JP2693099B2 - Biological treatment method and acclimation method of microorganisms - Google Patents
Biological treatment method and acclimation method of microorganismsInfo
- Publication number
- JP2693099B2 JP2693099B2 JP5023447A JP2344793A JP2693099B2 JP 2693099 B2 JP2693099 B2 JP 2693099B2 JP 5023447 A JP5023447 A JP 5023447A JP 2344793 A JP2344793 A JP 2344793A JP 2693099 B2 JP2693099 B2 JP 2693099B2
- Authority
- JP
- Japan
- Prior art keywords
- wastewater
- treatment
- bioreactor
- steel sheet
- rolled steel
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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)
- Activated Sludge Processes (AREA)
- Physical Water Treatments (AREA)
Description
【０００１】[0001]
【産業上の利用分野】本発明は、加圧浮上処理後の冷延
工程製造工程排水の、より詳細には、界面活性剤等を多
量に含有する、高ＣＯＤ排水の生物学的処理方法及びそ
のための微生物の馴養方法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for biological treatment of wastewater from cold-rolling process after pressure floating treatment, more specifically, high COD wastewater containing a large amount of surfactant and the like. It relates to a method of acclimatizing microorganisms for that purpose.
【０００２】[0002]
【従来の技術】都市下水、団地下水、産業廃水等に含ま
れているＢＯＤ、ＣＯＤ、シアン化合物、硫化物、或い
は、フェノール化合物等の汚濁物を生物学的に処理する
方法は、既に多くの文献等により既知となっている。2. Description of the Related Art Methods for biologically treating pollutants such as BOD, COD, cyanide compounds, sulfides, and phenol compounds contained in urban sewage, aggregate groundwater, industrial wastewater, etc. It is known from the literature.
【０００３】ガス廃液を活性汚泥処理法で処理する場
合、バイオリアクター（曝気槽）の酸化還元電位を指標
にして曝気量を管理、制御すると良好な処理水が得られ
る事を本発明者の一人が既に特開昭５４―１５２３５１
号、特開昭５５―０６４８９６号等で明らかにしてい
る。It is one of the inventors of the present invention that, when treating a gas waste liquid by an activated sludge treatment method, good treated water can be obtained by controlling and controlling the aeration amount using the redox potential of a bioreactor (aeration tank) as an index. Already disclosed in JP-A-54-152351
And JP-A-55-064896.
【０００４】また、汚濁物質を微生物学的に分解する
際、リアクター内の酸化還元電位を自由反応エネルギー
の変化から求めた値に保つことより、活性汚泥およびス
ラッジから有用微生物を迅速に増殖・培養できることを
本発明者等は特願平０４―１８０５３１号で明らかにし
ている。Further, when decomposing pollutants microbiologically, by keeping the redox potential in the reactor at a value obtained from the change in free reaction energy, useful microorganisms can be rapidly grown and cultured from activated sludge and sludge. The present inventors have made clear what can be done in Japanese Patent Application No. 04-180531.
【０００５】[0005]
【発明が解決しようとする課題】現在設置されている実
機においては、界面活性剤等を多量に含有する加圧浮上
処理後の冷延鋼板製造工程排水を生物学的に処理する場
合、排水に含まれるＣＯＤ成分が微生物に対し非常に難
分解性であるため、流動床バイオリアクターにおける排
水の滞留時間（ＨＲＴ）が２４時問と長時間の滞留時間
を必要とすることより大規模なリアクターの建設が必要
である。In the actual equipment currently installed, when biologically treating the cold-rolled steel sheet manufacturing process wastewater after the pressure floating process containing a large amount of surfactants, etc. Since the contained COD components are very difficult to decompose against microorganisms, the retention time (HRT) of wastewater in the fluidized bed bioreactor is 24 hours and requires a long retention time. Construction is needed.
【０００６】また、運転管理項目がバイオリアクターに
おけるＳＶ30およびＭＬＳＳのみであることより高ＣＯ
Ｄ負荷時のバイオリアクターでの活性汚泥のバルキング
や処理不調が発生し易く、リアクターの構造を多段にす
る必要があった。[0006] In addition, since the operational control items are only SV 30 and MLSS in the bioreactor, higher CO
Bulking of activated sludge in the bioreactor under load D and treatment failure were likely to occur, and it was necessary to make the reactor structure in multiple stages.
【０００７】従って、リアクター構造が複雑となり、維
持管理においても複雑であった。Therefore, the reactor structure is complicated, and maintenance is also complicated.
【０００８】更に、特開昭５４―１５２３５１号、特開
昭５５―０６４８９６号及び特願平０４―１８０５３１
号においては、界面活性剤を多量に含有する排水につい
ての処理方法が明確でない。Further, JP-A-54-152351, JP-A-55-064896 and Japanese Patent Application No. 04-180531.
In No. 6, the treatment method for wastewater containing a large amount of surfactant is not clear.
【０００９】本発明は、大規模なリアクターを必要とせ
ず、維持管理も容易で、界面活性剤を多量に含有する排
水にも適用可能な加圧浮上処理後の冷延鋼板製造工程排
水の生物学的処理方法及びそのための微生物の馴致方法
を提供する事を目的とする。The present invention does not require a large-scale reactor, is easy to maintain, and is applicable to wastewater containing a large amount of a surfactant. The object of the present invention is to provide a biological treatment method and a method for accommodating microorganisms therefor.
