JP2003305493A - Method for starting activated sludge treating apparatus - Google Patents
Method for starting activated sludge treating apparatusInfo
- Publication number
- JP2003305493A JP2003305493A JP2002114286A JP2002114286A JP2003305493A JP 2003305493 A JP2003305493 A JP 2003305493A JP 2002114286 A JP2002114286 A JP 2002114286A JP 2002114286 A JP2002114286 A JP 2002114286A JP 2003305493 A JP2003305493 A JP 2003305493A
- Authority
- JP
- Japan
- Prior art keywords
- activated sludge
- treatment device
- sludge treatment
- started
- starting
- 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
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
Abstract
Description
【０００１】[0001]
【発明が属する技術分野】本発明は、活性汚泥処理装置
の立ち上げ方法に関し、特には、活性汚泥処理装置の立
ち上げ時に、馴養すべき微生物を選択し、不要な微生物
を流出させることにより、活性汚泥処理装置を短時間で
立ち上げることができる活性汚泥処理装置の立ち上げ方
法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for starting up an activated sludge treatment device, and in particular, at the time of starting up the activated sludge treatment device, a microorganism to be acclimatized is selected and unnecessary microorganisms are discharged. The present invention relates to a method for starting up an activated sludge treatment device capable of starting up the activated sludge treatment device in a short time.
【０００２】[0002]
【従来の技術】従来、活性汚泥処理装置の立ち上げ時に
は、通常、例えば下水処理場、し尿処理場などの他の処
理場の活性汚泥、あるいは産業排水の活性汚泥が種汚泥
として５００〜２０００ｍｇ／Ｌ程度添加されていた。
また、一部には、活性汚泥処理装置の立ち上げ時に、微
生物製剤が微生物源として添加される場合もあった。種
汚泥を添加する主な目的は、活性汚泥処理装置の立ち上
げ期間を短縮することである。下水処理用の活性汚泥処
理装置を立ち上げる場合には、種汚泥として下水の種汚
泥が最適であり、し尿処理用の活性汚泥処理装置を立ち
上げる場合には、種汚泥としてし尿汚泥が最適である。2. Description of the Related Art Conventionally, when an activated sludge treatment device is started up, activated sludge of another treatment plant such as a sewage treatment plant and a night soil treatment plant, or activated sludge of industrial wastewater is usually used as seed sludge in an amount of 500 to 2000 mg / min. About L was added.
Further, in some cases, a microbial preparation was added as a microbial source when the activated sludge treatment device was started up. The main purpose of adding seed sludge is to shorten the start-up period of the activated sludge treatment device. When starting an activated sludge treatment device for sewage treatment, sewage seed sludge is the most suitable seed sludge, and when starting an activated sludge treatment device for human waste treatment, human sewage sludge is the best seed sludge. is there.
【０００３】ところが、上述した方法によって活性汚泥
処理装置を立ち上げる場合には、以下のような問題点が
あった。
１．近くに同種の処理場がない場合には、最適な種汚泥
の入手が困難であった。
２．種汚泥の運搬中に種汚泥が腐敗し、悪臭や有毒ガス
が発生してしまうおそれがあった。
３．種汚泥の運搬中に種汚泥が変性し、種汚泥の馴養に
比較的長い時間を要してしまうおそれがあった。
４．大量の種汚泥が必要な場合には、種汚泥の運搬、投
入に多大のコスト、手間が必要になってしまうおそれが
あった。
５．活性汚泥処理時に汚泥が十分に馴養されていなけれ
ば、排水中に汚泥の死骸、分散菌体などが含まれ、環境
が汚染されてしまうおそれがあった。However, when the activated sludge treatment device is started up by the above method, there are the following problems. 1. It was difficult to obtain optimum seed sludge if there were no similar treatment plants nearby. 2. During transportation of the seed sludge, the seed sludge may be decomposed, and a foul odor and toxic gas may be generated. 3. The seed sludge may be denatured during transportation of the seed sludge, and it may take a relatively long time to acclimate the seed sludge. 4. When a large amount of seed sludge is required, there is a risk that a large amount of cost and labor will be required to transport and input the seed sludge. 5. If the sludge was not acclimatized sufficiently at the time of activated sludge treatment, the wastewater might contain sludge carcasses, dispersed bacterial cells, etc., and pollute the environment.
