JPH09276884A - Bacteria immobilized carrier separating method and treatment method of waste water utilizing the same - Google Patents
Bacteria immobilized carrier separating method and treatment method of waste water utilizing the sameInfo
- Publication number
- JPH09276884A JPH09276884A JP6770796A JP6770796A JPH09276884A JP H09276884 A JPH09276884 A JP H09276884A JP 6770796 A JP6770796 A JP 6770796A JP 6770796 A JP6770796 A JP 6770796A JP H09276884 A JPH09276884 A JP H09276884A
- Authority
- JP
- Japan
- Prior art keywords
- tank
- microorganism
- immobilized carrier
- wastewater
- nitrification
- 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
Landscapes
- Immobilizing And Processing Of Enzymes And Microorganisms (AREA)
- Biological Treatment Of Waste Water (AREA)
- Purification Treatments By Anaerobic Or Anaerobic And Aerobic Bacteria Or Animals (AREA)
Abstract
Description
【0001】[0001]
【発明の属する技術分野】本発明は、下水処理槽等に投
入された微生物固定化担体を廃水から分離するための方
法及びこれを利用した廃水の処理方法に関するものであ
る。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for separating a microorganism-immobilized carrier loaded in a sewage treatment tank or the like from wastewater, and a wastewater treatment method using the method.
【0002】[0002]
【従来の技術】微生物による生物反応を利用した廃水処
理において、微生物固定化担体を廃水中に投入して生物
濃度を高めることが行われている。そしてこの微生物固
定化担体が反応槽から流出することを防止するために、
反応槽の出口にスクリーンを設けて微生物固定化担体を
分離する方法が普通である。ところがこのスクリーンに
よる分離方法は、廃水中の夾雑物がスクリーンに付着し
たり絡み付いたりして閉塞し易いため、頻繁に洗浄作業
が必要があり、その洗浄も自動化が困難なためメンテナ
ンスに手数がかかるという問題がある。2. Description of the Related Art In wastewater treatment utilizing a biological reaction by microorganisms, a microorganism-immobilized carrier is put into wastewater to increase the biological concentration. And in order to prevent this microorganism-immobilized carrier from flowing out of the reaction tank,
It is usual to provide a screen at the outlet of the reaction tank to separate the microorganism-immobilized carrier. However, this screen separation method requires frequent cleaning work because contaminants in the wastewater tend to adhere to the screen or become entangled with the screen, which requires frequent cleaning work. There is a problem.
【0003】また、特開昭63−278595号公報に
示されているように、微生物固定化担体が投入された反
応槽の出口付近に流速の低い沈殿部を設け、その内部で
微生物固定化担体を沈殿させたうえ沈殿部の下部から濃
縮された微生物固定化担体を取り出す方法も知られてい
る。しかしこの方法は反応槽の内部に沈殿部を設ける必
要があるのでスペース上の問題がある。Further, as disclosed in Japanese Patent Application Laid-Open No. 63-278595, a sedimentation section having a low flow rate is provided near the outlet of the reaction tank into which the microorganism-immobilized carrier is charged, and the microorganism-immobilized carrier is provided therein. There is also known a method in which the microorganism-immobilized carrier is precipitated from the bottom of the precipitation part and the concentrated microorganism-immobilized carrier is taken out. However, this method has a space problem because it is necessary to provide a precipitation part inside the reaction tank.
【0004】さらに、特開平5−261393号公報に
示されるように、微生物固定化担体が投入された廃水を
ポンプにより流体サイクロンに送って遠心分離する方法
も考えられているが、この方法ではポンプを通過する際
に微生物固定化担体が物理的に破損してしまい、微生物
固定化担体の寿命が短くなってしまうという問題があ
る。Further, as disclosed in JP-A-5-261393, a method of sending waste water containing a microorganism-immobilized carrier to a fluid cyclone by a pump and centrifuging it is also considered. In this method, the pump is used. There is a problem that the microorganism-immobilized carrier is physically damaged when passing through the cell and the life of the microorganism-immobilized carrier is shortened.
【0005】[0005]
【発明が解決しようとする課題】本発明は上記した従来
の問題点を解決し、メンテナンスが容易であり、広いス
ペースを必要とせず、微生物固定化担体が損傷しにくい
微生物固定化担体の分離方法と、これを利用した廃水の
処理方法を提供するためになされたものである。The present invention solves the above-mentioned problems of the prior art, is easy to maintain, does not require a wide space, and is a method for separating a microorganism-immobilized carrier which is less likely to damage the microorganism-immobilized carrier. And to provide a method for treating wastewater using this.