【００１０】[0010]
【課題を解決するための手段】本発明は、かかる問題を
解決するため、下水・産業廃水を処理する活性汚泥およ
びスラッジから加圧浮上処理後の冷延鋼板製造工程排水
を生物学的に処理するのに適した有用微生物を活用する
事を骨子とし、さらにその有用微生物を培養・増殖する
場合、ウォッシュアウトしやすい微生物を冷延鋼板製造
工程排水の加圧浮上処理時に生じた凝集剤を十分に含ん
だ懸濁物質（ＳＳ）を利用して自己造粒させ、なおかつ
リアクター内部の酸化還元電位（ＯＲＰ）を排水中に含
まれている汚濁物質を分解するのに適した電位に維持す
る事を特徴とする。In order to solve the above problems, the present invention biologically treats wastewater of a cold-rolled steel sheet manufacturing process after pressure floating treatment from activated sludge and sludge for treating sewage / industrial wastewater. The main idea is to utilize useful microorganisms that are suitable for culturing, and in the case of culturing and multiplying the useful microorganisms, microorganisms that are easy to wash out should be treated with sufficient flocculant generated during the pressure floating process of the cold rolled steel sheet manufacturing process wastewater. Self-granulating using suspended solids (SS) contained in, and maintaining the redox potential (ORP) inside the reactor at a potential suitable for decomposing pollutants contained in wastewater. Is characterized by.
【００１１】この場合、リアクター内の酸化還元電位
は、＋２５ｍＶ（Ａｇ／ＡｇＣｌ電極基準）以上に保つ
事が好ましい。In this case, it is preferable to maintain the redox potential in the reactor at +25 mV (Ag / AgCl electrode standard) or more.
【００１２】また、リアクター内のｐＨを微生物が活性
化し、処理効率を向上させるのに適した値に制御する事
を目的とする。この場合リアクター内のｐＨを６〜７．
５に制御する事が好ましい。Another object of the present invention is to control the pH in the reactor to a value suitable for activating microorganisms and improving treatment efficiency. In this case, the pH in the reactor is 6-7.
It is preferable to control to 5.
【００１３】即ち、本発明の要旨とするところは、 （１）加圧浮上処理した後の冷延鋼板製造工程排水を処
理する際、流動床型バイオリアクターにおいて下水、産
業排水を処理する活性汚泥により、あるいはスラッジか
ら馴養した微生物により該排水を処理するとともに、前
記加圧浮上処理する時に生じる高分子凝集剤を含む懸濁
物質（ＳＳ）をバイオリアクターに添加することによ
り、該バイオリアクターにおける活性汚泥を凝集させる
ことを特徴とする加圧浮上処理後の冷延鋼板製造工程排
水の生物学的処理方法。That is, the gist of the present invention is: (1) Activated sludge for treating sewage and industrial wastewater in a fluidized bed bioreactor when treating wastewater in the cold-rolled steel sheet manufacturing process after pressure floating treatment. Activity in the bioreactor by treating the wastewater with a microorganism acclimated from sludge or adding a suspended substance (SS) containing a polymer flocculant generated during the pressure floating treatment to the bioreactor. A method for biologically treating wastewater from a cold-rolled steel sheet manufacturing process after pressure flotation, which comprises aggregating sludge.
【００１４】（２）下水、産業排水を処理する活性汚泥
により、あるいはスラッジから馴養した微生物を、加圧
浮上処理した後の冷延鋼板製造工程排水を処理するよう
馴養する際、流動床型バイオリアクターに供給する曝気
空気量または供給する排水量を調節することにより当該
バイオリアクターに設置した酸化還元電位（ＯＲＰ）セ
ンサーによって検知した電位を制御するとともに、前記
冷延鋼板製造工程排水を加圧浮上処理するときに生じる
高分子凝集剤を含む懸濁物質（ＳＳ）をバイオリアクタ
ーに添加することにより当該バイオリアクターにおける
活性汚泥を凝集させることを特徴とする、加圧浮上処理
後の冷延鋼板製造工程排水の生物学的処理のための微生
物の馴養方法。(2) When acclimating microorganisms acclimated with activated sludge for treating sewage or industrial wastewater or from sludge to treat effluent of cold-rolled steel sheet manufacturing process after pressure floating treatment, fluidized bed type biotechnology The potential detected by an oxidation-reduction potential (ORP) sensor installed in the bioreactor is controlled by adjusting the amount of aeration air supplied to the reactor or the amount of drainage supplied, and the wastewater discharged from the cold-rolled steel sheet manufacturing process is pressurized and floated. A process for producing a cold-rolled steel sheet after pressurized flotation treatment, characterized in that the activated sludge in the bioreactor is aggregated by adding a suspended substance (SS) containing a polymer flocculant generated when the bioreactor is aggregated. Method of acclimatizing microorganisms for biological treatment of wastewater.
【００１５】[0015]
【００１６】[0016]
【００１７】[0017]
【００１８】[0018]
【００１９】[0019]
【００２０】[0020]
【００２１】[0021]
【００２２】[0022]
【００２３】[0023]
【００２４】[0024]
【作用】図１に本発明方法を実施するために使用する加
圧浮上処理後の冷延鋼板製造工程排水処理用の流動床型
バイオリアクターの構成図の例を示す。FIG. 1 shows an example of a block diagram of a fluidized bed type bioreactor used for carrying out the method of the present invention for treating waste water of a cold-rolled steel sheet manufacturing process after pressure floating treatment.