【０００４】また従来、活性汚泥処理装置の立ち上げ時
に活性汚泥処理装置に凝集剤を添加する活性汚泥処理装
置の立ち上げ方法が知られている。この種の活性汚泥処
理装置の立ち上げ方法の例としては、例えば特開２００
２−１８４６６号公報に記載されたものがある。特開２
００２−１８４６６号公報に記載された活性汚泥処理装
置の立ち上げ方法では、活性汚泥処理槽に流入する有機
物や浮遊するＳＳ類を凝集処理するために、活性汚泥処
理装置の立ち上げ時に凝集剤が添加される。Further, conventionally, there is known a method for starting up an activated sludge treatment device in which a flocculant is added to the activated sludge treatment device when the activated sludge treatment device is started up. An example of a method for starting up this type of activated sludge treatment device is, for example, JP-A-200
There is one described in Japanese Patent Publication No. 2-18466. JP 2
In the method for starting up the activated sludge treatment device described in Japanese Patent Laid-Open No. 002-18466, a coagulant is added at the time of starting up the activated sludge treatment device in order to coagulate the organic matters and the floating SSs flowing into the activated sludge treatment tank. Is added.
【０００５】ところが、特開２００２−１８４６６号公
報に記載された活性汚泥処理装置の立ち上げ方法では、
活性汚泥処理装置の固液分離手段として膜分離装置が用
いられている。そのため、活性汚泥処理装置の立ち上げ
時に、凝集せしめられた固形分や馴養すべき有用な微生
物のみならず、不要な微生物までもが、膜分離装置によ
って濃縮されてしまう。その結果、活性汚泥処理装置の
立ち上げ時に、排水処理に適した有用な微生物を馴養す
るのに比較的長い時間がかかってしまう。However, in the method for starting up the activated sludge treatment device disclosed in Japanese Patent Laid-Open No. 2002-18466,
A membrane separation device is used as a solid-liquid separation means of an activated sludge treatment device. For this reason, when the activated sludge treatment device is started up, not only the solid content that has been agglomerated and useful microorganisms to be acclimatized but also unnecessary microorganisms are concentrated by the membrane separation device. As a result, it takes a relatively long time to acclimate useful microorganisms suitable for wastewater treatment when the activated sludge treatment device is started up.
【０００６】[0006]
【発明が解決しようとする課題】前記問題点に鑑み、本
発明は、活性汚泥処理装置の立ち上げ時に、馴養すべき
微生物を選択し、不要な微生物を流出させることによ
り、活性汚泥処理装置を短時間で立ち上げることができ
る活性汚泥処理装置の立ち上げ方法を提供することを目
的とする。In view of the above problems, the present invention provides an activated sludge treatment apparatus by selecting microorganisms to acclimate and letting out unnecessary microorganisms when the activated sludge treatment apparatus is started up. An object of the present invention is to provide a method for starting up an activated sludge treatment device that can be started up in a short time.
【０００７】[0007]
【課題を解決するための手段】請求項１に記載の発明に
よれば、活性汚泥処理装置の立ち上げ時に活性汚泥処理
装置に凝集剤を添加する活性汚泥処理装置の立ち上げ方
法において、活性汚泥処理装置の固液分離手段として沈
殿槽を用い、活性汚泥処理装置の立ち上げ時に、凝集剤
として鉄塩を添加すると共に、ｐＨを５．５〜８．５に
調整することを特徴とする活性汚泥処理装置の立ち上げ
方法が提供される。According to the invention as set forth in claim 1, in a method for starting up an activated sludge treatment device, which comprises adding a coagulant to the activated sludge treatment device when the activated sludge treatment device is started up, the activated sludge is provided. An activity characterized by using a precipitation tank as a solid-liquid separation means of the treatment device, adding an iron salt as a coagulant at the time of starting the activated sludge treatment device, and adjusting the pH to 5.5 to 8.5. A method for starting up a sludge treatment device is provided.
【０００８】請求項２に記載の発明によれば、活性汚泥
処理装置の立ち上げ時に、鉄塩よりも少ない量の活性汚
泥および微生物製剤を添加することを特徴とする請求項
１に記載の活性汚泥処理装置の立ち上げ方法が提供され
る。According to the invention described in claim 2, when the activated sludge treatment device is started up, a smaller amount of activated sludge and microbial preparation than iron salt is added, and the activity according to claim 1 A method for starting up a sludge treatment device is provided.
