JPH0796286A - High-degree treatment of organic sewage - Google Patents
High-degree treatment of organic sewageInfo
- Publication number
- JPH0796286A JPH0796286A JP5241865A JP24186593A JPH0796286A JP H0796286 A JPH0796286 A JP H0796286A JP 5241865 A JP5241865 A JP 5241865A JP 24186593 A JP24186593 A JP 24186593A JP H0796286 A JPH0796286 A JP H0796286A
- Authority
- JP
- Japan
- Prior art keywords
- ozone
- treated water
- filter bed
- water
- biologically
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Landscapes
- Purification Treatments By Anaerobic Or Anaerobic And Aerobic Bacteria Or Animals (AREA)
- Treatment Of Water By Oxidation Or Reduction (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、し尿やごみ埋立浸出水
などの有機性汚水の高度処理法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for advanced treatment of organic wastewater such as human waste and landfill leachate.
【０００２】[0002]
【従来の技術】従来、し尿やごみ埋立浸出水など、有機
物を多く含む汚水は、活性汚泥法によって生物学的に処
理されている。このとき排出される活性汚泥処理水には
難生物分解性の有機物が高濃度に含まれているため、こ
のような難生物分解性有機物を除去するために活性炭吸
着処理が行われている。2. Description of the Related Art Conventionally, sewage containing a large amount of organic substances such as human waste and landfill leachate has been biologically treated by an activated sludge method. Since the activated sludge treated water discharged at this time contains a high concentration of hardly biodegradable organic substances, activated carbon adsorption treatment is performed to remove such hardly biodegradable organic substances.
【０００３】[0003]
【発明が解決しようとする課題】しかしながら、上記し
たようにして活性炭吸着によって難生物分解性有機物を
処理する場合、処理コストが高いという欠点がある。However, when the hardly biodegradable organic substance is treated by the activated carbon adsorption as described above, there is a drawback that the treatment cost is high.
【０００４】オゾンによって難生物分解性有機物を分解
除去する方法も研究されているが、この場合も処理コス
トが高くつくため現実には適用し難い。本発明は上記欠
点を解消するもので、し尿やごみ埋立浸出水の活性汚泥
処理水など、難生物分解性有機物を含む有機性汚水を経
済的かつ高度に処理できるようにすることを目的とする
ものである。Although a method of decomposing and removing hardly biodegradable organic substances by ozone has been studied, in this case as well, the treatment cost is high and it is difficult to apply in practice. The present invention solves the above-mentioned drawbacks, and an object thereof is to make it possible to economically and highly process organic wastewater containing hardly biodegradable organic matter, such as activated sludge treated water of human waste or landfill leachate. It is a thing.
【０００５】[0005]
【課題を解決するための手段】本発明は、原水をオゾン
反応槽へ供給して、原水中の有機物をオゾン酸化により
生物分解性有機物に変換し、この生物分解性有機物を含
む酸化処理水を嫌気性ろ床に導入して、嫌気的条件下で
生物学的に処理することを特徴とする。According to the present invention, raw water is supplied to an ozone reaction tank, organic matter in the raw water is converted into biodegradable organic matter by ozone oxidation, and oxidized water containing the biodegradable organic matter is treated. It is characterized by being introduced into an anaerobic filter bed and biologically treated under anaerobic conditions.
【０００６】また本発明は、嫌気性ろ床で処理した生物
学的処理水を好気性ろ床に導入して、生物学的処理水中
に残存する生物分解性有機物を好気的条件下で生物学的
に処理することを特徴とする。The present invention also introduces biologically treated water treated in an anaerobic filter bed into an aerobic filter bed to remove biodegradable organic matter remaining in the biologically treated water under aerobic conditions. It is characterized in that it is processed chemically.