【００２５】本発明者らは、下水、産業廃水の処理を行
っている活性汚泥およびスラッジに、加圧浮上処理後の
冷延鋼板製造工程排水に含まれるＣＯＤ成分を分解する
微生物が存在することを見いだした。The inventors of the present invention have found that activated sludge and sludge for treating sewage and industrial wastewater contain microorganisms that decompose COD components contained in the cold rolled steel sheet manufacturing process wastewater after pressure floating treatment. I found it.
【００２６】これは、洗剤に起因する界面活性剤が下
水、産業排水に存在することにより、活性汚泥が界面活
性剤に馴致されていることによる。This is because the activated sludge is adapted to the surfactant due to the presence of the surfactant derived from the detergent in sewage and industrial wastewater.
【００２７】即ち、下水・産業廃水を処理している活性
汚泥およびスラッジから、後述する方法により優先的に
馴養・増殖した微生物は、加圧浮上処理後の冷延鋼板製
造工程排水に含まれるＣＯＤ成分を酸化分解する機能が
ある。That is, microorganisms preferentially acclimatized and propagated from activated sludge and sludge treating sewage / industrial wastewater by the method described later are contained in the COD contained in the cold rolled steel sheet manufacturing process wastewater after the pressure floating treatment. It has the function of oxidizing and decomposing components.
【００２８】また、微生物を馴養・培養しようとするリ
アクターに冷延鋼板製造工程排水の加圧浮上処理時に生
じる凝集剤、例えば高分子凝集剤を十分に含んだ懸濁物
質（ＳＳ）を少量ずつ添加すると活性汚泥が造粒し、有
用な微生物のウォッシュアウトが少なくなる。これは、
活性汚泥が造粒化したため活性汚泥の沈降性が改善され
た為である。Further, in a reactor for acclimatizing and culturing microorganisms, a suspending substance (SS) containing a sufficient amount of a flocculant, for example, a polymer flocculant, which is generated during pressure floating treatment of wastewater in the cold rolled steel sheet manufacturing process is added little by little. When added, activated sludge is granulated, and washout of useful microorganisms is reduced. this is,
This is because the settling property of the activated sludge was improved because the activated sludge was granulated.
【００２９】図１に示すようなＯＲＰセンサー１０、Ｏ
ＲＰ制御器３、ｐＨセンサー１１、ｐＨ制御器４等を備
えた流動床型バイオリアクター１に下水あるいは、産業
廃水を処理している活性汚泥混合液を入れ、加圧浮上処
理後の冷延鋼板製造工程排水に含まれるＣＯＤ成分を分
解するのに適した酸化還元電位（ＯＲＰ）＋２５ｍＶ
（Ａｇ／ＡｇＣｌ電極基準）以上に維持しながら上記排
水を徐々に供給すれば、このＣＯＤ成分を酸化分解する
微生物が容易に増殖する。ORP sensor 10, O as shown in FIG.
Cold-rolled steel sheet after levitation treatment by putting sewage or activated sludge mixed liquid treating industrial wastewater into a fluidized bed bioreactor 1 equipped with RP controller 3, pH sensor 11, pH controller 4, etc. Redox potential (ORP) +25 mV suitable for decomposing COD components contained in manufacturing process wastewater
By gradually supplying the wastewater while maintaining the above (Ag / AgCl electrode standard) or more, microorganisms that oxidize and decompose this COD component easily grow.
【００３０】ＯＲＰが＋２５ｍＶ（Ａｇ／ＡｇＣｌ電極
基準）未満では、リアクター内に存在する微生物が嫌気
的条件になるため、若干処理効率が低下する。When the ORP is less than +25 mV (Ag / AgCl electrode standard), the microorganisms present in the reactor are under anaerobic conditions, and the treatment efficiency is slightly lowered.
【００３１】処理効率とは、（リアクター入口ＣＯＤ値
―リアクター出口ＣＯＤ値）／（リアクター入口ＣＯＤ
値）と定義する。The treatment efficiency is (reactor inlet COD value-reactor outlet COD value) / (reactor inlet COD value)
Value).
【００３２】この時、リアクターに冷延鋼板製造工程排
水の加圧浮上処理時に生じる凝集剤を十分に含んだ懸濁
物質（ＳＳ）を１０〜３０ｍｇ／ｌ程度添加すると活性
汚泥が造粒し、有用な微生物のウォッシュアウトが少な
り、容易に馴養することができる。At this time, when a suspended substance (SS) containing about 10 to 30 mg / l of a sufficient amount of a flocculant generated during the pressure floating process of the wastewater of the cold rolled steel sheet manufacturing process is added to the reactor, the activated sludge is granulated, There is little washout of useful microorganisms and it can be easily acclimatized.
【００３３】この考えに基づいてこれらのＣＯＤ成分を
酸化分解する微生物の馴養・培養を行う。Based on this idea, acclimation and culture of microorganisms that oxidatively decompose these COD components are carried out.
【００３４】まず、図１に示す流動床型バイオリアクタ
ーに下水処理を行っている活性汚泥混合液を入れる。First, the activated sludge mixed liquid which has been treated with sewage is put into the fluidized bed type bioreactor shown in FIG.