【０００９】請求項１及び２に記載の活性汚泥処理装置
の立ち上げ方法では、立ち上げ時に凝集剤が添加される
活性汚泥処理装置の固液分離手段として沈殿槽が用いら
れる。そのため、活性汚泥処理装置の固液分離手段とし
て膜分離装置が用いられている特開２００２−１８４６
６号公報に記載された活性汚泥処理装置の立ち上げ方法
のように、活性汚泥処理装置の立ち上げ時に、凝集せし
められた固形分や馴養すべき有用な微生物のみならず、
不要な微生物までもが、膜分離装置によって濃縮されて
しまうのを回避することができる。つまり、不要な微生
物は沈殿槽から流出する処理水と共に流出してしまう。
その結果、活性汚泥処理装置の立ち上げ時に、排水処理
に適した有用な微生物を比較的短い時間で馴養すること
ができる。In the method for starting up the activated sludge treatment device according to the first and second aspects, a settling tank is used as a solid-liquid separation means of the activated sludge treatment device to which a flocculant is added at the time of start-up. Therefore, a membrane separation device is used as the solid-liquid separation means of the activated sludge treatment device.
As in the method for starting up the activated sludge treatment device described in Japanese Patent Publication No. 6, when the activated sludge treatment device is started up, not only are the solid contents agglomerated and useful microorganisms to be acclimatized,
Even unnecessary microorganisms can be prevented from being concentrated by the membrane separation device. That is, unnecessary microorganisms flow out together with the treated water flowing out of the settling tank.
As a result, when starting up the activated sludge treatment device, useful microorganisms suitable for wastewater treatment can be acclimatized in a relatively short time.
【００１０】更に、請求項１及び２に記載の活性汚泥処
理装置の立ち上げ方法では、活性汚泥処理装置の立ち上
げ時に、凝集剤として鉄塩が添加される。そのため、沈
殿槽によって固液分離される混合液から固形分を効果的
に除去することができる。その結果、活性汚泥処理装置
の運転開始直後から、透明性に優れた低有機物の処理水
を得ることができる。また、鉄塩が腐敗臭気原因物質と
反応することにより、効果的に臭気を除去することがで
きる。更に、添加された鉄塩に基づく水酸化第二鉄のフ
ロックにより、リン酸を吸着することができる。その結
果、その吸着されたリン酸を微生物の栄養源として利用
することができる。Further, in the method for starting up the activated sludge treatment device according to the first and second aspects, an iron salt is added as a coagulant at the time of starting up the activated sludge treatment device. Therefore, the solid content can be effectively removed from the mixed liquid which is solid-liquid separated by the settling tank. As a result, it is possible to obtain the treated water of low organic matter having excellent transparency immediately after the operation of the activated sludge treatment device is started. Further, the odor can be effectively removed by the reaction of the iron salt with the putrefactive odor-causing substance. In addition, phosphoric acid can be adsorbed by ferric hydroxide flocs based on the added iron salt. As a result, the adsorbed phosphoric acid can be used as a nutrient source for microorganisms.
【００１１】また、請求項１及び２に記載の活性汚泥処
理装置の立ち上げ方法では、活性汚泥処理装置の立ち上
げ時に、凝集剤として鉄塩が添加されると共に、ｐＨが
５．５〜８．５に調整される。そのため、ｐＨが５．５
〜８．５に調整されない場合よりも沈降性のよい水酸化
第二鉄のフロックを形成することができる。その結果、
水酸化第二鉄のフロック表面で微生物が増殖し、それに
より、ｐＨが５．５〜８．５に調整されない場合よりも
短い時間で活性汚泥処理装置を立ち上げることができ
る。Further, in the method for starting up the activated sludge treatment device according to the first and second aspects, at the time of starting up the activated sludge treatment device, an iron salt is added as a coagulant and the pH is 5.5 to 8. Adjusted to .5. Therefore, the pH is 5.5
It is possible to form ferric hydroxide flocs with better sedimentation than when not adjusted to ~ 8.5. as a result,
Microorganisms grow on the ferric hydroxide flock surface, which allows the activated sludge treatment device to be started up in a shorter time than if the pH was not adjusted to 5.5-8.5.
【００１２】[0012]
【発明の実施の形態】以下、添付図面を用いて本発明の
実施形態について説明する。BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the accompanying drawings.
