JP3729719B2

JP3729719B2 - Organic wastewater treatment apparatus and method by anaerobic aerobic filter method

Info

Publication number: JP3729719B2
Application number: JP2000280526A
Authority: JP
Inventors: 富雄鈴木
Original assignee: 株式会社ヒデケン設計
Priority date: 2000-09-14
Filing date: 2000-09-14
Publication date: 2005-12-21
Anticipated expiration: 2020-09-14
Also published as: JP2002086187A

Description

【０００１】
【発明の属する技術分野】
本発明は、嫌気性生物処理と好気性生物処理とを組み合わせた嫌気好気ろ床法による有機性廃水処理装置及び方法に関し、具体的には臭気の処理に関する。
【０００２】
【従来の技術】
嫌気好気ろ床法とは、嫌気性処理と好気性処理の２工程から構成され、有機物除去の主力を嫌気性処理に置き、仕上げ処理として好気性処理を組み合わせた廃水処理システムである。
【０００３】
気密構造の処理槽で行われる嫌気性処理では、廃水中に溶存酸素が存在しなかったり、不十分なときに活動する嫌気性微生物によって、有機物が分解し、最終生成物としてメタンガスや炭酸ガスが生じる。硫黄系有機物が含まれる場合は、分解により硫化水素が発生する。
【０００４】
嫌気性処理には酸素の供給が不要である。さらに、有機物の大半がメタンガスや炭酸ガスに分解されるから、汚泥発生量を少なくできるという利点がある。一方、反応に長時間を要するという欠点があり、通常の廃水処理では、そこで発生する汚泥処理に利用されることが多い。
【０００５】
一般には開放構造の処理槽で行われる好気性処理は、通常の廃水処理に広く利用されており、溶存酸素が存在するときに活動する微生物によって、有機物が好気性微生物の餌となり、微生物を増殖し、余剰汚泥が生じる。有機物に対する好気性微生物の働きは酸化作用である。
【０００６】
嫌気性処理と好気性処理の２工程から構成される嫌気好気ろ床法は、曝気に必要な動力としては好気性処理において少量用いるだけですむので、経済的であるという利点があり、例えば特公平１−４４３９７号公報に開示されている。
【０００７】
嫌気性消化反応槽の下部に汚泥が堆積する空間が設けられており、該空間の上に配置されたろ材により、廃水の嫌気性消化反応を行わせると、廃水から分離した汚泥が前記空間内に貯留される。一定期間の処理毎に、この汚泥を引き抜く。
【０００８】
このような嫌気好気ろ床法による有機性廃水処理の問題点の一つは、硫化水素などの悪臭物質が発生することである。この悪臭物質は、嫌気性消化処理によって発生するメタンガス等に同伴され、ガス化する。
【０００９】
この悪臭ガスが含まれる嫌気性消化ガスは、例えば嫌気性消化槽上部の内壁を腐食する原因となるほか、外気に漏洩し、作業員や近隣の住民に不快感を与える。また、設備の室内に拡散した排気が、接触した電気部品を腐食するなどの弊害を起こす。場合によっては、排気が特定の空間に充満して、作業環境を危険にさらすこともある。
【００１０】
嫌気性消化処理をした処理水には、残存するＢＯＤの除去、及び処理水に溶存酸素を与えるために、好気性処理を行う。好気性処理では、酸素濃度を高めた酸素富化ガスを使う場合と、空気を使用する場合がある。一般には、空気を用いて曝気操作を行うことが多く、水中に気泡を発生させ、気液接触を図って、酸素を供給する方法が採られる。好気性処理に空気を送って曝気をした場合には、液中に含まれる硫化水素等の還元性物質がガス化して気泡に同伴し、好気性処理槽からの排気に臭気が伴うことになる。
【００１１】
従来、排気の脱臭処理は、換気用送風機を設けて、脱臭した後、外気に放流していた。この換気用送風機の運転が、臭気処理の経費の大半を占めていた。
【００１２】
また、脱臭処理が停止すると、悪臭拡散の影響が出るので、脱臭処理は連続して行う必要があり、エネルギー消費の経費が処理費用を増大させる原因となっていた。
【００１３】
【発明が解決しようとする課題】
本発明は、換気用送風機を省略し、かつ、効率よく脱臭処理ができる有機性廃水処理装置及び方法を提供することを目的とする。
【００１４】
【課題を解決するための手段】
本発明の構成は、基本的には、好気性処理槽をその排気が外気に発散しないように、気体が外部へ漏れない気密構造とし、曝気用送風機の圧力を利用して曝気排気（有臭ガス）を脱臭装置に導入する。
【００１５】
本発明の有機性廃水処理装置は、流入する有機性廃水を消化処理するために、横方向に広がりのある複数の塊または集合体の形の嫌気性接触ろ材が横方向に一定間隔で並べられ、上下に一部が一定間隔で重なり合うように複数段に配設された第１嫌気性処理槽と、第１嫌気性処理槽からの処理水を受け入れる手段を有し、任意の接触ろ材が充填された第２嫌気性処理槽と、第２嫌気性処理槽からの処理水を受け入れる手段、曝気用送風機からの送風により酸化処理する手段、及び処理水を排出する手段を備えた気密構造の好気性処理槽からなり、第２嫌気性処理槽及び好気性処理槽で生成された汚泥を第１嫌気性処理槽に返送する装置、及び消化処理した後の汚泥を第１嫌気性処理槽から排出する装置を設ける。さらに、好気性処理槽の上部空間を直接に、あるいは第２嫌気性処理槽及び第１嫌気性処理槽の少なくとも一方の上部空間を順次接続して脱臭装置に連通させる排気手段、例えばダクトを備える。
【００１６】
さらに、別の態様では、第２嫌気性処理槽と好気性処理槽の間に、脱窒菌を保持した担体を充填した脱窒反応槽と、硝化菌を保持した担体を充填した硝化反応槽を設けて、前記脱窒反応槽は、第２嫌気性接触消化槽からの処理水を導入する手段、および硝化反応槽の処理水の一部を、担体と共に、あるいは担体の搬送なしに、導入する手段を備え、前記硝化反応槽は、脱窒反応槽からの処理水を担体と共に、あるいは担体の搬送なしに、導入する手段、および曝気用送風機からの送風により酸化処理する手段を備え、前記好気性処理槽は、硝化反応槽から硝化反応ずみ処理水のみを導入する手段、および曝気用送風機からの送風により酸化処理する手段を備え、硝化反応槽と好気性処理槽の少なくとも一方を気密構造として前述のように排気手段で脱臭装置に接続してもよい。
【００１７】
あるいは、別の態様では、第２嫌気性処理槽と好気性処理槽の間に、脱窒菌を保持した担体を充填した第１脱窒反応槽および第２脱窒反応槽と、硝化菌を保持した担体を充填した第１硝化反応槽および第２硝化反応槽を設けて、前記第１脱窒反応槽は、第２嫌気性接触消化槽からの処理水を導入する手段、および第１硝化反応槽の処理水の一部を担体と共に、あるいは担体の搬送なしに、導入する手段を備え、前記第１硝化反応槽は、第１脱窒反応槽からの処理水を担体と共に、あるいは担体の搬送なしに、導入する手段および曝気用送風機からの送風により酸化処理する手段を備え、前記第２脱窒反応槽は、第１硝化反応槽から硝化反応ずみ処理水のみを導入する手段、および第２硝化反応槽の処理水の一部を担体と共に、あるいは担体の搬送なしに、導入する手段を備え、前記第２硝化反応槽は、第２脱窒反応槽からの処理水を担体と共に、あるいは担体の搬送なしに、導入する手段および曝気用送風機からの送風により酸化処理する手段を備え、前記好気性処理槽は、第２硝化反応槽から硝化反応ずみ処理水のみを導入する手段、および曝気用送風機からの送風により酸化処理する手段を備え、第１硝化反応槽、第２硝化反応槽および好気性処理槽の少なくとも一つを気密構造として、前述のように脱臭装置に排気手段で接続してもよい。
【００１８】
前記好気性処理槽の上部空間、第１嫌気性処理槽の上部空間、第２嫌気性処理槽の上部空間及び脱臭装置の内部を、大気圧に対し負圧に保たれるように、脱臭装置の排出側に、補助吸引ブロワーを設けるとよい。
【００１９】
