JPH07222988A - Waste water treatment method - Google Patents

Waste water treatment method

Info

Publication number
JPH07222988A
JPH07222988A JP6042016A JP4201694A JPH07222988A JP H07222988 A JPH07222988 A JP H07222988A JP 6042016 A JP6042016 A JP 6042016A JP 4201694 A JP4201694 A JP 4201694A JP H07222988 A JPH07222988 A JP H07222988A
Authority
JP
Japan
Prior art keywords
filter medium
microorganisms
treatment
floating filter
floating
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
Application number
JP6042016A
Other languages
Japanese (ja)
Inventor
Yasushi Seo
泰史 瀬尾
Ayumi Yoshida
歩 吉田
Yoshikane Sugimoto
好謙 杉本
Ryoji Tanaka
良治 田中
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Ishigaki Mechanical Industry Co Ltd
Shikoku Chemicals Corp
Original Assignee
Ishigaki Mechanical Industry Co Ltd
Shikoku Chemicals Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Ishigaki Mechanical Industry Co Ltd, Shikoku Chemicals Corp filed Critical Ishigaki Mechanical Industry Co Ltd
Priority to JP6042016A priority Critical patent/JPH07222988A/en
Publication of JPH07222988A publication Critical patent/JPH07222988A/en
Pending legal-status Critical Current

Links

Classifications

    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W10/00—Technologies for wastewater treatment
    • Y02W10/10—Biological treatment of water, waste water, or sewage

Landscapes

  • Biological Treatment Of Waste Water (AREA)
  • Purification Treatments By Anaerobic Or Anaerobic And Aerobic Bacteria Or Animals (AREA)
  • Filtration Of Liquid (AREA)

Abstract

PURPOSE:To reduce remarkably the start up period of a treatment function to effect high level purification of waste water just from the start of waste water treatment and to keep always a high level of an oxidative decomposition function for contaminants in the waste water by using a floating filter medium on which highly concentrated microorganisms are fixed comprehensively in advance. CONSTITUTION:As microorganisms to be fixed comprehensively on a floating filter medium are used Pseudomonas sp. No. AESO 53 strain (Microorganisms Engineering Institute Fungus No.13230) having a function for decomposing surfactants and Acinetobactor sp. No. SK-0402A strain (Mcroorganisms Engineering Institute Fungus No.13232) having a good function for decomposing oil and fat. As a part of microorganisms to be fixed comprehensively, denitrifying bacteria such as Pseudomonas nitroreducens having a good function for converting nitrogen of nitric acid and nitrous acid types into nitrogen gas are used in such a way that the thickness of a microorganisms layer is 0.15mm or more.

Description

【発明の詳細な説明】Detailed Description of the Invention

【０００１】[0001]

【産業上の利用分野】この発明は、生活排水や産業排水
などの生物学的水質浄化に有効な汚水の処理方法に関す
るものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for treating sewage effective for biological water purification such as domestic wastewater and industrial wastewater.

【０００２】[0002]

【従来の技術】従来、生活排水や産業排水などの生物学
的水質浄化方法としては、活性汚泥処理、接触酸化処理
あるいは回転円盤処理などの処理方法が採用されている
が、これらの方法は処理施設に広大な敷地を要すること
から、その装置コストに大きな問題がある。この課題に
対して種々装置のコンパクト化あるいは単位面積当たり
の処理能力の向上などを目指した提案がなされている。2. Description of the Related Art Conventionally, treatment methods such as activated sludge treatment, catalytic oxidation treatment and rotary disc treatment have been adopted as biological water purification methods for domestic wastewater and industrial wastewater. Since the facility requires a vast site, there is a big problem in the equipment cost. For this problem, proposals have been made aiming at downsizing various devices or improving processing capacity per unit area.

【０００３】例えば、特公昭６３−８５号公報、特公平
２−２２６８２号公報、実開平５−３３８０８号公報な
どに示されている浮上濾材を用いた汚水の処理装置は、
密閉槽内に排水より比重が小さい浮上濾材を充填し、こ
の浮上濾材層に曝気を行いながら下部から汚水を送入
し、浮上濾材表面に自然発生的に形成された微生物膜の
働きによって、排水汚濁成分の酸化分解と並びに浮上濾
材による浮遊物質の除去がコンパクトな処理装置を用い
て為し得ることが知られている。For example, Japanese Patent Publication No. Sho 63-85, Japanese Examined Patent Publication No. 2-22682, and Japanese Utility Model Laid-Open No. 5-33808 discloses a wastewater treatment apparatus using a floating filter medium.
The airtight filter medium, which has a smaller specific gravity than the drainage, is filled in the closed tank, and the aeration is performed on this flotation filter medium to feed in the sewage from the lower part, and the microbial film spontaneously formed on the surface of the flotation filter causes the drainage. It is known that oxidative decomposition of pollutant components and removal of suspended solids by a floating filter medium can be performed using a compact processing device.

【０００４】[0004]

【発明が解決しようとする課題】しかしながら、前記の
浮上濾材を用いた汚水の処理によれば、排水処理を開始
した時点においては、濾材表面に排水汚濁成分の酸化分
解に必要な生物膜が形成されていないため、汚水の処理
機能が満足できるレベルに達する迄に１〜３週間の比較
的長い時間を要していた。However, according to the treatment of sewage using the above-mentioned floating filter medium, a biofilm necessary for the oxidative decomposition of wastewater pollutant components is formed on the surface of the filter medium at the start of wastewater treatment. Therefore, it took a relatively long time of 1 to 3 weeks until the sewage treatment function reached a satisfactory level.

【０００５】この種の装置においては、生物膜の過度の
成長あるいは濾別した浮遊物質の蓄積により、しばしば
濾材層の閉塞が起こるため、定期的に濾材の洗浄及び洗
浄液の排出を行うことを余儀なくされ、これらの作業に
よって浮上濾材表面に形成された生物膜の一部が剥離し
槽外に排出されるため、生物膜による排水汚濁成分の酸
化分解性能が、常時高いレベルに維持しえない難点があ
った。In this type of device, the filter medium layer is often clogged due to excessive growth of the biofilm or accumulation of filtered suspended matter, so that the filter medium must be regularly washed and the washing solution discharged. As a result, a part of the biofilm formed on the surface of the floating filter medium is peeled off and discharged to the outside of the tank by these operations, so the oxidative decomposition performance of wastewater pollutants by the biofilm cannot always be maintained at a high level. was there.

【０００６】また、排水汚濁成分の酸化分解を自然発生
的な微生物種に依存していたので、一般の処理方法と同
様に、生活排水や産業排水処理において問題とされる油
脂や界面活性剤など難分解性の汚濁物質の処理はほとん
ど行われていなかった。Further, since the oxidative decomposition of wastewater pollutants depends on naturally occurring microbial species, oil and fats and surfactants which are problematic in the treatment of domestic wastewater and industrial wastewater, etc., like the general treatment methods. Almost no treatment of persistent pollutants was performed.

