JPH0671286A - Agent and method for preventive bulking - Google Patents

Agent and method for preventive bulking

Info

Publication number
JPH0671286A
JPH0671286A JP4251956A JP25195692A JPH0671286A JP H0671286 A JPH0671286 A JP H0671286A JP 4251956 A JP4251956 A JP 4251956A JP 25195692 A JP25195692 A JP 25195692A JP H0671286 A JPH0671286 A JP H0671286A
Authority
JP
Japan
Prior art keywords
bulking
agent
bactericide
amount
cationic
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.)
Granted
Application number
JP4251956A
Other languages
Japanese (ja)
Other versions
JP2901819B2 (en
Inventor
Ichiro Yamamoto
一郎 山本
Toyoichi Yokomaku
豊一 横幕
Shuichi Kojima
修一 小島
Shoichi Hirata
正一 平田
Takanori Someoka
孝宣 染岡
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.)
Kankyo Engineering Co Ltd
Original Assignee
Kankyo Engineering Co Ltd
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
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Application filed by Kankyo Engineering Co Ltd filed Critical Kankyo Engineering Co Ltd
Priority to JP4251956A priority Critical patent/JP2901819B2/en
Publication of JPH0671286A publication Critical patent/JPH0671286A/en
Application granted granted Critical
Publication of JP2901819B2 publication Critical patent/JP2901819B2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02WCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W10/00Technologies for wastewater treatment
    • Y02W10/10Biological treatment of water, waste water, or sewage

Landscapes

  • Separation Of Suspended Particles By Flocculating Agents (AREA)
  • Activated Sludge Processes (AREA)

Abstract

PURPOSE:To easily and quickly prevent filiform bulking by combinedly using a small amount of flocculant and bactericide. CONSTITUTION:The bulking preventive agent for waste water treatment consists of the mixture of the chemicals (bactericide or antimicrobial agent) having sterilizing or bacteriostatic effect for the filiform micro-organism causing bulking and a cationic org. flocculant, and the chemical (bactericide or antimicrobial agent) having sterilizing or bacteriostatic effect for the filiform micro-organism causing bulking and a cationic org. flocculant are used in common for the waste water which causes or has caused bulking.

Description

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

【0001】[0001]

【産業上の利用分野】本発明はバルキング防止剤及びバ
ルキング防止方法に関し、更に詳しくは、殺菌剤或は抗
菌剤とカチオン性の有機凝集剤からなるバルキング防止
剤及び該防止剤を用いるバルキング防止方法に関する。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bulking inhibitor and a bulking inhibitor, and more particularly, a bulking inhibitor comprising a bactericide or antibacterial agent and a cationic organic flocculant, and a bulking inhibitor using the inhibitor. Regarding

【0002】[0002]

【従来の技術及びその問題点】[Prior art and its problems]

(1) 従来から活性汚泥処理におけるバルキングの抑制方
法として殺菌剤又は抗菌剤を使用する方法が実施されて
いるが、効果の発現が不明確であった。又、抗菌剤の添
加濃度の許容幅が狭く、不足すると全く効果が認められ
ず、逆に少し多くなると有用な活性汚泥微生物を死滅或
は活性度の低下等、排水処理への悪影響が認められた。 (2)カチオン性有機凝集剤によるバルキングの解消も試
みられていたが、これはあくまで凝集剤としての使用で
あり、活性汚泥を凝集させることによって、沈澱槽での
沈降性を改善するだけの効果であり、応急処置的な用途
に限られていた。
(1) Conventionally, a method of using a bactericide or an antibacterial agent has been carried out as a method for suppressing bulking in activated sludge treatment, but the manifestation of the effect was unclear. In addition, if the allowable range of the concentration of the antibacterial agent is narrow and insufficient, no effect is observed, and conversely, if the amount is slightly increased, useful activated sludge microorganisms are killed or the activity is reduced, and other adverse effects on wastewater treatment are recognized. It was (2) Attempts have also been made to eliminate bulking by using a cationic organic coagulant, but this is only to be used as a coagulant, and the effect of just improving the sedimentation property in the sedimentation tank by aggregating the activated sludge. And was limited to first aid applications.

【0003】凝集剤を活性汚泥の曝気槽に投入した場
合、短期的には活性汚泥の沈降性を確保出来るが、曝気
等の機械的な力による凝集フロックの破壊、微生物によ
る分解、或は排水中の物質との反応による不活性化等に
よって凝集剤の効果が失われることになる。通常、長く
ても1〜3日で凝集剤による沈降性の改善効果は消失
し、元のバルキング状態に戻ってしまうことになる。こ
の為、凝集剤によってバルキング対策をするには、連続
的或は定期的・継続的な凝集剤の添加が必要になる。こ
れは、経済的な問題もさることながら、凝集剤が活性汚
泥中に残留し、処理水質の悪化等水処理性能に影響を与
え、凝集剤そのものの効果も低下し、添加量を増加する
ことになり、悪循環に陥ることになる。従って本発明の
目的は、上記従来技術の問題点を解決し、少量の凝集剤
及び少量の殺菌剤を併用することで、容易且つ迅速に糸
状性バルキングを防止することが出来るバルキング防止
剤及びバルキング防止方法を提供することである。
When a flocculant is added to the aeration tank of activated sludge, the sedimentation of activated sludge can be secured in the short term, but the floc of flocs is destroyed by mechanical force such as aeration, decomposition by microorganisms, or drainage. The effect of the flocculant is lost due to inactivation due to the reaction with the substance inside. Usually, the effect of improving the sedimentation property due to the aggregating agent disappears within 1 to 3 days at the longest, and the original bulking state is restored. Therefore, in order to prevent the bulking with the coagulant, it is necessary to add the coagulant continuously or periodically. This is because the coagulant remains in the activated sludge, which affects the water treatment performance such as deterioration of the quality of the treated water, reduces the effect of the coagulant itself, and increases the amount added, in addition to economic problems. It becomes a vicious circle. Therefore, an object of the present invention is to solve the above-mentioned problems of the prior art, and by using a small amount of a coagulant and a small amount of a bactericide together, it is possible to easily and quickly prevent filamentous bulking and a bulking inhibitor and a bulking agent. It is to provide a prevention method.

