JP4037663B2 - Biological deodorization method and biological deodorization apparatus - Google Patents

Biological deodorization method and biological deodorization apparatus Download PDF

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JP4037663B2
JP4037663B2 JP2002069953A JP2002069953A JP4037663B2 JP 4037663 B2 JP4037663 B2 JP 4037663B2 JP 2002069953 A JP2002069953 A JP 2002069953A JP 2002069953 A JP2002069953 A JP 2002069953A JP 4037663 B2 JP4037663 B2 JP 4037663B2
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能士 樋口
忠昭 田尻
雅敬 山上
紀繁 関
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Kimura Chemical Plants Co Ltd
Ritsumeikan Trust
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Description

【０００１】
【発明の属する技術分野】
本願発明は、微生物を利用した脱臭方法及び脱臭装置に関し、詳しくは、悪臭成分を含む被処理ガスを、微生物を担持させた担体を充填した領域を通過させることにより脱臭を行う生物脱臭方法及び生物脱臭装置に関する。
【０００２】
【従来の技術及び発明が解決しようとする課題】
近年、下水処理施設、畜産業、食品加工業などを対象とした脱臭技術として、微生物を利用して脱臭を行う生物脱臭法が普及しつつあり、揮発性有機化合物（ＶＯＣ（Volatile Organic Compounds）に由来する悪臭の除去に有効であるとされている。
【０００３】
ところで、従来の生物脱臭法の一つに、土壌、ピート、コンポストなど天然由来の物質や、セラミックに代表される無機物質や各種樹脂などの担体に微生物を担持させて充填塔に充填し、この充填塔の上部から散水して微生物の活性を維持しつつ、充填塔の下部から被処理ガスを通気して脱臭処理を行う方法がある。
【０００４】
しかし、充填塔式の生物脱臭方法においては、運転中に担体に目詰りが生じやすく、圧力損失が大きくなるため、安定して長期間の運転を行うことが困難であるという問題点がある。これは、生物脱臭法により悪臭・ＶＯＣを除去しようとすると微生物の成育が非常に活発になり、増加した微生物とその代謝物が、担体の目詰りの原因となることによるものである。
【０００５】
そこで、上記問題点を解消するために、担体の水洗や薬液洗浄を行う方法が提案、実施されており、通常は、担体の上方から洗浄水や薬液をスプレーすることにより、水分の補給と担体表面の洗浄が行われている。
しかし、洗浄水や薬液をスプレーする方法では、水や薬液が通過する通路が形成されてしまい、水や薬液が同じ通路を通過してしまうため、担体を十分に洗浄することができないのが実情である。
【０００６】
また、従来の充填塔方式の生物脱臭方法では、例えば、充填塔の塔底から被処理ガスが供給され、塔頂から排出されるというように、被処理ガスの供給経路（流路）が一定であるため、脱臭菌に対する負荷の偏りが生じ、効率が低下するという問題点がある。
【０００７】
本願発明は、上記問題点を解決するものであり、担体充填領域を効率よく洗浄することが可能で、長期間にわたって安定して、効率よく運転を行うことが可能な生物脱臭方法及び生物脱臭装置を提供することを目的とする。
【０００８】
【課題を解決するための手段】
上記目的を達成するために、本願発明（請求項１）の生物脱臭方法は、
(ａ)微生物を担持させた担体を充填した領域を複数の担体充填領域に分割し、
(ｂ)各担体充填領域に所定の供給経路で被処理ガスを供給して複数段式に脱臭操作を行いながら、所定の順序で各担体充填領域を洗浄し、
(ｃ)各担体充填領域を洗浄する洗浄操作時には、洗浄が行われる担体充填領域への被処理ガスの供給を停止して洗浄水を供給し、該担体充填領域に洗浄水を溜めて担体を洗浄水に所定時間浸漬させた後、洗浄水を抜き出すことにより、該担体充填領域の洗浄を行うとともに、被処理ガスを、洗浄の対象とされていない他の担体充填領域に所定の供給経路で供給して脱臭操作を行うこと
を特徴とする生物脱臭方法であって、
洗浄が必要となった担体充填領域を、洗浄液により洗浄する洗浄工程に供する一方、
洗浄工程に供されていない複数の担体充填領域のうち、最も先に洗浄工程に供された第１担体充填領域に、悪臭成分を最も高濃度に含有する被処理ガスを供給して１段目脱臭処理を行い、
次に、前記第１担体充填領域の次に洗浄工程に供された第２担体充填領域に、前記第１担体充填領域で１段目脱臭処理が行われた被処理ガスを供給して２段目脱臭処理を行い、
さらに、他の担体充填領域が存在する場合には、第２担体充填領域の次に洗浄工程に供された担体充填領域に、前記第２担体充填領域で２段目脱臭処理が行われた被処理ガスを供給して脱臭処理を行い、以後も、前記洗浄工程で洗浄が行われた直後の担体充填領域の１つ前の担体充填領域までは同様の順序で被処理ガスを供給して脱臭処理を行い、
前記洗浄工程で洗浄が行われた直後の洗浄直後担体充填領域に、その１つ前の担体充填領域で脱臭処理が行われた被処理ガスを供給して、複数段式の脱臭処理のうち、悪臭成分を最も低濃度に含有する被処理ガスを処理する最終段脱臭処理を行い、
その後、洗浄が必要となった時点で、前記１段目脱臭処理を行った第１段担体充填領域を前記洗浄工程に供し、以後同様にして、所定の担体充填領域を洗浄しながら脱臭操作を行うこと
を特徴としている。
【０００９】
各担体充填領域に所定の供給経路で被処理ガスを供給して脱臭操作を行いながら、所定の順序で各担体充填領域（担体を含む担体充填領域）を洗浄し、担体充填領域の洗浄操作時には、該担体充填領域への被処理ガスの供給を停止して洗浄水を供給し、該担体充填領域に洗浄水を溜めて担体を洗浄水に所定時間浸漬させた後、洗浄水を抜き出すことにより該担体充填領域の洗浄を行うとともに、被処理ガスを、洗浄の対象とされていない他の担体充填領域に所定の供給経路で供給して脱臭操作を行うことにより、担体充填領域を洗浄しながら、連続して脱臭操作を行うことが可能になる。
【００１０】
また、担体を洗浄水に所定時間浸漬させた後、洗浄水を抜き出すことにより担体充填領域を洗浄するようにしているので、従来の、洗浄水をスプレーする洗浄方法を用いた場合のように洗浄水の通路が形成されてしまうことにより全体としての洗浄が不十分になるというようなことがなく、所定の担体充填領域を効率よくしかも確実に洗浄することが可能になる。したがって、本願発明の生物脱臭方法によれば、長期間にわたって安定して、効率よく生物脱臭を行うことが可能になる。
【００１１】
なお、本願発明において、「各担体充填領域に所定の供給経路で被処理ガスを供給して脱臭操作を行いながら、所定の順序で各担体充填領域を洗浄し」とは、
(1)常に、複数の担体充填領域のうちのいずれか一つ以上を洗浄しながら、他の担体充填領域において脱臭操作を行う場合と、
(2)複数の担体充填領域のうちのいずれかを洗浄しながら、他の担体充填領域において脱臭操作を行っている状態と、いずれの担体充填領域も洗浄しておらず、すべての担体充填領域において脱臭操作を行っている状態の両方がある場合
のいずれをも含む広い概念である。
【００１２】
また、本願発明（請求項１）の生物脱臭方法においては、被処理ガスの種類により種々の微生物を用いることが可能であるが、主要な有効微生物が好気性、嫌気性のいずれであるか、あるいは従属栄養性、独立栄養性のいずれかなどにより、適切な担体を選ぶことが望ましく、また、必要に応じて、栄養分の供給などを行うことが望ましい。
【００１３】
また、本願発明では、洗浄が必要となった担体充填領域を、洗浄液により洗浄する洗浄工程に供する一方、洗浄工程に供されていない複数の担体充填領域のうち、最も先に洗浄工程に供された第１担体充填領域に、悪臭成分を最も高濃度に含有する被処理ガスを供給して１段目脱臭処理を行い、次に、第１担体充填領域の次に洗浄工程に供された第２担体充填領域に、第１担体充填領域で１段目脱臭処理が行われた被処理ガスを供給して２段目脱臭処理を行い、さらに、他の担体充填領域が存在する場合には、第２担体充填領域の次に洗浄工程に供された担体充填領域に、第２担体充填領域で２段目脱臭処理が行われた被処理ガスを供給して脱臭処理を行い、以後も、洗浄工程で洗浄が行われた直後の担体充填領域の１つ前の担体充填領域までは同様の順序で被処理ガスを供給して脱臭処理を行い、洗浄工程で洗浄が行われた直後の洗浄直後担体充填領域に、その１つ前の担体充填領域で脱臭処理が行われた被処理ガスを供給して、複数段式の脱臭処理のうち、悪臭成分を最も低濃度に含有する被処理ガスを処理する最終段脱臭処理を行うとともに、洗浄が必要となった時点で、１段目脱臭処理を行った第１段担体充填領域を洗浄工程に供し、以後同様にして、所定の担体充填領域を洗浄しながら脱臭操作を行うようにしているので、悪臭成分濃度の高いガスが導入される担体充填領域が、順次異なる担体充填領域に移ってゆくことになるため、各担体充填領域間における除去すべき悪臭成分の負荷に偏りが生じないようにして、長期間安定して、信頼性の高い生物脱臭を行うことができる。