【００１３】図１は本発明の活性汚泥処理装置の立ち上
げ方法の一実施形態によって立ち上げられる活性汚泥処
理装置の概略構成図、図２は図１に示した活性汚泥処理
装置の断面図である。図１及び図２において、１はオキ
シデーションディッチ、２は無終端水路、３は無終端水
路２内の被処理水を曝気するための曝気装置、４はコー
ナーガイド、５はバッフルプレートである。６はオキシ
デーションディッチ１において曝気されつつ生物処理さ
れた被処理水を固液分離するための最終沈殿槽、７は滅
菌槽、８はポンプである。つまり、本実施形態では、活
性汚泥処理装置の固液分離手段として最終沈殿槽６が用
いられている。FIG. 1 is a schematic configuration diagram of an activated sludge treatment device activated by an embodiment of the activated sludge treatment device startup method of the present invention, and FIG. 2 is a sectional view of the activated sludge treatment device shown in FIG. is there. 1 and 2, 1 is an oxidation ditch, 2 is an endless water channel, 3 is an aeration device for aerating the water to be treated in the endless water channel 2, 4 is a corner guide, and 5 is a baffle plate. Reference numeral 6 is a final settling tank for solid-liquid separation of water to be treated which has been biologically treated while being aerated in the oxidation ditch 1, 7 is a sterilization tank, and 8 is a pump. That is, in this embodiment, the final settling tank 6 is used as the solid-liquid separation means of the activated sludge treatment device.
【００１４】本実施形態では、図１及び図２に示す活性
汚泥処理装置の立ち上げ時に、凝集剤として鉄塩が添加
される。添加される鉄塩としては、塩化第二鉄、硫酸第
二鉄、ポリ鉄、塩化第一鉄、硫酸第一鉄などの任意の鉄
塩を使用可能である。鉄塩の添加量は、鉄として、曝気
槽容積当たり１００〜１０，０００ｍｇ／Ｌが好まし
く、２００〜１，０００ｍｇ／Ｌが更に好ましい。鉄塩
として第二鉄のものが添加されると、水酸化第二鉄のフ
ロックが形成される。一方、鉄塩として第一鉄のものが
添加されると、曝気により第一鉄が酸化されて第二鉄に
なった後、水酸化第二鉄になり、水酸化第二鉄のフロッ
クが形成される。In this embodiment, an iron salt is added as a coagulant when the activated sludge treatment apparatus shown in FIGS. 1 and 2 is started up. As the iron salt to be added, any iron salt such as ferric chloride, ferric sulfate, polyiron, ferrous chloride and ferrous sulfate can be used. The amount of iron salt added is preferably 100 to 10,000 mg / L, and more preferably 200 to 1,000 mg / L, as iron, per aeration tank volume. When ferric iron is added as the iron salt, ferric hydroxide flocs are formed. On the other hand, when ferrous iron salt is added as an iron salt, ferrous oxide is oxidized by aeration to become ferric iron, then ferric hydroxide, and ferric hydroxide flocs are formed. To be done.
【００１５】また本実施形態では、図１及び図２に示す
活性汚泥処理装置の立ち上げ時に、凝集剤として鉄塩が
添加されると共に、ｐＨが５．５〜８．５に調整され
る。ｐＨが５．５〜８．５に調整されると、沈降性の良
い水酸化第二鉄のフロックが形成され、この水酸化第二
鉄のフロックによって有機物が吸着されるようになる。
この水酸化第二鉄のフロックは、微生物を吸着する担体
としても優れ、液中の微生物を有効に吸着する。その結
果、水酸化第二鉄のフロックの表面で微生物が増殖する
ようになる。Further, in this embodiment, when the activated sludge treatment device shown in FIGS. 1 and 2 is started up, an iron salt is added as a coagulant and the pH is adjusted to 5.5 to 8.5. When the pH is adjusted to 5.5 to 8.5, ferric hydroxide flocs having good sedimentation properties are formed, and organic compounds are adsorbed by the ferric hydroxide flocs.
This ferric hydroxide floc is also excellent as a carrier for adsorbing microorganisms, and effectively adsorbs microorganisms in the liquid. As a result, microorganisms will grow on the surface of the ferric hydroxide flocs.
【００１６】詳細には、本実施形態では、図１及び図２
に示す活性汚泥処理装置の立ち上げ時に、凝集剤として
鉄塩が添加されると共に、ｐＨが５．５〜８．５に調整
され、ＤＯが検出されるように曝気装置３によって曝気
が行われる。その結果、被処理水中の有機物が効率的に
水酸化第二鉄のフロックに吸着され、水酸化第二鉄のフ
ロックの表面に増殖している微生物により、水酸化第二
鉄のフロックに吸着された有機物が酸化・分解せしめら
れる。それにより、水酸化第二鉄のフロックの表面の微
生物がさらに増殖することになり、極めて沈降性の良い
微生物・鉄の複合フロックが形成される。水酸化第二鉄
のフロックは有機物の吸着剤および微生物増殖担体とし
て有効に機能するため、本実施形態では、図１及び図２
に示した活性汚泥処理装置の立ち上げを極めて速やかに
かつ確実に進行させることができる。More specifically, in this embodiment, FIG. 1 and FIG.