【0004】[0004]

【課題を解決する為の手段】上記目的は以下の本発明に
よって達成される。即ち、本発明は、バルキングの原因
となる糸状性微生物に対し殺菌或は静菌効果のある薬剤
(殺菌剤或は抗菌剤)とカチオン性の有機凝集剤との混
合物からなることを特徴とする排水処理におけるバルキ
ング防止剤、及びバルキングが生じる又は生じた排水に
対して、バルキングの原因となる糸状性微生物に対し殺
菌或は静菌効果のある薬剤(殺菌剤或は抗菌剤)とカチ
オン性の有機凝集剤とを併用することを特徴とする排水
処理におけるバルキングの防止方法である。
The above object can be achieved by the present invention described below. That is, the present invention is characterized by comprising a mixture of a chemical agent (bactericidal agent or antibacterial agent) having a bactericidal or bacteriostatic effect against filamentous microorganisms causing bulking and a cationic organic flocculant. Anti-bulking agent in wastewater treatment, and a chemical (bactericidal agent or antibacterial agent) that has a bactericidal or bacteriostatic effect on filamentous microorganisms that cause bulking against the wastewater that causes bulking A method for preventing bulking in wastewater treatment, which is characterized by using an organic coagulant together.

【0005】[0005]

【作用】バルキングの原因となる糸状性微生物に対し殺
菌或は静菌効果のある薬剤(殺菌剤或は抗菌剤)とカチ
オン性の有機凝集剤とを適正量で併用することによっ
て、夫々の使用量が少量であっても容易且つ迅速に糸状
性バルキングの発生を防止することが出来る。
[Function] Each agent is used by combining an agent (bactericidal agent or antibacterial agent) having a bactericidal or bacteriostatic effect against filamentous microorganisms causing bulking with a cationic organic flocculant in an appropriate amount. Even if the amount is small, the occurrence of filamentous bulking can be easily and quickly prevented.

【0006】[0006]

【好ましい実施態様】次に好ましい実施態様を挙げて本
発明を更に詳しく説明する。本発明のバルキング防止剤
が有効に作用する糸状性細菌或は真菌類等の糸状性の微
生物としては、例えば、糸状性細菌として、Nostocoida
limicola、 Nocardia SP、 Type 0041、 Microthrix parv
icella、 Thiothrix、Beggiatoa SP、 Sphaerotilus natan
s、 Type1701、 Type1702、 Type0411、Type1863、 Type080
3、 Type0961、Type021N 等が挙げられ、真菌類として
は、Saprolegnia ferax、 Leptomitus lacreus、 Mucor f
ragilis、 Geotrichum candidum 等が挙げられる。
BEST MODE FOR CARRYING OUT THE INVENTION The present invention will be described in more detail with reference to the preferred embodiments. Examples of filamentous microorganisms such as filamentous bacteria or fungi on which the anti-bulking agent of the present invention effectively acts include Nostocoida filamentous bacteria.
limicola, Nocardia SP, Type 0041, Microthrix parv
icella, Thiothrix, Beggiatoa SP, Sphaerotilus natan
s, Type1701, Type1702, Type0411, Type1863, Type080
3, Type0961, Type021N, etc., and fungi include Saprolegnia ferax, Leptomitus lacreus, Mucor f
ragilis, Geotrichum candidum and so on.