【００１４】
また、請求項２の生物脱臭方法は、前記洗浄水として、塩化カルシウム、塩化アンモニウム、塩化マンガン、硫酸鉄、リン酸ナトリウム、リン酸水素二カリウム、リン酸二水素カリウム、硫酸マグネシウム、塩化マグネシウム、塩化コバルト、モリブデン酸ナトリウムからなる群より選ばれる少なくとも１種を栄養塩として含有する水を用いることを特徴としている。
【００１５】
洗浄水として、塩化カルシウム、塩化アンモニウム、塩化マンガン、硫酸鉄、リン酸ナトリウム、リン酸水素二カリウム、リン酸二水素カリウム、硫酸マグネシウム、塩化マグネシウム、塩化コバルト、モリブデン酸ナトリウムからなる群より選ばれる少なくとも１種を栄養塩として含有する水を用いることにより、担体充填領域の洗浄を行うと同時に、微生物に栄養分を供給することが可能になり、本願発明をさらに実効あらしめることが可能になる。
【００１６】
また、本願発明（請求項３）の生物脱臭装置は、
請求項１または２記載の生物脱臭方法を実施するために用いられる生物脱臭装置であって、
微生物を担持させた担体が充填され、脱臭操作時には被処理ガスを通過させ、洗浄操作時には洗浄水を溜めることができるように構成された複数の担体充填領域と、
所定の担体充填領域を洗浄する洗浄操作時に、該担体充填領域に洗浄水を供給して、該担体充填領域内の担体を洗浄水に浸漬させた後、洗浄水を抜き出すことができるように構成された洗浄水供給・排出機構と、
被処理ガスの供給経路を切り換えて、少なくとも洗浄操作が行われている担体充填領域を除いた複数の担体充填領域に、所定の経路で被処理ガスを通過させることができるように構成された被処理ガス経路切り換え機構と
を具備することを特徴としている。
【００１７】
本願発明（請求項３）の生物脱臭装置は、上述のように、複数の担体充填領域と、所定の担体充填領域を洗浄する洗浄操作時に、該担体充填領域に洗浄水を供給して、担体を洗浄水に浸漬させた後、洗浄水を抜き出すことができるように構成された洗浄水供給・排出機構と、被処理ガスの供給経路を切り換えて、少なくとも洗浄操作が行われている担体充填領域を除いた複数の担体充填領域に、所定の経路で被処理ガスを通過させることができるように構成された被処理ガス経路切り換え機構とを備えているので、本願発明（請求項１および２）の生物脱臭方法を確実に実施して、効率よく、信頼性の高い生物脱臭処理を行うことが可能になる。
【００１８】
また、請求項４の生物脱臭装置は、前記被処理ガス経路切り換え機構が、各担体充填領域に接続されたガス配管と、前記ガス配管の所定の位置に配設されて所定のガス配管を開閉するバルブとを備えてなるものであることを特徴としている。
【００１９】
被処理ガス経路切り換え機構を、各担体充填領域に接続されたガス配管と、ガス配管の所定の位置に配設されて所定のガス配管を開閉するバルブとを備えた構成とすることにより、構造の複雑化、コストの大幅な増大を招いたりすることなく、被処理ガスの経路を任意、かつ確実に切り換えることが可能になる。
【００２０】
また、請求項５の生物脱臭装置は、前記洗浄水として、塩化カルシウム、塩化アンモニウム、塩化マンガン、硫酸鉄、リン酸ナトリウム、リン酸水素二カリウム、リン酸二水素カリウム、硫酸マグネシウム、塩化マグネシウム、塩化コバルト、モリブデン酸ナトリウムからなる群より選ばれる少なくとも１種を栄養塩として含有する水が用いられるように構成されていることを特徴としている。
【００２１】
洗浄水として、塩化カルシウム、塩化アンモニウム、塩化マンガン、硫酸鉄、リン酸ナトリウム、リン酸水素二カリウム、リン酸二水素カリウム、硫酸マグネシウム、塩化マグネシウム、塩化コバルト、モリブデン酸ナトリウムからなる群より選ばれる少なくとも１種を栄養塩として含有する水が用いられるように構成されている場合、担体充填領域の洗浄を行うと同時に、微生物に栄養分を与えることが可能になり、本願発明をさらに実効あらしめることが可能になる。
【００２２】
【発明の実施の形態】
以下、本願発明の実施形態を示してその特徴とするところをさらに詳しく説明する。図１は本願発明の一実施形態にかかる生物脱臭装置の構成を示す概念図である。
この実施形態の生物脱臭装置は、微生物を担持させた担体２１が充填され、脱臭操作時には被処理ガスを通過させ、洗浄操作時には洗浄水を溜めることができるように構成された複数の担体充填領域２０ａ，２０ｂ，２０ｃ，２０ｄを備えた脱臭塔３０と、担体充填領域２０ａ，２０ｂ，２０ｃ，２０ｄのうちのいずれかを洗浄する洗浄操作時に、該担体充填領域に洗浄水を供給して、該担体充填領域内の担体２１を所定時間、洗浄水に浸漬させた後、洗浄水を抜き出すことができるように構成された洗浄水供給・排出機構４０と、被処理ガスの供給経路を切り換えて、少なくとも洗浄操作が行われていない複数の担体充填領域に、任意の経路で被処理ガスを通過させることができるように構成された被処理ガス経路切り換え機構５０とを備えている。
【００２３】
なお、洗浄水供給・排出機構４０は、給水バルブ３１ａ，３１ｂ，３１ｃ，３１ｄ，給水ノズル３２ａ，３２ｂ，３２ｃ，３２ｄ、排水バルブ３３ａ，３３ｂ，３３ｃ，３３ｄを備えた構成とされている。
【００２４】
また、被処理ガス経路切り換え機構５０は、配管、すなわち、被処理ガスを担体充填領域２０ａ，２０ｂ，２０ｃ，２０ｄに導くためのガス供給配管２２，被処理ガスを所定の経路で各担体充填領域２０ａ，２０ｂ，２０ｃ，２０ｄに供給するためのガス循環配管２３，２４及び脱臭処理された処理ガスを排出するための処理ガス排気配管２５と、ガス供給配管２２に配設されたバルブ１，２，３，４、ガス循環配管２３に配設されたバルブ５，６，７，８，９，１０、１１，１２、ガス循環配管２４に配設されたバルブ１３，１４、処理ガス排気配管２５に配設されたバルブ１５，１６，１７，１８，１９とを備えた構成とされている。
また、この実施形態では、洗浄液として、塩化アンモニウムを栄養塩として含有する洗浄液を用いている。
【００２５】
以下、この生物脱臭装置を用いて被処理ガスを生物脱臭処理する方法について説明する。
【００２６】
(１)この実施形態の生物脱臭装置において、各担体充填領域２０ａ，２０ｂ，２０ｃ，２０ｄのいずれもが使用可能である場合（すなわち、いずれの担体充填領域も洗浄していない場合）には、図２に示すように、
(ａ)ガス供給配管２２に配設されたバルブ１、ガス循環配管２３に配設されたバルブ５，６，７，８，９，１０、処理ガス排気配管２５に配設されたバルブ１８，１９を開とし、
(ｂ)ガス供給配管２２に配設されたバルブ２，３，４、ガス循環配管２３に配設されたバルブ１１，１２、ガス循環配管２４に配設されたバルブ１３，１４、処理ガス排気配管２５に配設されたバルブ１５，１６，１７を閉として、脱臭塔３０の塔底側から塔頂側に向かって担体充填領域２０ａ，２０ｂ，２０ｃ，２０ｄの順に被処理ガスを通過させることにより、被処理ガスの脱臭処理を行う。
【００２７】
(２)次に、最下段（１段目）の担体充填領域２０ａを洗浄する場合には、図３に示すように、
(ａ)ガス供給配管２２に配設されたバルブ２、ガス循環配管２３に配設されたバルブ７，８，９，１０、処理ガス排気配管２５に配設されたバルブ１８，１９を開とし、
(ｂ)ガス供給配管２２に配設されたバルブ１，３，４、ガス循環配管２３に配設されたバルブ５，６，１１，１２、ガス循環配管２４に配設されたバルブ１３，１４、処理ガス排気配管２５に配設されたバルブ１５，１６，１７を閉として、担体充填領域２０ｂ，２０ｃ，２０ｄの順に被処理ガスを通過させることにより、被処理ガスの脱臭処理を行うとともに、給水バルブ３１ａを開として、給水ノズル３２ａから１段目の担体充填領域２０ａに洗浄水（塩化アンモニウムを３重量％の割合で水に溶解させたもの）を供給して担体充填領域２０ａ内に溜め、担体２１を所定時間（この実施形態では２４時間）洗浄水に浸漬させた後、排水ノズル３３ａを開として、洗浄水を排出することにより、担体充填領域２０ａ内の担体２１を洗浄する。
【００２８】
(３)その後、２段目の担体充填領域２０ｂを洗浄する場合には、図４に示すように、
(ａ)ガス供給配管２２に配設されたバルブ３、ガス循環配管２３に配設されたバルブ９，１０、ガス循環配管２４に配設されたバルブ１３，１４、処理ガス排気配管２５に配設されたバルブ１５，１９を開とし、
(ｂ)ガス供給配管２２に配設されたバルブ１，２，４、ガス循環配管２３に配設されたバルブ５，６，７，８，１１，１２、処理ガス排気配管２５に配設されたバルブ１６，１７，１８を閉として、担体充填領域２０ｃ，２０ｄ，２０ａの順に被処理ガスを通過させることにより、被処理ガスの脱臭処理を行うとともに、給水バルブ３１ｂを開として、給水ノズル３２ｂから２段目の担体充填領域２０ｂに洗浄水（塩化アンモニウム水溶液）を供給して担体充填領域２０ｂ内に溜め、担体２１を所定時間（２４時間）洗浄水に浸漬させた後、排水ノズル３３ｂを開として、洗浄水を排出することにより、担体充填領域２０ｂ内の担体２１を洗浄する。