【０００７】さらに、近年湖沼あるいは海域において富
栄養化汚濁が進行し、排水の窒素除去が社会的要請とし
て求められているが、従来の浮上濾材を用いた汚水の処
理装置によれば、生物学的脱窒の過程において、有機態
またアンモニア態窒素の硝化過程までは、自然発生的な
硝化細菌群の働きで比較的容易に進行するが、硝酸また
亜硝酸態窒素から窒素ガスに変換させる過程が至難であ
って、排水からの窒素除去はほとんど行われていない。Further, in recent years, eutrophication pollution has progressed in lakes and seas, and removal of nitrogen from wastewater is required as a social demand. According to the conventional wastewater treatment apparatus using a floating filter medium, biological treatment In the process of selective denitrification, the process of converting nitric acid or nitrite nitrogen to nitrogen gas is relatively easy to proceed up to the nitrification process of organic or ammonia nitrogen by the action of naturally occurring nitrifying bacteria. It is very difficult to remove nitrogen from wastewater.

【０００８】[0008]

【課題を解決するための手段】本発明方法は上述の浮上
濾材を用いた汚水の処理の問題点を解決するため、従来
の浮上濾材に予め微生物を高濃度に包括固定し、処理機
能の立ち上がりを大幅に短縮し、排水処理開始直後から
高いレベルの汚水浄化を行うとともに、濾材洗浄時にお
ける濾材表面の生物量の減少を防止し、排水汚濁成分の
酸化分解性能を常時高いレベルに維持したことを特徴と
する。In order to solve the problems of the treatment of wastewater using the above-mentioned flotation filter medium, the method of the present invention preliminarily fixes microorganisms to a high concentration in a conventional flotation filter medium to raise the treatment function. Drastically shortening the wastewater treatment, and performing a high level of sewage purification immediately after the start of wastewater treatment, preventing the decrease of the biomass of the filter medium surface during the cleaning of the filter medium, and maintaining the oxidative decomposition performance of the wastewater pollutant components at a high level at all times. Is characterized by.

【０００９】さらに本発明は、包括固定する微生物とし
て、界面活性剤に対して分解性能を示すシュードモナス
・エスピー(Pseudomonas sp.)NO.ＡＥＳ０５３株（微工
研菌寄第１３２３０号）〔特願平4-339792号〕、油脂に
対して優れた分解性能を示すアシネトバクター・エスピ
ー(Acinetobactor sp.)NO.ＳＫ−０４０２Ａ株（微工研
菌寄第１３２３２号）〔特願平4-339793号〕を採用し、
生活排水や産業排水処理で問題となる界面活性剤や油脂
など難分解性の汚濁成分の処理機能を高めるものであ
る。Further, the present invention provides a microorganism for immobilization, which is a Pseudomonas sp. NO. 4-339792], Acinetobactor sp. (Acinetobactor sp.) NO.SK-0402A strain (Microtechnology Research Institute, No. 13232) [Japanese Patent Application No. 4-339793] Adopted,
It enhances the function of treating persistent pollutants such as surfactants and oils and fats, which are problems in treating domestic and industrial wastewater.

【００１０】また包括固定する微生物の一部にシュード
モナス・ニトロレデューセンツ(Pseudomonas nitroredu
cens) など、硝酸また亜硝酸態窒素から窒素ガスに変換
する能力の優れた脱窒菌を用い、これらの浮上濾材表面
の包括固定化微生物層の厚みを０．１５mm以上として脱
窒菌による硝酸また亜硝酸態窒素の窒素ガスへの変換に
適した、溶存酸素の到達できない嫌気的環境を濾材表面
に設け、排水からの窒素除去性能を強化するものであ
る。[0010] In addition, Pseudomonas nitroredusents (Pseudomonas nitroredusentz
cens) such as nitric acid or nitrite nitrogen, which has an excellent ability to convert nitrogen gas into nitrogen gas, and the thickness of the entrapping immobilization microbial layer on the surface of these floating filter media is 0.15 mm or more. An anaerobic environment that is inaccessible to dissolved oxygen and suitable for conversion of nitrate nitrogen to nitrogen gas is provided on the surface of the filter medium to enhance the nitrogen removal performance from wastewater.

【００１１】本発明の実施において使用される浮上濾材
は、排水の比重より小さく、密閉槽内において浮上して
濾材層を形成し、且つ洗浄時の攪拌によって崩壊しない
ものでなければ、いずれの材質でも差し支えない。例え
ばポリエチレンやポリプロピレンなどに発泡剤を混練
し、発泡させながら押出し成形加工を行い、これを裁断
したもの、発泡スチロールやウレタンの成形物あるいは
粒状活性炭やケイソウ土などが好適なものとして挙げら
れる。浮上濾材の形状、大きさについては、濾材として
の基本的な濾過機能を満たすものであれば任意に選択で
きる。例えば直径０．５〜１０mmの球状、直径０．５〜
１０mm高さ０．５〜１０mmの円柱状、また同程度の大き
さの楕円状その他の非球状体、繊維物質を塊状あるいは
粒状に成型したものなどが採用できる。The floating filter medium used in the practice of the present invention is of any material as long as it is smaller than the specific gravity of drainage, floats in a closed tank to form a filter medium layer, and does not collapse by stirring during washing. But it doesn't matter. For example, preferable examples include those obtained by kneading a foaming agent with polyethylene, polypropylene or the like, performing extrusion molding while foaming and cutting the mixture, styrene foam or urethane molded products, granular activated carbon or diatomaceous earth. The shape and size of the floating filter medium can be arbitrarily selected as long as the basic filter function as a filter medium is satisfied. For example, spherical with a diameter of 0.5-10 mm, diameter of 0.5-
A cylindrical shape having a height of 10 mm and a height of 0.5 to 10 mm, an elliptic shape having the same size or other non-spherical body, and a material obtained by molding a fibrous material into a lump or a grain can be employed.