【0007】本発明のバルキング防止剤及びバルキング
防止方法で使用される殺菌剤或は抗菌剤の種類として
は、下記の如き薬剤が挙げられる。 (1) サラシ粉、高度サラシ粉、次亜塩素酸塩、二酸化塩
素、クロラミンT、トリクロロイソシアヌール酸等の塩
素系殺菌剤。 (2) 過酸化水素、過炭酸ナトリウム、過酸化ピロリン酸
ソーダ等の過酸化物。 (3) クロルヘキシジン塩、ポリアルキレンビグアニジン
塩、ドデシルグアニジン塩等のグアニジン誘導体。 (4) ホルマリン、グリオキザール、グルタルアルデヒド
等のアルデヒド系化合物。 (5) 塩化ベンザルコニウム、塩化ベンゼトニウム、アル
キルトリメチルアンモニウム塩等の陽イオン界面活性
剤。 (6) アルキルジ(アミノエチル)グリシン塩酸塩、ジ
(アルキルアミノジエチル)グリシン塩酸塩等の両性界
面活性剤。 (7) ジアルキルアミンと場合によりアンモニア(ジアル
キルアミンと等モル以下)とエピハロヒドリンとの反応
によって得られる水溶性カチオン重合体。 (上記化合物は、低分子量(分子量:数千程度以下)で
は比較的強い抗菌作用を持ち、分子量1万以上のもの
は、従来カチオン性有機凝集剤として使用されている。
本発明においても、分子量数千以下の低分子量のものと
1万以上の高分子量のものを併用することで、本発明の
目的とするバルキング防止剤としての相乗効果を発揮せ
しめることが出来る。)
The types of antibacterial agents or antibacterial agents used in the anti-bulking agent and the anti-bulking method of the present invention include the following agents. (1) Chlorine-based germicides such as coconut powder, high-grade coconut powder, hypochlorite, chlorine dioxide, chloramine T, and trichloroisocyanuric acid. (2) Peroxides such as hydrogen peroxide, sodium percarbonate and sodium pyrophosphate pyrophosphate. (3) Guanidine derivatives such as chlorhexidine salt, polyalkylene biguanidine salt and dodecyl guanidine salt. (4) Aldehyde compounds such as formalin, glyoxal, and glutaraldehyde. (5) Cationic surfactants such as benzalkonium chloride, benzethonium chloride and alkyl trimethyl ammonium salts. (6) Amphoteric surfactants such as alkyldi (aminoethyl) glycine hydrochloride and di (alkylaminodiethyl) glycine hydrochloride. (7) A water-soluble cationic polymer obtained by the reaction of dialkylamine and optionally ammonia (equimolar or less with dialkylamine) and epihalohydrin. (The above compounds have a relatively strong antibacterial action at a low molecular weight (molecular weight: about several thousand or less), and those having a molecular weight of 10,000 or more have been conventionally used as a cationic organic coagulant.
Also in the present invention, by using a low molecular weight compound having a molecular weight of several thousand or less and a high molecular weight compound having a molecular weight of 10,000 or more in combination, the synergistic effect as a bulking inhibitor, which is the object of the present invention, can be exhibited. )

【0008】(8) フェノール、レゾルシン、フェノール
ハロゲン化合物、クレゾール、キシレノール、ジフェニ
ール化合物等のフェノール系化合物。 (9) メチレンジチオシアネート、ジメチルジチオカルバ
ミン酸塩、5-クロル-2-メチル-4-イソチアゾリン-3-オ
ン、2-メチル-4-イソチアゾリン-3-オン等の有機窒素硫
黄系化合物。 (10)2,2-ジブロム-2'-クロルアセトフェノン、2,2-ジブ
ロムアセトフェノン、ブロムメチルロダネート、ジブロ
ムニトロソプロピオアミド、2-ヘプタデシル-1-エチル
エタノールイミダゾリウムブロミド、2,2-ジブロム-3-
ニトリロプロピオアミド等の有機ブロム系化合物。 (11)ソルビン酸カリ等のソルビン酸塩 以上の如き殺菌剤又は抗菌剤は単独で使用しても、複数
種類を併用してもよい。バルキングの原因となる糸状性
微生物の種類によっては複数の殺菌剤又は抗菌剤を併用
することがより高い効果を発現する。又、発生している
糸状性微生物の種類が複数である場合には、殺菌剤又は
抗菌剤も複数の種類使用する方が効果的である。上記殺
菌剤又は抗菌剤の添加量は、特に限定するものではない
が、発生している糸状性微生物(バルキング原因微生
物)の最小発育阻止濃度(MIC)から最少殺菌濃度
(MCC)の5倍量に相当する濃度の間になる濃度を選
択すると効果的である。MIC以下の濃度では、本発明
の目的が達成されない場合がある。MCCの5倍量以上
の濃度を選択するとバルキングの原因となる糸状性微生
物の駆逐効果は高くなるが、同時に他の有用な活性汚泥
微生物にも悪影響を与え、処理水質の悪化を来すことに
なる。
(8) Phenolic compounds such as phenol, resorcin, phenol halogen compound, cresol, xylenol and diphenyl compound. (9) Organic nitrogen-sulfur compounds such as methylenedithiocyanate, dimethyldithiocarbamate, 5-chloro-2-methyl-4-isothiazolin-3-one and 2-methyl-4-isothiazolin-3-one. (10) 2,2-dibromo-2'-chloroacetophenone, 2,2-dibromoacetophenone, brommethylrodanate, dibromonitrosopropioamide, 2-heptadecyl-1-ethylethanolimidazolium bromide, 2,2 -Dibrom-3-
Organic brominated compounds such as nitrilopropioamide. (11) Sorbates such as potassium sorbate The above-mentioned bactericides or antibacterial agents may be used alone or in combination of two or more kinds. Depending on the type of filamentous microorganisms that cause bulking, the combined use of a plurality of fungicides or antibacterial agents produces a higher effect. Further, when there are a plurality of types of filamentous microorganisms generated, it is more effective to use a plurality of types of fungicides or antibacterial agents. The addition amount of the above-mentioned bactericidal agent or antibacterial agent is not particularly limited, but it is 5 times the minimum inhibitory concentration (MIC) to the minimum bactericidal concentration (MCC) of the filamentous microorganism (bulking-causing microorganism) that is occurring. It is effective to select the concentration between the concentrations corresponding to. At a concentration below the MIC, the object of the present invention may not be achieved. Choosing a concentration more than 5 times the amount of MCC enhances the effect of exterminating filamentous microorganisms that cause bulking, but at the same time adversely affects other useful activated sludge microorganisms, resulting in deterioration of treated water quality. Become.