【００２９】
(４)さらに、３段目の担体充填領域２０ｃを洗浄する場合には、図５に示すように、
(ａ)ガス供給配管２２に配設されたバルブ４、ガス循環配管２３に配設されたバルブ５，６、ガス循環配管２４に配設されたバルブ１３，１４、処理ガス排気配管２５に配設されたバルブ１６，１９を開とし、
(ｂ)ガス供給配管２２に配設されたバルブ１，２，３、ガス循環配管２３に配設されたバルブ７，８，９，１０，１１，１２、処理ガス排気配管２５に配設されたバルブ１５，１７，１８を閉として、担体充填領域２０ｄ，２０ａ，２０ｂの順に被処理ガスを通過させることにより、被処理ガスの脱臭処理を行うとともに、給水バルブ３１ｃを開として、給水ノズル３２ｃから３段目の担体充填領域２０ｃに洗浄水（塩化アンモニウム水溶液）を供給して、３段目の担体充填領域２０ｃ内に溜め、担体２１を所定時間（２４時間）洗浄水に浸漬させた後、排水ノズル３３ｃを開として、洗浄水を排出することにより、担体充填領域２０ｃ内の担体２１を洗浄する。
【００３０】
(５)さらに、４段目の担体充填領域２０ｄを洗浄する場合には、図６に示すように、
(ａ)ガス供給配管２２に配設されたバルブ１、ガス循環配管２３に配設されたバルブ５，６，７，８、処理ガス排気配管２５に配設されたバルブ１７，１９を開とし、
(ｂ)ガス供給配管２２に配設されたバルブ２，３，４、ガス循環配管２３に配設されたバルブ９，１０，１１，１２、ガス循環配管２４に配設されたバルブ１３，１４、処理ガス排気配管２５に配設されたバルブ１５，１６，１８を閉として、脱臭塔３０の塔底側から塔頂側に向かって担体充填領域２０ａ，２０ｂ，２０ｃの順に被処理ガスを通過させることにより、被処理ガスの脱臭処理を行うとともに、給水バルブ３１ｄを開として、給水ノズル３２ｄから４段目の担体充填領域２０ｄに洗浄水（塩化アンモニウム水溶液）を供給して、４段目の担体充填領域２０ｄ内に溜め、担体２１を所定時間（２４時間）洗浄水に浸漬させた後、排水ノズル３３ｄを開として、洗浄水を排出することにより、担体充填領域２０ｄ内の担体２１を洗浄する。
【００３１】
そして、上記(１)〜(５)の工程を繰り返すことにより、担体充填領域を洗浄しながら脱臭操作を行うことが可能になり、長期間にわたって安定した運転を継続することが可能になる。
【００３２】
また、担体２１を洗浄水に所定時間浸漬させた後、洗浄水を抜き出すことにより各担体充填領域２０ａ，２０ｂ，２０ｃ，２０ｄ（の内部の担体２１）を洗浄するようにしているので、従来の、洗浄水をスプレーする洗浄方法を用いた場合のように洗浄水の通路が形成されてしまうことにより全体としての洗浄が不十分になるというようなことがなく、所定の担体充填領域を効率よくしかも確実に洗浄することが可能になる。
【００３３】
また、各担体充填領域２０ａ，２０ｂ，２０ｃ，２０ｄを洗浄する場合に、上述のような経路で、被処理ガスを、所定の担体充填領域（洗浄されていない担体充填領域）に供給するようにしているので、悪臭成分濃度の高いガスが導入される担体充填領域が、順次異なる担体充填領域に移ってゆくことになるため、各担体充填領域間における除去すべき悪臭成分の負荷に偏りが生じないようにして、長期間安定して、信頼性の高い生物脱臭を行うことができる。
【００３４】
また、洗浄水として、塩化アンモニウム水溶液を用いているので、担体充填領域の洗浄を行うと同時に、微生物に栄養分を与えることが可能になり、処理効率を高く維持することができる。
【００３５】
また、この実施形態では、被処理ガス経路切り換え機構５０を、各担体充填領域２０ａ，２０ｂ，２０ｃ，２０ｄに接続されたガス配管（すなわち、ガス供給配管２２、ガス循環配管２３，２４、処理ガス排気配管２５）とガス配管に配設されたバルブ（すなわち、ガス供給配管２２に配設されたバルブ１，２，３，４、ガス循環配管２３に配設されたバルブ５，６，７，８，９，１０、１１，１２、ガス循環配管２４に配設されたバルブ１３，１４、処理ガス排気配管２５に配設されたバルブ１５，１６，１７，１８，１９）とを備えた構成としているので、構造の複雑化や、設備コストの大幅な増大を招いたりすることなく、被処理ガスの供給経路を任意に切り換えることが可能になり、効率のよい生物脱臭を行うことができる。
【００３６】
なお、本願発明は上記実施形態に限定されるものではなく、担体充填領域の段数、洗浄水供給・排出機構や被処理ガス経路切り換え機構の具体的な構成、洗浄液の組成、被処理ガスの種類、担体充填領域の洗浄操作時に担体充填領域内の担体を洗浄水に浸漬させる時間などに関し、発明の範囲内において、種々の応用、変形を加えることが可能である。
【００３７】
【発明の効果】
上述のように、本願発明（請求項１）の生物脱臭方法は、各担体充填領域に所定の供給経路で被処理ガスを供給して脱臭操作を行いながら、所定の順序で各担体充填領域（担体を含む担体充填領域）を洗浄し、担体充填領域の洗浄操作時には、該担体充填領域への被処理ガスの供給を停止して洗浄水を供給し、該担体充填領域に洗浄水を溜めて担体を洗浄水に所定時間浸漬させた後、洗浄水を抜き出すことにより該担体充填領域の洗浄を行うとともに、被処理ガスを、洗浄の対象とされていない他の担体充填領域に所定の供給経路で供給して脱臭操作を行うようにしているので、担体充填領域を洗浄しながら、連続して脱臭操作を行うことが可能になる。
【００３８】
また、担体を洗浄水に所定時間浸漬させた後、洗浄水を抜き出すことにより担体充填領域を洗浄するようにしているので、従来の、洗浄水をスプレーする洗浄方法を用いた場合のように洗浄水の通路が形成されてしまうことにより全体としての洗浄が不十分になるというようなことがなく、所定の担体充填領域を効率よくしかも確実に洗浄することが可能になる。したがって、本願発明の生物脱臭方法によれば、長期間にわたって安定して、効率よく生物脱臭を行うことが可能になる。
【００３９】
また、本願発明では、所定時間が経過するごとに担体充填領域を、洗浄液により洗浄する洗浄工程に供する一方、洗浄工程に供されていない複数の担体充填領域のうち、最も先に洗浄工程に供された第１担体充填領域に、悪臭成分を最も高濃度に含有する被処理ガスを供給して１段目脱臭処理を行い、次に、第１担体充填領域の次に洗浄工程に供された第２担体充填領域に、第１担体充填領域で１段目脱臭処理が行われた被処理ガスを供給して２段目脱臭処理を行い、さらに、他の担体充填領域が存在する場合には、第２担体充填領域の次に洗浄工程に供された担体充填領域に、第２担体充填領域で２段目脱臭処理が行われた被処理ガスを供給して脱臭処理を行い、以後も、洗浄工程で洗浄が行われた直後の担体充填領域の１つ前の担体充填領域までは同様の順序で被処理ガスを供給して脱臭処理を行い、洗浄工程で洗浄が行われた直後の洗浄直後担体充填領域に、その１つ前の担体充填領域で脱臭処理が行われた被処理ガスを供給して、複数段式の脱臭処理のうち、悪臭成分を最も低濃度に含有する被処理ガスを処理する最終段脱臭処理を行うとともに、１段目脱臭処理を行った第１段担体充填領域を洗浄工程に供し、以後同様にして、所定の担体充填領域を洗浄しながら脱臭操作を行うようにしているので、悪臭成分濃度の高いガスが導入される担体充填領域が、順次異なる担体充填領域に移ってゆくことになるため、各担体充填領域間における除去すべき悪臭成分の負荷に偏りが生じないようにして、長期間安定して、信頼性の高い生物脱臭を行うことができる。
【００４０】
また、請求項２の生物脱臭方法のように、洗浄水として、塩化カルシウム、塩化アンモニウム、塩化マンガン、硫酸鉄、リン酸ナトリウム、リン酸水素二カリウム、リン酸二水素カリウム、硫酸マグネシウム、塩化マグネシウム、塩化コバルト、モリブデン酸ナトリウムからなる群より選ばれる少なくとも１種を栄養塩として含有する水を用いることにより、担体充填領域の洗浄を行うと同時に、微生物に栄養分を供給することが可能になり、本願発明をさらに実効あらしめることが可能になる。
【００４１】
また、本願発明（請求項３）の生物脱臭装置は、上述のように、複数の担体充填領域と、所定の担体充填領域を洗浄する洗浄操作時に、該担体充填領域に洗浄水を供給して、担体を洗浄水に浸漬させた後、洗浄水を抜き出すことができるように構成された洗浄水供給・排出機構と、被処理ガスの供給経路を切り換えて、少なくとも洗浄操作が行われている担体充填領域を除いた複数の担体充填領域に、所定の経路で被処理ガスを通過させることができるように構成された被処理ガス経路切り換え機構とを備えた構成を有しているので、本願発明（請求項１および２）の生物脱臭方法を確実に実施して、効率よく、信頼性の高い生物脱臭処理を行うことができる。
【００４２】
また、請求項４の生物脱臭装置のように、被処理ガス経路切り換え機構を、各担体充填領域に接続されたガス配管と、ガス配管の所定の位置に配設されて所定のガス配管を開閉するバルブとを備えた構成とした場合、構造の複雑化、コストの大幅な増大を招いたりすることなく、被処理ガスの経路を任意、かつ確実に切り換えることができる。