【０００７】また本発明は、嫌気性ろ床で処理した生物
学的処理水または好気性ろ床で処理した生物学的処理水
をオゾン・過酸化水素反応槽に供給して、生物学的処理
水中に残存する有機物を過酸化水素の存在下でオゾン酸
化分解することを特徴とする。Further, the present invention provides a biological treatment by supplying biologically treated water treated by an anaerobic filter bed or biologically treated water treated by an aerobic filter bed to an ozone / hydrogen peroxide reaction tank. It is characterized in that organic matter remaining in water is decomposed by ozone oxidation in the presence of hydrogen peroxide.
【０００８】また本発明は、好気性ろ床で処理した生物
学的処理水の一部を嫌気性ろ床に返送して、生物学的処
理水中に残存する硝酸性窒素を嫌気的条件下で生物学的
に処理することを特徴とする。Further, according to the present invention, a part of the biologically treated water treated in the aerobic filter bed is returned to the anaerobic filter bed to remove the nitrate nitrogen remaining in the biologically treated water under anaerobic conditions. Characterized by biological treatment.
【０００９】さらに本発明は、オゾン反応槽から流出す
る酸化処理水に還元剤を添加することにより、嫌気性ろ
床への導入前に、酸化処理水中に残存する溶存酸素およ
び溶存オゾンを還元除去することを特徴とする。Further, according to the present invention, by adding a reducing agent to the oxidation treated water flowing out from the ozone reaction tank, the dissolved oxygen and the dissolved ozone remaining in the oxidation treated water are reduced and removed before being introduced into the anaerobic filter bed. It is characterized by doing.
【００１０】[0010]
【作用】有機物を含む被処理水をオゾン処理すると、有
機物の生物分解性が向上することは公知である。一方、
し尿や埋立浸出水の活性汚泥処理水などの場合、オゾン
酸化によって、それ以上オゾン分解されにくくかつその
他の有機物の分解の妨害となる脂肪族カルボン酸のよう
な成分が生成するとともに、アミン類を主体とする難生
物分解性有機物から硝酸性窒素化合物が生成することが
知られている。このことは、図１のし尿の活性汚泥処理
水のオゾン処理の結果を示したグラフにおいて、オゾン
の注入率（mg/l）が増大するにしたがって、生物分解性
有機物（ＢＯＤとして示す）および硝酸性窒素（ＮＯ3 -
−Ｎとして示す）の濃度（mg/l）が増大することからも
理解される。したがって、オゾン処理によって生成する
生物分解性有機物および硝酸性窒素を効率よく処理でき
るようにすることも重要な技術的課題である。It is known that the biodegradability of organic matter is improved by subjecting water to be treated containing organic matter to ozone treatment. on the other hand,
In the case of human waste and activated sludge treated water of landfill leachate, ozone oxidation produces components such as aliphatic carboxylic acids that are less likely to be decomposed by ozone and interfere with the decomposition of other organic substances, and also amines. It is known that nitrate nitrogen compounds are produced from the main biodegradable organic substances. In the graph showing the results of ozone treatment of the activated sludge treated water of night sewage in FIG. 1, as the ozone injection rate (mg / l) increases, biodegradable organic matter (shown as BOD) and nitric acid are shown. sex nitrogen (NO 3 -
It is also understood from the increase in the concentration (indicated as -N) (mg / l). Therefore, it is an important technical subject to enable efficient treatment of biodegradable organic substances and nitrate nitrogen produced by ozone treatment.
【００１１】上記本発明の構成によれば、原水中の難生
物分解性の有機物はオゾン反応槽においてオゾン酸化に
より生物分解性有機物および硝酸性窒素に変換され、こ
の生物分解性有機物と硝酸性窒素とが嫌気性ろ床におい
て微生物により分解・除去される。According to the above-mentioned constitution of the present invention, the hardly biodegradable organic matter in the raw water is converted into the biodegradable organic matter and nitrate nitrogen by ozone oxidation in the ozone reaction tank, and the biodegradable organic matter and nitrate nitrogen are produced. And are decomposed and removed by microorganisms in the anaerobic filter bed.
