消化ガス供給路16がブロワ17を介して吸収装
置7の下部に連絡している。The anaerobic digestion apparatus 1 is connected with a material introduction passage 8 and a treatment liquid passage 9. The object storage tank 2, the acid production tank 3, the methane production tank 4, and the treatment liquid tank 5 each are a closed tank, and are connected to the series by flow paths 11, 12, and 13. The object storage tank 2, the acid production tank 3, and the processing liquid tank 5 are covered with a cover and communicate with the odorous gas supply passage 14.
It is connected to the aerobic oxidizer 6 via a blower 15.
The methane production tank 4 employs any anaerobic treatment method such as UASB, fluidized bed, fixed bed, and anaerobic contact method, and the digestion gas supply passage 16 connects the lower portion of the absorber 7 via the blower 17 from the top thereof. ing.
【0027】好気性酸化装置6は、好気性酸化部6aと
固液分離部6bとからなる。好気性酸化部6aの上部に
は、嫌気性消化液移送路18および返送液路19が連絡
し、下部には散気管6cが設けられ、これに臭気ガス供
給路14が連絡している。固液分離部6bからは送液路
20がポンプ21を介して吸収装置7に連絡するととも
に、処理液排出路22が処理液流路9に連絡している。The aerobic oxidizer 6 comprises an aerobic oxidizer 6a and a solid-liquid separator 6b. An anaerobic digestive liquid transfer passage 18 and a return liquid passage 19 are connected to the upper part of the aerobic oxidation part 6a, and an air diffuser 6c is provided to the lower part thereof, and the odorous gas supply passage 14 is connected to this. From the solid-liquid separation section 6b, the liquid feed passage 20 communicates with the absorption device 7 via the pump 21, and the treatment liquid discharge passage 22 communicates with the treatment liquid passage 9.
【0028】吸収装置7は内部に洗浄液23を貯留して
いる。吸収装置7の下部には消化ガス供給路16および
送液路20が連絡し、上部にはガス排出路24および返
送液路19が連絡している。The absorption device 7 stores the cleaning liquid 23 therein. The digestion gas supply passage 16 and the liquid feed passage 20 are connected to the lower portion of the absorber 7, and the gas discharge passage 24 and the return liquid passage 19 are connected to the upper portion.
【0029】上記の処理装置による処理方法は次の通り
である。まず嫌気性消化装置1の被処理物貯槽2に被処
理物導入路8から、下水、し尿、排水等の有機性物質か
らなる被処理物を導入して貯留し、一部を流路11から
酸生成槽3に移送して嫌気性に保つと、有機酸発酵によ
り有機酸が生成する。有機酸発酵液は流路12からメタ
ン生成槽4に導入して嫌気処理すると、嫌気性微生物の
作用によりメタン発酵が行われ、メタンが生成する。こ
の嫌気性消化により発生する消化ガスを消化ガス供給路
16からブロワ17により吸収装置7に供給する。嫌気
性消化液は流路13から処理液槽5に取出した後、一部
を嫌気性消化液移送路18から好気性酸化装置6に移送
する。そして被処理物貯槽2、酸生成槽3、処理液槽5
で発生する臭気ガスを臭気ガス供給路14に集め、ブロ
ワ15により好気性酸化装置6の散気管6cに供給す
る。The processing method by the above processing apparatus is as follows. First, the treated substance storage tank 2 of the anaerobic digester 1 is introduced from the treated substance introducing passage 8 and the treated substance made of an organic substance such as sewage, human waste, drainage, etc. When transferred to the acid production tank 3 and kept anaerobic, an organic acid is produced by organic acid fermentation. When the organic acid fermentation liquid is introduced into the methane production tank 4 from the flow path 12 and anaerobically treated, methane fermentation is performed by the action of anaerobic microorganisms, and methane is produced. The digestion gas generated by this anaerobic digestion is supplied from the digestion gas supply passage 16 to the absorber 7 by the blower 17. The anaerobic digestive liquid is taken out from the flow path 13 to the treatment liquid tank 5, and then part of it is transferred to the aerobic oxidation device 6 from the anaerobic digestive liquid transfer path 18. Then, the object storage tank 2, the acid production tank 3, the processing liquid tank 5
The odorous gas generated in 1 is collected in the odorous gas supply passage 14 and supplied to the diffuser pipe 6c of the aerobic oxidizer 6 by the blower 15.