【００４３】
また、請求項５の生物脱臭装置のように、洗浄水として、塩化カルシウム、塩化アンモニウム、塩化マンガン、硫酸鉄、リン酸ナトリウム、リン酸水素二カリウム、リン酸二水素カリウム、硫酸マグネシウム、塩化マグネシウム、塩化コバルト、モリブデン酸ナトリウムからなる群より選ばれる少なくとも１種を栄養塩として含有する水が用いられるように構成されている場合、担体充填領域の洗浄を行うと同時に、微生物に栄養分を与えることが可能になり、本願発明をさらに実効あらしめることが可能になる。
【図面の簡単な説明】
【図１】 本願発明の一実施形態にかかる生物脱臭装置の構成を示す概念図である。
【図２】 本願発明の実施形態にかかる生物脱臭装置を用いて、被処理ガスがすべての担体充填領域を通過するような態様で生物脱臭を行う場合の被処理ガスの供給経路を示す図である。
【図３】 本願発明の実施形態にかかる生物脱臭装置を用いて、１段目の担体充填領域を洗浄しながら生物脱臭を行う場合の被処理ガスの供給経路を示す図である。
【図４】 本願発明の実施形態にかかる生物脱臭装置を用いて、２段目の担体充填領域を洗浄しながら生物脱臭を行う場合の被処理ガスの流れなどを示す図である。
【図５】 本願発明の実施形態にかかる生物脱臭装置を用いて、３段目の担体充填領域を洗浄しながら生物脱臭を行う場合の被処理ガスの供給経路を示す図である。
【図６】 本願発明の実施形態にかかる生物脱臭装置を用いて、４段目の担体充填領域を洗浄しながら生物脱臭を行う場合の被処理ガスの供給経路を示す図である。
【符号の説明】
１，２，３，４，５，６，７，８，９，１０、１１，１２，１３，１４、１５，１６，１７，１８，１９ バルブ
２０ａ １段目の担体充填領域
２０ｂ ２段目の担体充填領域
２０ｃ ３段目の担体充填領域
２０ｄ ４段目の担体充填領域
２１ 担体
２２ ガス供給配管
２３，２４ ガス循環配管
２５ 処理ガス排気配管
３０ 脱臭塔
３１ａ，３１ｂ，３１ｃ，３１ｄ 給水バルブ
３２ａ，３２ｂ，３２ｃ，３２ｄ 給水ノズル
３３ａ，３３ｂ，３３ｃ，３３ｄ 排水バルブ
４０ 洗浄水供給・排出機構
５０ 被処理ガス経路切り換え機構[0001]
BACKGROUND OF THE INVENTION
  TECHNICAL FIELD The present invention relates to a deodorizing method and a deodorizing apparatus using microorganisms, and more specifically, a biological deodorizing method and a living organism that perform deodorization by passing a gas to be treated containing malodorous components through a region filled with a carrier carrying microorganisms. It relates to a deodorizing device.
[0002]
[Prior art and problems to be solved by the invention]
  In recent years, as a deodorization technique for sewage treatment facilities, livestock industry, food processing industry, etc., a biological deodorization method that uses microorganisms to deodorize is becoming widespread, and has been used as a volatile organic compound (VOC). It is said that it is effective in removing the malodor originating from it.
[0003]
  By the way, in one of the conventional biological deodorization methods, microorganisms are loaded on a carrier such as soil, peat, compost, natural substances such as ceramics, inorganic substances typified by ceramics and various resins, and packed in a packed tower. There is a method of performing deodorization treatment by venting a gas to be treated from the lower part of the packed tower while sprinkling water from the upper part of the packed tower to maintain the activity of microorganisms.
[0004]
  However, in the packed tower type biological deodorization method, there is a problem in that it is difficult to stably operate for a long period of time because the carrier is easily clogged during operation and the pressure loss increases. This is because the growth of microorganisms becomes very active when malodors and VOCs are removed by the biological deodorization method, and the increased microorganisms and their metabolites cause clogging of the carrier.
[0005]
  Therefore, in order to solve the above problems, a method of washing the carrier with water or a chemical solution has been proposed and implemented. Usually, water is replenished and the carrier is sprayed by washing water or a chemical solution from above the carrier. The surface is cleaned.
  However, in the method of spraying cleaning water or chemical solution, a passage through which water or chemical solution passes is formed, and water or chemical solution passes through the same passage, so that the carrier cannot be washed sufficiently. It is.
[0006]
  In addition, in the conventional packed tower type biological deodorization method, for example, the gas to be treated is supplied from the bottom of the packed tower and discharged from the top of the tower. Therefore, there is a problem that the load on the deodorizing bacteria is biased and the efficiency is lowered.
[0007]
  The invention of the present application solves the above-mentioned problems, a biological deodorization method and a biological deodorization apparatus capable of efficiently cleaning the carrier-filled region, and capable of operating stably and efficiently over a long period of time. The purpose is to provide.