【００１２】包括固定する微生物は排水処理用として有
用なものであれば、いずれのものでも採用できる。例え
ば活性汚泥から分離した微生物を単独もしくは組み合わ
せて、また活性汚泥そのものを微生物群として用いるこ
とができる。排水中に汚濁成分として界面活性剤が存在
する場合には、前述の界面活性剤に対して分解性能を示
すシュードモナス・エスピー(Pseudomonas sp.)NO.ＡＥ
Ｓ０５３株（微工研菌寄第１３２３０号）、また排水中
の油脂濃度が高く、処理を行う上で問題となる場合に
は、油脂に対して優れた分解性能を示すアシネトバクタ
ー・エスピー(Acinetobactor sp.)NO.ＳＫ−０４０２Ａ
株（微工研菌寄第１３２３２号）の使用が好適であり、
またさらに排水からの窒素除去を改善する目的の場合に
は、シュードモナス・ニトロレデューセンツ(Pseudomon
as nitroreducens) やシュードモナス・デニトリフィカ
ンツ(Pseudomonas denitrificans) 、ミクロコッカス・
デニトリフィカンツ(Micrococcus denitrificans) 、デ
ニトロバチルス属(Denitrobacillus sp.) などの細菌群
が適している。As the microorganisms to be entrapped and fixed, any microorganisms can be adopted as long as they are useful for wastewater treatment. For example, the microorganisms separated from the activated sludge can be used alone or in combination, or the activated sludge itself can be used as the microorganism group. When a surfactant is present as a pollutant in the wastewater, Pseudomonas sp. NO.AE which shows decomposition performance against the above-mentioned surfactant.
S053 strain (Microtechnology Research Institute, No. 13230), and if the concentration of fats and oils in wastewater is a problem when performing treatment, Acinetobactor sp. .) NO.SK-0402A
It is preferable to use a strain (Microtech Lab. No. 13232),
For the purpose of further improving nitrogen removal from wastewater, Pseudomonas nitroreducents (Pseudomonas
as nitroreducens), Pseudomonas denitrificans, Micrococcus
Suitable bacterial groups include Micrococcus denitrificans and Denitrobacillus sp.

【００１３】本発明において微生物を浮上濾材に包括固
定する方法は、一般的な微生物の包括固定化法を採用で
きるが、濾材表面を被覆する包括固定ゲルの濾過機能に
及ぼす影響、包括固定ゲルの物理的強度あるいは固定化
微生物浮上濾材の製造コストなどを勘案すれば、固定化
剤としてポリビニールアルコール（ＰＶＡ）を採用した
特開平４−２１８７３号公報に記載に従って、適宜な浮
上濾材を用いて同様の方法によって処理すれば良い。In the present invention, the method for entrapping and fixing the microorganisms on the flotation filter medium can employ a general entrapping method for microorganisms. Considering the physical strength or the manufacturing cost of the immobilized microbial flotation filter, etc., it is the same as described in JP-A-4-21873 employing polyvinyl alcohol (PVA) as the immobilizing agent, using an appropriate flotation filter. It may be processed by the method.

【００１４】本発明における微生物を浮上濾材に包括固
定する製法を具体的に説明すると、培養または採取した
微生物あるいは微生物群培養液に、４〜４０重量％のＰ
ＶＡ水溶液を、ＰＶＡの濃度が１〜２０重量％になるよ
うに混合する。次いで浮上濾材を浸漬し、攪拌して濾材
と当該混合液を充分混合した後、これを取り出して微生
物を死滅させない２０〜８０℃の温度範囲、好ましくは
３０〜５０℃の温度で１２〜４８時間かけて送風乾燥さ
せる。The method for entrapping and fixing the microorganisms on the flotation filter medium in the present invention will be described in detail. To the cultured or collected microorganisms or microorganism group culture solution, 4 to 40% by weight of P is added.
The VA aqueous solution is mixed so that the concentration of PVA is 1 to 20% by weight. Then, the floating filter medium is immersed and stirred to thoroughly mix the filter medium and the mixed solution, and then the mixture is taken out and kept in a temperature range of 20 to 80 ° C., preferably 30 to 50 ° C. for 12 to 48 hours so as not to kill microorganisms. Blow to dry.

【００１５】乾燥が進むにつれてＰＶＡは老成化し、Ｐ
ＶＡの水に対する膨潤溶解性が低下する。さらに乾燥が
進むとＰＶＡ組織の結晶化、結晶の緻密化が起こり微生
物あるいは微生物群は浮上濾材表面に包括固定される。
乾燥終了の後、製造過程において吸着した夾雑物あるい
は結晶化に至らない一部のＰＶＡは、水洗して除去す
る。As the drying progresses, PVA ages and P
The swelling solubility of VA in water decreases. When the drying further proceeds, crystallization of the PVA structure and densification of the crystals occur, and the microorganism or microorganism group is entrapped and fixed on the surface of the floating filter medium.
After completion of the drying, impurities adsorbed in the manufacturing process or a part of PVA that does not lead to crystallization is washed and removed with water.

【００１６】なお排水からの窒素除去を改善する目的
で、浮上濾材にシュードモナス・ニトロレデューセンツ
(Pseudomonas nitroreducens) やシュードモナス・デニ
トリフィカンツ(Pseudomonas denitrificans) 、ミクロ
コッカス・デニトリフィカンツ(Micrococcus denitrifi
cans) 、デニトロバチルス属(Denitrobacillus sp.) の
細菌群を濾材表面に固定する場合には、脱窒菌による硝
酸また亜硝酸態窒素の窒素ガスへの変換に適した、溶存
酸素の到達できない嫌気的環境を濾材表面に設けるた
め、浮上濾材表面の包括固定微生物層の厚みを０．１５
mm以上とする必要がある。For the purpose of improving the removal of nitrogen from waste water, Pseudomonas nitroreducents is used as a floating filter medium.
(Pseudomonas nitroreducens), Pseudomonas denitrificans, and Micrococcus denitrificants.
cans), and a bacterial group of the genus Denitrobacillus sp. is immobilized on the surface of the filter medium, it is suitable for the conversion of nitric acid or nitrite nitrogen into nitrogen gas by denitrifying bacteria, and anaerobic oxygen that cannot reach dissolved oxygen. In order to provide a dynamic environment on the surface of the filter medium, the thickness of the comprehensively immobilized microbial layer on the surface of the floating filter medium is set to 0.15.
It must be at least mm.

【００１７】浮上濾材の表面に包括固定化微生物層の厚
みを０．１５mm以上とするには、前記の製造過程におい
て浮上濾材を浸漬する微生物とＰＶＡの混合液における
ＰＶＡの濃度を４〜２０重量％に、好ましくは１０〜２
０重量％の高濃度とすべきである。または一度浸漬、乾
燥まで終了した浮上濾材を、再度またはさらに何度かか
同様の処理を繰り返したのち、乾燥水洗する。In order to set the thickness of the entrapping immobilization microbial layer on the surface of the flotation filter medium to 0.15 mm or more, the concentration of PVA in the mixed solution of the microorganisms and PVA in which the flotation filter medium is immersed in the above manufacturing process is 4 to 20% by weight. %, Preferably 10-2
It should be a high concentration of 0% by weight. Alternatively, the floating filter medium that has been soaked and dried once is subjected to the same treatment again or several times, and then washed with dry water.