【0009】本発明においてはカチオン性有機凝集剤に
よる活性汚泥の凝集効果が高く、機械的に強いフロッッ
クを作ることによって、殺菌剤又は抗菌剤の添加濃度を
低くすることが可能となる。又、殺菌剤又は抗菌剤の濃
度がMCC以上の値になってもカチオン性有機凝集剤を
併用することで本発明の目的である有用な活性汚泥微生
物への殺菌剤又は抗菌剤の影響を和らげ、糸状性微生物
のみに強い殺菌或は抗菌作用を発現する事になり、この
結果バルキング現象を解消すると共に、処理水質の悪化
することを防ぐことが出来る。バルキング原因微生物の
単離が困難で、MIC或はMCCの測定が出来ない場合
には、対象となる糸状性微生物がグラム陰性の細菌類で
あれば代表菌種としてSphaerotilus natansのMIC・
MCC値を、グラム陽性の糸状性細菌であればNocardia
SPのMIC・MCC値を、真菌類であればGeotrichum
candidumのMIC・MCC値を代表値として使用する
ことで大きな誤差を生ずることなく添加量を算定するこ
とが出来る。
In the present invention, the flocculating effect of the activated sludge by the cationic organic flocculant is high, and by forming a mechanically strong floc, it is possible to reduce the concentration of the bactericide or antibacterial agent added. Further, even if the concentration of the bactericide or the antibacterial agent becomes a value of MCC or more, the effect of the bactericide or the antibacterial agent on the useful activated sludge microorganism, which is the object of the present invention, is softened by using the cationic organic coagulant together As a result, a strong bactericidal or antibacterial action is exerted only on filamentous microorganisms. As a result, the bulking phenomenon can be eliminated and the quality of treated water can be prevented from deteriorating. When isolation of the bulking causative microorganism is difficult and MIC or MCC cannot be measured, if the target filamentous microorganism is a Gram-negative bacterium, MIC of Sphaerotilus natans
MCC value is Nocardia for Gram-positive filamentous bacteria
MIC / MCC value of SP is Geotrichum for fungi
By using the candidum MIC / MCC values as representative values, the addition amount can be calculated without causing a large error.

【0010】本発明において使用する主なカチオン性有
機凝集剤の種類を後記の表に示すが本発明は必ずしもこ
れらのものに限定されるものではなく、活性汚泥中に添
加して凝集フロッックを作るものであれば、これ以外の
構造のものでもよい。又、使用する種類は単一でも複数
でもよく、対象となる活性汚泥に応じて出来るだけ強い
凝集フロッックを形成することが出来る条件を選定する
ことが好ましい。カチオン性凝集剤の使用量としては、
凝集フロッックを生成する量を注入すればよい。更に好
ましくは、強固で、機械的な力によってフロッックが壊
れにくい状態になる注入量とする。フロッックの大きさ
は問題ではなく、壊れにくいことが重要である。通常、
乾燥汚泥量に対して0. 01重量%以上の添加量でよ
く、更に好ましくは0. 08〜4. 0重量%の範囲がよ
い。殺菌剤又は抗菌剤とカチオン性有機凝集剤の添加の
タイミングとしては、通常、殺菌剤又は抗菌剤を先に添
加するか、凝集剤と同時に添加する。但し、凝集剤を先
に添加しても本発明の目的は達成される。別々に添加す
る場合には、両者の添加間隔をあまり大きくとることは
好ましくなく、通常24時間以内に行う。殺菌剤又は抗
菌剤或はカチオン性有機凝集剤はそれぞれ単一種類のも
のを用いてもよいし、複数で用いてもよい。バルキング
の原因になっている糸状性微生物の種類或は糸状性微生
物が複数の種類にわたっている場合或は活性汚泥の性状
によっては複数の種類の殺菌剤又は抗菌剤及び/又はカ
チオン性凝集剤を用いる方が効果的な場合がある。
The types of main cationic organic flocculants used in the present invention are shown in the table below, but the present invention is not necessarily limited to these, and it is added to activated sludge to produce floc flocs. Any other structure may be used. Further, the type to be used may be single or plural, and it is preferable to select the conditions capable of forming the cohesive flocks as strong as possible according to the target activated sludge. As the amount of the cationic flocculant used,
It suffices to inject an amount that produces aggregate flocks. More preferably, the injection amount is strong and makes the flocks hard to break by mechanical force. The size of the flocks does not matter, it is important that they are not easily broken. Normal,
The amount added may be 0.01% by weight or more, and more preferably 0.08 to 4.0% by weight, based on the amount of dried sludge. Regarding the timing of addition of the bactericidal agent or antibacterial agent and the cationic organic coagulant, the bactericidal agent or antibacterial agent is usually added first or simultaneously with the coagulant. However, the object of the present invention can be achieved even if the aggregating agent is added first. When they are added separately, it is not preferable to set the addition intervals of the both too large, and the addition is usually performed within 24 hours. As the bactericidal agent, antibacterial agent or cationic organic coagulant, a single type may be used, or a plurality of types may be used. Multiple types of fungicides or antibacterial agents and / or cationic flocculants are used depending on the type of filamentous microorganisms causing the bulking, or if there are multiple types of filamentous microorganisms or depending on the properties of activated sludge. May be more effective.