【0006】[0006]
【課題を解決するための手段】上記の課題を解決するた
めになされた第1の発明の微生物固定化担体の分離方法
は、微生物固定化担体が投入された反応槽と、次工程の
反応槽との間、もしくは微生物固定化担体が投入された
反応槽出口付近に遠心分級器を設け、両反応槽間の落差
により生じる遠心分級器内のゆるやかな流れを利用して
微生物固定化担体を廃水から分離回収することを特徴と
するものである。The method for separating a microorganism-immobilized carrier according to the first aspect of the present invention, which has been made to solve the above-mentioned problems, comprises a reaction tank containing the microorganism-immobilized carrier and a reaction tank for the next step. Or a centrifuge classifier is installed near the outlet of the reaction tank in which the microorganism immobilization carrier is placed, and the microorganism immobilization carrier is used as waste water by utilizing the gentle flow in the centrifugal classifier caused by the drop between both reaction tanks. It is characterized by being separated and recovered from the.
【0007】また上記の課題を解決するためになされた
第2の発明の廃水の処理方法は、硝化槽に微生物固定化
担体を用いた生物学的硝化脱窒法による廃水の処理方法
であって、硝化槽の出口付近もしくは硝化槽と沈殿槽と
の間に遠心分級器を設けて廃水中から微生物固定化担体
を分離し、分離された微生物固定化担体を硝化槽の入口
へ返送することを特徴とするものである。また第3の発
明は、脱窒槽と硝化槽に微生物固定化担体を用いた生物
学的硝化脱窒法による廃水の処理方法であって、硝化槽
の出口付近もしくは硝化槽と沈殿槽との間に遠心分級器
を設けて廃水中から微生物固定化担体を分離し、分離さ
れた微生物固定化担体を脱窒槽の入口へ返送することを
特徴とするものである。また第4の発明は、脱窒槽と硝
化槽に微生物固定化担体を用いた生物学的硝化脱窒法に
よる廃水の処理方法であって、脱窒槽の出口付近もしく
は脱窒槽と硝化槽との間、および硝化槽の出口付近もし
くは硝化槽と沈殿槽との間にそれぞれ遠心分級器を設け
て廃水中から微生物固定化担体を分離し、分離された微
生物固定化担体を脱窒槽の入口と硝化槽の入口へそれぞ
れ返送することを特徴とするものである。The wastewater treatment method of the second invention made to solve the above problems is a treatment method of wastewater by a biological nitrification denitrification method using a microorganism immobilization carrier in a nitrification tank. Characterized by providing a centrifugal classifier near the exit of the nitrification tank or between the nitrification tank and the precipitation tank to separate the microorganism-immobilized carrier from the wastewater, and returning the separated microorganism-immobilized carrier to the inlet of the nitrification tank. It is what A third invention is a method for treating wastewater by a biological nitrification denitrification method using a microorganism immobilization carrier in a denitrification tank and a nitrification tank, which is near the outlet of the nitrification tank or between the nitrification tank and the precipitation tank. The method is characterized in that a centrifugal classifier is provided to separate the microorganism-immobilized carrier from the wastewater, and the separated microorganism-immobilized carrier is returned to the inlet of the denitrification tank. A fourth invention is a method for treating wastewater by a biological nitrification denitrification method using a microorganism immobilization carrier in a denitrification tank and a nitrification tank, which is provided near the outlet of the denitrification tank or between the denitrification tank and the nitrification tank. Also, a centrifugal classifier is installed near the exit of the nitrification tank or between the nitrification tank and the sedimentation tank to separate the microorganism-immobilized carrier from the wastewater, and the separated microorganism-immobilized carrier is connected to the inlet of the denitrification tank and the nitrification tank. It is characterized by returning each to the entrance.