【００３５】この後、リアクター１のＯＲＰ値を＋２５
ｍＶ（Ａｇ／ＡｇＣｌ電極基準）以上に設定し、加圧浮
上処理後の冷延鋼板製造工程排水の処理時間が例えば８
時間になるように供給する。After that, the ORP value of the reactor 1 is set to +25.
MV (Ag / AgCl electrode standard) or higher, and the treatment time of the cold-rolled steel sheet manufacturing process wastewater after the pressure floating process is, for example, 8
Supply on time.
【００３６】この時、活性汚泥の馴養不足により低下し
ていたＯＲＰ値が＋２５ｍＶ（Ａｇ／ＡｇＣｌ電極基
準）に達したら処理時間を順次例えば６、４、３時間と
短縮しながら微生物の増殖をはかる。At this time, when the ORP value, which has been lowered due to lack of acclimatization of activated sludge, reaches +25 mV (Ag / AgCl electrode standard), the treatment time is successively shortened to, for example, 6, 4, and 3 hours to grow microorganisms. .
【００３７】この時、リアクター１に冷延鋼板製造工程
排水の加圧浮上処理時に生じる凝集剤を十分に含んだ懸
濁物質（ＳＳ）を少量ずつ添加し活性汚泥を造粒させ
る。At this time, the suspended sludge (SS) sufficiently containing the flocculant generated during the pressure floating treatment of the wastewater of the cold-rolled steel sheet manufacturing process is added little by little to the reactor 1 to granulate the activated sludge.
【００３８】リアクター１におけるＯＲＰ値が＋２５ｍ
Ｖ（Ａｇ／ＡｇＣｌ電極基準）以上になるように、ＯＲ
Ｐセンサー（金―銀／塩化銀複合電極）１０によって酸
化還元電位を測定し、設定電位より低い場合には、ルー
ツブロワー５の回転数をＯＲＰ制御器３とインバーター
１２によって制御して上昇させる。ORP value in reactor 1 is +25 m
OR so that it is V (Ag / AgCl electrode reference) or more
The redox potential is measured by the P sensor (gold-silver / silver chloride composite electrode) 10. If it is lower than the set potential, the rotation speed of the roots blower 5 is controlled by the ORP controller 3 and the inverter 12 to increase.
【００３９】逆に、設定電位より高い場合には、ルーツ
ブロワー５の回転数をＯＲＰ制御器３とインバーター１
２によって制御してＯＲＰ値を制御する。On the contrary, when the potential is higher than the set potential, the rotation speed of the roots blower 5 is changed to the ORP controller 3 and the inverter 1.
2 to control the ORP value.
【００４０】また、リアクター１内のｐＨ値は、６〜
７．５の時、微生物が活性化する為、さらに処理効率が
向上するので、ｐＨセンサー１１、ｐＨ制御器４によっ
て酸・アルカリの添加ポンプを稼働することにより制御
する。The pH value in the reactor 1 is 6 to
At 7.5, the microorganisms are activated and the treatment efficiency is further improved. Therefore, the pH sensor 11 and the pH controller 4 are used to operate the acid / alkali addition pump for control.
【００４１】[0041]
【実施例１】下水の活性汚泥を流動床型バイオリアクタ
ーに投入し、加圧浮上処理後の冷延鋼板製造工程排水を
処理時間が８時間となるように通水した。[Example 1] Activated sludge of sewage was put into a fluidized bed type bioreactor, and wastewater of the cold-rolled steel sheet manufacturing process after pressure floating treatment was passed so that the treatment time was 8 hours.
【００４２】この時、冷延鋼板製造工程排水の加圧浮上
処理時に生じる凝集剤を十分に含んだ懸濁物質（ＳＳ）
を原水に対し１０〜３０ｍｇ／ｌ程度となるようにリア
クターに供給した。At this time, a suspended substance (SS) containing a sufficient amount of a flocculant generated during the pressure floating treatment of the wastewater of the cold rolled steel sheet manufacturing process.
Was supplied to the reactor so that the amount of raw water was about 10 to 30 mg / l.
【００４３】また、リアクターのＯＲＰ値を＋２５ｍＶ
（Ａｇ／ＡｇＣｌ電極基準）以上に保つようにエアーの
調整を行いながらリアクターに曝気し、リアクター内部
のｐＨを７程度に保つように酸・アルカリで調整しなが
ら馴養を行った。Further, the ORP value of the reactor is +25 mV
(Ag / AgCl electrode standard) The reactor was aerated while adjusting the air so as to keep it above, and acclimatization was performed while adjusting the pH inside the reactor with acid / alkali so as to keep it at about 7.
【００４４】１〜２日で冷延鋼板製造工程排水の加圧浮
上処理後の排水に含まれるＣＯＤ成分を酸化分解するよ
うになった。After 1 to 2 days, the COD component contained in the wastewater after the pressure floating process of the wastewater of the cold-rolled steel sheet manufacturing process was oxidatively decomposed.