【００１２】また、嫌気性ろ床で処理した生物学的処理
水を好気性ろ床に導入することにより、この生物学的処
理水中に残存する生物分解性有機物は好気的条件下で生
物学的に分解される。Further, by introducing the biologically treated water treated by the anaerobic filter bed into the aerobic filter bed, the biodegradable organic matter remaining in the biologically treated water is biologically aerated under aerobic conditions. Will be decomposed.
【００１３】また、嫌気性ろ床で処理した生物学的処理
水または好気性ろ床で処理した生物学的処理水をオゾン
・過酸化水素反応槽に供給することにより、生物学的処
理水中に残存する有機物は過酸化水素の存在下でオゾン
酸化分解される。Further, by supplying the biologically treated water treated by the anaerobic filter bed or the biologically treated water treated by the aerobic filter bed to the ozone / hydrogen peroxide reaction tank, The remaining organic matter is decomposed by ozone oxidation in the presence of hydrogen peroxide.
【００１４】また、好気性ろ床で処理した生物学的処理
水の一部を嫌気性ろ床に返送することにより、この生物
学的処理水中に残存する硝酸性窒素は嫌気的条件下で生
物学的に脱窒される。Further, by returning a part of the biologically treated water treated in the aerobic filter bed to the anaerobic filter bed, the nitrate nitrogen remaining in the biologically treated water is biologically decomposed under anaerobic conditions. Is denitrified.
【００１５】また、オゾン反応槽から流出する酸化処理
水に還元剤を添加して、嫌気性ろ床への導入前に、酸化
処理水中に残存する溶存酸素および溶存オゾンを還元除
去することにより、嫌気性ろ床における嫌気的条件を確
保して、良好に生物学的処理を行うことができる。Further, a reducing agent is added to the oxidation treated water flowing out from the ozone reaction tank to reduce and remove the dissolved oxygen and dissolved ozone remaining in the oxidation treated water before introduction into the anaerobic filter bed. The anaerobic condition in the anaerobic filter bed can be secured, and the biological treatment can be favorably performed.
【００１６】[0016]
【実施例】以下、本発明の実施例を図面を参照しながら
説明する。図１は、本発明の有機性汚水の高度処理法が
行われる一実施例の汚水処理装置の全体構成を示した説
明図である。図１において、１はオゾン反応槽、２は嫌
気性ろ床、３は好気性ろ床、４はオゾン・過酸化水素反
応槽であり、この順に配列されている。Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is an explanatory diagram showing the overall configuration of a sewage treatment apparatus of one embodiment in which the advanced treatment method for organic sewage of the present invention is performed. In FIG. 1, 1 is an ozone reaction tank, 2 is an anaerobic filter bed, 3 is an aerobic filter bed, and 4 is an ozone / hydrogen peroxide reaction tank, which are arranged in this order.
【００１７】オゾン反応槽１は並流方式の反応槽であっ
て、槽の底部に原水供給管５と槽外のオゾン発生機６か
ら導かれたオゾン供給管７とが接続していて、槽底部か
ら原水とオゾンを供給して槽内を上昇させ、その間に両
者を混合して、オゾン酸化処理水を槽上部の酸化処理水
供給管８より流出させるようになっている。The ozone reaction tank 1 is a parallel flow type reaction tank, in which a raw water supply pipe 5 and an ozone supply pipe 7 led from an ozone generator 6 outside the tank are connected to the bottom of the tank. Raw water and ozone are supplied from the bottom to raise the inside of the tank, while the both are mixed, the ozone-oxidized water is discharged from the oxidation-treated water supply pipe 8 at the top of the tank.