【0008】更に同一の課題を解決するためになされた
第5の発明は、好気槽に微生物固定化担体を用いた嫌気
・無酸素・好気法による廃水の処理方法であって、好気
槽の出口付近もしくは好気槽と沈殿槽との間に遠心分級
器を設けて廃水中から微生物固定化担体を分離し、分離
された微生物固定化担体を好気槽の入口へ返送すること
を特徴とするものである。また第6の発明は、無酸素槽
と好気槽に微生物固定化担体を用いた嫌気・無酸素・好
気法による廃水の処理方法であって、好気槽の出口付近
もしくは好気槽と沈殿槽との間に遠心分級器を設けて廃
水中から微生物固定化担体を分離し、分離された微生物
固定化担体を無酸素槽の入口へ返送することを特徴とす
るものである。A fifth invention made to solve the same problem is a method for treating wastewater by an anaerobic / anoxic / aerobic method using a microorganism-immobilized carrier in an aerobic tank. A centrifugal classifier is installed near the outlet of the tank or between the aerobic tank and the sedimentation tank to separate the microorganism-immobilized carrier from the wastewater and return the separated microorganism-immobilized carrier to the inlet of the aerobic tank. It is a feature. A sixth invention is a method of treating wastewater by an anaerobic / anoxic / aerobic method using a microorganism-immobilized carrier in an anoxic tank and an aerobic tank, which is used near the outlet of the aerobic tank or the aerobic tank. It is characterized in that a centrifugal classifier is provided between the sedimentation tank and the microorganism-immobilized carrier from the wastewater, and the separated microorganism-immobilized carrier is returned to the inlet of the anoxic tank.
【0009】また第7の発明は、無酸素槽と好気槽に微
生物固定化担体を用いた嫌気・無酸素・好気法による廃
水の処理方法であって、無酸素槽の出口付近もしくは無
酸素槽と好気槽との間、および好気槽の出口付近もしく
は好気槽と沈殿槽との間に遠心分級器を設けて廃水中か
ら微生物固定化担体を分離し、分離された微生物固定化
担体を無酸素槽の入口と好気槽の入口へそれぞれ返送す
ることを特徴とするものである。更にまた、第8の発明
は、曝気槽に微生物固定化担体を用いた標準活性汚泥法
による廃水の処理方法であって、曝気槽の出口付近もし
くは曝気槽と沈殿槽との間に遠心分級器を設けて、廃水
中から微生物固定化担体を分離し、分離された微生物固
定化担体を硝化槽の入口へ返送することを特徴とするも
のである。A seventh aspect of the present invention is a method for treating wastewater by an anaerobic / anoxic / aerobic method using a microorganism-immobilized carrier in an anoxic tank and an aerobic tank. A centrifugal classifier is installed between the oxygen tank and the aerobic tank, or near the outlet of the aerobic tank or between the aerobic tank and the precipitation tank to separate the microorganism-immobilized carrier from the wastewater and immobilize the separated microorganisms. The chemical carrier is returned to the inlet of the anoxic tank and the inlet of the aerobic tank, respectively. Furthermore, the eighth invention is a method for treating wastewater by a standard activated sludge method using a microorganism-immobilized carrier in an aeration tank, wherein a centrifugal classifier is provided near the outlet of the aeration tank or between the aeration tank and the sedimentation tank. Is provided to separate the microorganism-immobilized carrier from the wastewater, and the separated microorganism-immobilized carrier is returned to the inlet of the nitrification tank.
【0010】なお、いずれの発明においても分離回収し
た微生物固定化担体の返送にエアリフトポンプを用いる
ことが好ましく、更に遠心分級器を設ける反応槽と次工
程の反応槽との間の落差を1m以下とすることが好まし
い。In any of the inventions, it is preferable to use an air lift pump to return the separated and recovered microorganism-immobilized carrier, and the drop between the reaction tank provided with a centrifugal classifier and the reaction tank of the next step is 1 m or less. It is preferable that
【0011】[0011]
【発明の実施の形態】以下に各発明の好ましい実施の形
態を、図面を参照しつつ説明する。図1は第1の発明を
示すもので、21は微生物固定化担体22が投入された反応
槽、23はその次工程の反応槽、24はそれらの間に設置さ
れた遠心分級器である。反応槽21の水面は反応槽23の水
面よりも低いが、そのレベル差は1m以下とされてい
る。なお、遠心分級器24は反応槽21の槽内出口付近に設
置してもよい。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of each invention will be described below with reference to the drawings. FIG. 1 shows the first aspect of the invention, in which 21 is a reaction tank into which the microorganism-immobilized carrier 22 is charged, 23 is a reaction tank in the next step, and 24 is a centrifugal classifier installed between them. The water surface of the reaction tank 21 is lower than that of the reaction tank 23, but the level difference is 1 m or less. The centrifugal classifier 24 may be installed near the outlet of the reaction tank 21 inside the tank.
【0012】微生物固定化担体22としては、比重が1.02
〜1.1 の範囲内にある粒状体が一般に用いられており、
その粒径は3〜15mm程度が普通である。またその材質
は、ポリビニルアルコール(PVA) 、ポリエチレングリコ
ール(PEG) 等の親水性ゲルのほか、スポンジやプラスチ
ックが用いられる。微生物固定化担体22の表面には、硝
化菌等の微生物が高密度に担持されている。The microorganism immobilization carrier 22 has a specific gravity of 1.02.