【００４５】上記方法により微生物の馴養を行ったリア
クターに、上記排水を処理時間が８時間、６時間、４時
間、３時間となるように順次処理時間を短縮しながら通
水し、リアクターのＯＲＰ値を＋２５ｍＶ（Ａｇ／Ａｇ
Ｃｌ電極基準）以上になるように管理し冷延鋼板製造工
程排水の加圧浮上処理時に生じる凝集剤を十分に含んだ
懸濁物質を少量ずつ添加しながら処理を行った場合、リ
アクター内の活性汚泥のＳＶＩ（汚泥容量指標）は、図
２に示すように徐々に改善されていった。The wastewater is passed through the reactor in which the microorganisms have been acclimated by the above method while the treatment time is sequentially shortened so that the treatment time is 8 hours, 6 hours, 4 hours, 3 hours, and the ORP of the reactor The value is +25 mV (Ag / Ag
(Cl electrode standard) When the treatment is carried out while adding little by little the suspended substance sufficiently containing the flocculant generated during the pressure floating process of the cold rolled steel sheet manufacturing process, the activity inside the reactor is controlled. The SVI (sludge capacity index) of sludge was gradually improved as shown in FIG.
【００４６】またこの時の処理水の性状は、ＣＯＤ＜３
０ｍｇ／ｌ、ＳＳ＜５ｍｇ／ｌと良好であった。The property of the treated water at this time is COD <3.
0 mg / l and SS <5 mg / l were good.
【００４７】[0047]
【実施例２】実施例１と同様な方法により馴養された活
性汚泥を用いて、ＳＳを完全に除去した冷延鋼板製造工
程排水の加圧浮上処理後の排水を処理した。[Example 2] Using activated sludge acclimated in the same manner as in Example 1, the wastewater after the pressure floating process of the cold rolled steel sheet manufacturing process wastewater from which SS was completely removed was treated.
【００４８】処理方法は、上記排水を処理時間が８時
間、６時間、４時間、３時間となるように順次処理時間
を短縮しながら通水し、リアクターのＯＲＰ値を＋２５
ｍＶ（Ａｇ／ＡｇＣｌ電極基準）以上になるように管理
しＳＳを完全に除去した冷延鋼板製造工程排水の加圧浮
上処理水を処理した。また、リアクタ一内のｐＨを６〜
７．５程度に制御した。In the treatment method, the waste water is passed through the reactor while sequentially shortening the treatment time so that the treatment time becomes 8 hours, 6 hours, 4 hours, and 3 hours, and the ORP value of the reactor is +25.
The pressure-floating treated water of the cold-rolled steel sheet manufacturing process wastewater, in which SS was completely removed by controlling so as to be mV (Ag / AgCl electrode standard) or more, was treated. In addition, the pH in the reactor 1 is 6 to
It was controlled to about 7.5.
【００４９】この時、リアクター内の活性汚泥のＳＶＩ
（汚泥容量指標）は、図３に示すように徐々に上昇し、
更に３時間処理を継続するとＳＳがウォッシュアウトし
た。At this time, SVI of the activated sludge in the reactor
(Sludge capacity index) gradually increases as shown in FIG.
When the treatment was continued for another 3 hours, SS was washed out.
【００５０】この時の処理水の性状は、ＣＯＤ≒５０ｍ
ｇ／ｌ、ＳＳ＞５０ｍｇ／ｌのように悪化した。The property of the treated water at this time is COD≈50 m.
g / l, SS> 50 mg / l.
【００５１】リアクターのＳＶＩが１５０ｍｌ／ｇを越
えたとき、冷延鋼板製造工程排水の加圧浮上処理水を供
給すると同時に、冷延鋼板製造工程排水の加圧浮上処理
時に生じる凝集剤を十分に含んだ懸濁物質（ＳＳ）を原
水に対し１０〜３０ｍｇ／ｌ程度となるようにリアクタ
ーに供給した。When the SVI of the reactor exceeds 150 ml / g, the pressure floating treatment water of the cold rolled steel sheet manufacturing process wastewater is supplied, and at the same time, the flocculant generated during the pressure floating treatment of the cold rolled steel sheet manufacturing process wastewater is sufficiently supplied. The suspended substance (SS) contained was supplied to the reactor so as to be about 10 to 30 mg / l with respect to the raw water.
【００５２】その結果、リアクターのＳＶＩは、徐々に
減少し、５０ｍｌ／ｇ程度まで減少した。この時の処理
水の性状は、ＣＯＤ＜３０ｍｇ／ｌ、ＳＳ＜５ｍｇ／ｌ
と良好であった。As a result, the SVI of the reactor gradually decreased to about 50 ml / g. The properties of the treated water at this time are COD <30 mg / l, SS <5 mg / l
And was good.
【００５３】[0053]
【実施例３】実施例１と同様な方法により馴養された活
性汚泥を用いて、ＳＳを完全に除去した冷延鋼板製造工
程排水の加圧浮上処理後の排水を処理した。[Example 3] Using activated sludge acclimated in the same manner as in Example 1, the wastewater after the pressure floating process of the cold rolled steel sheet manufacturing process wastewater from which SS was completely removed was treated.
【００５４】処理方法は、上記排水を処理時間が８時
間、６時間、４時間、３時間となるように順次処理時間
を短縮しながら通水し、リアクターのＯＲＰ値を＋２５
ｍＶ（Ａｇ／ＡｇＣｌ電極基準）以上になるように管理
しＳＳを完全に除去した冷延鋼板製造工程排水の加圧浮
上処理水を処理した。なお、ｐＨ制御は、行わなかっ
た。In the treatment method, the waste water is passed while reducing the treatment time sequentially so that the treatment time becomes 8 hours, 6 hours, 4 hours, 3 hours, and the ORP value of the reactor is +25.