【0011】上記本発明のバルキング防止剤の添加箇所
及び添加方法は下記の如くである。 (1) 殺菌剤又は抗菌剤及びカチオン性有機凝集剤は、原
体そのまま(粉末又は液状を問わない)或は水溶液で使
用する。又、殺菌剤又は抗菌剤とカチオン性有機凝集剤
を個々単独或は事前に混合しておいて使用してもよい。
又、これらの有効成分の分散或は溶解性を向上させる目
的で、硫酸ソーダ、重炭酸ソーダ等の水溶性無機塩或は
珪藻土粉、ゼオライト粉末、界面活性剤、湿潤剤等を併
用或は混合使用してもよい。 (2) 処理対象となる活性汚泥設備に添加する順序は、通
常は殺菌剤又は抗菌剤とカチオン系有機凝集剤とを同時
に添加するか、先ず殺菌剤又は抗菌剤を添加し、次にカ
チオン系有機凝集剤を添加する場合が多く、バルキング
抑制効果もよい。しかし、添加順序を逆にしても又は同
時に添加しても本発明の目的を達成することが出来る。
又、薬剤を別々に添加する場合は24時間以内に全ての
薬剤の添加を完了することが好ましい。
The locations and methods for adding the bulking inhibitor of the present invention are as follows. (1) The bactericide or antibacterial agent and the cationic organic coagulant are used as the raw material (whether powder or liquid) or in an aqueous solution. Further, the bactericidal agent or antibacterial agent and the cationic organic coagulant may be used individually or in a mixture in advance.
For the purpose of improving the dispersion or solubility of these active ingredients, water-soluble inorganic salts such as sodium sulfate and sodium bicarbonate or diatomaceous earth powder, zeolite powder, surfactants, wetting agents, etc. may be used in combination or mixed. May be. (2) The order of addition to the activated sludge equipment to be treated is usually the simultaneous addition of a bactericide or antibacterial agent and a cationic organic coagulant, or first a bactericide or antibacterial agent, and then a cationic system. In many cases, an organic coagulant is added, and the effect of suppressing bulking is also good. However, the object of the present invention can be achieved by reversing the order of addition or simultaneously adding.
Further, when the drugs are added separately, it is preferable to complete the addition of all the drugs within 24 hours.

【0012】以上は、主に既にバルキング状態になった
活性汚泥設備に本発明のバルキング防止剤及びバルキン
グ防止方法を適用する場合について述べたものである
が、正常に運転されている活性汚泥設備に本発明の方法
を適用する事で、糸状性微生物の増殖を抑制し、バルキ
ング状態になることを未然に防止することも可能であ
る。バルキング防止剤を添加する場所としては、曝気槽
への直接添加、返送汚泥への添加が一般的であり、効果
が高いが、流入する排水への混合、沈殿槽への添加等、
いずれの箇所であってもよい。又、その他の凝集剤、例
えば、ポリ塩化アルミニウム、硫酸バンド、塩化第2
鉄、塩化第1鉄、ポリ硫酸鉄等の無機凝集剤、或はポリ
アクリル酸ソーダ、アクリクアミド−アクリル酸ソーダ
共重合物、ポリスルホメチル化ポリアクリルアミド、ポ
リアクリルアミド部分加水分解物、ポリアクリルアミ
ド、ポリエチレンオキサイド等のアニオン性或はノニオ
ン性の高分子凝集剤の併用も、強固な凝集フロッックを
作る為に有効であれば、本発明の目的を達成するのに有
益であり、併用することが出来る。添加量は、通常、乾
燥汚泥量に対して0. 003重量%以上の添加量でよ
く、更に好ましくは0. 05〜2. 0重量%の範囲がよ
い。使用するタイミングは、本発明を実施するのと同
時、或は前後であり、特に限定するものではないが、活
性汚泥の性状によって最適なタイミングは異なる。但
し、本発明を実施するのには、時間的に近い方がよく、
本発明の実施の前後10時間以内に添加する。
The above is a description of the case where the bulking inhibitor and the bulking prevention method of the present invention are mainly applied to activated sludge equipment which has already been in a bulking state. By applying the method of the present invention, it is possible to suppress the growth of filamentous microorganisms and prevent the bulking state. As a place to add the bulking inhibitor, it is generally added directly to the aeration tank or added to the returned sludge, and the effect is high, but mixing to the inflowing wastewater, addition to the sedimentation tank, etc.
It may be at any place. Also, other coagulants such as polyaluminum chloride, sulfuric acid band, secondary chloride
Inorganic flocculants such as iron, ferrous chloride, and polyiron sulfate, or sodium polyacrylate, acrylamide-sodium acrylate copolymer, polysulfomethylated polyacrylamide, polyacrylamide partial hydrolyzate, polyacrylamide, polyethylene A combination of anionic or nonionic polymer flocculants such as oxides is also useful for achieving the object of the present invention and can be used in combination if they are effective for producing a strong flocculation floc. The amount added is usually 0.003% by weight or more based on the amount of dry sludge, and more preferably in the range of 0.05 to 2.0% by weight. The timing of use is the same as, or before or after carrying out the present invention, and is not particularly limited, but the optimum timing differs depending on the properties of the activated sludge. However, in order to carry out the present invention, it is better to be close in time,
Add within 10 hours before and after practicing the present invention.