【0030】好気性酸化装置6では、嫌気性消化液移送
路18から流入する被処理液を好気性酸化部6aにおい
て活性汚泥と混合し、臭気ガス供給路14から供給され
る臭気ガスを散気管6cから散気し、好気性酸化を行
う。この好気性酸化において、活性汚泥に含まれる好気
性微生物の作用により、被処理液中の有機物とともに、
臭気ガス中の臭気成分が分解され脱臭が行われる。そし
て好気性酸化部6a内の混合液の一部は固液分離部6b
に入って固液分離され、分離液の一部は送液路20から
ポンプ21によって吸収装置7に送られ、残部は処理液
として処理液排出路22から排出される。分離した活性
汚泥の一部は好気性酸化部6aに返送され、余剰汚泥は
系外へ排出される。In the aerobic oxidizer 6, the liquid to be treated flowing in from the anaerobic digestion liquid transfer passage 18 is mixed with activated sludge in the aerobic oxidizer 6a, and the odorous gas supplied from the odorous gas supply passage 14 is diffused into the aeration pipe. Aerate from 6c and perform aerobic oxidation. In this aerobic oxidation, by the action of aerobic microorganisms contained in activated sludge, along with the organic matter in the liquid to be treated,
The odorous components in the odorous gas are decomposed and deodorized. A part of the mixed liquid in the aerobic oxidation section 6a is part of the solid-liquid separation section 6b.
The liquid enters and is subjected to solid-liquid separation, a part of the separated liquid is sent from the liquid sending passage 20 to the absorbing device 7 by the pump 21, and the rest is discharged as a processing liquid from the processing liquid discharge passage 22. Part of the separated activated sludge is returned to the aerobic oxidation section 6a, and the excess sludge is discharged to the outside of the system.
【0031】消化ガスの脱硫は、まず吸収工程におい
て、好気性酸化装置6の固液分離部6bから処理液の一
部を、ポンプ21により送液路20を通して、吸収装置
7の下部に送液する。そして消化ガス供給路16から供
給される消化ガスを上向流で洗浄液23を通過させて気
液接触を行い、消化ガス中の硫化水素、二酸化炭素、そ
の他の水溶性成分を洗浄液23に吸収させる。吸収装置
7への消化ガスの供給条件はSVとして5〜50h
r-1、好ましくは10〜20hr-1、洗浄液23の通液
条件はHRTとして2〜60分、好ましくは5〜20分
間が適当である。In the desulfurization of digestive gas, first, in the absorption step, a part of the treatment liquid is sent from the solid-liquid separation section 6b of the aerobic oxidation device 6 to the lower part of the absorption device 7 through the liquid supply passage 20 by the pump 21. To do. Then, the digestion gas supplied from the digestion gas supply passage 16 is passed through the cleaning liquid 23 in an upward flow to make gas-liquid contact with the cleaning liquid 23 to absorb hydrogen sulfide, carbon dioxide, and other water-soluble components in the digestion gas. . The condition for supplying digestion gas to the absorber 7 is 5 to 50 hours as SV.
r -1 , preferably 10 to 20 hr -1, and the washing liquid 23 is passed under conditions of HRT of 2 to 60 minutes, preferably 5 to 20 minutes.
【0032】洗浄液23は、二酸化炭素が除去されてp
Hが7〜9となっているため、硫化水素、二酸化炭素等
の吸収効率はよい。気液接触により硫化水素、二酸化炭
素等を除去した消化ガスは、メタン濃度の高い処理ガス
として、ガス排出路24から排出される。また硫化水
素、二酸化炭素等を吸収した洗浄液23は吸収液として
返送液路19から好気性酸化装置6に返送される。Carbon dioxide is removed from the cleaning liquid 23, and p
Since H is 7 to 9, the absorption efficiency of hydrogen sulfide, carbon dioxide, etc. is good. The digested gas from which hydrogen sulfide, carbon dioxide, etc. have been removed by gas-liquid contact is discharged from the gas discharge passage 24 as a process gas having a high methane concentration. Further, the cleaning liquid 23 that has absorbed hydrogen sulfide, carbon dioxide, etc. is returned to the aerobic oxidation device 6 from the returning liquid passage 19 as an absorbing liquid.