本発明の有機性廃水の処理方法は、上記の有機性廃水処理装置により、流入する有機性廃水を第１嫌気性処理槽における処理、続いて第２嫌気性処理槽における処理を行い、続いて好気性処理槽で好気性酸化処理し、第２嫌気性処理槽及び好気性処理槽で生成された汚泥を第１嫌気性処理槽に返送して、流入する有機性廃水と共に嫌気性消化処理した後に汚泥を第１嫌気性処理槽から排出するに際し、曝気用送風機からの送風により、好気性処理槽の上部空間から直接に、あるいは第２嫌気性処理槽及び第１嫌気性処理槽の少なくとも一方の上部空間を経て、脱臭装置に槽内生成ガスを搬送し、脱臭した排気を脱臭装置から外気に放流する。第１嫌気性処理槽や第２嫌気性処理槽を経る場合には、嫌気性発酵により発生したガスが高濃度に保たれている密閉された嫌気性ろ床の上の上部空間に、好気性処理の曝気排気が供給されることにより、前記高濃度ガスが希釈される。これにより、嫌気性処理槽の上部空間における壁面の腐食を防止できる。
【００２０】
また、第２嫌気性処理槽と好気性処理槽の間で、脱窒・硝化処理を行う場合は、硝化反応槽の上部空間から直接に、あるいは第２嫌気性処理槽及び第１嫌気性処理槽の少なくとも一方の上部空間を経て、脱臭装置に槽内生成ガスを搬送し、脱臭した排気を脱臭装置から外気に放流する。
【００２１】
なお、第１嫌気性処理槽の前に、流入する有機性廃水の夾雑物及び沈降性の土砂等を除去する前処理装置を設けるのが好ましい。
【００２２】
好気性処理には、沈殿池を使用しない好気性ろ床や、曝気槽と沈殿槽を使用する活性汚泥法を適用できる。
【００２３】
【発明の実施の形態】
本発明の装置の実施態様を、図面に基づいて説明する。
【００２４】
図１は、本発明の一実施例を示したブロック図である。第１嫌気性処理槽Ａ、第２嫌気性処理槽Ｃ、好気性処理槽Ｂの内部は、断面図で詳細を示した。
【００２５】
第１嫌気性処理槽Ａは、側壁が平行な、筒状のろ床部１とその下のホッパー部２からなる。ろ床部１の上には沈砂池（図示せず）に連通した流入部３が接続される。流入部３には流入管５が接続する。流入管５は、ろ床部１の中心部に垂直に配置され、その下端はホッパー部２の下部に開口する。さらに、第１嫌気性処理槽Ａの下端には汚泥引抜き管８が接続され、上部には処理水の排出管９が接続される。
【００２６】
第１嫌気性処理槽Ａ内には、複数段の嫌気性ろ床６が上下方向に互いに所要の間隙７をもって配設される。嫌気性ろ床６には、例えば、嫌気性ろ材を載せるために横方向に広がる部材、例えば皿状部材を空間的に配置する。それぞれの皿の底には、スリット状の穴を設ける。嫌気性接触ろ材は、例えば耐食性があり、成形しやすいプラスチックが使用できる。又、皿状部材の上に載せる代わりに、嵩張る一定体積の嫌気性接触ろ材（塊状の接触ろ材）を直接に配置してもよい。
【００２７】
このような接触ろ材により、接触ろ材に堆積した汚泥の沈殿及び浮上の動きを許容でき、攪拌を行わなくても、嫌気性消化、沈殿分離などの性能を維持できる。
【００２８】
また、このような構成により、槽底部に堆積した汚泥が嫌気性発酵により浮上しても、皿状部材に衝突して、汚泥内のガスのみが浮上でき、汚泥自体は再び沈殿するので、嫌気性消化、沈殿分離などの効率を高められ、槽内の上澄水をきれいに保持できる。
【００２９】
嫌気性ろ床６の配列間隔などは、実操業の経験に基づいて最適化される。
【００３０】
第１嫌気性処理槽Ａの上部空間には、２本の排気ダクト２１、２２が開口し、排気ダクト２２は脱臭装置３０の吸引側に接続され、排気ダクト２１は第２嫌気性処理槽Ｃの上部空間に接続される。
【００３１】
第１嫌気性処理槽Ａの後の第２嫌気性処理槽Ｃには、通常のろ床を使用し、処理効果を高める。さらに、第２嫌気性処理槽Ｃの後の第３嫌気性処理槽（図示せず）には、細かいろ材を使用し、処理水のＢＯＤを極めて低くすることができる。
【００３２】
第２嫌気性処理槽Ｃの下端には、汚泥返送管１４が接続され、汚泥返送管１４の端部は第１嫌気性処理槽Ａの流入部３に連通される。
【００３３】
第２嫌気性処理槽Ｃの上部空間には、前記排気ダクト２１及び排気ダクト２０が接続され、排気ダクト２０は好気性処理槽Ｂの上部空間に接続される。
【００３４】
好気性処理槽Ｂは、好気性ろ床部からなる。好気性ろ床部１１の中心部に上下方向の流通管１０が垂直に配置される。従って、嫌気性消化処理された処理水が流通管１０の上端から入り、下端から出て、好気性ろ床部１１を上昇するようになっている。そして、上部には浄水流出管１３が接続される。
【００３５】
好気性処理槽Ｂの下端には、汚泥返送管１４が接続され、汚泥返送管１４の端部は第１嫌気性処理槽Ａの流入部３に連通される。
【００３６】
好気性処理槽Ｂの上部空間には、前記排気ダクト２０が接続される。
【００３７】
好気性処理槽Ｂの下部には、曝気用送風機ＢＬ１からの散気管１６が開口する。好気性ろ床部１１を上昇する処理水は、散気管１６から出る曝気用空気に十分に接触できる。曝気用空気の送風容量は、前記浄水流出管１３に備えた適当な計器で流量を測定し、ＢＯＤ処理、アンモニアの硝化、還元性物質の酸化、溶存酸素などに必要な酸素量に、適当な、例えば２０％の余裕を加えて決定する。
【００３８】
脱臭装置３０は、生物脱臭や散水する中に通気させて臭気を溶け込ませて除去する好気性処理の例、活性炭に吸着させる装置など、周知の技術に基づく装置を、単独で用いたり、組み合わせて用いる。
【００３９】
本発明の有機性廃水処理方法によれば、嫌気好気ろ床法における好気性処理槽の有臭ガスを漏洩させることなく、脱臭装置に導入できることはもとより、嫌気性発酵により発生し、接触する嫌気性処理槽の壁面を腐食するガスを、好気性処理槽からの曝気排気を供給して希釈し、脱臭装置に導き、十分に脱臭した後、外気に放流することができる。
【００４０】
すなわち、好気性処理槽Ｂの上部空間に上昇した排気は、前記排気ダクト２０を通じて第２嫌気性処理槽Ｃの上部空間に送気され、第２嫌気性処理槽Ｃ内で嫌気性発酵により生じたガスと混合される。この混合ガスは、第２嫌気性処理槽Ｃから排気ダクト２１を通じて第１嫌気性処理槽Ａの上部空間に送気され、第１嫌気性処理槽Ａ内で嫌気性発酵により生じたガスと混合される。この混合ガスは、第１嫌気性処理槽Ａから排気ダクト２２を通じて脱臭装置３０に送気され、脱臭装置３０で脱臭処理の後、排気ダクト２３から系外に排出される。該排気ダクト２３の途中に補助吸引ブロワーＢＬ２を備える。なお、図示の例の場合は、処理槽間をダクトで接続しているが、処理槽が直接に隣り合って接続している場合には、処理槽の壁に孔をあけて、ダクトに代えてもよい。すなわち、通気手段であれば、ダクトに限らない。
【００４１】
曝気用送風機ＢＬ１は、第１嫌気性処理槽Ａ、第２嫌気性処理槽Ｃ、好気性処理槽Ｂ、排気ダクト２０、２１、２２からなる排気系統からガスが漏れない状態に（それぞれの水面から上方の構造を、気密状態に構成）すれば、有圧排気となる。曝気に用いられる曝気用送風機の吐出圧力は、好気性処理槽Ｂの水深に打ち勝って送風ができるように、例えば圧力４０ｋＰａ程度の送風機が使われるが、上記排気系統に必要な圧力が５００Ｐａ程度であり、排気系統が曝気用送風機にかける負担はほとんどない。従って、前記補助吸引ブロワーＢＬ２は不可欠ではなく、省略することができる。
【００４２】
しかし、前記補助吸引ブロワーＢＬ２は、第１嫌気性処理槽Ａの上部空間、第２嫌気性処理槽Ｃの上部空間、好気性処理槽Ｂの上部空間及び排気ダクト２０、２１、２２からなる排気系統内を、大気圧より低く、すなわち負圧に保たれるように選定、制御することも可能である。この場合には、点検等でこれらの部分を開放する場合や、何らかの原因で排気系統にガスが漏れる原因が生じても、排気系統の外にガスが漏れることがなく、作業環境が常に安全に保たれる効果が得られる。
【００４３】
図２に、本発明の異なる一実施例をブロック図で示した。図１に示した実施例とは、好気性処理槽Ｂからの排気ダクト２０が直接、脱臭装置３０に接続されている点で異なる。他の部分は、図１と同様に構成されている。
【００４４】
図３に、本発明の異なる一実施例をブロック図で示した。図１に示した実施例とは、第２嫌気性処理槽Ｃからの処理水９を、脱窒反応槽Ｄに導入し、該脱窒反応槽Ｄからの処理水３１を、曝気用送風機ＢＬ３を備えた硝化反応槽Ｅに導入し、消化反応槽Ｅの処理水の一部４２を脱窒処理槽Ｄに返送し、硝化反応槽Ｅで発生するガスを、送風機ＢＬ３の送風圧力で脱臭装置３０に導入する排気ダクト２４を備える点で異なる。なお、排気ダクト２０と排気ダクト２４の一方を省略してもよい。
【００４５】