【００１８】嫌気性ろ床２は、槽の内部にセラミックか
らなる多孔質材９を充填し、この多孔質材９に脱窒菌を
主体とする微生物を付着させることにより構成されてい
る。槽底部にはオゾン反応槽１からの酸化処理水供給管
８が接続していて、この酸化処理水供給管８により槽底
部からオゾン酸化処理水を供給し、多孔質材９の間を上
昇させる間にオゾン酸化処理水を脱窒菌に接触させて、
脱窒処理水を槽上部の脱窒処理水供給管１０より流出さ
せるようになっている。The anaerobic filter bed 2 is constructed by filling the inside of a tank with a porous material 9 made of ceramic, and adhering microorganisms mainly composed of denitrifying bacteria to this porous material 9. An oxidation treated water supply pipe 8 from the ozone reaction tank 1 is connected to the bottom of the tank, and the ozone oxidation treated water is supplied from the bottom of the tank by the oxidation treated water supply pipe 8 to raise the space between the porous materials 9. In the meantime, contact the ozone-oxidized water with the denitrifying bacteria,
The denitrification treated water is made to flow out from the denitrification treated water supply pipe 10 at the upper part of the tank.
【００１９】好気性ろ床３は、槽の内部にセラミックか
らなる多孔質材１１を充填して、この多孔質材１１に硝
化菌を主体とする微生物を付着させるとともに、槽底部
に槽外のブロワ１２から導かれた給気管１３が接続され
ることによって構成されている。槽底部にはまた、脱窒
処理水供給管１０が接続していて、この脱窒処理水供給
管１０により槽底部から脱窒処理水を流入させつつ給気
管１３より空気を供給し、両者を混合しながら多孔質材
１１の間を上昇させる間に、脱窒処理水を硝化菌に接触
させて、硝化処理水を槽外へ流出させるようになってい
る。槽上部における槽の外側には貯留槽１４が設けられ
るとともに、貯留槽１４に接続して硝化処理水供給管１
５が設けられていて、ろ床３から流入した硝化処理水を
一時貯留した後に硝化処理水供給管１５より流出させる
ようになっている。硝化処理水供給管１５の管路には分
岐して硝化処理水返送管１５ａが設けられていて、循環
ポンプ１５ｂを介装して嫌気性ろ床２の入口に接続して
いる。また、硝化処理水供給管１５の管路における硝化
処理水返送管１５ａの分岐点の下流側には、硝化処理水
に過酸化水素を混合する過酸化水素供給管１６が接続し
ている。The aerobic filter bed 3 is filled with a porous material 11 made of ceramic in the inside of the tank so that microorganisms mainly composed of nitrifying bacteria adhere to the porous material 11 and the outside of the tank is placed at the bottom of the tank. It is configured by connecting an air supply pipe 13 guided from the blower 12. The denitrification treated water supply pipe 10 is also connected to the bottom of the tank, and the denitrification treated water supply pipe 10 allows denitrification treated water to flow from the bottom of the tank while supplying air from the air supply pipe 13 to supply both of them. While the space between the porous materials 11 is raised while mixing, the denitrification treated water is brought into contact with the nitrifying bacteria so that the nitrification treated water flows out of the tank. A storage tank 14 is provided outside the tank at the upper part of the tank, and is connected to the storage tank 14 to supply the nitrification-treated water supply pipe 1
5 is provided so that the nitrification-treated water that has flowed in from the filter bed 3 is temporarily stored and then discharged from the nitrification-treated water supply pipe 15. The nitrification-treated water supply pipe 15 is branched into a nitrification-treated water return pipe 15a, and is connected to the inlet of the anaerobic filter 2 through a circulation pump 15b. Further, a hydrogen peroxide supply pipe 16 for mixing hydrogen peroxide into the nitrification treated water is connected to the nitrification treated water supply pipe 15 downstream of the branch point of the nitrification treated water return pipe 15a.
【００２０】オゾン・過酸化水素反応槽４は並流方式の
反応槽であって、槽底部に硝化処理水供給管１５とオゾ
ン発生機６から導かれたオゾン供給管１７とが接続して
いて、槽底部から硝化処理水とオゾンとを供給して槽内
を上昇させ、その間に両者を混合して、オゾン酸化され
た酸化処理水を槽上部の処理水排出管１８より流出させ
るようになっている。The ozone / hydrogen peroxide reaction tank 4 is a parallel flow type reaction tank, and a nitrification treated water supply pipe 15 and an ozone supply pipe 17 led from the ozone generator 6 are connected to the bottom of the tank. The nitrification-treated water and ozone are supplied from the bottom of the tank to raise the inside of the tank, and the both are mixed during this time so that the ozone-oxidized oxidation-treated water flows out from the treated-water discharge pipe 18 at the top of the tank. ing.