【0013】[0013]

【実施例】次に実施例及び比較例を挙げて本発明を更に
具体的に説明する。グルコース720mg/L、スターチ4
00mg/L、ペプトン320mg/L、酵母エキス20mg/L、
尿素16mg/L及び燐酸1カリ40mg/Lからなる合成排水
を調製した。この合成排水のpHは8. 1、TOCは8
50mg/L、CODは820mg/L、BODは1, 000mg
/Lであり、糸状性細菌としてS. natans、 TypeO21N、 Tyo
pe1701、 Type0041等が非常に発生し易い組成である。次
に実験用排水処理装置を組み立て、この装置と上記の合
成排水を用いて活性汚泥の培養を行うと共に沈澱槽にお
けるSVIを求めた。この方法によりBOD負荷0. 4
kg/m3・日、SRT15日の条件を用いて運転を行っ
たところ、上記の各種類の糸状性細菌が発生し増殖に従
って活性汚泥のSVIは初期値110から20日後で4
50となった。以上の結果は非常に再現性に優れている
ので、本発明のバルキング抑制剤を用いて上記操作を繰
り返して本発明のバルキング抑制方法を以下の様に実施
した。上記方法によって活性汚泥を培養し、SVIが4
00を超えた時点で本発明の方法を実施した結果及び比
較例を以下に示す。
EXAMPLES Next, the present invention will be described more specifically with reference to Examples and Comparative Examples. Glucose 720mg / L, starch 4
00 mg / L, peptone 320 mg / L, yeast extract 20 mg / L,
A synthetic wastewater consisting of 16 mg / L urea and 40 mg / L potassium phosphate was prepared. The pH of this synthetic wastewater is 8.1 and the TOC is 8.
50mg / L, COD is 820mg / L, BOD is 1,000mg
/ L, and as filamentous bacteria S. natans, TypeO21N, Tyo
It is a composition in which pe1701, Type0041, etc. are very likely to occur. Next, an experimental wastewater treatment device was assembled, and using this device and the above-mentioned synthetic wastewater, activated sludge was cultured and the SVI in the settling tank was determined. BOD load 0.4 by this method
When the operation was performed under the conditions of kg / m 3 · day and SRT 15 days, the above-mentioned filamentous bacteria of each type were generated and the SVI of the activated sludge increased from 110 to 20 days after the initial value according to the growth.
It became 50. Since the above results are extremely reproducible, the above-mentioned operation was repeated using the bulking inhibitor of the present invention to carry out the bulking inhibition method of the present invention as follows. The activated sludge was cultivated by the above method and the SVI was 4
The results and comparative examples of carrying out the method of the present invention when the time exceeds 00 are shown below.

【0014】[0014]

【表1】 殺菌剤又は抗菌剤:次亜塩素酸ナトリウム水溶液(Na
OCl 5W/W%液) カチオン性有機凝集剤:ポリメタアクリル酸エステル系
の強カチオン性凝集剤(分子量約350万、顆粒状)。 添加方法:各々を上記有り姿のまま曝気槽へ所定量を同
時に添加した。 (注)添加量はいずれも溶液或は粉末の有り姿での添加
量(mg/L)を示した。
[Table 1] Fungicide or antibacterial agent: sodium hypochlorite aqueous solution (Na
OCl 5W / W% liquid) Cationic organic coagulant: Polymethacrylic acid ester-based strong cationic coagulant (molecular weight: about 3.5 million, granular). Addition method: A predetermined amount of each of them was simultaneously added to the aeration tank as it was. (Note) The addition amount is the amount (mg / L) in the form of solution or powder.

【0015】[0015]

【表2】 殺菌剤又は抗菌剤:1,6-ジ(N-p-クロロフェニルビグア
ナイド)ヘキサジングルコネート水溶液(20W/W%) カチオン性有機凝集剤:ポリメタアクリル酸エステル系
の強カチオン性凝集剤(90W/W%粉末、分子量約35
0万) 添加方法:各々を上記有り姿のまま曝気槽へ所定量を同
時に添加した。 (注)添加量はいずれも溶液或は粉末の有り姿での添加
量(mg/L)を示した。
[Table 2] Bactericide or antibacterial agent: 1,6-di (Np-chlorophenyl biguanide) hexazine gluconate aqueous solution (20 W / W%) Cationic organic coagulant: polymethacrylic acid ester type strong cationic coagulant (90W / W% powder, molecular weight about 35
0,000) Addition method: A predetermined amount of each of them was simultaneously added to the aeration tank as it was. (Note) The addition amount is the amount (mg / L) in the form of solution or powder.