[0008]
[Means for Solving the Problems]
  In order to achieve the above object, the biological deodorization method of the present invention (Claim 1) comprises:
  (a) dividing a region filled with a carrier carrying microorganisms into a plurality of carrier filling regions;
  (b) Supplying the gas to be processed to each carrier filling region through a predetermined supply pathMultiple stagesWhile performing the deodorizing operation, wash each carrier filling area in a predetermined order,
  (c) During the cleaning operation for cleaning each carrier filling area, supply of the gas to be processed to the carrier filling area where cleaning is performed is stopped and cleaning water is supplied, and the cleaning water is stored in the carrier filling area to remove the carrier. After immersing in the cleaning water for a predetermined time, the cleaning water is extracted to clean the carrier filling region, and the gas to be treated is supplied to another carrier filling region not targeted for cleaning through a predetermined supply path. Supply deodorizing operation
  Biological deodorization method characterized byBecause
While the carrier-filled area that needs to be cleaned is subjected to a cleaning process in which it is cleaned with a cleaning liquid,
Among the plurality of carrier filling regions that have not been subjected to the cleaning process, the gas to be treated that contains the highest concentration of malodorous components is supplied to the first carrier filling region that has been first subjected to the cleaning step. Deodorizing treatment,
Next, a gas to be treated that has been subjected to the first-stage deodorization treatment in the first carrier filling region is supplied to the second carrier filling region that has been subjected to the cleaning process next to the first carrier filling region. Eye deodorization treatment,
Further, when another carrier filling region exists, the second carrier filling region subjected to the cleaning process after the second carrier filling region is subjected to the second stage deodorization treatment in the second carrier filling region. The process gas is supplied to perform the deodorization process, and thereafter, the gas to be processed is supplied in the same order up to the carrier filling area immediately before the carrier filling area immediately after the cleaning in the cleaning step. Process,
Supplying the gas to be treated that has been deodorized in the immediately preceding carrier filling region to the carrier filling region immediately after washing in the washing step, among the multi-stage deodorizing treatment, Perform final stage deodorization treatment to treat the gas to be treated containing the malodorous component at the lowest concentration,
Thereafter, when cleaning becomes necessary, the first-stage carrier-filled area subjected to the first-stage deodorization treatment is subjected to the washing step, and thereafter, the deodorizing operation is performed while washing the predetermined carrier-filled area. To do
  It is characterized by.
[0009]
  While performing a deodorizing operation by supplying a gas to be treated to each carrier filling area through a predetermined supply path, each carrier filling area (a carrier filling area including a carrier) is washed in a predetermined order. , By stopping the supply of the gas to be treated to the carrier filling region and supplying the cleaning water, storing the cleaning water in the carrier filling region, immersing the carrier in the cleaning water for a predetermined time, and then extracting the cleaning water. While cleaning the carrier filling area, the gas to be treated is supplied to another carrier filling area not targeted for cleaning through a predetermined supply path to perform a deodorizing operation, thereby cleaning the carrier filling area. It becomes possible to perform a deodorizing operation continuously.
[0010]
  In addition, since the carrier-filled region is washed by immersing the carrier in the washing water for a predetermined time and then withdrawing the washing water, the washing is performed as in the case of using the conventional washing method of spraying the washing water. Since the water passage is formed, the cleaning as a whole is not insufficient, and the predetermined carrier filling region can be efficiently and surely cleaned. Therefore, according to the biological deodorization method of the present invention, it is possible to stably perform biological deodorization stably over a long period of time.
[0011]
  In the present invention, “cleaning each carrier filling region in a predetermined order while supplying a gas to be treated to each carrier filling region through a predetermined supply path and performing a deodorizing operation”
  (1) always performing a deodorizing operation in another carrier filling region while washing any one or more of the plurality of carrier filling regions;
  (2) A state in which a deodorizing operation is performed in another carrier filling region while cleaning any one of the plurality of carrier filling regions, and all the carrier filling regions are not washed. When there is both deodorizing operation
  It is a broad concept including any of the above.
[0012]
  Moreover, in the biological deodorization method of the present invention (Claim 1), various microorganisms can be used depending on the type of gas to be treated, but whether the main effective microorganism is aerobic or anaerobic, Alternatively, it is desirable to select an appropriate carrier according to either heterotrophic or autotrophic properties, and it is desirable to supply nutrients as necessary.
[0013]
Further, in the present invention, the carrier filling area that needs to be washed is subjected to a washing process that is washed with a washing liquid, and among the plurality of carrier filling areas that are not subjected to the washing process, is provided to the washing process first. In addition, a gas to be treated containing the highest concentration of malodorous components is supplied to the first carrier filling region to perform the first-stage deodorization treatment, and then the first carrier filling region is subjected to a cleaning process. When the second carrier deodorizing process is performed by supplying the gas to be treated that has been subjected to the first stage deodorizing process in the first carrier filling area to the two carrier filling area, and when another carrier filling area exists, After the second carrier filling region is supplied to the carrier filling region subjected to the cleaning process, the gas to be treated that has been subjected to the second stage deodorizing treatment in the second carrier filling region is supplied to perform the deodorizing treatment. Up to the carrier filling area immediately before the carrier filling area immediately after cleaning in the process. The deodorizing treatment is performed by supplying the gas to be treated in the same order, and the deodorizing treatment is performed in the carrier filling region immediately after washing in the carrier filling region immediately after washing in the washing step. When the processing gas is supplied and the final stage deodorizing process for processing the gas to be processed containing the malodorous component at the lowest concentration is performed among the multistage deodorizing processes, and when cleaning is required, one stage The first-stage carrier filling area that has been subjected to the deodorizing treatment is subjected to a cleaning process, and thereafter, the deodorizing operation is performed while washing the predetermined carrier filling area, so that a gas with a high malodor component concentration is introduced. Since the carrier-filled areas to be moved to different carrier-filled areas in sequence, the load of malodorous components to be removed between the carrier-filled areas is not biased, and stable and reliable for a long period of time. Perform highly biological deodorization It can be.
[0014]
  Claims2The biological deodorization method of calcium chloride, ammonium chloride, manganese chloride, iron sulfate, sodium phosphate, dipotassium hydrogen phosphate, potassium dihydrogen phosphate, magnesium sulfate, magnesium chloride, cobalt chloride, molybdic acid It is characterized by using water containing at least one selected from the group consisting of sodium as a nutrient salt.
[0015]
  Washing water is selected from the group consisting of calcium chloride, ammonium chloride, manganese chloride, iron sulfate, sodium phosphate, dipotassium hydrogen phosphate, potassium dihydrogen phosphate, magnesium sulfate, magnesium chloride, cobalt chloride, sodium molybdate By using water containing at least one kind as a nutrient salt, it is possible to supply nutrients to microorganisms at the same time that the carrier-filled region is washed, and the present invention can be further improved.
[0016]
  The present invention (claims)3) Biological deodorization equipment
A biological deodorization device used for carrying out the biological deodorization method according to claim 1 or 2,
  A plurality of carrier filling regions configured to be filled with a carrier supporting microorganisms, pass a gas to be treated during a deodorizing operation, and store cleaning water during a cleaning operation;
  The cleaning water can be extracted after the cleaning water is supplied to the carrier filling region and the carrier in the carrier filling region is immersed in the cleaning water during the cleaning operation for cleaning the predetermined carrier filling region. Cleaning water supply / discharge mechanism,
  The gas to be processed is configured to pass through a predetermined path through a plurality of carrier filling areas excluding the carrier filling area where the cleaning operation is performed by switching the supply path of the gas to be treated. Process gas path switching mechanism and
  It is characterized by comprising.
[0017]
  The present invention (claims)3As described above, the biological deodorization apparatus) supplies the washing water to the carrier filling area and immerses the carrier in the washing water during the washing operation for washing the plurality of carrier filling areas and the predetermined carrier filling area. After that, a plurality of carriers excluding the carrier filling region where at least the cleaning operation is performed by switching the cleaning water supply / discharge mechanism configured to be able to extract the cleaning water and the supply path of the gas to be processed The present invention is provided with a gas flow path switching mechanism configured to allow a gas to be processed to pass through a predetermined path in the filling region.And 2It is possible to carry out the biological deodorization method) reliably and to perform an efficient and reliable biological deodorization treatment.
[0018]
  Claims4In the biological deodorization apparatus, the gas path switching mechanism to be treated includes a gas pipe connected to each carrier filling region, and a valve disposed at a predetermined position of the gas pipe to open and close the predetermined gas pipe. It is characterized by
[0019]
  Gas piping connected to each carrier filling area with gas path switching mechanismAndBy providing a valve that is disposed at a predetermined position of the gas pipe and opens and closes the predetermined gas pipe, the structure of the gas to be processed can be reduced without complicating the structure and significantly increasing the cost. The route can be arbitrarily and reliably switched.
[0020]
  Claims5The biological deodorization apparatus is composed of calcium chloride, ammonium chloride, manganese chloride, iron sulfate, sodium phosphate, dipotassium hydrogen phosphate, potassium dihydrogen phosphate, magnesium sulfate, magnesium chloride, cobalt chloride, molybdic acid. It is characterized in that water containing at least one selected from the group consisting of sodium as a nutrient salt is used.