図４に、本発明の異なる一実施例をブロック図で示した。図１に示した実施例とは、第２嫌気性処理槽Ｃからの処理水９を、第１脱窒反応槽Ｄ１に導入し、第１脱窒反応槽Ｄ１からの処理水３１を、曝気用送風機ＢＬ３を備えた第１硝化反応槽Ｅ１に導入し、第１硝化反応槽Ｅ１の処理水の一部４２を第１脱窒処理槽Ｄ１に返送し、第１硝化反応槽Ｅ１の処理水の一部４３を、第２脱窒反応槽Ｄ２に導入し、第２脱窒反応槽Ｄ２からの処理水３６を、曝気用送風機ＢＬ４を備えた第２硝化反応槽Ｅ２に導入し、第２硝化反応槽Ｅ２の処理水の一部４７を第２脱窒処理槽Ｄ２に返送し、第１硝化反応槽Ｅ１および第２硝化反応槽Ｅ２で発生するガスを、それぞれ送風機ＢＬ３、４の送風圧力で脱臭装置３０に導入する排気ダクト２４、２５を備える点で異なる。なお、排気ダクト２０、２４、２５のいずれかを省略してもよい。
【００４６】
図２〜４に実施例を示したように、本発明の装置における排気系統に、処理場内で発生したすべての臭気を含む排気や周辺の空気を吸引させ、脱臭装置３０の排気側の補助吸引ブロワーＢＬ２に吸引させるように構成することが可能であり、効果は大きい。
【００４７】
【発明の効果】
以上、詳述したように、本発明の嫌気好気ろ床法による有機性廃水処理装置及び方法により、換気用送風機を使用せず、かつ、効率よく脱臭処理ができ、悪臭の発散を完全に防止することができる。
【図面の簡単な説明】
【図１】本発明の一実施例を示したブロック図である。
【図２】本発明の一実施例を示したブロック図である。
【図３】本発明の一実施例を示したブロック図である。
【図４】本発明の一実施例を示したブロック図である。
【符号の説明】
Ａ、Ｃ嫌気性処理槽
Ｂ好気性処理槽
Ｄ、Ｄ１、Ｄ２脱窒反応槽
Ｅ、Ｅ１、Ｅ２硝化反応槽
ＢＬ１、ＢＬ３、ＢＬ４曝気用送風機
ＢＬ２補助吸引ブロワー
１ろ床部
２ホッパー部
３流入部
５、１０流入管
６嫌気性ろ床
７間隙
８汚泥引抜き管
９、１２、３１、３６、４２、４３、４８排出管
１１好気性ろ床
１３浄水流出管
１４汚泥返送管
１６散気管
２０、２１、２２、２３、２４排気ダクト
３０脱臭装置
７０弁[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an organic wastewater treatment apparatus and method based on an anaerobic aerobic filter method combining anaerobic biological treatment and aerobic biological treatment, and more specifically, to odor treatment.
[0002]
[Prior art]
The anaerobic aerobic filter method is a wastewater treatment system composed of two steps of an anaerobic treatment and an aerobic treatment, in which the main component of organic matter removal is placed in the anaerobic treatment, and the aerobic treatment is combined as a finishing treatment.
[0003]
In the anaerobic treatment performed in a treatment tank with an airtight structure, organic matter is decomposed by anaerobic microorganisms that do not have dissolved oxygen in the wastewater or act when it is insufficient, and methane gas and carbon dioxide as final products. Arise. When sulfur organic matter is contained, hydrogen sulfide is generated by decomposition.
[0004]
The anaerobic treatment does not require oxygen supply. Furthermore, since most of the organic matter is decomposed into methane gas or carbon dioxide gas, there is an advantage that the amount of sludge generated can be reduced. On the other hand, there is a drawback in that the reaction takes a long time, and in normal wastewater treatment, it is often used for treatment of sludge generated there.
[0005]
In general, aerobic treatment performed in a treatment tank with an open structure is widely used for ordinary wastewater treatment, and organic matter becomes food for aerobic microorganisms by microorganisms that are active when dissolved oxygen is present. And surplus sludge is generated. The action of aerobic microorganisms on organic matter is an oxidizing action.
[0006]
The anaerobic aerobic filter method, which consists of two steps of anaerobic treatment and aerobic treatment, has the advantage of being economical because it requires only a small amount of aerobic treatment as the power required for aeration. This is disclosed in Japanese Patent Publication No. 1-44397.
[0007]
A space for depositing sludge is provided in the lower part of the anaerobic digestion reaction tank, and when the anaerobic digestion reaction of the wastewater is performed by the filter medium disposed on the space, the sludge separated from the wastewater is contained in the space. It is stored in. This sludge is pulled out for each treatment for a certain period.
[0008]
One of the problems of organic wastewater treatment by such anaerobic and aerobic filter methods is the generation of malodorous substances such as hydrogen sulfide. This malodorous substance is accompanied by methane gas etc. which generate | occur | produce by anaerobic digestion process, and is gasified.