The pressure-floating treated water of the cold-rolled steel sheet manufacturing process wastewater, in which SS was completely removed by controlling so as to be mV (Ag / AgCl electrode standard) or more, was treated. The pH control was not performed.
【００５５】この時、リアクター内の活性汚泥のＳＶＩ
（汚泥容量指標）は、図３に示すように徐々に上昇して
いった。また、この時の処理水の性状は、ＣＯＤ≒５０
ｍｇ／ｌ、ＳＳ＞５０ｍｇ／ｌであった。At this time, the SVI of the activated sludge in the reactor
(Sludge capacity index) gradually increased as shown in FIG. In addition, the property of the treated water at this time is COD≈50.
mg / l, SS> 50 mg / l.
【００５６】[0056]
【実施例４】実施例１と同様な方法により馴養された活
性汚泥を用いて、加圧浮上処理後の冷延鋼板製造工程排
水を処理した。[Example 4] The activated sludge acclimated in the same manner as in Example 1 was used to treat the effluent of the cold-rolled steel sheet manufacturing process after the pressure floating process.
【００５７】この時、冷延鋼板製造工程排水の加圧浮上
処理時に生じる凝集剤を十分に含んだ懸濁物質（ＳＳ）
を原水に対し１０〜３０ｍｇ／ｌ程度となるようにリア
クターに供給した。At this time, a suspended substance (SS) containing a sufficient amount of a flocculant generated during the pressure floating process of the wastewater of the cold rolled steel sheet manufacturing process.
Was supplied to the reactor so that the amount of raw water was about 10 to 30 mg / l.
【００５８】処理方法は、上記排水を処理時間が８時
間、６時間、４時間、３時間となるように順次処理時間
を短縮しながら通水した。As for the treatment method, the waste water was passed while successively shortening the treatment time so that the treatment time was 8 hours, 6 hours, 4 hours, and 3 hours.
【００５９】また、リアクターのＯＲＰ値を＋２５ｍＶ
（Ａｇ／ＡｇＣｌ電極基準）以上に保つようにエアーの
調整を行いながらリアクターに曝気した。なお、リアク
ターのｐＨの制御は行わなかった。The ORP value of the reactor is +25 mV.
(Ag / AgCl electrode standard) The reactor was aerated while adjusting the air so as to maintain the above. The pH of the reactor was not controlled.
【００６０】この時、ＳＶＩは５０〜１００ｍｌ／ｇ程
度であり、処理水の性状はＣＯＤ＜３０ｍｇ／ｌ、ＳＳ
＜５ｍｇ／ｌと良好な処理が行われた。At this time, the SVI is about 50 to 100 ml / g, the property of the treated water is COD <30 mg / l, SS
Good treatment with <5 mg / l.
【００６１】[0061]
【発明の効果】本発明により、微生物に対し難分解性Ｃ
ＯＤ成分を含む加圧浮上処理後の冷延鋼板製造工程排水
を処理できる微生物を短期間で馴養・増殖でき、しかも
加圧浮上処理後の冷延鋼板製造工程排水を高効率に処理
できる。INDUSTRIAL APPLICABILITY According to the present invention, C which is hardly decomposed against microorganisms
Microorganisms capable of treating the cold-rolled steel sheet manufacturing process wastewater containing the OD component after the pressure floating treatment can be acclimatized and multiplied in a short period of time, and the cold-rolled steel sheet manufacturing process wastewater after the pressure floating treatment can be treated with high efficiency.
【図１】本発明を実施するために使用する流動床型バイ
オリアクターの例を示す説明図である。FIG. 1 is an explanatory view showing an example of a fluidized bed type bioreactor used for carrying out the present invention.
【図２】本発明と従来法における活性汚泥の汚泥指標
（ＳＶＩ）の経日変化を比較して示す図である。FIG. 2 is a diagram showing a comparison of daily changes in sludge index (SVI) of activated sludge according to the present invention and a conventional method.
【図３】ＳＳを完全に除去した加圧浮上処理後の冷延鋼
板製造工程排水を処理したときの汚泥指標（ＳＶＩ）の
経日変化を示す図である。FIG. 3 is a diagram showing a daily change of a sludge index (SVI) when treating the wastewater of the cold-rolled steel sheet manufacturing process after the pressure floating process in which SS is completely removed.