At the time of starting up the activated sludge treatment device shown in (1), aeration is performed by the aeration device 3 so that iron salt is added as a coagulant, the pH is adjusted to 5.5 to 8.5, and DO is detected. . As a result, organic matter in the water to be treated is efficiently adsorbed on the ferric hydroxide flocs, and is adsorbed on the ferric hydroxide flocs by the microorganisms growing on the surface of the ferric hydroxide flocs. Organic matter is oxidized and decomposed. As a result, the microorganisms on the surface of the ferric hydroxide flocs are further proliferated, and a composite floc of microorganisms and iron having an extremely good sedimentation property is formed. Since the ferric hydroxide flocs effectively function as an adsorbent of organic substances and a carrier for microbial growth, in the present embodiment, the flocs of FIGS.
The activation of the activated sludge treatment device shown in (2) can be made to proceed extremely quickly and reliably.
【００１７】水酸化第二鉄のフロックは凝集性にも優れ
るため、本実施形態により立ち上げられた活性汚泥処理
装置では、運転開始直後から被処理水中の固形分を除去
することができ、透明性に優れ、かつ、低有機物の処理
水を得ることができる。Since the ferric hydroxide flocs are excellent in cohesiveness, the activated sludge treatment apparatus started up according to this embodiment can remove the solid content in the water to be treated immediately after the start of the operation, and thus it is transparent. It is possible to obtain treated water having excellent properties and low organic matter.
【００１８】また、水酸化鉄は硫化水素メチルメルカプ
タンなどの腐敗臭気原因物質との反応性も高いため、本
実施形態では、活性汚泥処理装置の立ち上げ時に、臭気
を効果的に除去することもできる。つまり、活性汚泥処
理装置の立ち上げ時に腐敗した種汚泥が添加されても、
悪性ガスの発生を抑制し、臭気の問題を回避することが
できる。Further, since iron hydroxide has a high reactivity with a substance causing a rotten odor such as hydrogen sulfide methyl mercaptan, in the present embodiment, the odor can be effectively removed when the activated sludge treatment device is started up. it can. In other words, even if spoiled seed sludge is added when the activated sludge treatment device is started up,
It is possible to suppress the generation of malignant gas and avoid the problem of odor.
【００１９】更に、水酸化第二鉄のフロックはリン酸の
吸着能力も高いため、本実施形態では、活性汚泥処理装
置の立ち上げ時に活性汚泥処理装置に対して供給される
排水中のリンが不足している場合であっても、必要十分
量のリンを一度添加することにより、水酸化第二鉄のフ
ロックによって吸着されたリンが微生物の栄養源として
有効に利用されるようになり、リンを連続添加する必要
性を排除することができる。Further, since the ferric hydroxide flocs have a high ability to adsorb phosphoric acid, in the present embodiment, phosphorus in the wastewater supplied to the activated sludge treatment device when the activated sludge treatment device is started up is reduced. Even if it is insufficient, once the necessary and sufficient amount of phosphorus is added, the phosphorus adsorbed by the ferric hydroxide flocs can be effectively used as a nutrient source for microorganisms. The need for continuous addition of can be eliminated.
【００２０】図１及び図２に示す活性汚泥処理装置の立
ち上げ時にｐＨを５．５〜８．５に調整する場合には、
水酸化ナトリウム、石灰などのアルカリ剤が用いられ
る。好ましくは、活性汚泥処理装置の立ち上げ時に、ｐ
Ｈが６〜６．５に調整される。水酸化第二鉄のフロック
の形成性はｐＨ６前後で最も良くなるが、微生物活性を
最大限に利用するために、本実施形態では、活性汚泥処
理装置の立ち上げ時にｐＨが５．５〜８．５に調整さ
れ、好ましくは、ｐＨが６〜６．５に調整される。When the pH is adjusted to 5.5 to 8.5 when the activated sludge treatment apparatus shown in FIGS. 1 and 2 is started up,
An alkaline agent such as sodium hydroxide or lime is used. Preferably, when starting the activated sludge treatment device, p
H is adjusted to 6 to 6.5. The ferric hydroxide has the highest floc-forming property at around pH 6, but in order to make the most of microbial activity, in this embodiment, the pH is 5.5 to 8 when the activated sludge treatment device is started up. The pH is adjusted to pH 6.5 and preferably to pH 6 to 6.5.