[0009]
The anaerobic digestion gas containing this malodorous gas causes, for example, corrosion of the inner wall of the upper part of the anaerobic digestion tank, leaks to the outside air, and gives uncomfortable feelings to workers and neighboring residents. In addition, the exhaust diffused in the room of the facility causes harmful effects such as corrosion of the contacted electrical components. In some cases, exhaust can fill a particular space and endanger the work environment.
[0010]
The treated water subjected to the anaerobic digestion treatment is subjected to an aerobic treatment in order to remove the remaining BOD and to give dissolved oxygen to the treated water. In the aerobic treatment, an oxygen-enriched gas with an increased oxygen concentration may be used or air may be used. In general, the aeration operation is often performed using air, and a method of supplying bubbles by generating bubbles in water and making gas-liquid contact is adopted. When aeration is performed by sending air to the aerobic treatment, reducing substances such as hydrogen sulfide contained in the liquid are gasified and accompanied by bubbles, and odor is accompanied by exhaust from the aerobic treatment tank. .
[0011]
Conventionally, exhaust deodorization processing has been performed by providing a ventilation fan to deodorize, and then discharging it to the outside air. The operation of this ventilation fan accounted for most of the cost of odor treatment.
[0012]
Moreover, when the deodorizing process is stopped, the influence of malodorous odors is exerted. Therefore, the deodorizing process needs to be continuously performed, and the cost of energy consumption is a cause of increasing the processing cost.
[0013]
[Problems to be solved by the invention]
It is an object of the present invention to provide an organic wastewater treatment apparatus and method that can omit a ventilation fan and can efficiently perform a deodorization treatment.
[0014]
[Means for Solving the Problems]
The configuration of the present invention basically has an aerobic treatment tank with an airtight structure in which gas does not leak to the outside so that the exhaust does not diverge into the outside air, and aeration exhaust (odorous) using the pressure of the aeration fan. Gas) is introduced into the deodorizer.
[0015]
In the organic wastewater treatment apparatus of the present invention, in order to digest organic wastewater that flows in, anaerobic contact filter media in the form of a plurality of masses or aggregates extending in the lateral direction are arranged at regular intervals in the lateral direction. The first anaerobic treatment tank is arranged in a plurality of stages so that the upper and lower parts are overlapped at regular intervals, and has means for receiving the treated water from the first anaerobic treatment tank, and is filled with an arbitrary contact filter medium A second anaerobic treatment tank, a means for receiving treated water from the second anaerobic treatment tank, a means for oxidizing treatment by blowing air from an aeration blower, and a means for discharging the treated water. It consists of an aerobic treatment tank, and the device that returns the sludge generated in the second anaerobic treatment tank and the aerobic treatment tank to the first anaerobic treatment tank, and the sludge after the digestion treatment are discharged from the first anaerobic treatment tank. A device is provided. Furthermore, an exhaust means, for example, a duct, is provided which connects the upper space of the aerobic treatment tank directly or at least one upper space of the second anaerobic treatment tank and the first anaerobic treatment tank to communicate with the deodorizing apparatus. .
[0016]
Furthermore, in another aspect, a denitrification reaction tank filled with a carrier holding denitrifying bacteria and a nitrification reaction tank filled with a carrier holding nitrifying bacteria between the second anaerobic treatment tank and the aerobic treatment tank. The denitrification reaction tank is provided with a means for introducing treated water from the second anaerobic catalytic digestion tank, and a part of the treated water in the nitrification reaction tank, together with the carrier or without carrying the carrier. The nitrification reaction tank comprises means for introducing the treated water from the denitrification reaction tank together with the carrier or without carrying the carrier, and means for oxidizing the air by blowing from the aeration blower. The aerobic treatment tank comprises means for introducing only nitrification reaction-treated water from the nitrification reaction tank, and means for oxidation treatment by blowing air from an aeration blower, and at least one of the nitrification reaction tank and the aerobic treatment tank has an airtight structure. Exhaust as before It may be connected to the deodorizing device in the stage.
[0017]
Alternatively, in another aspect, a first denitrification reaction tank and a second denitrification reaction tank filled with a carrier holding denitrifying bacteria between the second anaerobic treatment tank and the aerobic treatment tank, and nitrifying bacteria are held. A first nitrification reaction tank and a second nitrification reaction tank filled with the supported carrier, wherein the first denitrification reaction tank includes means for introducing treated water from the second anaerobic contact digestion tank, and the first nitrification reaction The first nitrification reaction tank is provided with means for introducing a part of the treated water in the tank together with the carrier or without carrying the carrier, and the first nitrification reaction tank carries the treated water from the first denitrification reaction tank together with the carrier or the carrier. And means for introducing and means for oxidizing by blowing from an aeration blower, and the second denitrification reaction tank introduces only nitrification reaction-treated water from the first nitrification reaction tank, and second Part of the treated water in the nitrification reaction tank along with the carrier or the carrier The second nitrification reaction tank is equipped with means for introducing the treatment water from the second denitrification reaction tank together with the carrier or without carrying the carrier by blowing air from the aeration fan. The aerobic treatment tank is provided with means for oxidation treatment, the aerobic treatment tank is provided with means for introducing only nitrification reaction-treated water from the second nitrification reaction tank, and means for oxidation treatment by blowing air from an aeration blower. At least one of the tank, the second nitrification reaction tank, and the aerobic treatment tank may have an airtight structure and may be connected to the deodorizing apparatus by the exhaust means as described above.
[0018]
The deodorizing device so that the upper space of the aerobic treatment tank, the upper space of the first anaerobic treatment tank, the upper space of the second anaerobic treatment tank, and the interior of the deodorization device are maintained at a negative pressure relative to the atmospheric pressure. An auxiliary suction blower may be provided on the discharge side.
[0019]
In the organic wastewater treatment method of the present invention, the inflowing organic wastewater is treated in the first anaerobic treatment tank, followed by the treatment in the second anaerobic treatment tank by the above-described organic wastewater treatment apparatus. Aerobic oxidation treatment in the aerobic treatment tank, sludge generated in the second anaerobic treatment tank and the aerobic treatment tank is returned to the first anaerobic treatment tank, and anaerobic digestion treatment is performed with the inflowing organic waste water. When discharging the sludge from the first anaerobic treatment tank later, by blowing air from the aeration fan, directly from the upper space of the aerobic treatment tank, or at least one of the second anaerobic treatment tank and the first anaerobic treatment tank The generated gas in the tank is transported to the deodorizing device through the upper space of the, and the deodorized exhaust is discharged from the deodorizing device to the outside air. In the case of passing through the first anaerobic treatment tank or the second anaerobic treatment tank, the aerobic is formed in the upper space above the sealed anaerobic filter bed in which the gas generated by the anaerobic fermentation is kept at a high concentration. The high-concentration gas is diluted by supplying aeration exhaust for processing. Thereby, corrosion of the wall surface in the upper space of the anaerobic treatment tank can be prevented.
[0020]
Further, when denitrification / nitrification treatment is performed between the second anaerobic treatment tank and the aerobic treatment tank, directly from the upper space of the nitrification reaction tank, or the second anaerobic treatment tank and the first anaerobic treatment tank. Through at least one upper space of the tank, the generated gas in the tank is conveyed to the deodorizing device, and the deodorized exhaust gas is discharged from the deodorizing device to the outside air.
[0021]
In addition, it is preferable to provide the pre-processing apparatus which removes the contaminant of organic waste water which flows in, sedimentary sediment, etc. before the 1st anaerobic processing tank.
[0022]
For the aerobic treatment, an aerobic filter bed that does not use a sedimentation basin or an activated sludge method that uses an aeration tank and a sedimentation tank can be applied.
[0023]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the apparatus of the present invention will be described with reference to the drawings.