１ 流動床型バイオリアクター ２ 沈降槽 ３ ＯＲＰ制御器 ４ ｐＨ制御器 ５ ルーツブロワー ６ 原水ポンプ ７ ｐＨ制御用ポンプ ８ ｐＨ制御用ポンプ ９ レーキ １０ ＯＲＰセンサー １１ ｐＨセンサー １２ インバーター 1 Fluidized Bed Bioreactor 2 Settling Tank 3 ORP Controller 4 pH Controller 5 Roots Blower 6 Raw Water Pump 7 pH Control Pump 8 pH Control Pump 9 Rake 10 ORP Sensor 11 pH Sensor 12 Inverter
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 Ｃ０２Ｆ 9/00 ５０２Ｚ ５０３ ５０３Ｇ ５０４ ５０４Ａ ５０４Ｅ // Ｃ０２Ｆ 1/24 ＺＡＢ 1/24 ＺＡＢＢ (72)発明者 前田 和司 君津市君津１番地 新日本製鐵株式会社 君津製鐵所内 (72)発明者 長屋 孝司 君津市君津１番地 新日本製鐵株式会社 君津製鐵所内 (56)参考文献 特開 昭60−25589（ＪＰ，Ａ) 特開 平４−317799（ＪＰ，Ａ) 特開 昭63−42796（ＪＰ，Ａ) 特開 平４−7095（ＪＰ，Ａ) 特開 昭54−152351（ＪＰ，Ａ) 特開 昭52−109754（ＪＰ，Ａ) 特開 平６−493（ＪＰ，Ａ) 特公 昭62−57400（ＪＰ，Ｂ２)Continuation of front page (51) Int.Cl. 6 Identification number Internal reference number FI Technical display location C02F 9/00 502 C02F 9/00 502Z 503 503G 504 504A 504E // C02F 1/24 ZAB 1/24 ZABB (72 Inventor Kaji Maeda 1 Kimitsu, Kimitsu-shi Nippon Steel Corporation Kimitsu Steel Works (72) Inventor Takashi Nagaya 1 Kimitsu, Kimitsu-shi Shin Nippon Steel Co., Ltd. Kimitsu Steel Works (56) References JP-A-60-25589 (JP, A) JP-A-4-317799 (JP, A) JP-A-63-42796 (JP, A) JP-A-4-7095 (JP, A) JP-A-54-152351 (JP , A) JP 52-109754 (JP, A) JP 6-493 (JP, A) JP 62-57400 (JP, B2)
Claims (2)
排水を処理する際、流動床型バイオリアクターにおいて
下水、産業排水を処理する活性汚泥により、あるいはス
ラッジから馴養した微生物により該排水を処理するとと
もに、前記加圧浮上処理する時に生じる高分子凝集剤を
含む懸濁物質（ＳＳ）をバイオリアクターに添加するこ
とにより、該バイオリアクターにおける活性汚泥を凝集
させることを特徴とする加圧浮上処理後の冷延鋼板製造
工程排水の生物学的処理方法。1. When treating wastewater in a cold-rolled steel sheet manufacturing process after pressure floating treatment, the wastewater is treated by activated sludge for treating sewage, industrial wastewater in a fluidized bed bioreactor, or by microorganisms acclimatized from sludge. A pressurized flotation characterized by flocculating the activated sludge in the bioreactor by adding a suspension substance (SS) containing a polymer flocculant generated during the pressure flotation treatment to the bioreactor during the treatment. Biological treatment method of wastewater from cold-rolled steel sheet manufacturing process after treatment.
り、あるいはスラッジから馴養した微生物を、加圧浮上
処理した後の冷延鋼板製造工程排水を処理するよう馴養
する際、流動床型バイオリアクターに供給する曝気空気
量または供給する排水量を調節することにより当該バイ
オリアクターに設置した酸化還元電位（ＯＲＰ）センサ
ーによって検知した電位を制御するとともに、前記冷延
鋼板製造工程排水を加圧浮上処理するときに生じる高分
子凝集剤を含む懸濁物質（ＳＳ）をバイオリアクターに
添加することにより当該バイオリアクターにおける活性
汚泥を凝集させることを特徴とする、加圧浮上処理後の
冷延鋼板製造工程排水の生物学的処理のための微生物の
馴養方法。2. A fluidized bed bioreactor for acclimatizing microorganisms acclimatized with activated sludge for treating sewage, industrial wastewater or from sludge to treat the wastewater from the cold-rolled steel sheet manufacturing process after pressure floating. The potential detected by an oxidation-reduction potential (ORP) sensor installed in the bioreactor is controlled by adjusting the amount of aeration air or the amount of wastewater supplied to the bioreactor, and the wastewater from the cold-rolled steel sheet manufacturing process is subjected to pressure floating treatment. Suspended substance (SS) containing a polymer flocculant sometimes generated is added to a bioreactor to agglomerate activated sludge in the bioreactor, and cold-rolled steel sheet manufacturing process wastewater after pressure floating treatment Method for acclimation of microorganisms for biological treatment of fish.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5023447A JP2693099B2 (en) | 1993-01-20 | 1993-01-20 | Biological treatment method and acclimation method of microorganisms |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5023447A JP2693099B2 (en) | 1993-01-20 | 1993-01-20 | Biological treatment method and acclimation method of microorganisms |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH06210297A JPH06210297A (en) | 1994-08-02 |
| JP2693099B2 true JP2693099B2 (en) | 1997-12-17 |
Family
ID=12110764
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5023447A Expired - Fee Related JP2693099B2 (en) | 1993-01-20 | 1993-01-20 | Biological treatment method and acclimation method of microorganisms |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2693099B2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA2229754C (en) | 1997-02-18 | 2002-04-09 | Canon Kabushiki Kaisha | Method for culturing microorganism, method for biosynthesizing organic compound, method for maintaining microbial ability to decompose polluting substance, method for decomposing pollutant, and method for remedying environment |
| US9446972B2 (en) | 2012-03-07 | 2016-09-20 | Japan Alsi Co., Ltd. | Activated sludge treatment method, and method for upgrading existing waste water treatment equipment using said method |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS52109754A (en) * | 1976-03-10 | 1977-09-14 | Kubota Ltd | Oxidation atmosphere apparatus |
| JPS6017596B2 (en) * | 1978-05-20 | 1985-05-04 | 新日本製鐵株式会社 | Method for suppressing nitrification reaction in aerobic activated sludge treatment |
| JPS6025589A (en) * | 1983-07-22 | 1985-02-08 | Nippon Steel Corp | Biochemical treatment of waste water exhausted from iron and steel plant |
| JPS6257400A (en) * | 1985-09-05 | 1987-03-13 | Nippon Atsudenki Kk | Piezoelectric type headphone |