【0033】好気性酸化装置6から吸収装置7に送る洗
浄液としては、汚泥の混合液を送った方が、汚泥を分離
した後の処理液を送るよりも吸着効率は高くなるが、菌
体が毒性のある硫化水素に暴露されて、好気性酸化装置
6での菌体活性が低下し、過負荷状態となって発泡が著
しくなることもあるので、むしろ安定運転のためには汚
泥を分離した処理液を吸収装置7との間で循環した方が
よい。As the cleaning liquid to be sent from the aerobic oxidation device 6 to the absorption device 7, the mixed solution of sludge is more efficient than the processed solution after separating the sludge, but the bacterial cells are When exposed to toxic hydrogen sulfide, the bacterial activity in the aerobic oxidizer 6 may be reduced, and overload may result in significant foaming. Therefore, sludge was separated for stable operation. It is better to circulate the treatment liquid with the absorption device 7.
【0034】好気性酸化装置6に返送された吸収液は、
酸化工程として、好気性酸化部6aにおいて活性汚泥と
混合され、好気性酸化を受ける。そして好気性微生物の
作用により、吸収液中の硫化水素その他の被酸化性物質
は微生物酸化され、無害化する。二酸化炭素は散気によ
りストリッピングされ、除去される。硫化水素の酸化に
より硫酸イオンが生成し、pHが下がりすぎるときは、
好気性酸化部6aにアルカリを注入し、pHを調整す
る。The absorption liquid returned to the aerobic oxidation device 6 is
As an oxidation step, the aerobic oxidation section 6a mixes with activated sludge and undergoes aerobic oxidation. Then, due to the action of aerobic microorganisms, hydrogen sulfide and other oxidizable substances in the absorbing solution are microbially oxidized and rendered harmless. Carbon dioxide is stripped and removed by aeration. When sulfate ions are generated by the oxidation of hydrogen sulfide and the pH drops too much,
An alkali is injected into the aerobic oxidation section 6a to adjust the pH.
【0035】上記の脱硫のための酸化工程は、被処理液
中の有機物除去および臭気ガスの脱臭のための好気性酸
化と同時に行われ、無害化した処理液は処理液排出路2
2から、他の嫌気性処理液とともに下水に放流すること
ができる。好気性酸化装置6に供給する被処理液の量
は、被処理液中に残留する有機物および嫌気性細菌を基
質として従属栄養細菌が生育できる条件とするため、嫌
気性処理液の1/10000〜1/10とする。The above-mentioned oxidation step for desulfurization is carried out at the same time as the aerobic oxidation for removing organic matters in the liquid to be treated and deodorizing the odorous gas, and the treated liquid which has been rendered harmless is treated liquid discharge path 2
From 2, it can be discharged into sewage together with other anaerobic treatment liquids. The amount of the processing liquid supplied to the aerobic oxidation apparatus 6 to a condition which can grow heterotrophic bacteria organic matter and anaerobic bacteria remaining in the liquid to be treated as a substrate, the disgusting <br/> temper treatment liquid and 1 / 10,000 to 1/10.
【0036】なお、上記実施例では、嫌気性消化装置1
の嫌気性消化液の一部を、好気性酸化装置6において好
気性酸化し、嫌気性消化液の大部分をそのまま下水等に
放流する場合を示している。また酸生成槽3を省略し
て、被処理物貯槽2またはメタン生成槽4で酸発酵を行
うことができる。処理液槽5も省略可能である。In the above embodiment, the anaerobic digester 1
Some of the anaerobic digestion solution, and aerobic oxidation in an aerobic oxidation apparatus 6, that shows the case where discharge most of the anaerobic digestion solution as sewage or the like. Further , the acid fermentation tank 3 can be omitted and the acid fermentation can be carried out in the object storage tank 2 or the methane production tank 4. The treatment liquid tank 5 can also be omitted.