[0024]
FIG. 1 is a block diagram showing an embodiment of the present invention. The inside of the 1st anaerobic processing tank A, the 2nd anaerobic processing tank C, and the aerobic processing tank B showed the detail with sectional drawing.
[0025]
The 1st anaerobic processing tank A consists of the cylindrical filter bed part 1 with a parallel side wall, and the hopper part 2 under it. An inflow portion 3 communicating with a sand basin (not shown) is connected on the filter bed portion 1. An inflow pipe 5 is connected to the inflow part 3. The inflow pipe 5 is arranged perpendicularly to the center of the filter bed 1, and its lower end opens at the lower part of the hopper 2. Furthermore, the sludge extraction pipe 8 is connected to the lower end of the first anaerobic treatment tank A, and the treated water discharge pipe 9 is connected to the upper part.
[0026]
In the first anaerobic treatment tank A, a plurality of stages of anaerobic filter beds 6 are arranged in the vertical direction with a required gap 7 therebetween. In the anaerobic filter bed 6, for example, a member that spreads in the lateral direction, for example, a dish-like member, is spatially arranged to place an anaerobic filter medium. A slit-shaped hole is provided at the bottom of each dish. As the anaerobic contact filter medium, for example, a plastic having corrosion resistance and easy to mold can be used. Moreover, you may arrange | position directly the anaerobic contact filter medium (a block-shaped contact filter medium) which is bulky instead of putting on a plate-shaped member.
[0027]
With such a contact filter medium, it is possible to allow sedimentation and floating movement of sludge accumulated on the contact filter medium, and maintain performance such as anaerobic digestion and precipitation separation without stirring.
[0028]
In addition, even if the sludge accumulated on the bottom of the tank rises due to anaerobic fermentation, only the gas in the sludge can rise and the sludge itself settles again. The efficiency of sexual digestion and precipitation separation can be improved, and the supernatant water in the tank can be kept clean.
[0029]
The arrangement interval of the anaerobic filter bed 6 and the like is optimized based on actual operational experience.
[0030]
In the upper space of the first anaerobic treatment tank A, two exhaust ducts 21 and 22 are opened, the exhaust duct 22 is connected to the suction side of the deodorizing device 30, and the exhaust duct 21 is connected to the second anaerobic treatment tank C. Connected to the upper space.
[0031]
In the second anaerobic treatment tank C after the first anaerobic treatment tank A, a normal filter bed is used to enhance the treatment effect. Furthermore, a fine filter medium is used for the 3rd anaerobic processing tank (not shown) after the 2nd anaerobic processing tank C, and BOD of treated water can be made extremely low.
[0032]
The sludge return pipe 14 is connected to the lower end of the second anaerobic treatment tank C, and the end of the sludge return pipe 14 communicates with the inflow part 3 of the first anaerobic treatment tank A.
[0033]
The exhaust duct 21 and the exhaust duct 20 are connected to the upper space of the second anaerobic treatment tank C, and the exhaust duct 20 is connected to the upper space of the aerobic treatment tank B.
[0034]
The aerobic treatment tank B includes an aerobic filter bed. A vertical flow pipe 10 is vertically arranged at the center of the aerobic filter bed 11. Accordingly, the anaerobic digested treated water enters from the upper end of the flow pipe 10 and exits from the lower end to ascend the aerobic filter bed 11. And the purified water outflow pipe 13 is connected to the upper part.
[0035]
The sludge return pipe 14 is connected to the lower end of the aerobic treatment tank B, and the end of the sludge return pipe 14 communicates with the inflow part 3 of the first anaerobic treatment tank A.
[0036]
The exhaust duct 20 is connected to the upper space of the aerobic treatment tank B.
[0037]
In the lower part of the aerobic treatment tank B, an air diffuser 16 from the aeration blower BL1 opens. The treated water rising up the aerobic filter bed 11 can sufficiently come into contact with the aeration air coming out of the air diffuser 16. The aeration capacity of the aeration air is determined by measuring the flow rate with an appropriate instrument provided in the purified water outflow pipe 13, and is suitable for the amount of oxygen required for BOD treatment, nitrification of ammonia, oxidation of reducing substances, dissolved oxygen, etc. For example, it is determined by adding a margin of 20%.
[0038]
The deodorization device 30 is a device that is based on a well-known technique, such as an aerobic treatment in which aeration is performed by aeration during biological deodorization or watering, and an odor is dissolved and removed, or a device based on a well-known technique such as a device that is adsorbed on activated carbon. Use.
[0039]
According to the organic wastewater treatment method of the present invention, it can be introduced into the deodorizer without leaking the odorous gas in the aerobic treatment tank in the anaerobic aerobic filtration method, and it is generated by anaerobic fermentation and contacts. A gas that corrodes the wall of the anaerobic treatment tank can be diluted by supplying aeration exhaust from the aerobic treatment tank, guided to a deodorization device, and sufficiently deodorized, and then discharged to the outside air.
[0040]
That is, the exhaust gas that has risen into the upper space of the aerobic treatment tank B is sent to the upper space of the second anaerobic treatment tank C through the exhaust duct 20 and is generated by anaerobic fermentation in the second anaerobic treatment tank C. Mixed with fresh gas. This mixed gas is sent from the second anaerobic treatment tank C to the upper space of the first anaerobic treatment tank A through the exhaust duct 21 and mixed with the gas generated by anaerobic fermentation in the first anaerobic treatment tank A. Is done. This mixed gas is sent from the first anaerobic treatment tank A to the deodorizing device 30 through the exhaust duct 22, and after being deodorized by the deodorizing device 30, is discharged out of the system from the exhaust duct 23. An auxiliary suction blower BL2 is provided in the middle of the exhaust duct 23. In the example shown in the figure, the processing tanks are connected by a duct. However, when the processing tanks are directly connected to each other, a hole is formed in the wall of the processing tank and the duct is replaced with a duct. May be. That is, the ventilation means is not limited to the duct.
[0041]
The aeration blower BL1 is in a state in which no gas leaks from the exhaust system including the first anaerobic treatment tank A, the second anaerobic treatment tank C, the aerobic treatment tank B, and the exhaust ducts 20, 21, and 22 (each water surface). If the structure above is constructed in an airtight state), it becomes a pressure exhaust. As the discharge pressure of the aeration fan used for aeration, for example, a blower having a pressure of about 40 kPa is used so as to overcome the water depth of the aerobic treatment tank B, but the pressure required for the exhaust system is about 500 Pa. Yes, there is almost no burden on the exhaust system by the exhaust system. Accordingly, the auxiliary suction blower BL2 is not essential and can be omitted.
[0042]
However, the auxiliary suction blower BL2 is an exhaust made up of the upper space of the first anaerobic treatment tank A, the upper space of the second anaerobic treatment tank C, the upper space of the aerobic treatment tank B, and the exhaust ducts 20, 21, and 22. It is also possible to select and control the system so that it is lower than atmospheric pressure, that is, maintained at a negative pressure. In this case, if these parts are opened for inspection, etc., or if there is a cause of gas leaking to the exhaust system for some reason, gas will not leak outside the exhaust system, and the work environment will always be safe. A maintained effect is obtained.
[0043]
FIG. 2 is a block diagram showing a different embodiment of the present invention. This embodiment differs from the embodiment shown in FIG. 1 in that the exhaust duct 20 from the aerobic treatment tank B is directly connected to the deodorizing device 30. Other parts are configured in the same manner as in FIG.
[0044]
FIG. 3 is a block diagram showing a different embodiment of the present invention. In the embodiment shown in FIG. 1, the treated water 9 from the second anaerobic treatment tank C is introduced into the denitrification reaction tank D, and the treated water 31 from the denitrification reaction tank D is supplied to the aeration blower BL3. Is introduced into the nitrification reaction tank E, part of the treated water 42 in the digestion reaction tank E is returned to the denitrification treatment tank D, and the gas generated in the nitrification reaction tank E is deodorized by the blowing pressure of the blower BL3. The difference is that an exhaust duct 24 to be introduced into 30 is provided. One of the exhaust duct 20 and the exhaust duct 24 may be omitted.