[0021]
  Washing water is selected from the group consisting of calcium chloride, ammonium chloride, manganese chloride, iron sulfate, sodium phosphate, dipotassium hydrogen phosphate, potassium dihydrogen phosphate, magnesium sulfate, magnesium chloride, cobalt chloride, sodium molybdate In the case where water containing at least one kind as a nutrient salt is used, it is possible to provide nutrients to microorganisms at the same time that the carrier-filled region is washed, thereby further enhancing the present invention. Is possible.
[0022]
DETAILED DESCRIPTION OF THE INVENTION
  Hereinafter, embodiments of the present invention will be shown and the features thereof will be described in more detail. FIG. 1 is a conceptual diagram showing a configuration of a biological deodorization apparatus according to an embodiment of the present invention.
  The biological deodorization apparatus according to this embodiment is filled with a carrier 21 carrying microorganisms, allows a gas to be treated to pass through during a deodorizing operation, and stores a plurality of carrier filling regions so that cleaning water can be stored during a cleaning operation. During a cleaning operation for cleaning any one of the deodorizing tower 30 provided with 20a, 20b, 20c, and 20d and the carrier filling regions 20a, 20b, 20c, and 20d, cleaning water is supplied to the carrier filling region, After the carrier 21 in the carrier filling region is immersed in the cleaning water for a predetermined time, the cleaning water supply / discharge mechanism 40 configured to be able to extract the cleaning water and the supply path of the gas to be processed are switched, A processing gas path switching mechanism 50 configured to allow a processing gas to pass through at least a plurality of carrier filling regions where no cleaning operation is performed is provided. To have.
[0023]
  The cleaning water supply / discharge mechanism 40 includes water supply valves 31a, 31b, 31c, and 31d, water supply nozzles 32a, 32b, 32c, and 32d, and drain valves 33a, 33b, 33c, and 33d.
[0024]
  Further, the gas path switching mechanism 50 includes a pipe, that is, a gas supply pipe 22 for guiding the gas to be processed to the carrier filling areas 20a, 20b, 20c, and 20d, and a gas to be processed in a predetermined path. Gas circulation pipes 23 and 24 for supplying to 20a, 20b, 20c and 20d, a processing gas exhaust pipe 25 for discharging the deodorized processing gas, and valves 1 and 2 disposed in the gas supply pipe 22 , 3, 4, valves 5, 6, 7, 8, 9, 10, 11, 12 disposed in the gas circulation pipe 23, valves 13, 14 disposed in the gas circulation pipe 24, and processing gas exhaust pipe 25. It is set as the structure provided with the valve | bulb 15, 16, 17, 18, 19 arrange | positioned in this.
  In this embodiment, a cleaning liquid containing ammonium chloride as a nutrient salt is used as the cleaning liquid.
[0025]
  Hereinafter, a method for biologically deodorizing a gas to be treated using this biological deodorizing apparatus will be described.
[0026]
  (1) In the biological deodorization apparatus of this embodiment, when any of the carrier filling regions 20a, 20b, 20c, and 20d can be used (that is, when none of the carrier filling regions are washed) As shown in FIG.
  (a) Valve 1 provided in the gas supply pipe 22, valves 5, 6, 7, 8, 9, 10 provided in the gas circulation pipe 23, valve 18 provided in the processing gas exhaust pipe 25, 19 is open,
  (b) Valves 2, 3 and 4 disposed in the gas supply pipe 22, valves 11 and 12 disposed in the gas circulation pipe 23, valves 13 and 14 disposed in the gas circulation pipe 24, and processing gas exhaust The valves 15, 16, and 17 disposed in the pipe 25 are closed, and the gas to be treated is passed in the order of the carrier filling regions 20 a, 20 b, 20 c, and 20 d from the bottom side of the deodorizing tower 30 toward the top side. The deodorizing process of the gas to be processed is performed by
[0027]
  (2) Next, when cleaning the lowermost (first stage) carrier filling region 20a, as shown in FIG.
  (a) The valve 2 disposed in the gas supply pipe 22, the valves 7, 8, 9, 10 disposed in the gas circulation pipe 23, and the valves 18 and 19 disposed in the processing gas exhaust pipe 25 are opened. ,
  (b) Valves 1, 3, 4 disposed in the gas supply pipe 22, valves 5, 6, 11, 12 disposed in the gas circulation pipe 23, valves 13, 14 disposed in the gas circulation pipe 24 In addition, the valves 15, 16, and 17 disposed in the processing gas exhaust pipe 25 are closed, and the processing gas is passed in the order of the carrier filling regions 20 b, 20 c, and 20 d, thereby performing deodorizing processing of the processing gas, The water supply valve 31a is opened, and cleaning water (a solution in which ammonium chloride is dissolved in water at a rate of 3% by weight) is supplied from the water supply nozzle 32a to the first stage carrier filling region 20a and collected in the carrier filling region 20a. After the carrier 21 is immersed in the washing water for a predetermined time (24 hours in this embodiment), the drainage nozzle 33a is opened and the washing water is discharged to wash the carrier 21 in the carrier filling region 20a.
[0028]
  (3) Thereafter, when cleaning the second stage carrier filling region 20b, as shown in FIG.
  (a) Valves 3 and 10 provided in the gas supply pipe 22, valves 9 and 10 provided in the gas circulation pipe 23, valves 13 and 14 provided in the gas circulation pipe 24, and a processing gas exhaust pipe 25. Open the installed valves 15 and 19,
  (b) Valves 1, 2, 4 disposed in the gas supply pipe 22, valves 5, 6, 7, 8, 11, 12 disposed in the gas circulation pipe 23, and a processing gas exhaust pipe 25. The valves 16, 17, and 18 are closed, and the gas to be treated is passed through the carrier filling regions 20 c, 20 d, and 20 a in order to deodorize the gas to be treated, and the water supply valve 31 b is opened to supply the water nozzle 32 b Then, the cleaning water (ammonium chloride aqueous solution) is supplied to the second stage carrier filling area 20b and stored in the carrier filling area 20b, and the carrier 21 is immersed in the washing water for a predetermined time (24 hours). The carrier 21 in the carrier filling area 20b is washed by discharging the washing water.
[0029]
  (4) Further, when cleaning the third stage carrier filling region 20c, as shown in FIG.
  (a) Valve 4 disposed in the gas supply pipe 22, valves 5 and 6 disposed in the gas circulation pipe 23, valves 13 and 14 disposed in the gas circulation pipe 24, and a processing gas exhaust pipe 25 Open the valves 16 and 19 installed,
  (b) Valves 1, 2, 3 arranged in the gas supply pipe 22, valves 7, 8, 9, 10, 11, 12 arranged in the gas circulation pipe 23, and a processing gas exhaust pipe 25. The valves 15, 17, and 18 are closed, and the gas to be processed is passed through the carrier filling regions 20 d, 20 a, and 20 b in order, thereby deodorizing the gas to be processed, and the water supply valve 31 c is opened to supply the water nozzle 32 c After supplying washing water (ammonium chloride aqueous solution) to the third stage carrier filling area 20c and collecting it in the third stage carrier filling area 20c, the carrier 21 is immersed in the washing water for a predetermined time (24 hours). The carrier 21 in the carrier filling region 20c is washed by opening the drain nozzle 33c and discharging the washing water.
[0030]
  (5) Further, when cleaning the fourth stage carrier filling region 20d, as shown in FIG.
  (a) The valve 1 provided in the gas supply pipe 22, the valves 5, 6, 7, 8 provided in the gas circulation pipe 23 and the valves 17, 19 provided in the processing gas exhaust pipe 25 are opened. ,
  (b) Valves 2, 3, 4 disposed in the gas supply pipe 22, valves 9, 10, 11, 12 disposed in the gas circulation pipe 23, valves 13, 14 disposed in the gas circulation pipe 24 Then, the valves 15, 16, 18 provided in the processing gas exhaust pipe 25 are closed, and the gas to be processed passes in the order of the carrier filling regions 20 a, 20 b, 20 c from the tower bottom side to the tower top side of the deodorization tower 30. As a result, the gas to be treated is deodorized, the water supply valve 31d is opened, and cleaning water (ammonium chloride aqueous solution) is supplied from the water supply nozzle 32d to the fourth stage carrier filling region 20d. After collecting the carrier 21 in the carrier filling area 20d and immersing the carrier 21 in the washing water for a predetermined time (24 hours), the drain nozzle 33d is opened and the washing water is discharged to wash the carrier 21 in the carrier filling area 20d. That.
[0031]
  By repeating the steps (1) to (5), it is possible to perform a deodorizing operation while washing the carrier filling region, and it is possible to continue a stable operation over a long period of time.