【００１８】本発明方法の実施に適する処理装置の一例
としては、密閉槽内に微生物を包括固定した浮上濾材を
充填し、密閉槽の底部に攪拌翼及び排水の導入口を設け
るとともに、前記浮上濾材層の上層に濾液の取出管を埋
設し、浮上濾材層の下方及び下層部に散気管を設け、さ
らに密閉槽の頂部にエア抜孔を設けたものが挙げられ
る。なお密閉槽内に充填する浮上濾材は、汚水処理性能
に応じて、全量微生物を包括固定したものとしても良い
し、また任意の割合で一部微生物を包括固定していない
ものと混合することもできる。以下、本発明の実施態様
を図面によって具体的に説明する。As an example of a treatment apparatus suitable for carrying out the method of the present invention, a floating filter medium in which microorganisms are entrapped and fixed is filled in a closed tank, a stirring blade and a drainage inlet are provided at the bottom of the closed tank, and the floating is carried out. One example is one in which a filtrate take-out pipe is embedded in the upper layer of the filter medium layer, air diffuser pipes are provided in the lower and lower layers of the floating filter medium layer, and an air vent hole is provided at the top of the closed tank. Note that the floating filter medium to be filled in the closed tank may be one in which all microorganisms are entrapped and fixed depending on the wastewater treatment performance, or may be mixed with one in which some microorganisms are not entrapped and fixed at an arbitrary ratio. it can. Hereinafter, embodiments of the present invention will be specifically described with reference to the drawings.

【００１９】図１において、１は密閉槽、２は密閉槽に
充填した微生物を固定化した浮上濾材、３は密閉槽１の
底部に設けた浮上濾材の洗浄用攪拌翼、４は浮上濾材層
の下層部に埋設した散気管、５は密閉槽１の下部に設け
た散気管を示す。In FIG. 1, 1 is a closed tank, 2 is a floating filter medium on which microorganisms packed in the closed tank are immobilized, 3 is a stirring blade for washing the floating filter medium provided at the bottom of the closed tank 1, and 4 is a floating filter layer. The air diffuser 5 embedded in the lower layer part of the figure shows the air diffuser provided in the lower part of the closed tank 1.

【００２０】６は密閉槽１の下底部に開口する排水の供
給管であり、その他端はポンプＰ1を介して原排水槽７
に接続されている。なお排水の供給管６の回路中、ＰＳ
は圧力スイッチ、８は流量計を示す。次に９は浮上濾材
層の上層部に埋設した濾液の集水管であり、処理水管10
を接続してこれを処理水槽11に開口させるとともに、岐
管10ａを分岐してこの岐管10ａを処理水槽11に接続して
いる。10ｂは岐管10ａに設けた逆止弁、Ｐ2 は逆洗ポン
プを示す。Reference numeral 6 is a drainage water supply pipe that opens to the bottom of the closed tank 1, and the other end is connected to a raw drainage tank 7 via a pump P 1.
It is connected to the. In the circuit of drainage supply pipe 6, PS
Is a pressure switch, and 8 is a flow meter. Next, 9 is a filtrate collecting pipe buried in the upper part of the floating filter medium layer, and the treated water pipe 10
Is connected to the treated water tank 11 to open the same, and the manifold 10a is branched to connect the manifold 10a to the treated water tank 11. 10b is a check valve provided in the manifold 10a, and P 2 is a backwash pump.

【００２１】12は前述の排水の供給管６に接続した排水
管であり、排水弁Ｖ1 によって供給管６と開閉自在にす
るとともに、その他端部には処理水管10から分岐した捨
水管10ｃが接続してある。Ｖ2 は捨水管10ｃに設けた捨
水弁であり、捨水管10ｃは濾過初期の浮遊物質の混入し
た濾液を廃棄するためのものである。また図１において
符号Ｖ4 はエアー抜弁、Ｍ1 は攪拌翼３の駆動モータ
ー、Ｂ1 はブロワーである。Reference numeral 12 denotes a drainage pipe connected to the above-mentioned drainage supply pipe 6, which is made openable and closable with the supply pipe 6 by a drainage valve V 1 and has a drain pipe 10c branched from the treated water pipe 10 at the other end. It is connected. V 2 is a waste water valve provided in the waste water pipe 10 c, and the waste water pipe 10 c is for discarding the filtrate in which the floating substances are mixed at the initial stage of filtration. In FIG. 1, reference numeral V 4 is an air vent valve, M 1 is a drive motor for the stirring blade 3, and B 1 is a blower.

【００２２】供給管６を通じて密閉槽１に供給される排
水は、浮上濾材層を上昇しその過程で浮上濾材に固定化
された微生物と、散気管４、５から空気により生物的処
理がなされるとともに、濾材による浮遊物質の捕捉除去
が行われ、清浄な処理水が得られる。得られた処理水は
処理水管10を経て処理水槽11に取り出される。The wastewater supplied to the closed tank 1 through the supply pipe 6 is biologically treated by the microorganisms fixed to the floating filter medium in the process of ascending the floating filter medium layer and the air from the diffuser pipes 4 and 5. At the same time, the suspended matter is captured and removed by the filter medium, and clean treated water is obtained. The obtained treated water is taken out to the treated water tank 11 through the treated water pipe 10.

【００２３】処理運転中、濾材層が捕捉された浮遊物質
や成長した生物膜によって閉塞されると、密閉槽１内の
圧力が上昇する。この圧力上昇は圧力スイッチＰＳによ
って検知され、その検知信号によって、各機器が作動し
て処理運転から濾材洗浄工程に移行する。圧力スイッチ
ＰＳからの信号によって駆動モーターＭ1 が回転し、目
詰まりした濾材を攪拌して解きほぐす。この時エアー抜
き弁以外の機器、バルブ等は停止している。濾材から開
放された固形分を分離し、濾材層の静止を待った後、逆
洗ポンプＰ2 によって処理水を集水管９から浮上濾材層
に送り濾材を逆洗する。このとき排水弁Ｖ1 は開かれて
おり、濾材に捕捉された浮遊物質や生物膜などの固形分
を含んだ洗浄汚泥水は、排水管12を経て系外に排出され
る。During the treatment operation, when the filter medium layer is blocked by the trapped suspended substances or the grown biofilm, the pressure in the closed tank 1 rises. This increase in pressure is detected by the pressure switch PS, and the detection signal causes each device to operate to shift from the processing operation to the filter medium cleaning step. The drive motor M 1 is rotated by a signal from the pressure switch PS, and the clogged filter medium is stirred and loosened. At this time, all devices and valves other than the air vent valve are stopped. After separating the released solids from the filter medium and waiting for the filter medium layer to stand still, the treated water is sent from the water collecting pipe 9 to the floating filter medium layer to backwash the filter medium by the backwash pump P 2 . At this time, the drain valve V 1 is opened, and the cleaning sludge water containing solid matter such as suspended matter and biofilm captured by the filter medium is discharged to the outside of the system through the drain pipe 12.