[0045]
FIG. 4 is a block diagram showing a different embodiment of the present invention. In the embodiment shown in FIG. 1, the treated water 9 from the second anaerobic treatment tank C is introduced into the first denitrification reaction tank D1, and the treated water 31 from the first denitrification reaction tank D1 is aerated. Is introduced into a first nitrification reaction tank E1 equipped with a blower BL3, a part 42 of treated water in the first nitrification reaction tank E1 is returned to the first denitrification treatment tank D1, and treated water in the first nitrification reaction tank E1. Is introduced into the second denitrification reaction tank D2, the treated water 36 from the second denitrification reaction tank D2 is introduced into the second nitrification reaction tank E2 equipped with the aeration fan BL4, and the second denitrification reaction tank D2 is introduced. A part 47 of the treated water in the nitrification reaction tank E2 is returned to the second denitrification treatment tank D2, and the gas generated in the first nitrification reaction tank E1 and the second nitrification reaction tank E2 is blown by the blowers BL3 and BL4, respectively. Are different in that they are provided with exhaust ducts 24 and 25 introduced into the deodorizing device 30. Any one of the exhaust ducts 20, 24, and 25 may be omitted.
[0046]
As shown in FIGS. 2 to 4, the exhaust system in the apparatus of the present invention sucks exhaust gas including all odors generated in the treatment plant and surrounding air, and auxiliary suction on the exhaust side of the deodorizing apparatus 30. It is possible to make the blower BL2 suck, and the effect is great.
[0047]
【The invention's effect】
As described above in detail, the organic wastewater treatment apparatus and method according to the anaerobic and aerobic filter method of the present invention can perform deodorization treatment efficiently without using a blower for ventilation, and completely emit odors. Can be prevented.
[Brief description of the drawings]
FIG. 1 is a block diagram showing an embodiment of the present invention.
FIG. 2 is a block diagram showing an embodiment of the present invention.
FIG. 3 is a block diagram showing an embodiment of the present invention.
FIG. 4 is a block diagram showing an embodiment of the present invention.
[Explanation of symbols]
A, C Anaerobic treatment tank B Aerobic treatment tank D, D1, D2 Denitrification reaction tank E, E1, E2 Nitrification reaction tank BL1, BL3, BL4 Aeration blower BL2 Auxiliary suction blower 1 Filter bed 2 Hopper 3 Inflow Portions 5 and 10 Inflow pipe 6 Anaerobic filter bed 7 Gap 8 Sludge extraction pipes 9, 12, 31, 36, 42, 43, 48 Discharge pipe 11 Aerobic filter bed 13 Purified water outflow pipe 14 Sludge return pipe 16 Aeration pipe 20, 21, 22, 23, 24 Exhaust duct 30 Deodorizer 70 Valve

Claims

流入する有機性廃水を消化処理するために、横方向に広がりのある複数の塊または集合体の形の嫌気性接触ろ材が横方向に一定間隔で並べられ、上下に一部が一定間隔で重なり合うように複数段に配設された第１嫌気性処理槽と、第１嫌気性処理槽からの処理水を受け入れる手段を有し、任意の接触ろ材が充填された第２嫌気性処理槽と、第２嫌気性処理槽からの処理水を受け入れる手段、曝気用送風機からの送風により酸化処理する手段、及び処理水を排出する手段を備えた気密構造の好気性処理槽からなり、第２嫌気性処理槽及び好気性処理槽で生成された汚泥を第１嫌気性処理槽に返送する装置、及び消化処理した後の汚泥を第１嫌気性処理槽から排出する装置を設けた有機性廃水の処理装置において、好気性処理槽の上部空間を直接に、または、第２嫌気性処理槽及び第１嫌気性処理槽の少なくとも一方の上部空間を順次接続して、脱臭装置に連通させる排気ダクトを備えたことを特徴とする有機性廃水処理装置。In order to digest inflowing organic wastewater, anaerobic contact filter media in the form of multiple lumps or aggregates extending in the lateral direction are arranged at regular intervals in the lateral direction, and some overlap vertically A first anaerobic treatment tank arranged in a plurality of stages as described above, a second anaerobic treatment tank having a means for receiving treated water from the first anaerobic treatment tank, and filled with an arbitrary contact filter medium, A second anaerobic treatment tank comprising an aerobic treatment tank having an airtight structure provided with a means for receiving treated water from the second anaerobic treatment tank, a means for oxidizing treatment by blowing air from an aeration fan, and a means for discharging the treated water. Treatment of organic wastewater provided with a device for returning the sludge generated in the treatment tank and the aerobic treatment tank to the first anaerobic treatment tank, and a device for discharging the sludge after digestion treatment from the first anaerobic treatment tank In the device, directly in the upper space of the aerobic treatment tank Or in at least one of the upper space of the second anaerobic treatment tank and first anaerobic treatment tank are sequentially connected, organic wastewater treatment apparatus characterized by comprising an exhaust duct for communicating the deodorizer.

流入する有機性廃水を消化処理するために、横方向に広がりのある複数の塊または集合体の形の嫌気性接触ろ材が横方向に一定間隔で並べられ、上下に一部が一定間隔で重なり合うように複数段に配設された第１嫌気性処理槽と、第１嫌気性処理槽からの処理水を受け入れる手段を有し、任意の接触ろ材が充填された第２嫌気性処理槽と、脱窒菌を保持した担体を充填した脱窒反応槽と、硝化菌を保持した担体を充填した硝化反応槽と、処理水を排出する手段を備えた好気性処理槽とからなり、前記第１嫌気性接触消化槽は、窒素含有有機性廃水を導入する手段を備え、前記第２嫌気性接触消化槽は、第１嫌気性接触消化槽からの処理水を導入する手段を備え、前記脱窒反応槽は、第２嫌気性接触消化槽からの処理水を導入する手段、および硝化反応槽の処理水の一部を、担体と共に、あるいは担体の搬送なしに、導入する手段を備え、前記硝化反応槽は、脱窒反応槽からの処理水を担体と共に、あるいは担体の搬送なしに、導入する手段、および曝気用送風機からの送風により酸化処理する手段を備え、前記好気性処理槽は、硝化反応槽から硝化反応ずみ処理水のみを導入する手段、および曝気用送風機からの送風により酸化処理する手段を備え、第１嫌気性接触消化槽には、第２嫌気性接触消化槽および好気性処理槽において発生する浮遊物および汚泥を返送する手段を備え、第１嫌気性接触消化槽に余剰汚泥を排出する手段を備え、更に好気性処理槽および硝化反応槽の少なくとも一方が気密構造になっていて、その上部空間を直接に、または、第２嫌気性処理槽及び第１嫌気性処理槽の少なくとも一方の上部空間を順次接続して、脱臭装置に連通させる排気ダクトを備えたことを特徴とする有機性廃水処理装置。In order to digest inflowing organic wastewater, anaerobic contact filter media in the form of multiple lumps or aggregates extending in the lateral direction are arranged at regular intervals in the lateral direction, and some overlap vertically A first anaerobic treatment tank arranged in a plurality of stages as described above, a second anaerobic treatment tank having a means for receiving treated water from the first anaerobic treatment tank, and filled with an arbitrary contact filter medium, The first anaerobic tank comprises a denitrification reaction tank filled with a carrier holding denitrifying bacteria, a nitrification reaction tank filled with a carrier holding nitrifying bacteria, and an aerobic treatment tank equipped with means for discharging treated water. The oxidative contact digester comprises means for introducing nitrogen-containing organic wastewater, and the second anaerobic contact digester comprises means for introducing treated water from the first anaerobic contact digester, and the denitrification reaction The tank has means for introducing treated water from the second anaerobic contact digestion tank, and Means for introducing a part of the treated water of the nitrification reaction tank together with the carrier or without transporting the carrier, and the nitrification reaction tank is equipped with the treated water from the denitrification reaction tank together with the carrier or without transporting the carrier. The aerobic treatment tank includes means for introducing only nitrification reaction-treated water from the nitrification reaction tank, and air from the aeration fan. The first anaerobic contact digester is equipped with a means for returning suspended matter and sludge generated in the second anaerobic contact digester and the aerobic treater, and the first anaerobic contact digester. The tank is provided with means for discharging excess sludge, and at least one of the aerobic treatment tank and the nitrification reaction tank has an airtight structure, and the upper space thereof is directly or the second anaerobic treatment tank and the first anaerobic tank. Sequentially connecting at least one of the upper space of the sexual process tank, organic waste water processing apparatus characterized by comprising an exhaust duct for communicating the deodorizer.