【0037】またゴミ処分地、堆肥化施設等から発生す
る消化ガスを脱硫することもでき、これらの場合は、浸
出水の好気性酸化の混合液または処理液を洗浄液23と
して利用することができる。Further it is also possible to desulfurize the digestion gas generated waste disposal site, a composting facilities, these cases, the mixture or the processing liquid aerobic oxidation of leachate can be used as the washing liquid 23 .
【0038】以下、試験例について説明する。
試験例1
図1および図2の処理装置において、ビール工場の仕込
排水を被処理物とし、メタン生成槽4として1.4m3
のUASB反応器を採用して嫌気処理を行った。また好
気性酸化装置6としては、容量212 literの曝気槽で
汚泥の沈殿分離機構付きの槽を利用し、被処理物貯槽
2、酸生成槽3、処理液槽5の空間部から吸引した臭気
ガスを0.06Nm3/minで通気した。また嫌気性
処理液を好気性酸化装置6にHRT4〜5日の条件で供
給した。一方、好気性酸化装置6の汚泥分離後の流出液
は吸収装置7に2 liter/minで供給し、吸収後の液
を再び好気性酸化装置6に循環した。吸収装置7は容量
22 liter、高さ2.8mのカラムで、下部より消化ガ
スを21日目まではガス供給量2.5 liter/min
(SV=6.8hr-1)で、またそれ以降は4.5 lit
er/min(SV=12.2hr-1)にて供給、合計約
2カ月間連続運転した。処理結果を平均値で表1に示
す。Test examples will be described below. Test Example 1 In the treatment apparatus of FIG. 1 and FIG. 2, 1.4 m 3 was used as the methane production tank 4 by using the waste water of the beer factory as the material to be treated.
Anaerobic treatment was carried out by adopting the UASB reactor of. As the aerobic oxidizer 6, an aeration tank with a capacity of 212 liters and a tank with a sludge precipitation separation mechanism is used, and the odor sucked from the space of the object storage tank 2, the acid generation tank 3, and the processing liquid tank 5 is used. Gas was bubbled at 0.06 Nm 3 / min. Further, the anaerobic treatment liquid was supplied to the aerobic oxidation device 6 under the conditions of HRT for 4 to 5 days. On the other hand, the effluent after sludge separation of the aerobic oxidizer 6 was supplied to the absorber 7 at 2 liter / min, and the absorbed liquid was circulated to the aerobic oxidizer 6 again. The absorption device 7 is a column with a capacity of 22 liters and a height of 2.8 m. The digestion gas is supplied from the bottom up to the 21st day at a gas supply rate of 2.5 liter / min.
(SV = 6.8 hr −1 ) and after that 4.5 lit
er / min (SV = 12.2 hr −1 ) and continuously operated for a total of about 2 months. The treatment results are shown in Table 1 as an average value.
【0039】[0039]
【表1】
表1に示すように、硫化水素除去率は90%以上、好気
性酸化装置入口、出口間の臭気濃度除去率は95%以上
で、この処理機能が約2カ月間継続した。[Table 1] As shown in Table 1, the hydrogen sulfide removal rate was 90% or more, the odor concentration removal rate between the inlet and outlet of the aerobic oxidizer was 95% or more, and this treatment function continued for about 2 months.
【0040】[0040]
【発明の効果】本発明によれば、嫌気性消化施設におい
て有機性物質の嫌気性微生物消化を行い、嫌気性消化施
設の消化液の1/10000〜1/10を好気性酸化装
置に導入して好気性酸化を行う方法において、嫌気性微
生物消化の消化ガスを、pH7〜9に維持された好気性
酸化の混合液または処理液からなる洗浄液と接触させて
硫化水素を吸収させ、これを好気性酸化装置により酸化
するとともに、臭気ガスを好気性酸化装置に供給して脱
臭するようにしたので、消化ガスを低コスト、かつ高脱
硫率で脱硫でき、これによりメタン含有率の高い処理ガ
スを得るとともに、臭気ガスの脱臭を同時に行い、硫化
水素を無害化して処理液とともに放流することができ
る。INDUSTRIAL APPLICABILITY According to the present invention, it is possible to remove odor in an anaerobic digestion facility
Anaerobic microbial digestion of organic substances by anaerobic digestion
Aerobically oxidize 1/1000 to 1/10 of digestive juice
Anaerobic microbes in a method of introducing aerobic oxidation into a cell.