【0016】[0016]

【表3】 殺菌剤又は抗菌剤:グルタラール,1,5-ペンタンジアー
ル水溶液(C58 2 20W/W%) カチオン性有機凝集剤:ポリアクリルアミドにホルマリ
ンとジメチルアミンを作用させた強カチオン性変性物
(85W/W%粉末) 添加方法:各々を上記有り姿のまま曝気槽へ所定量を同
時に添加した。 (注)添加量はいずれも溶液或は粉末の有り姿での添加
量(mg/L)を示した。
[Table 3] Bactericide or antibacterial agent: Glutaral, 1,5-pentanedial aqueous solution (C 5 H 8 O 2 20 W / W%) Cationic organic coagulant: Polyacrylamide with formalin and dimethylamine Cationic modified product (85 W / W% powder) Addition method: A predetermined amount of each of them was simultaneously added to the aeration tank as it was. (Note) The addition amount is the amount (mg / L) in the form of solution or powder.

【0016】[0016]

【表4】 殺菌剤又は抗菌剤:ベンジルジメチルアンモニウムクロ
ライド水溶液(10W/W%水溶液) カチオン性有機凝集剤:ポリビニルピリジュウムクロラ
イド(90W/W%粉末、分子量約200万) 添加方法:各々を上記有り姿のまま曝気槽へ所定量を同
時に添加した。 (注)添加量はいずれも溶液或は粉末の有り姿での添加
量(mg/L)を示した。
[Table 4] Bactericide or antibacterial agent: benzyldimethylammonium chloride aqueous solution (10 W / W% aqueous solution) Cationic organic flocculant: polyvinylpyridium chloride (90 W / W% powder, molecular weight of about 2 million) Addition method: Each of the above A predetermined amount was simultaneously added to the aeration tank as it was. (Note) The addition amount is the amount (mg / L) in the form of solution or powder.

【0017】[0017]

【表5】 殺菌剤又は抗菌剤:アルキルジ(アミノエチル)グリシ
ン塩酸塩水溶液(C1842CL N32 30W/W%液) カチオン性有機凝集剤:ポリアクリル酸エステル系の強
カチオン性凝集剤(85W/W%粉末、分子量約200
万) 添加方法:各々を上記有り姿のまま曝気槽へ所定量を同
時に添加した。 (注)添加量はいずれも溶液或は粉末の有り姿での添加
量(mg/L)を示した。
TABLE 5 disinfectant or antibacterial agents: alkyl di (aminoethyl) glycine hydrochloride solution (C 18 H 42 CL N 3 O 2 30W / W% liquid) cationic organic flocculants: polyacrylate strong cationic Flocculant (85W / W% powder, molecular weight about 200
10,000) Addition method: A predetermined amount of each of them was simultaneously added to the aeration tank as it was. (Note) The addition amount is the amount (mg / L) in the form of solution or powder.

【0018】[0018]

【表6】 殺菌剤又は抗菌剤:ジメチルアミンとエピクロロヒドリ
ンとから得られるカチオン性ポリマーの水溶液(不揮発
成分57W/W%液、分子量約0. 5万) カチオン性有機凝集剤:ジメチルアミンとエピクロロヒ
ドリンとから得られるカチオン性ポリマーの水溶液(不
揮発成分59W/W%液、分子量約25万) 添加方法:各々の溶液を曝気槽へ所定量を同時に添加し
た。 (注)添加量はいずれも溶液或は粉末の有り姿での添加
量(mg/L)を示した。
[Table 6] Bactericide or antibacterial agent: aqueous solution of a cationic polymer obtained from dimethylamine and epichlorohydrin (nonvolatile component 57 W / W% liquid, molecular weight about 050,000) Cationic organic coagulant: dimethylamine Aqueous solution of cationic polymer obtained from and epichlorohydrin (nonvolatile component 59 W / W% liquid, molecular weight about 250,000) Addition method: A predetermined amount of each solution was simultaneously added to the aeration tank. (Note) The addition amount is the amount (mg / L) in the form of solution or powder.

【0019】[0019]

【表7】 殺菌剤又は抗菌剤:フェノール水溶液(C66 O 2
0W/W 重量%液) カチオン性有機凝集剤:ポリメタアクリル酸エステル系
の強カチオン性凝集剤(90W/W 重量%粉末、分子量約
350万) 添加方法:各々を上記の有り姿で曝気槽へ所定量を同時
に添加した。
[Table 7] Bactericide or antibacterial agent: aqueous phenol solution (C 6 H 6 O 2
0 W / W wt% liquid) Cationic organic coagulant: Polymethacrylic acid ester-based strong cationic coagulant (90 W / W wt% powder, molecular weight of about 3.5 million) Addition method: Aeration tank with each as above A predetermined amount was simultaneously added to.

【0020】[0020]

【発明の効果】本発明の効果は、バルキングの原因とな
っている糸状性微生物を殺す又は増殖を抑制することが
出来る為、バルキングの抑制効果の発現が明確で、且つ
確実である。又、1回の処置で1ヶ月以上にわたって糸
状性微生物の発生を抑制する事ができる。添加する殺菌
剤又は抗菌剤の濃度選択幅が広くなり、小量で効果の発
現が認められ、逆にMCC値を超える濃度を添加した場
合においても有用な活性汚泥微生物への悪影響が少なく
なる。この結果、添加量の制御が飛躍的に容易になる。
EFFECTS OF THE INVENTION The effect of the present invention is clear and reliable because the effect of inhibiting bulking is clear because it can kill or inhibit the growth of filamentous microorganisms that cause bulking. Further, it is possible to suppress the generation of filamentous microorganisms for one month or more with one treatment. The concentration selection range of the bactericide or antibacterial agent to be added is widened, the effect is recognized in a small amount, and conversely, even when a concentration exceeding the MCC value is added, the harmful effect on useful activated sludge microorganisms is reduced. As a result, the control of the added amount is dramatically facilitated.