【００２４】濾材の洗浄が終わると、逆洗ポンプＰ2 を
停止するとともに、排水弁Ｖ1 を閉止してポンプＰ1 を
作動して処理運転に入る。同時にブロワーＢ1 によって
曝気空気を供給して元の運転に復帰するが、濾材洗浄直
後の濾材層に残存する固形分の処理水への混入を避ける
ため、復帰直後は処理水弁Ｖ3 を閉じて捨水弁Ｖ2 を開
放して、初期の処理水は捨水する。なおこれらの濾材洗
浄操作や汚水の処理操作における各機器並びに弁などの
操作は、所定のタイムチャートに基づいて自動的に行わ
れる。When the cleaning of the filter medium is completed, the backwash pump P 2 is stopped, the drain valve V 1 is closed and the pump P 1 is operated to start the processing operation. At the same time, aeration air is supplied by the blower B 1 to restore the original operation. However, in order to avoid mixing of the solid content remaining in the filter medium layer immediately after washing the filter medium with the treated water, the treated water valve V 3 is closed immediately after restoration. Then, the drain valve V 2 is opened to discard the initial treated water. The operation of each device and valve in the filter material washing operation and the wastewater treatment operation are automatically performed based on a predetermined time chart.

【００２５】[0025]

【作用】本発明方法によれば、排水中の汚濁成分は、密
閉槽の下部から連続的に供給された排水が、微生物を固
定化した浮上濾材層を上昇する過程において、濾材表面
に固定化された微生物と浮上濾材層の散気管から供給さ
れる空気によって酸化分解される。浮上濾材にシュード
モナス・エスピー(Pseudomonas sp.)NO.ＡＥＳ０５３株
（微工研菌寄第１３２３０号）を包括固定したものを充
填しておけば、この過程で一般の微生物種では分解の困
難な界面活性剤が酸化分解される。また同様にアシネト
バクター・エスピー(Acinetobactor sp.)NO.ＳＫ−０４
０２Ａ株（微工研菌寄第１３２３２号）を包括固定した
ものを充填すれば、分解速度が遅く処理を行う上で問題
となる油脂が高度に酸化分解される。According to the method of the present invention, the pollutant components in the wastewater are fixed on the surface of the filter medium in the process in which the wastewater continuously supplied from the lower part of the closed tank rises up the floating filter medium layer on which microorganisms are fixed. The microorganisms are oxidatively decomposed by the air and the air supplied from the air diffuser of the floating filter medium layer. If the floatation filter medium is packed with Pseudomonas sp. NO.AES053 strain (Microtech Lab. No. 13230) fixed and filled, an interface that is difficult for general microbial species to decompose in this process The activator is oxidatively decomposed. Similarly, Acinetobactor sp. NO.SK-04
If the strain in which the 02A strain (Mikken Kenkyubo No. 13232) is entrapped and fixed is filled, fats and oils, which have a slow decomposition rate and are a problem in processing, are highly oxidatively decomposed.

【００２６】また浮上濾材層に脱窒菌を包括固定すると
ともに、包括固定化微生物層の厚みを０．１５mm以上と
したものを充填すれば、処理の過程で自然発生的に出現
する硝化細菌群によって、硝酸態や亜硝酸態まで酸化さ
れた窒素が濾材表面の嫌気的環境下で脱窒菌の働きで窒
素ガスに変換され、排水から窒素が除去される。When the denitrifying bacteria are entrapped and immobilized in the floating filter medium layer and the entrapment-immobilized microbial layer having a thickness of 0.15 mm or more is filled, the nitrifying bacteria that spontaneously appear during the treatment process can be used. Nitrogen that has been oxidized to nitrate or nitrite is converted to nitrogen gas by the action of denitrifying bacteria under the anaerobic environment on the surface of the filter medium, and nitrogen is removed from the wastewater.

【００２７】さらにこれらの処理過程において排水中の
浮遊物質は、排水が微生物を固定化した浮上濾材層を上
昇する過程で濾材によって捕捉除去される。上述のよう
に本発明方法によれば溶解性汚濁物質の酸化分解と、窒
素の除去、浮遊物質の除去を同時に行うことができる。
また処理機能が一定のレベルに上昇するまでに要する期
間も、予め汚濁物質の酸化分解に必要な微生物が濾材表
面に固定化されているので、１〜３日間の極めて短い期
間とすることができる。Further, in these treatment processes, the suspended matter in the wastewater is captured and removed by the filter medium as the wastewater rises up the floating filter medium layer on which microorganisms are immobilized. As described above, according to the method of the present invention, the oxidative decomposition of soluble pollutants, the removal of nitrogen, and the removal of suspended solids can be performed simultaneously.
Also, the period required for the treatment function to rise to a certain level can be set to an extremely short period of 1 to 3 days because the microorganisms required for the oxidative decomposition of pollutants have been immobilized on the filter medium surface in advance. .

【００２８】微生物を固定化した浮上濾材が、捕捉され
た浮遊物質あるいは成長した生物膜によって閉塞された
場合には、底部の攪拌翼を回転させることで洗浄し、濾
材を再生する。濾材から分離した固形分は密閉槽の底部
から系外に排出される。なお濾材表面を被覆する包括固
定ゲルは、攪拌翼の回転程度の物理的衝撃では、破壊さ
れず固定化された微生物は流出しないので、洗浄終了後
の送液を再開した後も、処理機能は低下することなく速
やかに洗浄前の処理機能が復元する。When the floating filter medium on which the microorganisms are immobilized is blocked by the trapped suspended matter or the grown biofilm, the stirring blade at the bottom is rotated to wash and regenerate the filter medium. The solid content separated from the filter medium is discharged from the bottom of the closed tank to the outside of the system. In addition, the entrapping fixed gel that coats the surface of the filter medium does not break down and does not flow out the immobilized microorganisms due to the physical impact of the rotation of the stirring blade. The processing function before cleaning is promptly restored without deterioration.