Granules within the range of ~ 1.1 are commonly used,
The particle size is usually about 3 to 15 mm. As the material, polyvinyl alcohol (PVA), polyethylene glycol (PEG), or other hydrophilic gel, as well as sponge or plastic are used. On the surface of the microorganism-immobilized carrier 22, microorganisms such as nitrifying bacteria are loaded at high density.
【0013】遠心分級器24は直径Dに対して高さは1/2
〜2 D、流入口26の径は1/8 〜1/3 D、サイフォン管28
の径は1/10〜1/3 D、下部排出口27は1/3 〜1/6D、底
部のテーパ角は45°〜90°である。またサイフォン管28
の下部には廃水が流出する際に発生する強制渦の成長を
妨げるバッフルプレート等の流れを制御する構造物を設
けることが望ましい。その上端付近の流入口26から反応
槽21内の微生物固定化担体22を含んだ廃水が接線方向に
流入し、槽25の内部でゆるやかなボルテックス流れを形
成する。そしてこれにより生じる遠心力(0.5〜1.5 G程
度)により、廃水よりも比重がわずかに大きい微生物固
定化担体22は外側に集まり、槽下部の排出口27から取り
出される。また槽25の中心部には微生物固定化担体22を
ほとんど含まない領域が形成されるので、槽25の中心上
部に設置されたサイフォン管28を利用して、微生物固定
化担体22を含まない廃水のみが反応槽23へ取り出され、
このようにして分離・回収された微生物固定化担体22は
反応槽21の入口もしくはその前工程の反応槽の入口へ返
送され、反応槽21内の微生物固定化担体22の濃度は一定
に維持される。Centrifugal classifier 24 has a height of 1/2 of diameter D
~ 2 D, inlet 26 diameter is 1/8 ~ 1/3 D, siphon tube 28
Has a diameter of 1/10 to 1 / 3D, the lower outlet 27 has a diameter of 1/3 to 1 / 6D, and the taper angle of the bottom is 45 ° to 90 °. Also siphon tube 28
It is desirable to provide a structure for controlling the flow such as a baffle plate that prevents the growth of the forced vortex generated when the wastewater flows out at the lower part of the. Wastewater containing the microorganism-immobilized carrier 22 in the reaction tank 21 flows in tangentially from the inlet 26 near the upper end thereof, and forms a gentle vortex flow inside the tank 25. Then, due to the centrifugal force (about 0.5 to 1.5 G) generated by this, the microorganisms-immobilized carrier 22 having a specific gravity slightly larger than that of the waste water gathers outside and is taken out from the outlet 27 at the bottom of the tank. Further, since a region containing almost no microorganism-immobilized carrier 22 is formed in the center of the tank 25, a siphon pipe 28 installed in the upper center of the tank 25 is used to remove wastewater containing no microorganism-immobilized carrier 22. Only is taken out to the reaction tank 23,
The microorganism-immobilized carrier 22 thus separated and recovered is returned to the inlet of the reaction tank 21 or the inlet of the reaction tank in the previous step, and the concentration of the microorganism-immobilized carrier 22 in the reaction tank 21 is maintained constant. It
【0014】この遠心分級器24内の流れは、反応槽21と
反応槽23との落差によって引起こされるものであるが、
前記したようにこの落差は1m以下とされている。この
ために、遠心分級器24内の流れはゆるやかな流れとな
る。また従来のようにポンプを通過しないので、微生物
固定化担体22が物理的に損傷されることもない。さらに
遠心分級器24は従来のスクリーンのような閉塞によるト
ラブルを招くおそれがないため、メンテナンスの手数が
かからない利点がある。The flow in the centrifugal classifier 24 is caused by the drop between the reaction tank 21 and the reaction tank 23.
As described above, this drop is 1 m or less. Therefore, the flow in the centrifugal classifier 24 becomes a gentle flow. Further, since it does not pass through the pump as in the conventional case, the microorganism-immobilized carrier 22 is not physically damaged. Further, since the centrifugal classifier 24 does not cause troubles due to blockage like a conventional screen, there is an advantage that maintenance work is not required.
【0015】本発明の微生物固定化担体の分離方法は、
維持管理が容易で、大きな動力を必要とせずに微生物固
定化担体の分離回収が可能となり、更にその操作による
担体の損傷をほとんどなくすことが可能となる。The method for separating the microorganism-immobilized carrier of the present invention comprises:
It is easy to maintain and manage, and the microorganism-immobilized carrier can be separated and recovered without requiring a large amount of power, and further, the damage to the carrier due to the operation can be almost eliminated.