【００２１】図１及び図２に示した曝気装置３は、ＤＯ
が検出されるように設定され、好ましくはＤＯ：０．５
ｍｇ／Ｌ〜飽和に設定され、最適にはＤＯ：１．０〜
３．０ｍｇ／Ｌに設定される。The aeration device 3 shown in FIG. 1 and FIG.
Is set to be detected, preferably DO: 0.5
mg / L ~ saturation, optimally DO: 1.0 ~
It is set to 3.0 mg / L.
【００２２】また本実施形態では、活性汚泥処理装置の
立ち上げ時に、鉄塩よりも少ない量の活性汚泥および微
生物製剤が添加される。Further, in this embodiment, when the activated sludge treatment device is started up, the activated sludge and the microbial preparation are added in an amount smaller than that of the iron salt.
【００２３】（実施例１）曝気槽容量４５０ｍ３、沈殿
槽水面積１９２ｍ３の食品排水処理の活性汚泥処理装置
の立ち上げにあたって、水張りの後、塩化第二鉄溶液
（３８度ボーメ）５００ｋｇを添加した後、曝気攪拌
し、２５％水酸化ナトリウム水溶液でｐＨを６．５に調
整した。排水（ＢＯＤ：４００ｍｇ／Ｌ）を１０ｍ３／
ｈｒで通水し、汚泥返送量８０ｍ３／ｈｒで運転を開始
したところ、処理水は通水直後から透視度５５ｃｍ、Ｂ
ＯＤ：４０ｍｇ／Ｌとなった。２４時間経過後、通水量
を２倍に増加、通水３日後には、計画量である８０ｍ３
／ｈｒに増加した。処理水水質はＢＯＤ：１５ｍｇ／Ｌ
と、極めて良好であった。(Example 1) When starting up an activated sludge treatment device for food wastewater treatment having an aeration tank capacity of 450 m 3 and a sedimentation tank water area of 192 m 3 , after water filling, 500 kg of ferric chloride solution (38 ° Baume) was added. After the addition, the mixture was aerated and stirred, and the pH was adjusted to 6.5 with a 25% aqueous sodium hydroxide solution. Waste water (BOD: 400 mg / L) is 10 m 3 /
When water was passed for hrs and operation was started at a sludge return rate of 80 m 3 / hr, the treated water had a transparency of 55 cm immediately after passing water, and B
The OD was 40 mg / L. After 24 hours, the amount of water flow doubled, and after 3 days of water flow, the planned amount was 80m 3
/ Hr. Treated water quality is BOD: 15mg / L
Was extremely good.
【００２４】（比較例）曝気槽容量３００ｍ３、沈殿槽
水面積３０ｍ３のオキシデーションディッチの立ち上げ
に際して、近くのし尿処理場から種汚泥（ＭＬＳＳ：
８，０００ｍｇ／Ｌ）をバキュームカーで５０ｍ３運搬
して投入し、下水を通水し、汚泥返送量１２．５ｍ３／
ｈｒで運転を開始した。この下水処理場は、負荷が低
く、通水量が計画値（３００ｍ３／ｄａｙ）の１０％で
あった。運転開始当初より処理水の透視度が低く（１０
〜１５ｃｍ）、ＢＯＤ除去率も低かった（３０〜５０
％）。通水開始から２週間後には、添加した種汚泥のほ
とんどが流出し、処理が不可能になった。(Comparative Example) When an oxidation ditch with an aeration tank capacity of 300 m 3 and a sedimentation tank water area of 30 m 3 was started up, seed sludge (MLSS:
8,000 mg / L) was transported by a vacuum car for 50 m 3 and input, sewage was passed through, and sludge return amount was 12.5 m 3 /
The operation was started at hr. This sewage treatment plant had a low load, and the water flow rate was 10% of the planned value (300 m 3 / day). The transparency of the treated water is low from the beginning of the operation (10
(~ 15 cm), BOD removal rate was also low (30-50)
%). Two weeks after the start of water flow, most of the added seed sludge flowed out and the treatment became impossible.