───────────────────────────────────────────────────── フロントページの続き (72)発明者 平田 正一 東京都千代田区鍛冶町1−5−7 環境エ ンジニアリング株式会社内 (72)発明者 染岡 孝宣 東京都千代田区鍛冶町1−5−7 環境エ ンジニアリング株式会社内 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Shoichi Hirata 1-5-7 Kajimachi, Chiyoda-ku, Tokyo Within Environmental Engineering Co., Ltd. (72) Inventor Takanobu Someoka 1-Kagomachi, Chiyoda-ku, Tokyo 1- 5-7 Environmental Engineering Co., Ltd.

Claims (2)

【特許請求の範囲】[Claims] 【請求項1】 バルキングの原因となる糸状性微生物に
対し殺菌或は静菌効果のある薬剤(殺菌剤或は抗菌剤)
とカチオン性の有機凝集剤との混合物からなることを特
徴とする排水処理におけるバルキング防止剤。
1. A drug having a bactericidal or bacteriostatic effect on filamentous microorganisms that cause bulking (bactericidal agent or antibacterial agent).
An anti-bulking agent in wastewater treatment, which comprises a mixture of an organic solvent and a cationic organic coagulant.
【請求項2】 バルキングが生じる又は生じた排水に対
して、バルキングの原因となる糸状性微生物に対し殺菌
或は静菌効果のある薬剤(殺菌剤或は抗菌剤)とカチオ
ン性の有機凝集剤とを併用することを特徴とする排水処
理におけるバルキングの防止方法。
2. A drug (bactericidal agent or antibacterial agent) having a bactericidal or bacteriostatic effect on the filamentous microorganisms causing bulking against the wastewater causing or causing bulking, and a cationic organic flocculant. A method for preventing bulking in wastewater treatment, which is characterized by using together with.
JP4251956A 1992-08-28 1992-08-28 Anti-bulking agent and anti-bulking method Expired - Lifetime JP2901819B2 (en)

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JP2004276017A (en) * 2003-02-25 2004-10-07 Kobelco Eco-Solutions Co Ltd Treatment system and treatment method of organic waste water
JP2004344741A (en) * 2003-05-21 2004-12-09 Nippon Soda Co Ltd Sewage treatment method
JP2006159130A (en) * 2004-12-09 2006-06-22 Toyohashi Univ Of Technology Method for suppressing generation of excess sludge
JP2006272258A (en) * 2005-03-30 2006-10-12 Shikoku Chem Corp Suppressing method of filamentoss bulking
JP2007000686A (en) * 2005-06-21 2007-01-11 Bio Carrier Technology:Kk Flocculation accelerator, activated sludge treatment method, and bulking preventive method
JP2011078983A (en) * 2004-06-21 2011-04-21 Rhodia Uk Ltd Improvement of sludge quality
CN104860455A (en) * 2015-05-20 2015-08-26 广东省工程技术研究所 Methylene dithiocyanate wastewater treatment method
CN106186617A (en) * 2016-06-23 2016-12-07 金旭群 A kind of medicament processing municipal sludge and processing method
CN112111311A (en) * 2020-09-30 2020-12-22 桃江县新辉生物质颗粒有限公司 Biomass granular fuel and preparation method thereof

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2004276017A (en) * 2003-02-25 2004-10-07 Kobelco Eco-Solutions Co Ltd Treatment system and treatment method of organic waste water
JP2004344741A (en) * 2003-05-21 2004-12-09 Nippon Soda Co Ltd Sewage treatment method
JP2011078983A (en) * 2004-06-21 2011-04-21 Rhodia Uk Ltd Improvement of sludge quality
JP2006159130A (en) * 2004-12-09 2006-06-22 Toyohashi Univ Of Technology Method for suppressing generation of excess sludge
JP4626286B2 (en) * 2004-12-09 2011-02-02 国立大学法人豊橋技術科学大学 Control method of excess sludge generation
JP2006272258A (en) * 2005-03-30 2006-10-12 Shikoku Chem Corp Suppressing method of filamentoss bulking
JP2007000686A (en) * 2005-06-21 2007-01-11 Bio Carrier Technology:Kk Flocculation accelerator, activated sludge treatment method, and bulking preventive method
CN104860455A (en) * 2015-05-20 2015-08-26 广东省工程技术研究所 Methylene dithiocyanate wastewater treatment method
CN106186617A (en) * 2016-06-23 2016-12-07 金旭群 A kind of medicament processing municipal sludge and processing method
CN106186617B (en) * 2016-06-23 2019-10-25 金旭群 A kind of medicament and processing method handling municipal sludge
CN112111311A (en) * 2020-09-30 2020-12-22 桃江县新辉生物质颗粒有限公司 Biomass granular fuel and preparation method thereof

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