流入する有機性廃水を消化処理するために、横方向に広がりのある複数の塊または集合体の形の嫌気性接触ろ材が横方向に一定間隔で並べられ、上下に一部が一定間隔で重なり合うように複数段に配設された第１嫌気性処理槽と、第１嫌気性処理槽からの処理水を受け入れる手段を有し、任意の接触ろ材が充填された第２嫌気性処理槽と、脱窒菌を保持した担体を充填した第１脱窒反応槽および第２脱窒反応槽と、硝化菌を保持した担体を充填した第１硝化反応槽および第２硝化反応槽と、処理水を排出する手段を備えた好気性処理槽とからなり、前記第１脱窒反応槽は、第２嫌気性接触消化槽からの処理水を導入する手段、および第１硝化反応槽の処理水の一部を担体と共に、あるいは担体の搬送なしに、導入する手段を備え、前記第１硝化反応槽は、第１脱窒反応槽からの処理水を担体と共に、あるいは担体の搬送なしに、導入する手段および曝気用送風機からの送風により酸化処理する手段を備え、前記第２脱窒反応槽は、第１硝化反応槽から硝化反応ずみ処理水のみを導入する手段、および第２硝化反応槽の処理水の一部を担体と共に、あるいは担体の搬送なしに、導入する手段を備え、前記第２硝化反応槽は、第２脱窒反応槽からの処理水を担体と共に、あるいは担体の搬送なしに、導入する手段および曝気用送風機からの送風により酸化処理する手段を備え、前記好気性処理槽は、第２硝化反応槽から硝化反応ずみ処理水のみを導入する手段、および曝気用送風機からの送風により酸化処理する手段を備え、第１嫌気性接触消化槽には、第２嫌気性接触消化槽および好気性処理槽において発生する浮遊物および汚泥を返送する手段を備え、第１嫌気性接触消化槽に余剰汚泥を排出する手段を備え、第１硝化反応槽および第２硝化反応槽の少なくとも一方は、気密構造になっていて、その上部空間を直接に、または、第２嫌気性処理槽及び第１嫌気性処理槽の少なくとも一方の上部空間を順次接続して、脱臭装置に連通させる排気ダクトを備えたことを特徴とする有機性廃水処理装置。In order to digest inflowing organic wastewater, anaerobic contact filter media in the form of multiple lumps or aggregates extending in the lateral direction are arranged at regular intervals in the lateral direction, and some overlap vertically A first anaerobic treatment tank arranged in a plurality of stages as described above, a second anaerobic treatment tank having a means for receiving treated water from the first anaerobic treatment tank, and filled with an arbitrary contact filter medium, The first denitrification reaction tank and the second denitrification reaction tank filled with the carrier holding denitrifying bacteria, the first nitrification reaction tank and the second nitrification reaction tank filled with the carrier holding nitrifying bacteria, and the treated water are discharged. A first aerobic treatment tank comprising means for introducing the treatment water from the second anaerobic contact digestion tank, and a part of the treatment water of the first nitrification reaction tank. Means for introducing the first glass together with the carrier or without conveying the carrier. The reaction tank comprises means for introducing the treated water from the first denitrification reaction tank together with the carrier or without carrying the carrier, and means for oxidizing the air by blowing from the aeration blower. The second denitrification reaction tank Comprises means for introducing only the nitrification-reacted treated water from the first nitrification reaction tank, and means for introducing a part of the treated water of the second nitrification reaction tank together with the carrier or without carrying the carrier, 2 The nitrification reaction tank comprises means for introducing treated water from the second denitrification reaction tank together with the carrier or without carrying the carrier and means for oxidizing the air by blowing from the aeration blower, the aerobic treatment tank Comprises a means for introducing only nitrification-reacted treated water from the second nitrification reaction tank and a means for oxidation treatment by blowing air from an aeration blower. Tank and good Provided with means for returning suspended matter and sludge generated in the oxidative treatment tank, provided with means for discharging excess sludge to the first anaerobic contact digestion tank, and at least one of the first nitrification reaction tank and the second nitrification reaction tank is It has an airtight structure, and has an exhaust duct that communicates with the deodorization device by connecting the upper space directly or at least one upper space of the second anaerobic treatment tank and the first anaerobic treatment tank in order. An organic wastewater treatment apparatus characterized by that.

前記好気性処理槽の上部空間、第１嫌気性処理槽の上部空間、第２嫌気性処理槽の上部空間及び脱臭装置の内部を、大気圧に対し負圧に保たれるように、脱臭装置の排出側に、補助吸引ブロワーを設けることを特徴とする請求項１から４のいずれかに記載の有機性廃水処理装置。The deodorizing device so that the upper space of the aerobic treatment tank, the upper space of the first anaerobic treatment tank, the upper space of the second anaerobic treatment tank, and the interior of the deodorization device are maintained at a negative pressure relative to the atmospheric pressure. The organic waste water treatment apparatus according to any one of claims 1 to 4, wherein an auxiliary suction blower is provided on the discharge side.

流入する有機性廃水を消化処理するために、横方向に広がりのある複数の塊または集合体の形の嫌気性接触ろ材が横方向に一定間隔で並べられ、上下に一部が一定間隔で重なり合うように複数段に配設された第１嫌気性処理槽と、第１嫌気性処理槽からの処理水を受け入れる手段を有し、任意の接触ろ材が充填された第２嫌気性処理槽と、第２嫌気性処理槽からの処理水を受け入れる手段、曝気用送風機からの送風により酸化処理する手段、及び処理水を排出する手段を備えた気密構造の好気性処理槽からなり、第２嫌気性処理槽及び好気性処理槽で生成された汚泥を第１嫌気性処理槽に返送する装置、及び消化処理した後の汚泥を第１嫌気性処理槽から排出する装置を設けた有機性廃水処理装置により、流入する有機性廃水を嫌気性消化処理し、続いて好気性酸化処理し、好気性酸化処理された処理水を好気性処理槽から排出すると共に、第２嫌気性処理槽及び好気性処理槽で生成された汚泥を、第１嫌気性処理槽にて、流入する有機性廃水と共に嫌気性消化処理した後に排出する有機性廃水の処理方法において、曝気用送風機からの送風圧力により、好気性処理槽の排気を直接に、あるいは第２嫌気性処理槽及び第１嫌気性処理槽の少なくとも一方の上部空間を経て、脱臭装置に搬送し、脱臭した排気を脱臭装置から外気に放流することを特徴とする有機性廃水処理方法。In order to digest inflowing organic wastewater, anaerobic contact filter media in the form of multiple lumps or aggregates extending in the lateral direction are arranged at regular intervals in the lateral direction, and some overlap vertically A first anaerobic treatment tank arranged in a plurality of stages as described above, a second anaerobic treatment tank having a means for receiving treated water from the first anaerobic treatment tank, and filled with an arbitrary contact filter medium, A second anaerobic treatment tank comprising an aerobic treatment tank having an airtight structure provided with a means for receiving treated water from the second anaerobic treatment tank, a means for oxidizing treatment by blowing air from an aeration fan, and a means for discharging the treated water. Organic wastewater treatment apparatus provided with a device for returning the sludge generated in the treatment tank and the aerobic treatment tank to the first anaerobic treatment tank, and a device for discharging the sludge after the digestion treatment from the first anaerobic treatment tank The organic wastewater that flows in Subsequently, the aerobic oxidation treatment is performed, and the treated water subjected to the aerobic oxidation treatment is discharged from the aerobic treatment tank, and the sludge generated in the second anaerobic treatment tank and the aerobic treatment tank is removed from the first anaerobic tank. In the treatment method of organic wastewater discharged after anaerobic digestion with inflowing organic wastewater in the treatment tank, the exhaust of the aerobic treatment tank is directly or second anaerobic depending on the blowing pressure from the aeration fan An organic wastewater treatment method, characterized in that the deodorized exhaust gas is conveyed to a deodorizing device through at least one upper space of the oxidative treatment tank and the first anaerobic treatment tank, and the deodorized exhaust gas is discharged from the deodorizing apparatus to the outside air.