【００２１】上記構成により、オゾン反応槽１に原水お
よびオゾンを供給すると、原水とオゾンは底部から流入
して槽内を上昇する間に互いに混合され、原水中の難生
物分解性有機物はオゾン酸化されて生物分解性有機物お
よび硝酸性窒素に変換される。上で説明に用いた図１の
処理の場合、ＣＯＤ 150mg/lのし尿活性汚泥処理水をＣ
ＯＤ60mg/l程度までオゾン酸化したところ、ＢＯＤが50
mg/lとＮＯ3 -−Ｎが20mg/lまで生成した。このときグラ
フからわかるように、生物分解性有機物および硝酸性窒
素への変換は、ある程度進行した後はオゾンの注入量に
比例して行われないので、最大と予想される濃度の約８
〜９割程度のＢＯＤ濃度あるいはＮＯ3 -−Ｎ濃度が得ら
れた時点でオゾン酸化を終了する。オゾン酸化処理水
は、酸化処理水供給管８を通じて嫌気性ろ床２に送られ
る。With the above structure, when raw water and ozone are supplied to the ozone reaction tank 1, the raw water and ozone are mixed with each other while flowing from the bottom and rising in the tank, so that the biodegradable organic substances in the raw water are oxidized by ozone. It is converted to biodegradable organic matter and nitrate nitrogen. In the case of the treatment of FIG. 1 used in the above explanation, the COD 150 mg / l human waste activated sludge treated water was treated with C
Ozone oxidation up to about OD60mg / l resulted in a BOD of 50
mg / l and NO 3 - -N was generated until 20 mg / l. At this time, as can be seen from the graph, the conversion to biodegradable organic matter and nitrate nitrogen is not carried out in proportion to the injected amount of ozone after it has progressed to a certain extent, so the maximum expected concentration is about 8%.
To 9 percent about BOD concentration or NO 3 - ends the ozone oxidation when the -N concentration was obtained. The ozone-oxidized water is sent to the anaerobic filter bed 2 through the oxidation-treated water supply pipe 8.
【００２２】嫌気性ろ床２に送られたオゾン酸化処理水
は、槽底部から流入して多孔質材９の間を上昇する間に
多孔質材９に付着した脱窒菌と十分接触し、オゾン酸化
処理水中に含まれる生物分解性有機物および硝酸性窒素
は、それぞれ脱窒菌のための水素供与体および酸素源と
して利用され、ともに分解・除去される。脱窒反応のた
めの水素供与体が不足するときは、たとえばメタノール
を添加する。脱窒処理水は、脱窒処理水供給管１０を通
じて好気性ろ床３に送られる。The ozone-oxidized water sent to the anaerobic filter bed 2 flows from the bottom of the tank and ascends between the porous materials 9 while being in sufficient contact with the denitrifying bacteria adhering to the porous materials 9 to generate ozone. The biodegradable organic matter and nitrate nitrogen contained in the oxidized water are used as a hydrogen donor and an oxygen source for denitrifying bacteria, and are decomposed and removed together. When the hydrogen donor for the denitrification reaction is insufficient, for example, methanol is added. The denitrification treated water is sent to the aerobic filter bed 3 through the denitrification treated water supply pipe 10.