| JPS6342796A (en) * | 1986-08-06 | 1988-02-23 | Nippon Steel Corp | Continuous activated sludge treatment of sewerage by using blast furnace granulated slag as carrier for immobilizing activated sludge |
| JP2748041B2 (en) * | 1990-04-25 | 1998-05-06 | 新日本製鐵株式会社 | Uniform mixing method of aeration tank in activated sludge treatment |
| JP2562386B2 (en) * | 1991-04-16 | 1996-12-11 | 新日本製鐵株式会社 | Rapid cultivation and growth method for useful microorganisms suitable for wastewater treatment |
-
1993
- 1993-01-20 JP JP5023447A patent/JP2693099B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH06210297A (en) | 1994-08-02 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| KR101665636B1 (en) | Wastewater pretreatment method and sewage treatment method using the pretreatment method | |
| Loukidou et al. | Comparison of two biological treatment processes using attached-growth biomass for sanitary landfill leachate treatment | |
| EP0543457B1 (en) | Method for the treatment of sewage | |
| Tsang et al. | Optimization of biological treatment of paper mill effluent in a sequencing batch reactor | |
| AU2008244181A1 (en) | Method and equipment for processing waste water containing sulphides and ammonium | |
| CN109205954A (en) | Light electrolysis catalysis oxidation, biochemical treatment high-concentration waste hydraulic art | |
| CN114772725A (en) | Device and method for enhancing nitrogen and phosphorus removal of domestic sewage by coupling sulfur autotrophic short-cut denitrification with anaerobic ammonia oxidation | |
| JP2693099B2 (en) | Biological treatment method and acclimation method of microorganisms | |
| KR100327545B1 (en) | Municipal wastewater treatment system | |
| KR100425551B1 (en) | Nitrogen, phosphorus removal method and advanced jet aeration system for advanced sewage or wastewater treatment in SBR process | |
| Hedaoo et al. | Biological wastewater treatment | |
| JP2614580B2 (en) | Wastewater biological treatment method | |
| KR100311587B1 (en) | Batch type apparatus for treating organic wastewater/sewage | |
| JP2618164B2 (en) | Conditioning and propagation of sulfur oxidizing bacteria by addition of inorganic coagulant and biological treatment of wastewater containing reducing sulfur compounds | |
| CN112358042A (en) | Culture method of wastewater treatment denitrification granular sludge | |
| JP3270652B2 (en) | Wastewater nitrogen removal method | |
| JP2582695B2 (en) | Biological treatment method for wastewater containing hydrogen sulfide | |
| JP3134145B2 (en) | Wastewater biological denitrification method | |
| JP2509099B2 (en) | Method for acclimatizing and growing microorganisms that oxidatively decompose reducing sulfur compounds, and method for biological treatment of wastewater containing reducing sulfur compounds | |
| JPH06206086A (en) | Biological treatment of waste liquid and acclimation of microorganism | |
| JPH05277475A (en) | Treatment method for water containing organic substance | |
| JPH0661552B2 (en) | Organic wastewater treatment method | |
| KR100449945B1 (en) | Nitrogen (N), phosphorus (P) removal method of advanced treatment of sewage or wastewater in SBR method and sludge reduction device | |
| KR100302895B1 (en) | Advanced wastewater treatment system | |
| WO2007050775A1 (en) | System and method for treating wastewater and a growth supporting media usable therein |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A01 | Written decision to grant a patent or to grant a registration (utility model) |
Free format text: JAPANESE INTERMEDIATE CODE: A01 Effective date: 19970729 |
|
| S111 | Request for change of ownership or part of ownership |
Free format text: JAPANESE INTERMEDIATE CODE: R313122 |
|
| R371 | Transfer withdrawn |
Free format text: JAPANESE INTERMEDIATE CODE: R371 |
|
| S111 | Request for change of ownership or part of ownership |
Free format text: JAPANESE INTERMEDIATE CODE: R313121 |
|
| R350 | Written notification of registration of transfer |
Free format text: JAPANESE INTERMEDIATE CODE: R350 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20070905 Year of fee payment: 10 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20080905 Year of fee payment: 11 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20090905 Year of fee payment: 12 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20100905 Year of fee payment: 13 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20100905 Year of fee payment: 13 |
|
| S531 | Written request for registration of change of domicile |
Free format text: JAPANESE INTERMEDIATE CODE: R313531 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20110905 Year of fee payment: 14 |
|
| R350 | Written notification of registration of transfer |
Free format text: JAPANESE INTERMEDIATE CODE: R350 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20110905 Year of fee payment: 14 |
|
| S111 | Request for change of ownership or part of ownership |
Free format text: JAPANESE INTERMEDIATE CODE: R313117 |
|
| R350 | Written notification of registration of transfer |
Free format text: JAPANESE INTERMEDIATE CODE: R350 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20110905 Year of fee payment: 14 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20120905 Year of fee payment: 15 |
|
| LAPS | Cancellation because of no payment of annual fees |