【００２５】（実施例２）そこで、塩化第二鉄溶液（３
８度ボーメ）１００ｋｇ、ポリ硫酸鉄（鉄として１０％
含有）を５０ｋｇ投入し、石灰を添加してｐＨを６．０
に調整した。曝気は上述した（比較例）の状態より継続
的に行った。また、同様のし尿処理場から、同様の種汚
泥１０ｍ３を運搬、添加した。その結果、通水初期から
処理水の透視度は５０ｃｍ以上となり、処理水のＢＯＤ
も１０ｍｇ／Ｌ以下となった。この状態は安定して継続
し、以後、特別な対処は不要であった。(Example 2) Then, a ferric chloride solution (3
8 degree Baume 100kg, poly iron sulfate (10% as iron)
(Containing) 50 kg, lime is added to adjust the pH to 6.0.
Adjusted to. The aeration was continuously performed from the above-mentioned state (comparative example). Further, 10 m 3 of the same seed sludge was transported and added from the same human waste treatment plant. As a result, the transparency of the treated water was 50 cm or more from the beginning of water flow, and the BOD of the treated water was
Was also 10 mg / L or less. This condition continued steadily, and no special measures were required thereafter.
【００２６】[0026]
【発明の効果】請求項１及び２に記載の発明によれば、
活性汚泥処理装置の固液分離手段として膜分離装置が用
いられている特開２００２−１８４６６号公報に記載さ
れた活性汚泥処理装置の立ち上げ方法のように、活性汚
泥処理装置の立ち上げ時に、凝集せしめられた固形分や
馴養すべき有用な微生物のみならず、不要な微生物まで
もが、膜分離装置によって濃縮されてしまうのを回避す
ることができる。つまり、不要な微生物は沈殿槽から流
出する処理水と共に流出してしまう。その結果、活性汚
泥処理装置の立ち上げ時に、排水処理に適した有用な微
生物を比較的短い時間で馴養することができる。According to the invention described in claims 1 and 2,
When the activated sludge treatment device is started up, as in the activated sludge treatment device startup method described in JP-A-2002-18466, in which the membrane separation device is used as the solid-liquid separation means of the activated sludge treatment device, It is possible to avoid not only the aggregated solid content and useful microorganisms to be acclimatized but also unnecessary microorganisms from being concentrated by the membrane separation device. That is, unnecessary microorganisms flow out together with the treated water flowing out of the settling tank. As a result, when starting up the activated sludge treatment device, useful microorganisms suitable for wastewater treatment can be acclimatized in a relatively short time.
【００２７】更に、請求項１及び２に記載の発明によれ
ば、沈殿槽によって固液分離される混合液から固形分を
効果的に除去することができる。その結果、活性汚泥処
理装置の運転開始直後から、透明性に優れた低有機物の
処理水を得ることができる。また、鉄塩が腐敗臭気原因
物質と反応することにより、効果的に臭気を除去するこ
とができる。更に、添加された鉄塩に基づく水酸化第二
鉄のフロックにより、リン酸を吸着することができる。
その結果、その吸着されたリン酸を微生物の栄養源とし
て利用することができる。Further, according to the first and second aspects of the invention, the solid content can be effectively removed from the mixed liquid which is subjected to solid-liquid separation in the settling tank. As a result, it is possible to obtain the treated water of low organic matter having excellent transparency immediately after the operation of the activated sludge treatment device is started. Further, the odor can be effectively removed by the reaction of the iron salt with the putrefactive odor-causing substance. In addition, phosphoric acid can be adsorbed by ferric hydroxide flocs based on the added iron salt.
As a result, the adsorbed phosphoric acid can be used as a nutrient source for microorganisms.
【００２８】また、請求項１及び２に記載の発明によれ
ば、ｐＨが５．５〜８．５に調整されない場合よりも沈
降性のよい水酸化第二鉄のフロックを形成することがで
きる。その結果、水酸化第二鉄のフロック表面で微生物
が増殖し、それにより、ｐＨが５．５〜８．５に調整さ
れない場合よりも短い時間で活性汚泥処理装置を立ち上
げることができる。According to the first and second aspects of the present invention, it is possible to form ferric hydroxide flocs having a better sedimentation property than when the pH is not adjusted to 5.5 to 8.5. . As a result, microorganisms grow on the surface of ferric hydroxide flocs, thereby enabling the activated sludge treatment device to be started up in a shorter time than when the pH is not adjusted to 5.5 to 8.5.