【００２９】[0029]

【実施例】以下、実施例によって、本発明を具体的に説
明する。 （実施例１）バチルス・ズブチリスＩＦＯ３００９、シ
ュードモナス・エスピーNO. ＡＥＳ０５３株、アシネト
バクター・エスピーNO. ＳＫ−０４０２株、シュードモ
ナス・ニトロレデューセンツＩＦＯ１２６９４を、それ
ぞれブイヨン液体培地で液体培養した後、それぞれの培
養液を合わせ、水で１０倍に希釈して菌数濃度１．８×
１０8 個／mlの希釈培養液４００Ｌを得た。これにポリ
ビニールアルコール（商品名「ＰＶＡ−ＨＣ」、（株）
クラレ製、ケン化度１００％）の２０重量％水溶液４０
０Ｌを混合し均質化した。EXAMPLES The present invention will be specifically described below with reference to examples. Example 1 Bacillus subtilis IFO3009, Pseudomonas sp. NO. AES053 strain, Acinetobacter sp. Combine the liquids and dilute 10 times with water to obtain a bacterial concentration of 1.8 x
400 L of a diluted culture solution of 10 8 cells / ml was obtained. Polyvinyl alcohol (brand name "PVA-HC", Co., Ltd.
Kuraray, saponification degree 100%) 20% by weight aqueous solution 40
0 L was mixed and homogenized.

【００３０】他方発泡ポリプロピレン製の粒状浮上濾材
（長径３.5mm、短径１.5mm、高さ２mm、楕円柱状）を
２.0ｍ3 （重量６００kg）準備し、これを前記ポリビニ
ールアルコールと微生物菌体の混合液に一部ずつ室温で
２時間浸漬した。On the other hand, 2.0 m 3 (weight 600 kg) of granular floating filter material made of expanded polypropylene (major axis 3.5 mm, minor axis 1.5 mm, height 2 mm, elliptic cylinder) was prepared, and this was mixed with the polyvinyl alcohol and microorganisms. Each of the cells was immersed in a mixed solution of the cells at room temperature for 2 hours.

【００３１】濾材を混合液から取り出し水切りした後、
無菌乾燥機内に移し、４０℃の温度で２４時間送風乾燥
した。乾燥終了後老成化状態にまで至らなかったポリビ
ニールアルコールを水洗除去し、再度無菌乾燥機内に移
し、４０℃の温度で２４時間送風乾燥した。このように
して得られた浮上濾材表面の包括固定化微生物層の厚み
は、電子顕微鏡観察の結果おおよそ０.3mmであった。After removing the filter medium from the mixed solution and draining it,
It was transferred to a sterile dryer and blow-dried at a temperature of 40 ° C. for 24 hours. After the completion of the drying, the polyvinyl alcohol which had not reached the aging state was washed off with water, transferred again to the aseptic dryer, and blow-dried at a temperature of 40 ° C for 24 hours. The thickness of the entrapping immobilization microbial layer on the surface of the floating filter medium thus obtained was about 0.3 mm as a result of electron microscopic observation.

【００３２】図１に示される汚水処理装置（密閉槽有効
容積６ｍ3 、密閉槽断面積１.5ｍ2、浮上濾材層の高さ
２.7ｍ）の密閉槽１に、前記微生物を包括固定させた浮
上濾材２.0ｍ3 と固定化処理を行わなかった浮上濾材
２.0ｍ3 とを混合して充填し、食品工場から放出される
排水の処理を行った。The above microorganisms were comprehensively fixed in a closed tank 1 of the sewage treatment apparatus shown in FIG. 1 (closed tank effective volume 6 m 3 , closed tank cross-sectional area 1.5 m 2 , floating filter layer height 2.7 m). and the the floating filter media 2.0 m 3 and floating filter media 2.0 m 3 not subjected to fixing treatment was charged and mixed, was treated waste water discharged from food factories.

【００３３】この処理結果は表１に示すとおりであり、
処理水質は運転開始２日目より放流規制値以下の満足さ
れるレベルにまで低減した。処理水の窒素濃度は、自然
発生的な硝化細菌群の活動が認められるようになった７
日目頃から大幅に低減し、以後安定して窒素除去率が８
０％程度になった。処理された水の水質は以後安定して
推移し、一時的な水質悪化など処理上の問題は認められ
なかった。The results of this treatment are shown in Table 1.
From the 2nd day after the start of operation, the treated water quality was reduced to a satisfactory level below the discharge regulation value. Regarding the nitrogen concentration of treated water, the activity of naturally occurring nitrifying bacteria came to be recognized 7
Significant reduction from day one, stable nitrogen removal rate of 8 thereafter
It became about 0%. The quality of the treated water remained stable thereafter, and no problems such as temporary deterioration of water quality were observed.

【００３４】[0034]

【表１】 [Table 1]

【００３５】（実施例２）シュードモナス・エスピーN
O. ＡＥＳ０５３株、アシネトバクター・エスピーNO.
ＳＫ−０４０２株、シュードモナス・ニトロレデューセ
ンツＩＦＯ１２６９４をそれぞれブイヨン液体培地で培
養した後、それぞれの培養液を合わせ菌数濃度５.2×１
０9 個／mlの培養液３０Ｌを得た。これに下水処理場の
活性汚泥槽にて採取した活性汚泥（ＭＬＳＳ２８００mg
/L）を混合し合計３００Ｌとし、さらポリビニールアル
コール（商品名「ＰＶＡ−ＨＣ」、（株）クラレ製、ケ
ン化度１００％）の８重量％水溶液３００Ｌを混合し均
質化した。(Example 2) Pseudomonas sp. N
O. AES053 strain, Acinetobacter sp. NO.
After culturing the SK-0402 strain and Pseudomonas nitroreducents IFO12694 in broth liquid medium, the respective culture solutions were combined and the bacterial concentration was 5.2 × 1.
30 L of a culture solution of 09 cells / ml was obtained. Activated sludge collected in the activated sludge tank of the sewage treatment plant (MLSS2800mg
/ L) was mixed to make a total of 300 L, and 300 L of an 8 wt% aqueous solution of polyvinyl alcohol (trade name "PVA-HC", manufactured by Kuraray Co., Ltd., saponification degree 100%) was mixed and homogenized.

【００３６】他方発泡ポリプロピレン製の粒状浮上濾材
（直径２mm球状）を４ｍ3 を準備し、これを前記ポリビ
ニールアルコールと微生物菌体の混合液に一部ずつ室温
で２時間浸漬した。On the other hand, 4 m 3 of a granular floating filter material (diameter: 2 mm, spherical) made of expanded polypropylene was prepared and partly immersed in the mixed solution of polyvinyl alcohol and microbial cells at room temperature for 2 hours.