【００２３】好気性ろ床３に送られた脱窒処理水は、給
気管１３より供給される空気とともに槽底部から流入
し、多孔質材１１の間を上昇する間に空気中の酸素が混
合されつつ硝化菌と十分接触することになる。この結
果、脱窒処理水中に残存する生物分解性有機物、すなわ
ち主として嫌気性ろ床２において添加されたメタノール
は、好気的条件下で硝化菌により分解される。硝化処理
水は槽上端より貯留槽１４に流入して、微生物が沈降除
去された後に硝化処理水供給管１５へ流出する。硝化処
理水供給管１５へ流入した硝化処理水の一部は、循環ポ
ンプ１５ｂにより硝化処理水返送管１５ａを経て嫌気性
ろ床２の入口に返送され、硝化処理水中に含まれる硝酸
性窒素はろ床２内を上昇する間に生物学的に脱窒され
る。硝化処理水返送管１５ａへ流入した残りの硝化処理
水には、管路において過酸化水素供給管１６より過酸化
水素が供給される。The denitrification-treated water sent to the aerobic filter bed 3 flows in from the bottom of the tank together with the air supplied from the air supply pipe 13, and the oxygen in the air is mixed while rising between the porous materials 11. While being contacted, it is in sufficient contact with nitrifying bacteria. As a result, the biodegradable organic matter remaining in the denitrification-treated water, that is, methanol added mainly in the anaerobic filter bed 2 is decomposed by nitrifying bacteria under aerobic conditions. The nitrification-treated water flows into the storage tank 14 from the upper end of the tank, and after the microorganisms are settled and removed, the nitrification-treated water flows out to the nitrification-treated water supply pipe 15. A part of the nitrification-treated water that has flowed into the nitrification-treated water supply pipe 15 is returned to the inlet of the anaerobic filter bed 2 through the nitrification-treated water return pipe 15a by the circulation pump 15b, and the nitrate nitrogen contained in the nitrification-treated water is filtered. It is biologically denitrified as it rises in the bed 2. Hydrogen peroxide is supplied from the hydrogen peroxide supply pipe 16 to the remaining nitrification treated water that has flowed into the nitrification treated water return pipe 15a.
【００２４】オゾン・過酸化水素反応槽４に送られた硝
化処理水は、オゾン供給管１７より供給されるオゾンと
ともに槽底部から流入し、互いに混合されながら槽内を
上昇する。この間に、硝化処理水中に残存する難生物分
解性有機物は、過酸化水素の存在下でオゾン酸化分解さ
れる。The nitrification-treated water sent to the ozone / hydrogen peroxide reaction tank 4 flows in from the bottom of the tank together with ozone supplied from the ozone supply pipe 17, and rises in the tank while being mixed with each other. During this period, the hardly biodegradable organic matter remaining in the nitrification-treated water is oxidatively decomposed by ozone in the presence of hydrogen peroxide.
【００２５】このようにして、オゾン酸化分解と生物学
的処理とを組み合わせることによって、汚水中の難生物
分解性有機物等は高度にほぼ無機物まで分解され、この
ときのオゾン注入量は経済的な量となる。By combining ozone oxidative decomposition and biological treatment in this way, hardly biodegradable organic substances and the like in wastewater are highly decomposed to almost inorganic substances, and the ozone injection amount at this time is economical. It becomes the amount.
【００２６】嫌気性ろ床２における生物処理を良好に行
うには、オゾン反応槽１からの酸化処理水にＮａ2 ＳＯ
3 などの還元剤を添加して予め溶存酸素および溶存オゾ
ンを消失させておくことにより、嫌気的条件を確実にす
ればよい。In order to favorably perform biological treatment in the anaerobic filter bed 2, Na 2 SO is added to the oxidation treated water from the ozone reaction tank 1.
Anaerobic conditions may be ensured by adding a reducing agent such as 3 to eliminate dissolved oxygen and dissolved ozone in advance.
【００２７】オゾン反応槽１およびオゾン・過酸化水素
反応槽４は、上記のような並流方式または向流方式のい
ずれを用いてもよく、ろ床に充填される多孔質材はプラ
スチック製のものでもよい。The ozone reaction tank 1 and the ozone / hydrogen peroxide reaction tank 4 may use either the parallel flow method or the counter flow method as described above, and the porous material filled in the filter bed is made of plastic. It may be one.