The digestive gas of biological digestion is brought into contact with a cleaning liquid consisting of an aerobic oxidation mixture or treatment liquid maintained at pH 7 to 9 to absorb hydrogen sulfide, which is oxidized by an aerobic oxidation device and odorous gas is emitted. Since it is supplied to the aerobic oxidizer for deodorization, it is possible to desulfurize digestion gas at a low cost and with a high desulfurization rate, thereby obtaining a process gas with a high methane content rate and simultaneously deodorizing odorous gas, Hydrogen sulfide can be rendered harmless and discharged together with the treatment liquid.
【図1】実施例の消化ガスおよび臭気ガスの同時処理装
置を示す系統図である。FIG. 1 is a system diagram showing a simultaneous digestion gas and odorous gas processing apparatus of an embodiment.
【図2】実施例の吸収装置と好気性酸化装置を示す構成
図である。FIG. 2 is a configuration diagram showing an absorber and an aerobic oxidizer of an embodiment.
【符号の説明】 1 嫌気性消化装置 2 被処理物貯槽 3 酸生成槽 4 メタン生成槽 5 処理液槽 6 好気性酸化装置 6a 好気性酸化部 6b 固液分離部 6c 散気管 7 吸収装置 8 被処理物導入路 9 処理液流路 14 臭気ガス供給路 15、17 ブロワ 16 消化ガス供給路 18 嫌気性消化液移送路 19 返送液路 20 送液路 21 ポンプ 22 処理液排出路 23 洗浄液 24 ガス排出路[Explanation of symbols] 1 Anaerobic digester 2 Processing object storage tank 3 Acid production tank 4 Methane production tank 5 processing liquid tank 6 Aerobic oxidizer 6a Aerobic oxidation part 6b Solid-liquid separation section 6c Air diffuser 7 Absorber 8 Processing object introduction path 9 Processing liquid flow path 14 Odor gas supply path 15,17 Blower 16 Digestion gas supply channel 18 Anaerobic digestive fluid transfer path 19 Return liquid path 20 Liquid transfer path 21 pumps 22 Processing liquid discharge path 23 Cleaning solution 24 gas discharge channel
Claims (4)
気性微生物消化を行い、嫌気性消化施設の消化液の1/
10000〜1/10を好気性酸化装置に導入して好気
性酸化を行う方法であって、 嫌気性微生物消化 により発生する消化ガスを、pH7〜
9に維持された前記好気性酸化装置における混合液また
は処理液からなる洗浄液と接触させて、前記消化ガス中
の硫化水素を前記洗浄液に吸収させる吸収工程と、 前記吸収工程で得られた吸収液を前記好気性酸化装置に
おいて好気性微生物酸化して、吸収された硫化水素を酸
化する酸化工程と、 前記有機性物質の嫌気性消化により派生する臭気成分と
空気の混合ガスからなる臭気ガスを前記酸化工程に導入
して脱臭および好気性微生物酸化を行う工程とからなる
ことを特徴とする消化ガスと臭気ガスの同時処理方法。1. An anaerobic digestion facility performs anaerobic microbial digestion of organic substances to obtain 1 / l of the digestive juice of the anaerobic digestion facility.
Aerobic by introducing 10,000 to 1/10 to aerobic oxidizer
A method of performing oxidative oxidation, in which the digestion gas generated by digestion of anaerobic microorganisms is adjusted to pH 7-
An absorption step of causing the cleaning solution to absorb hydrogen sulfide in the digestive gas by bringing it into contact with a cleaning solution composed of a mixed solution or a treatment solution in the aerobic oxidation device maintained at 9; To the aerobic oxidizer
And Oite aerobic microbial oxidation, an oxidation step of oxidizing the absorbed hydrogen sulfide, and odor components derived by anaerobic digestion of the organic material
A method for simultaneous treatment of digestive gas and odorous gas, comprising the step of introducing an odorous gas composed of a mixed gas of air into the oxidation step to perform deodorization and aerobic microbial oxidation.