【００３７】濾材を混合液から取り出し水切りした後、
無菌乾燥機内に移し、４０℃の温度で２４時間送風乾燥
した。乾燥終了後、濾材を再度前記のポリビニールアル
コールと微生物菌体の混合液に一部ずつ室温で２時間浸
漬し、以後同様に水切り乾燥した。老成化状態にまで至
らなかったポリビニールアルコールは水洗除去し、再度
無菌乾燥機内に移し、４０℃の温度で２４時間送風乾燥
した。このようにして得られた浮上濾材表面の包括固定
化微生物層の厚みは、電子顕微鏡観察の結果おおよそ
０．４mmであった。After removing the filter medium from the mixed solution and draining it,
It was transferred to a sterile dryer and blow-dried at a temperature of 40 ° C. for 24 hours. After the completion of the drying, the filter medium was again immersed in the above-mentioned mixed solution of polyvinyl alcohol and microbial cells at room temperature for 2 hours at a time, and then similarly drained and dried. Polyvinyl alcohol that had not reached an aged state was washed off with water, transferred again to the aseptic dryer, and blow-dried at a temperature of 40 ° C. for 24 hours. The thickness of the entrapping immobilization microbial layer on the surface of the floating filter medium thus obtained was about 0.4 mm as a result of electron microscopic observation.

【００３８】前記の微生物が固定化された浮上濾材４ｍ
3 を図１に示した汚水処理装置（密閉槽有効容積６
ｍ3 、密閉槽断面積１.5ｍ2 、浮上濾材層の高さ２.7
ｍ）の密閉槽１に充填し、住宅団地の下水処理を行った
ところ、表２に示すとおりの結果であった。4 m of floating filter material on which the above microorganisms are immobilized
3 shows the wastewater treatment device shown in FIG.
m 3 , cross-sectional area of closed tank 1.5 m 2 , height of floating filter layer 2.7
The result was as shown in Table 2 when the closed tank 1 of m) was filled and sewage treatment of the housing complex was performed.

【００３９】（比較例１）比較のために前記汚水処理装
置に、微生物の固定化処理を行わなかった浮上濾材４ｍ
3 を充填し、住宅団地の下水を用いて同様の処理を行っ
たところ、表３に示すとおりの結果であった。(Comparative Example 1) For comparison, a levitation filter medium 4 m in which microorganisms were not immobilized in the sewage treatment apparatus was used.
When 3 was filled and the same treatment was performed using the sewage of the housing complex, the results shown in Table 3 were obtained.

【００４０】これらの試験結果から、固定化処理を行わ
なかった浮上濾材を用いて処理を行った場合には、処理
水質が放流規制値以下のレベルに低減するまで運転開始
後７日間を要した。これに対して微生物の固定化処理を
した浮上濾材を用いた場合には、処理された水の水質は
運転開始後２日目より放流規制値以下の満足できるレベ
ルまで低減した。また処理機能が十分に立ち上がったと
思われる時点におけるＢＯＤ除去率は、固定化処理を行
わなかった浮上濾材を用いた場合を約１０％、また窒素
除去率は約３０％それぞれ上廻っており、微生物の固定
化をした浮上濾材の使用による処理機能の向上が確認さ
れた。From the results of these tests, when the treatment was carried out using the floating filter medium which had not been immobilized, it took 7 days after the start of operation until the treated water quality was reduced to a level below the discharge regulation value. . On the other hand, when the flotation filter medium on which the microorganisms were immobilized was used, the quality of the treated water was reduced to a satisfactory level below the discharge regulation value from the second day after the start of operation. In addition, the BOD removal rate at the time when the treatment function was considered to have sufficiently risen was about 10% when using the flotation filter medium that had not been subjected to the immobilization treatment, and the nitrogen removal rate was approximately 30%. It was confirmed that the treatment function was improved by using the floatation filter medium that was immobilized.

【００４１】図２及び図３は、処理機能が十分に立ち上
がったと思われる運転開始から１４日目に、両者の濾材
洗浄前後に処理した水の水質の変化について調査した結
果を示すものであり、固定化処理を行わなかった浮上濾
材を用いたものは、濾材洗浄、捨水の後、処理運転を開
始してから、水質が濾材洗浄前のレベルに回復するまで
約３０分を要した。これに対して、微生物を固定化した
浮上濾材を用いたものは、処理運転開始後、約１５分で
水質が濾材洗浄前のレベルにまで回復し、微生物を固定
化した浮上濾材が濾材洗浄時の生物膜の剥離、すなわち
濾材表面の生物量の、減少が固定化処理を行わなかった
浮上濾材より少なく、排水汚濁成分の酸化分解性能を常
時高いレベルで維持できることが確認された。FIG. 2 and FIG. 3 show the results of investigation on the change in the water quality of the treated water before and after the washing of both filter media on the 14th day from the start of the operation when the treatment function seems to have been sufficiently raised. In the case of using the floating filter medium not subjected to the immobilization treatment, it took about 30 minutes from the start of the treatment operation after the washing of the filter medium and the drainage, until the water quality was restored to the level before the washing of the filter medium. On the other hand, in the case of using the flotation filter medium on which the microorganisms are immobilized, the water quality is restored to the level before the cleaning of the filtration medium in about 15 minutes after the start of the treatment operation, and the flotation filter medium on which the microorganisms are immobilized is washed during the filtration medium cleaning. It was confirmed that the biofilm peeled off, that is, the amount of biomass on the surface of the filter medium was reduced less than that of the floating filter medium which was not subjected to the immobilization treatment, and that the oxidative decomposition performance of the wastewater pollutant component could be constantly maintained at a high level.

【００４２】[0042]

【表２】 [Table 2]

【００４３】[0043]

【表３】 [Table 3]

【００４４】[0044]

【発明の効果】本発明方法によれば、浮上濾材に予め微
生物を高濃度に包括固定させているので、従来の浮上濾
材を用いた汚水処理装置の処理機能の立ち上がりを大幅
に短縮し、排水処理開始直後から高いレベルの汚水浄化
ができるとともに、濾材洗浄時における濾材表面の生物
量の減少を防止し、排水汚濁成分の酸化分解性能を常時
高いレベルで維持することが可能である。また界面活性
剤や油脂などの難分解性汚濁成分の分解能を持つ、シュ
ードモナス・エスピー(Pseudomonas sp.)NO.ＡＥＳ０５
３株、アシネトバクター・エスピー(Acinetobactor s
p.)NO.ＳＫ−０４０２Ａ株、及び窒素除去性能を有する
脱窒菌を固定化させることによって、処理水の幅広い汚
濁物質について浄化が可能である。EFFECTS OF THE INVENTION According to the method of the present invention, since the microorganisms are preliminarily fixed to the flotation filter medium at a high concentration, the start-up of the treatment function of the conventional sewage treatment apparatus using the flotation filter medium is significantly shortened, and the drainage is improved. It is possible to purify a high level of sewage immediately after the start of treatment, prevent a decrease in the amount of organisms on the surface of the filter medium during washing of the filter medium, and maintain the oxidative decomposition performance of wastewater pollutant components at a high level at all times. Pseudomonas sp. NO.AES05, which has the ability to decompose persistent pollutants such as surfactants and oils and fats
3 strains, Acinetobactor s
By immobilizing p.) NO.SK-0402A strain and denitrifying bacteria having nitrogen removing ability, a wide range of pollutants of treated water can be purified.