[0032]
  Further, since the carrier 21 is immersed in the washing water for a predetermined time and then the washing water is extracted, each carrier filling region 20a, 20b, 20c, 20d (the inside carrier 21) is washed. The cleaning water passage is formed as in the case of using the cleaning method of spraying the cleaning water, so that the cleaning as a whole is not insufficient and the predetermined carrier filling region is efficiently formed. In addition, it is possible to perform cleaning reliably.
[0033]
  Further, when each of the carrier filling regions 20a, 20b, 20c, and 20d is washed, the gas to be treated is supplied to a predetermined carrier filling region (a carrier filling region that has not been washed) through the above-described route. Because it has a high concentration of malodorous componentsLedSince the carrier filling area to be moved will be sequentially moved to different carrier filling areas, so that the load of malodorous components to be removed between the carrier filling areas is not biased, stable for a long period of time, Highly reliable biological deodorization can be performed.
[0034]
  Further, since the ammonium chloride aqueous solution is used as the washing water, it is possible to feed the microorganisms with nutrients at the same time as the washing of the carrier filling region, and to maintain high processing efficiency.
[0035]
  Further, in this embodiment, the gas path switching mechanism 50 to be processed is provided with gas pipes connected to the carrier filling regions 20a, 20b, 20c, and 20d (that is, the gas supply pipe 22, the gas circulation pipes 23 and 24, the processing gas). Exhaust pipe 25) and valves provided in the gas pipe (that is, valves 1, 2, 3, 4 provided in the gas supply pipe 22 and valves 5, 6, 7, provided in the gas circulation pipe 23) 8, 9, 10, 11, 12, valves 13, 14 disposed in the gas circulation pipe 24, and valves 15, 16, 17, 18, 19) disposed in the processing gas exhaust pipe 25. Therefore, it becomes possible to arbitrarily switch the supply path of the gas to be processed without complicating the structure and causing a significant increase in equipment cost, and efficient biological deodorization can be performed.
[0036]
  The invention of the present application is not limited to the above embodiment, and the number of stages of the carrier filling region, the specific configuration of the cleaning water supply / discharge mechanism and the processing gas path switching mechanism, the composition of the cleaning liquid, and the type of the processing gas Further, various applications and modifications can be added within the scope of the present invention with respect to the time for immersing the carrier in the carrier filling region in the washing water during the washing operation of the carrier filling region.
[0037]
【The invention's effect】
  As described above, in the biological deodorization method of the present invention (Claim 1), each carrier filling region (in a predetermined order) while supplying a gas to be treated to each carrier filling region through a predetermined supply path and performing a deodorizing operation. The carrier-filling region including the carrier is washed, and during the cleaning operation of the carrier-filling region, the supply of the gas to be treated to the carrier-filling region is stopped and cleaning water is supplied, and the cleaning water is stored in the carrier-filling region. After the carrier is immersed in the cleaning water for a predetermined time, the carrier filling region is cleaned by extracting the cleaning water, and the gas to be treated is supplied to another carrier filling region that is not the target of cleaning in a predetermined supply path. Therefore, the deodorizing operation can be continuously performed while cleaning the carrier filling region.
[0038]
  In addition, since the carrier-filled region is washed by immersing the carrier in the washing water for a predetermined time and then withdrawing the washing water, the washing is performed as in the case of using the conventional washing method of spraying the washing water. Since the water passage is formed, the cleaning as a whole is not insufficient, and the predetermined carrier filling region can be efficiently and surely cleaned. Therefore, according to the biological deodorization method of the present invention, it is possible to stably perform biological deodorization stably over a long period of time.
[0039]
In the invention of the present application, the carrier filling region is used for the cleaning step of cleaning with the cleaning liquid every time a predetermined time elapses, and among the plurality of carrier filling regions that are not used for the cleaning step, the carrier filling region is provided first. The first carrier filling region was supplied with a gas to be treated containing the highest concentration of malodorous components to perform the first-stage deodorization treatment, and then subjected to the cleaning step next to the first carrier filling region. When the second stage deodorizing process is performed by supplying the gas to be treated that has been subjected to the first stage deodorizing process in the first carrier filling area to the second carrier filling area, and there is another carrier filling area Then, after the second carrier filling region is supplied to the carrier filling region subjected to the cleaning process, the gas subjected to the second stage deodorization treatment in the second carrier filling region is supplied to perform the deodorization treatment. The carrier filling immediately before the carrier filling area immediately after the washing is performed in the washing process The gas to be treated is supplied in the same order up to the zone to perform the deodorization process, and the deodorization process is performed in the carrier filling area immediately before the washing immediately after the washing in the washing process. The first stage deodorization treatment was performed while the last stage deodorization treatment was performed to treat the treatment gas containing the malodorous component at the lowest concentration among the multistage deodorization treatment. Since the first stage carrier filling region is subjected to the cleaning process, and thereafter the deodorizing operation is performed while washing the predetermined carrier filling region, the carrier filling region into which the gas having a high malodor component concentration is introduced, Since it will move to different carrier filling regions one after another, stable and reliable biological deodorization will be performed for a long period of time without causing a bias in the load of malodorous components to be removed between the carrier filling regions. be able to.
[0040]
  Claims2Like the biological deodorization method, calcium chloride, ammonium chloride, manganese chloride, iron sulfate, sodium phosphate, dipotassium hydrogen phosphate, potassium dihydrogen phosphate, magnesium sulfate, magnesium chloride, cobalt chloride, molybdenum By using water containing at least one selected from the group consisting of sodium acid as a nutrient salt, it becomes possible to supply nutrients to the microorganisms at the same time as cleaning the carrier-filled region, and the present invention is further effective. It becomes possible to storm.
[0041]
  The present invention (claims)3As described above, the biological deodorization apparatus) supplies the washing water to the carrier filling area and immerses the carrier in the washing water during the washing operation for washing the plurality of carrier filling areas and the predetermined carrier filling area. After that, a plurality of carriers excluding the carrier filling region where at least the cleaning operation is performed by switching the cleaning water supply / discharge mechanism configured to be able to extract the cleaning water and the supply path of the gas to be processed Since the filling region has a structure including a processing gas path switching mechanism configured to allow the processing gas to pass through a predetermined path, the present invention (Claim 1).And 2The biological deodorization method (1) can be carried out reliably, and an efficient and reliable biological deodorization treatment can be performed.
[0042]
  Claims4As in the case of the biological deodorization apparatus, the gas path switching mechanism to be treated is connected to the gas pipe connected to each carrier filling region.,In the case of a configuration provided with a valve disposed at a predetermined position of the gas pipe for opening and closing the predetermined gas pipe, the route of the gas to be processed without incurring a complicated structure and a significant increase in cost. Can be switched arbitrarily and reliably.
[0043]
  Claims5Like biological deodorization equipment, as washing water, calcium chloride, ammonium chloride, manganese chloride, iron sulfate, sodium phosphate, dipotassium hydrogen phosphate, potassium dihydrogen phosphate, magnesium sulfate, magnesium chloride, cobalt chloride, molybdenum When configured to use water containing at least one selected from the group consisting of sodium acid as a nutrient salt, it becomes possible to provide nutrients to microorganisms at the same time as washing the carrier-filled region, The present invention can be further effectively realized.
[Brief description of the drawings]
FIG. 1 is a conceptual diagram showing a configuration of a biological deodorization apparatus according to an embodiment of the present invention.
FIG. 2 is a diagram showing a supply path of a gas to be treated when biological deodorization is performed in such a manner that the gas to be treated passes through all the carrier-filled regions using the biological deodorization apparatus according to the embodiment of the present invention. is there.
FIG. 3 is a diagram showing a supply path of a gas to be treated when biological deodorization is performed while cleaning a first stage carrier filling region using the biological deodorization apparatus according to the embodiment of the present invention.
FIG. 4 is a diagram showing a flow of a gas to be treated when biological deodorization is performed while cleaning a second stage carrier filling region using the biological deodorization apparatus according to the embodiment of the present invention.
FIG. 5 is a diagram showing a supply path of a gas to be treated when biological deodorization is performed while cleaning the third-stage carrier filling region using the biological deodorization apparatus according to the embodiment of the present invention.
FIG. 6 is a diagram showing a supply path of a gas to be treated when biological deodorization is performed while cleaning a fourth stage carrier filling region using the biological deodorization apparatus according to the embodiment of the present invention.