【図１】本発明の活性汚泥処理装置の立ち上げ方法の一
実施形態によって立ち上げられる活性汚泥処理装置の概
略構成図である。FIG. 1 is a schematic configuration diagram of an activated sludge treatment device started up by an embodiment of a method for starting up an activated sludge treatment device according to the present invention.
【図２】図１に示した活性汚泥処理装置の断面図であ
る。2 is a cross-sectional view of the activated sludge treatment device shown in FIG.
１ オキシデーションディッチ ２ 無終端水路 ３ 曝気装置 ６ 最終沈殿槽 ７ 滅菌槽 1 Oxidation Ditch 2 endless waterways 3 Aeration device 6 final settling tank 7 sterilization tank
Claims (2)
泥処理装置に凝集剤を添加する活性汚泥処理装置の立ち
上げ方法において、活性汚泥処理装置の固液分離手段と
して沈殿槽を用い、活性汚泥処理装置の立ち上げ時に、
凝集剤として鉄塩を添加すると共に、ｐＨを５．５〜
８．５に調整することを特徴とする活性汚泥処理装置の
立ち上げ方法。1. A method for starting up an activated sludge treatment device, wherein a flocculant is added to the activated sludge treatment device when the activated sludge treatment device is started up, wherein a settling tank is used as a solid-liquid separation means of the activated sludge treatment device. When starting up the processing equipment,
While adding iron salt as a coagulant, the pH was adjusted to 5.5.
A method for starting up an activated sludge treatment device, which is characterized by adjusting to 8.5.
よりも少ない量の活性汚泥および微生物製剤を添加する
ことを特徴とする請求項１に記載の活性汚泥処理装置の
立ち上げ方法。2. The method for starting up the activated sludge treatment device according to claim 1, wherein the activated sludge and the microbial preparation are added in an amount smaller than that of the iron salt when the activated sludge treatment device is started up.
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|---|---|---|---|
| JP2002114286A JP3856218B2 (en) | 2002-04-17 | 2002-04-17 | Startup method of activated sludge treatment equipment |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2002114286A JP3856218B2 (en) | 2002-04-17 | 2002-04-17 | Startup method of activated sludge treatment equipment |
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| Publication Number | Publication Date |
|---|---|
| JP2003305493A true JP2003305493A (en) | 2003-10-28 |
| JP3856218B2 JP3856218B2 (en) | 2006-12-13 |
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ID=29396161
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|---|---|---|---|
| JP2002114286A Expired - Fee Related JP3856218B2 (en) | 2002-04-17 | 2002-04-17 | Startup method of activated sludge treatment equipment |
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| JP2013103185A (en) * | 2011-11-15 | 2013-05-30 | Japan Sewage Works Agency | Wastewater treatment apparatus |
| CN106045022A (en) * | 2016-07-18 | 2016-10-26 | 程晨 | Oxidation ditch process and application method thereof |
| CN106045211A (en) * | 2016-07-18 | 2016-10-26 | 芮少春 | Oxidation ditch wastewater purification process and operation method thereof |
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2002
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2013103185A (en) * | 2011-11-15 | 2013-05-30 | Japan Sewage Works Agency | Wastewater treatment apparatus |
| CN106045022A (en) * | 2016-07-18 | 2016-10-26 | 程晨 | Oxidation ditch process and application method thereof |
| CN106045211A (en) * | 2016-07-18 | 2016-10-26 | 芮少春 | Oxidation ditch wastewater purification process and operation method thereof |
| CN106186583A (en) * | 2016-08-31 | 2016-12-07 | 浙江力源皮业有限公司 | A kind of plant chimney stalk administering method |
| JP2018083138A (en) * | 2016-11-21 | 2018-05-31 | 清水建設株式会社 | Processing system of metal-containing waste water |
| JP2018183754A (en) * | 2017-04-27 | 2018-11-22 | 清水建設株式会社 | Method for treating metal-containing wastewater and treatment system for metal containing wastewater |
| CN108046528A (en) * | 2017-12-20 | 2018-05-18 | 佛山科学技术学院 | A kind of green plum pickling biochemical procss for treating waste water |
| CN108178427A (en) * | 2017-12-20 | 2018-06-19 | 佛山科学技术学院 | A kind of red bayberry is pickled biochemical procss for treating waste water |
| CN108178427B (en) * | 2017-12-20 | 2021-02-09 | 佛山科学技术学院 | Biochemical treatment method for waxberry pickling wastewater |
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