流入する有機性廃水を消化処理するために、横方向に広がりのある複数の塊または集合体の形の嫌気性接触ろ材が横方向に一定間隔で並べられ、上下に一部が一定間隔で重なり合うように複数段に配設された第１嫌気性処理槽と、第１嫌気性処理槽からの処理水を受け入れる手段を有し、任意の接触ろ材が充填された第２嫌気性処理槽と、脱窒菌を保持した担体を充填した脱窒反応槽と、硝化菌を保持した担体を充填した硝化反応槽と、処理水を排出する手段を備えた好気性処理槽とからなる有機性廃水処理装置により、流入する有機性廃水を嫌気性消化処理し、続いて好気性酸化処理し、好気性酸化処理された処理水を好気性処理槽から排出すると共に、第２嫌気性処理槽及び好気性処理槽で生成された汚泥を、第１嫌気性処理槽にて、流入する有機性廃水と共に嫌気性消化処理した後に排出する有機性廃水の処理方法において、曝気用送風機からの送風圧力により、好気性処理槽および硝化反応槽の少なくとも一方の排気を直接に、あるいは第２嫌気性処理槽及び第１嫌気性処理槽の少なくとも一方の上部空間を経て、脱臭装置に搬送し、脱臭した排気を脱臭装置から外気に放流することを特徴とする有機性廃水処理方法。In order to digest inflowing organic wastewater, anaerobic contact filter media in the form of multiple lumps or aggregates extending in the lateral direction are arranged at regular intervals in the lateral direction, and some overlap vertically A first anaerobic treatment tank arranged in a plurality of stages as described above, a second anaerobic treatment tank having a means for receiving treated water from the first anaerobic treatment tank, and filled with an arbitrary contact filter medium, An organic wastewater treatment apparatus comprising a denitrification reaction tank filled with a carrier holding denitrifying bacteria, a nitrification reaction tank filled with a carrier holding nitrifying bacteria, and an aerobic treatment tank equipped with means for discharging treated water The anaerobic digestion treatment of the inflowing organic waste water, followed by the aerobic oxidation treatment, discharging the treated water subjected to the aerobic oxidation treatment from the aerobic treatment tank, and the second anaerobic treatment tank and the aerobic treatment The sludge generated in the tank flows in the first anaerobic treatment tank. In the method for treating organic wastewater discharged after anaerobic digestion treatment with the organic wastewater to be discharged, the exhaust of at least one of the aerobic treatment tank and the nitrification reaction tank is directly or secondally determined by the blowing pressure from the aeration blower. An organic wastewater treatment method, characterized in that the deodorized exhaust gas is discharged to the outside air from the deodorizer by transporting it to the deodorizer through the upper space of at least one of the anaerobic tank and the first anaerobic tank.

流入する有機性廃水を消化処理するために、横方向に広がりのある複数の塊または集合体の形の嫌気性接触ろ材が横方向に一定間隔で並べられ、上下に一部が一定間隔で重なり合うように複数段に配設された第１嫌気性処理槽と、第１嫌気性処理槽からの処理水を受け入れる手段を有し、任意の接触ろ材が充填された第２嫌気性処理槽と、脱窒菌を保持した担体を充填した第１脱窒反応槽および第２脱窒反応槽と、硝化菌を保持した担体を充填した第１硝化反応槽および第２硝化反応槽と、処理水を排出する手段を備えた好気性処理槽とからなる有機性廃水処理装置により、流入する有機性廃水を嫌気性消化処理し、続いて好気性酸化処理し、好気性酸化処理された処理水を好気性処理槽から排出すると共に、第２嫌気性処理槽及び好気性処理槽で生成された汚泥を、第１嫌気性処理槽にて、流入する有機性廃水と共に嫌気性消化処理した後に排出する有機性廃水の処理方法において、曝気用送風機からの送風圧力により、第１硝化反応槽、第２硝化反応槽および好気性処理槽の少なくとも一つの排気を直接に、あるいは第２嫌気性処理槽及び第１嫌気性処理槽の少なくとも一方の上部空間を経て、脱臭装置に搬送し、脱臭した排気を脱臭装置から外気に放流することを特徴とする有機性廃水処理方法。In order to digest inflowing organic wastewater, anaerobic contact filter media in the form of multiple lumps or aggregates extending in the lateral direction are arranged at regular intervals in the lateral direction, and some overlap vertically A first anaerobic treatment tank arranged in a plurality of stages as described above, a second anaerobic treatment tank having a means for receiving treated water from the first anaerobic treatment tank, and filled with an arbitrary contact filter medium, The first denitrification reaction tank and the second denitrification reaction tank filled with the carrier holding denitrifying bacteria, the first nitrification reaction tank and the second nitrification reaction tank filled with the carrier holding nitrifying bacteria, and the treated water are discharged. Organic wastewater treatment equipment comprising an aerobic treatment tank equipped with a means for anaerobic digestion treatment of inflowing organic wastewater, followed by aerobic oxidation treatment, and aerobic oxidation treatment of treated water While discharging from the treatment tank, the second anaerobic treatment tank and the aerobic treatment In the processing method of the organic wastewater discharged | emitted after anaerobic digestion with the inflowing organic wastewater in the 1st anaerobic processing tank in the 1st anaerobic processing tank, the 1st anaerobic processing tank WHEREIN: By the ventilation pressure from the aeration blower, the 1st At least one exhaust of the nitrification reaction tank, the second nitrification reaction tank, and the aerobic treatment tank is conveyed to the deodorization apparatus directly or through the upper space of at least one of the second anaerobic treatment tank and the first anaerobic treatment tank. And an organic wastewater treatment method, wherein the deodorized exhaust gas is discharged from the deodorizer to the outside air.

脱臭装置の排出側に、補助吸引ブロワーを設け、前記好気性処理槽の上部空間、第１嫌気性処理槽の上部空間、第２嫌気性処理槽の上部空間及び脱臭装置の内部を、大気圧に対し負圧に保たれるようにすることを特徴とする請求項５から７のいずれかに記載の有機性廃水処理方法。An auxiliary suction blower is provided on the discharge side of the deodorizing apparatus, and the upper space of the aerobic treatment tank, the upper space of the first anaerobic treatment tank, the upper space of the second anaerobic treatment tank, and the interior of the deodorization apparatus are at atmospheric pressure. The organic wastewater treatment method according to any one of claims 5 to 7, wherein a negative pressure is maintained.