【００２８】[0028]
【発明の効果】以上のように本発明によれば、原水中の
難生物分解性有機物等の有機物をオゾン酸化により生物
分解性有機物に変換し、この生物分解性有機物を嫌気的
条件下で生物学的に処理するという、オゾン酸化と生物
学的処理とを組み合わせて行う構成としたことにより、
経済的にオゾンを用いて難生物分解性有機物を含む汚水
を高度に処理することができる。As described above, according to the present invention, organic substances such as refractory biodegradable organic substances in raw water are converted into biodegradable organic substances by ozone oxidation, and the biodegradable organic substances are biodegradable under anaerobic conditions. By treating it biologically by combining ozone oxidation and biological treatment,
Economically, ozone can be used to highly treat sewage containing biodegradable organic matter.
【００２９】また、嫌気的条件下で処理した生物学的処
理水を好気的条件下で生物学的に分解することにより、
嫌気的処理において水素供与体として添加された有機物
など、生物学的処理水中に残存する生物分解性有機物が
確実に分解される。Further, by biologically decomposing biologically treated water treated under anaerobic conditions under aerobic conditions,
Biodegradable organic substances remaining in biologically treated water, such as organic substances added as hydrogen donors during anaerobic treatment, are reliably decomposed.
【００３０】また、嫌気的条件下で処理した生物学的処
理水または好気的条件下で処理した生物学的処理水を過
酸化水素の存在下でさらにオゾン酸化分解することによ
り、生物学的処理水中に残存する有機物が効率的に分解
される。Further, biologically treated water treated under anaerobic conditions or biologically treated water treated under aerobic conditions is further subjected to ozone oxidative decomposition in the presence of hydrogen peroxide, whereby biological treatment is carried out. Organic substances remaining in the treated water are efficiently decomposed.
【００３１】また、好気的条件下で処理した生物学的処
理水の一部を嫌気性ろ床に返送することによって、この
生物学的処理水中に残存する硝酸性窒素が嫌気的条件下
で生物学的に脱窒されるとともに、生物学的処理水は再
び下流の好気性ろ床やオゾン・過酸化水素反応槽に供給
されることになり、処理が確実になる。Further, by returning a part of the biologically treated water treated under aerobic conditions to the anaerobic filter bed, the nitrate nitrogen remaining in the biologically treated water is removed under anaerobic conditions. While being biologically denitrified, the biologically treated water will be supplied again to the downstream aerobic filter bed and ozone / hydrogen peroxide reaction tank, thus ensuring the treatment.
【００３２】さらに、酸化処理水中に残存する溶存酸素
および溶存オゾンを嫌気性ろ床への導入前に還元除去す
ることにより、嫌気性ろ床における嫌気的条件が確保さ
れ、良好に生物学的処理が行われる。Further, the dissolved oxygen and the dissolved ozone remaining in the oxidized water are reduced and removed before being introduced into the anaerobic filter bed, so that the anaerobic condition in the anaerobic filter bed is secured and the biological treatment is favorably performed. Is done.
【図１】本発明の有機性汚水の高度処理法が行われる一
実施例の汚水処理装置の全体構成を示した説明図であ
る。FIG. 1 is an explanatory diagram showing an overall configuration of a sewage treatment apparatus of an embodiment in which an advanced treatment method for organic sewage of the present invention is performed.
【図２】難生物分解性有機物のオゾン酸化分解を説明す
るグラフである。FIG. 2 is a graph for explaining ozone oxidative decomposition of hardly biodegradable organic matter.
１ オゾン反応槽 ２ 嫌気性ろ床 ３ 好気性ろ床 ４ オゾン・過酸化水素反応槽 1 Ozone reaction tank 2 Anaerobic filter bed 3 Aerobic filter bed 4 Ozone / hydrogen peroxide reaction tank
フロントページの続き (51)Int.Cl.6 識別記号 庁内整理番号 ＦＩ 技術表示箇所 Ｃ０２Ｆ 9/00 ５０２ Ｒ 7446−4Ｄ ５０３ Ｃ 7446−4Ｄ Continuation of front page (51) Int.Cl. 6 Identification number Office reference number FI technical display location C02F 9/00 502 R 7446-4D 503 C 7446-4D
Claims (5)
の有機物をオゾン酸化により生物分解性有機物に変換
し、この生物分解性有機物を含む酸化処理水を嫌気性ろ
床に導入して、嫌気的条件下で生物学的に処理すること
を特徴とする有機性汚水の高度処理法。1. Raw water is supplied to an ozone reaction tank, organic matter in raw water is converted into biodegradable organic matter by ozone oxidation, and oxidation treated water containing this biodegradable organic matter is introduced into an anaerobic filter bed. , Advanced treatment method of organic wastewater, which is characterized by biological treatment under anaerobic conditions.