るメタン生成槽を有する請求項1記載の消化ガスと臭気
ガスの同時処理方法。 2. The anaerobic digestion facility comprises a UASB reactor.
Digestion gas and odor according to claim 1 having a methane production tank
Simultaneous gas treatment method.
ガスを発生させる嫌気性消化施設と、An anaerobic digestion facility that produces gas, 嫌気性消化施設の消化液の1/10000〜1/10を1/10000 ~ 1/10 of the digestive juice of anaerobic digestion facility
導入し、好気性微生物酸化して有機物を分解する好気性Introduce aerobic microorganisms to oxidize and decompose organic matter
酸化装置と、An oxidizer, 前記嫌気性消化施設で発生する消化ガスを、pH7〜9The digestive gas generated in the anaerobic digestion facility is adjusted to pH 7-9.
に維持された前記好気性酸化装置における混合液またはMixed solution in the aerobic oxidizer maintained at
処理液からなる洗浄液と接触させて、前記消化ガス中のBy contacting it with a cleaning liquid consisting of the treatment liquid,
硫化水素を前記洗浄液に吸収させる吸収装置と、An absorption device for absorbing hydrogen sulfide into the cleaning liquid, 前記嫌気性消化施設から前記吸収装置に消化ガスを供給Supply digestion gas from the anaerobic digestion facility to the absorber
する消化ガス供給路と、Digestive gas supply channel 前記好気性酸化装置から前記吸収装置に混合液または処Mixture or treatment from the aerobic oxidizer to the absorber.
理液を供給する送液路と、A liquid supply path for supplying a physical fluid, 前記嫌気性消化施設で派生する臭気成分と空気の混合ガGas mixture of odorous components and air derived from the anaerobic digestion facility
スからなる臭気ガスを前記好気性酸化装置に供給する臭Odor that supplies odorous gas consisting of oxygen to the aerobic oxidizer
気ガス供給路と、An air-gas supply path, 前記吸収装置から前記好気性酸化装置に吸収液を返送すReturn absorption liquid from the absorber to the aerobic oxidizer
る返送液路とAnd the return liquid path を有することを特徴とする消化ガスと臭気Digestive gas and odor characterized by having
ガスの同時処理装置。Simultaneous gas processing equipment.
るメタン生成槽を有する請求項3記載の消化ガスと臭気Digestion gas and odor according to claim 3, which has a methane production tank.
ガスの同時処理装置。Simultaneous gas processing equipment.
Priority Applications (1)
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---|---|---|---|
JP30562692A JP3413856B2 (en) | 1992-11-16 | 1992-11-16 | Method and apparatus for simultaneous treatment of digestive gas and odorous gas |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP30562692A JP3413856B2 (en) | 1992-11-16 | 1992-11-16 | Method and apparatus for simultaneous treatment of digestive gas and odorous gas |
Publications (2)
Publication Number | Publication Date |
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JPH06142449A JPH06142449A (en) | 1994-05-24 |
JP3413856B2 true JP3413856B2 (en) | 2003-06-09 |
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JP30562692A Expired - Lifetime JP3413856B2 (en) | 1992-11-16 | 1992-11-16 | Method and apparatus for simultaneous treatment of digestive gas and odorous gas |
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JP3723994B2 (en) * | 1994-08-03 | 2005-12-07 | 栗田工業株式会社 | Anaerobic biological reaction gas desulfurization equipment |
JP2006008875A (en) * | 2004-06-28 | 2006-01-12 | Fuji Electric Holdings Co Ltd | Digestion gas power generator |
KR100936540B1 (en) * | 2009-02-16 | 2010-01-13 | 이상범 | Apart-shaped anaerobic digester for producing biogas |
WO2024084605A1 (en) * | 2022-10-19 | 2024-04-25 | 三菱電機株式会社 | Carbon dioxide recovery method |
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