【図面の簡単な説明】[Brief description of drawings]

【図１】本発明方法の実施に適する汚水処理装置の一例
を示すフローシートFIG. 1 is a flow sheet showing an example of a sewage treatment apparatus suitable for carrying out the method of the present invention.

【図２】本発明の微生物を固定化処理した浮上濾材を用
いた場合における洗浄前後の水質変化を示す線図FIG. 2 is a diagram showing changes in water quality before and after washing in the case of using the floating filter medium on which the microorganism of the present invention is immobilized.

【図３】比較のために微生物の固定化処理を行わない浮
上濾材を用いた場合における洗浄前後の水質変化を示す
線図FIG. 3 is a diagram showing, for comparison, a change in water quality before and after washing in the case of using a floating filter medium on which a microorganism is not immobilized.

【符号の説明】[Explanation of symbols]

１ 密閉槽 ２ 浮上濾材 1 Closed tank 2 Floating filter medium

───────────────────────────────────────────────────── 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 3/06 3/34 ＺＡＢ １０１ Ｄ Ｂ０１Ｄ 29/08 ５３０ Ｃ ５４０ Ａ ─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. 6 Identification code Internal reference number FI Technical display location C02F 3/06 3/34 ZAB 101 D B01D 29/08 530 C 540 A

Claims (4)

【特許請求の範囲】[Claims] 【請求項１】 密閉槽内に浮上濾材を充填し、この浮上
濾材層に下方から汚水と曝気用の空気を供給して汚濁成
分を分解する汚水の処理装置において、微生物が高濃度
に包括固定された浮上濾材を用いることを特徴とする汚
水の処理方法。1. A sewage treatment apparatus in which a flotation filter medium is filled in a closed tank, and sewage water and aeration air are supplied to the flotation filter medium layer from below to decompose pollutants. Method for treating sewage, which comprises using the floated filter material. 【請求項２】 浮上濾材に包括固定する微生物として、
界面活性剤に対して分解性能を示すシュードモナス・エ
スピー(Pseudomonas sp.)NO.ＡＥＳ０５３株（微工研菌
寄第１３２３０号）を用いた請求項１に記載の方法。2. A microorganism that is entrapped and fixed on a floating filter medium,
The method according to claim 1, wherein Pseudomonas sp. NO. AES053 strain (Microtechnology Research Institute No. 13230), which exhibits degrading performance with respect to a surfactant, is used. 【請求項３】 浮上濾材に包括固定する微生物として、
油脂に対して優れた分解性能を示すアシネトバクター・
エスピー(Acinetobactor sp.)NO.ＳＫ−０４０２Ａ株
（微工研菌寄第１３２３２号）を用いた請求項１に記載
の方法。3. A microorganism to be entrapped and fixed on a floating filter medium,
Acinetobacter showing excellent decomposition performance for oils and fats.
The method according to claim 1, wherein SPINE (Acinetobactor sp.) NO. SK-0402A strain (Microtechnical Laboratory No. 13232) is used. 【請求項４】 浮上濾材に包括固定する微生物として、
脱窒菌を用い且つ浮上濾材表面における包括固定化微生
物層の厚みを０．１５mm以上とした請求項１に記載の方
法。4. A microorganism to be entrapped and fixed on a floating filter medium,
The method according to claim 1, wherein denitrifying bacteria are used, and the thickness of the entrapping immobilization microbial layer on the surface of the floating filter medium is 0.15 mm or more.
JP6042016A 1994-02-15 1994-02-15 Waste water treatment method Pending JPH07222988A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP6042016A JPH07222988A (en) 1994-02-15 1994-02-15 Waste water treatment method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP6042016A JPH07222988A (en) 1994-02-15 1994-02-15 Waste water treatment method

Publications (1)

Publication Number Publication Date
JPH07222988A true JPH07222988A (en) 1995-08-22

Family

ID=12624383

Family Applications (1)

Application Number Title Priority Date Filing Date
JP6042016A Pending JPH07222988A (en) 1994-02-15 1994-02-15 Waste water treatment method

Country Status (1)

Country Link
JP (1) JPH07222988A (en)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1998039962A1 (en) * 1997-03-11 1998-09-17 Biofil Limited Hydroponic plant culture systems
KR100342925B1 (en) * 1999-04-13 2002-07-03 박병권 Polyurethane sorbent for removing oil spills by adsorption and decomposition from water polluted by oil and a method for preparation thereof
KR100427222B1 (en) * 2001-09-21 2004-04-14 (주)전테크 Novel Pseudomonas sp. strain for degradation of lipid and lipid degradation method using thereof
KR100444889B1 (en) * 2002-05-21 2004-08-21 (주)전테크 Matrices for fats degradation and a FOG trap apparatus equipped with the matrices
JP2004298701A (en) * 2003-03-31 2004-10-28 Hitachi Plant Eng & Constr Co Ltd Method for reducing volume of carrier and method for transporting the carrier
KR100817929B1 (en) * 2006-08-21 2008-03-31 박경량 Novel pseudomonas sp. g314 producing biosurfactant
JP2010207800A (en) * 2009-02-16 2010-09-24 Kuraray Co Ltd Filtration unit, and filtration apparatus including the same

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1998039962A1 (en) * 1997-03-11 1998-09-17 Biofil Limited Hydroponic plant culture systems
KR100342925B1 (en) * 1999-04-13 2002-07-03 박병권 Polyurethane sorbent for removing oil spills by adsorption and decomposition from water polluted by oil and a method for preparation thereof
KR100427222B1 (en) * 2001-09-21 2004-04-14 (주)전테크 Novel Pseudomonas sp. strain for degradation of lipid and lipid degradation method using thereof
KR100444889B1 (en) * 2002-05-21 2004-08-21 (주)전테크 Matrices for fats degradation and a FOG trap apparatus equipped with the matrices
JP2004298701A (en) * 2003-03-31 2004-10-28 Hitachi Plant Eng & Constr Co Ltd Method for reducing volume of carrier and method for transporting the carrier
KR100817929B1 (en) * 2006-08-21 2008-03-31 박경량 Novel pseudomonas sp. g314 producing biosurfactant
JP2010207800A (en) * 2009-02-16 2010-09-24 Kuraray Co Ltd Filtration unit, and filtration apparatus including the same
US9050563B2 (en) 2009-02-16 2015-06-09 Kuraray Co., Ltd. Filtering device and method of manufacturing same

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