好気性ろ床に導入して、生物学的処理水中に残存する生
物分解性有機物を好気的条件下で生物学的に処理するこ
とを特徴とする請求項１記載の有機性汚水の高度処理
法。2. The biologically treated water treated by the anaerobic filter bed is introduced into the aerobic filter bed so that the biodegradable organic matter remaining in the biologically treated water is biologically treated under aerobic conditions. The advanced treatment method for organic wastewater according to claim 1, wherein the advanced treatment method is an organic wastewater treatment method.
たは好気性ろ床で処理した生物学的処理水をオゾン・過
酸化水素反応槽に供給して、生物学的処理水中に残存す
る有機物を過酸化水素の存在下でオゾン酸化分解するこ
とを特徴とする請求項１または請求項２記載の有機性汚
水の高度処理法。3. A biologically treated water treated by an anaerobic filter bed or a biologically treated water treated by an aerobic filter bed is supplied to an ozone / hydrogen peroxide reaction tank and left in the biologically treated water. The method for advanced treatment of organic wastewater according to claim 1 or 2, wherein the organic matter is decomposed by ozone oxidation in the presence of hydrogen peroxide.
一部を嫌気性ろ床に返送して、生物学的処理水中に残存
する硝酸性窒素を嫌気的条件下で生物学的に処理するこ
とを特徴とする請求項２記載の有機性汚水の高度処理
法。4. A part of the biologically treated water treated by the aerobic filter bed is returned to the anaerobic filter bed to remove the nitrate nitrogen remaining in the biologically treated water under anaerobic conditions. The method for advanced treatment of organic wastewater according to claim 2, characterized in that
還元剤を添加することにより、嫌気性ろ床への導入前
に、酸化処理水中に残存する溶存酸素および溶存オゾン
を還元除去することを特徴とする請求項１〜請求項３の
いずれかに記載の有機性汚水の高度処理法。5. The dissolved oxygen and the dissolved ozone remaining in the oxidized water are reduced and removed before the introduction into the anaerobic filter bed by adding a reducing agent to the oxidized water flowing out from the ozone reaction tank. The advanced treatment method of the organic wastewater according to any one of claims 1 to 3, which is characterized.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5241865A JPH0796286A (en) | 1993-09-29 | 1993-09-29 | High-degree treatment of organic sewage |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5241865A JPH0796286A (en) | 1993-09-29 | 1993-09-29 | High-degree treatment of organic sewage |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0796286A true JPH0796286A (en) | 1995-04-11 |
Family
ID=17080679
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5241865A Pending JPH0796286A (en) | 1993-09-29 | 1993-09-29 | High-degree treatment of organic sewage |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0796286A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002336891A (en) * | 2001-05-17 | 2002-11-26 | Kurabo Ind Ltd | Decomposition system for hardly decomposable material |
| KR20030074966A (en) * | 2002-03-15 | 2003-09-22 | 주식회사 태영 | Process For Sludge Treatment Using Sludge Pretreatment And Membrane Bioreactor |
-
1993
- 1993-09-29 JP JP5241865A patent/JPH0796286A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002336891A (en) * | 2001-05-17 | 2002-11-26 | Kurabo Ind Ltd | Decomposition system for hardly decomposable material |
| KR20030074966A (en) * | 2002-03-15 | 2003-09-22 | 주식회사 태영 | Process For Sludge Treatment Using Sludge Pretreatment And Membrane Bioreactor |
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