[Explanation of symbols]
  1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19 Valve
  20a First stage carrier filling area
  20b Second stage carrier filling region
  20c Third stage carrier filling area
  20d Fourth stage carrier filling area
  21 Carrier
  22 Gas supply piping
  23, 24 Gas circulation piping
  25 Processing gas exhaust piping
  30 Deodorization tower
  31a, 31b, 31c, 31d Water supply valve
  32a, 32b, 32c, 32d Water supply nozzle
  33a, 33b, 33c, 33d Drain valve
  40 Washing water supply / discharge mechanism
  50 Processed gas path switching mechanism

Claims (5)

(ａ)微生物を担持させた担体を充填した領域を複数の担体充填領域に分割し、
(ｂ)各担体充填領域に所定の供給経路で被処理ガスを供給して複数段式に脱臭操作を行いながら、所定の順序で各担体充填領域を洗浄し、
(ｃ)各担体充填領域を洗浄する洗浄操作時には、洗浄が行われる担体充填領域への被処理ガスの供給を停止して洗浄水を供給し、該担体充填領域に洗浄水を溜めて担体を洗浄水に所定時間浸漬させた後、洗浄水を抜き出すことにより、該担体充填領域の洗浄を行うとともに、被処理ガスを、洗浄の対象とされていない他の担体充填領域に所定の供給経路で供給して脱臭操作を行うこと
を特徴とする生物脱臭方法であって、
洗浄が必要となった所定の担体充填領域を、洗浄液により洗浄する洗浄工程に供する一方、
洗浄工程に供されていない複数の担体充填領域のうち、最も先に洗浄工程に供された第１担体充填領域に、悪臭成分を最も高濃度に含有する被処理ガスを供給して１段目脱臭処理を行い、
次に、前記第１担体充填領域の次に洗浄工程に供された第２担体充填領域に、前記第１担体充填領域で１段目脱臭処理が行われた被処理ガスを供給して２段目脱臭処理を行い、
さらに、他の担体充填領域が存在する場合には、第２担体充填領域の次に洗浄工程に供された担体充填領域に、前記第２担体充填領域で２段目脱臭処理が行われた被処理ガスを供給して脱臭処理を行い、以後も、前記洗浄工程で洗浄が行われた直後の担体充填領域の１つ前の担体充填領域までは同様の順序で被処理ガスを供給して脱臭処理を行い、
前記洗浄工程で洗浄が行われた直後の洗浄直後担体充填領域に、その１つ前の担体充填領域で脱臭処理が行われた被処理ガスを供給して、複数段式の脱臭処理のうち、悪臭成分を最も低濃度に含有する被処理ガスを処理する最終段脱臭処理を行い、
その後、洗浄が必要となった時点で、前記１段目脱臭処理を行った第１段担体充填領域を前記洗浄工程に供し、以後同様にして、所定の担体充填領域を洗浄しながら脱臭操作を行うこと
を特徴とする生物脱臭方法。 (a) dividing a region filled with a carrier carrying microorganisms into a plurality of carrier filling regions;
(b) cleaning each carrier filling area in a predetermined order while supplying a gas to be treated to each carrier filling area through a predetermined supply path and performing a deodorizing operation in a plurality of stages ;
(c) During the cleaning operation for cleaning each carrier filling area, supply of the gas to be processed to the carrier filling area where cleaning is performed is stopped and cleaning water is supplied, and the cleaning water is stored in the carrier filling area to remove the carrier. After immersing in the cleaning water for a predetermined time, the cleaning water is extracted to clean the carrier filling region, and the gas to be treated is supplied to another carrier filling region not targeted for cleaning through a predetermined supply path. A biological deodorization method characterized by supplying and performing a deodorization operation ,
While the predetermined carrier-filled area that needs to be cleaned is subjected to a cleaning process of cleaning with a cleaning liquid,
Among the plurality of carrier filling regions that have not been subjected to the cleaning process, the gas to be treated that contains the highest concentration of malodorous components is supplied to the first carrier filling region that has been first subjected to the cleaning step. Deodorizing treatment,
Next, a gas to be treated that has been subjected to the first-stage deodorization treatment in the first carrier filling region is supplied to the second carrier filling region that has been subjected to the cleaning process next to the first carrier filling region. Eye deodorization treatment,
Further, when another carrier filling region exists, the second carrier filling region subjected to the cleaning process after the second carrier filling region is subjected to the second stage deodorization treatment in the second carrier filling region. The process gas is supplied to perform the deodorization process, and thereafter, the gas to be processed is supplied in the same order up to the carrier filling area immediately before the carrier filling area immediately after the cleaning in the cleaning step. Process,
Supplying the gas to be treated that has been deodorized in the immediately preceding carrier filling region to the carrier filling region immediately after washing in the washing step, among the multi-stage deodorizing treatment, Perform final stage deodorization treatment to treat the gas to be treated containing the malodorous component at the lowest concentration,
Thereafter, when cleaning becomes necessary, the first-stage carrier-filled area subjected to the first-stage deodorization treatment is subjected to the washing step, and thereafter, the deodorizing operation is performed while washing the predetermined carrier-filled area. To do
Biological deodorization method characterized by. 前記洗浄水として、塩化カルシウム、塩化アンモニウム、塩化マンガン、硫酸鉄、リン酸ナトリウム、リン酸水素二カリウム、リン酸二水素カリウム、硫酸マグネシウム、塩化マグネシウム、塩化コバルト、モリブデン酸ナトリウムからなる群より選ばれる少なくとも１種を栄養塩として含有する水を用いることを特徴とする請求項１記載の生物脱臭方法。  The washing water is selected from the group consisting of calcium chloride, ammonium chloride, manganese chloride, iron sulfate, sodium phosphate, dipotassium hydrogen phosphate, potassium dihydrogen phosphate, magnesium sulfate, magnesium chloride, cobalt chloride, sodium molybdate. The method according to claim 1, wherein water containing at least one selected from the group consisting of nutrients is used. 請求項１または２記載の生物脱臭方法を実施するために用いられる生物脱臭装置であって、
微生物を担持させた担体が充填され、脱臭操作時には被処理ガスを通過させ、洗浄操作時には洗浄水を溜めることができるように構成された複数の担体充填領域と、
所定の担体充填領域を洗浄する洗浄操作時に、該担体充填領域に洗浄水を供給して、該担体充填領域内の担体を洗浄水に浸漬させた後、洗浄水を抜き出すことができるように構成された洗浄水供給・排出機構と、
被処理ガスの供給経路を切り換えて、少なくとも洗浄操作が行われている担体充填領域を除いた複数の担体充填領域に、所定の経路で被処理ガスを通過させることができるように構成された被処理ガス経路切り換え機構と
を具備することを特徴とする生物脱臭装置。 A biological deodorization device used for carrying out the biological deodorization method according to claim 1 or 2,
A plurality of carrier filling regions configured to be filled with a carrier supporting microorganisms, pass a gas to be treated during a deodorizing operation, and store cleaning water during a cleaning operation;
The cleaning water can be extracted after the cleaning water is supplied to the carrier filling region and the carrier in the carrier filling region is immersed in the cleaning water during the cleaning operation for cleaning the predetermined carrier filling region. Cleaning water supply / discharge mechanism,
The gas to be processed is configured to pass through a predetermined path through a plurality of carrier filling areas excluding the carrier filling area where the cleaning operation is performed by switching the supply path of the gas to be treated. A biological deodorization device comprising a processing gas path switching mechanism. 前記被処理ガス経路切り換え機構が、各担体充填領域に接続されたガス配管と、前記ガス配管の所定の位置に配設されて所定のガス配管を開閉するバルブとを備えてなるものであることを特徴とする請求項３記載の生物脱臭装置。The to-be-treated gas path switching mechanism includes a gas pipe connected to each carrier filling region, and a valve disposed at a predetermined position of the gas pipe to open and close the predetermined gas pipe. The biological deodorization apparatus according to claim 3 . 前記洗浄水として、塩化カルシウム、塩化アンモニウム、塩化マンガン、硫酸鉄、リン酸ナトリウム、リン酸水素二カリウム、リン酸二水素カリウム、硫酸マグネシウム、塩化マグネシウム、塩化コバルト、モリブデン酸ナトリウムからなる群より選ばれる少なくとも１種を栄養塩として含有する水が用いられるように構成されていることを特徴とする請求項３または４記載の生物脱臭装置。The washing water is selected from the group consisting of calcium chloride, ammonium chloride, manganese chloride, iron sulfate, sodium phosphate, dipotassium hydrogen phosphate, potassium dihydrogen phosphate, magnesium sulfate, magnesium chloride, cobalt chloride, sodium molybdate. The biological deodorizing apparatus according to claim 3 or 4, wherein water containing at least one selected from the group consisting of at least one selected from the group consisting of nutrients is used.
JP2002069953A 2002-03-14 2002-03-14 Biological deodorization method and biological deodorization apparatus Expired - Fee Related JP4037663B2 (en)

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