【0016】次に第2〜第8の発明の廃水の処理方法の
実施形態を示す。図2は第2の発明の実施形態を示す図
であり、1は生物学的硝化脱窒法のための反応槽であ
り、2の部分が脱窒槽、3の部分が硝化槽、4は沈殿槽
である。第1の発明では硝化槽3に微生物固定化担体5
が投入されている。6は硝化槽2の出口付近に設置され
た遠心分級器である。沈殿槽4の液面は硝化槽3よりも
低いがその落差は1m以下とされている。なお、遠心分
級器6は硝化槽3と沈殿槽4との間に設けることもでき
る。Next, embodiments of the wastewater treatment methods of the second to eighth inventions will be described. FIG. 2 is a view showing an embodiment of the second invention, 1 is a reaction tank for biological nitrification and denitrification, 2 is a denitrification tank, 3 is a nitrification tank, and 4 is a precipitation tank. Is. In the first invention, the microorganism immobilization carrier 5 is added to the nitrification tank 3.
Has been turned on. 6 is a centrifugal classifier installed near the outlet of the nitrification tank 2. The liquid level of the settling tank 4 is lower than that of the nitrification tank 3, but the drop is 1 m or less. The centrifugal classifier 6 may be provided between the nitrification tank 3 and the precipitation tank 4.
【0017】微生物固定化担体5を含んだ硝化槽3内の
廃水が遠心分級器6に流入すると、前記したように微生
物固定化担体5を高密度に含んだ廃水と、微生物固定化
担体5を含まない廃水とに分離される。微生物固定化担
体5を含まない廃水は遠心分級器6の上部のサイフォン
管7より沈殿槽4へ導かれ、微生物固定化担体5を高密
度に含んだ廃水は遠心分級器6の下部の管8より図示し
ないエアリフトポンプで硝化槽3の入口に導かれる。こ
のように分離回収された微生物固定化担体5を硝化槽3
の入口へ返送することにより、硝化槽3内の微生物固定
化担体5の濃度は均一に維持される。沈殿槽4への水量
と硝化槽3の入口への水量の比は、1:0.5 から1:3
が望ましい。なお、微生物固定化担体5を含まない廃水
(硝化液)の一部は返送管9により脱窒槽2の入口に返
送され、硝化液循環による硝化脱窒が行われる。When the wastewater in the nitrification tank 3 containing the microorganism-immobilized carrier 5 flows into the centrifugal classifier 6, the wastewater containing the microorganism-immobilized carrier 5 in a high density and the microorganism-immobilized carrier 5 as described above. Separated into wastewater that does not contain. Waste water containing no microorganism-immobilized carrier 5 is guided to the settling tank 4 from the siphon tube 7 above the centrifugal classifier 6, and waste water containing the microorganism-immobilized carrier 5 at high density is connected to the tube 8 below the centrifugal classifier 6. It is guided to the inlet of the nitrification tank 3 by an air lift pump (not shown). The microorganism-immobilized carrier 5 thus separated and recovered is used in the nitrification tank 3
The concentration of the microorganism-immobilized carrier 5 in the nitrification tank 3 is maintained uniform by returning it to the inlet of the. The ratio of the amount of water to the settling tank 4 and the amount of water to the inlet of the nitrification tank 3 is 1: 0.5 to 1: 3.
Is desirable. A part of the wastewater (nitrification solution) that does not contain the microorganism-immobilized carrier 5 is returned to the entrance of the denitrification tank 2 by the return pipe 9, and nitrification denitrification is performed by circulating the nitrification solution.
【0018】本発明によれば、微生物固定化担体5の分
離回収が可能であり、硝化槽3内の微生物固定化担体5
の濃度を均一に維持して運転ができる。また落差を利用
した遠心分級器6により微生物固定化担体5の分離回収
を行うため、従来のスクリーンを用いた場合とは異なり
維持管理が容易であり、しかも微生物固定化担体5の物
理的損傷をほとんどなくすることができる。According to the present invention, the microorganism-immobilized carrier 5 can be separated and recovered, and the microorganism-immobilized carrier 5 in the nitrification tank 3 can be separated and recovered.
The operation can be performed while maintaining a uniform concentration. Further, since the microorganisms-immobilized carrier 5 is separated and collected by the centrifugal classifier 6 using the head, maintenance and management are easy unlike the case where the conventional screen is used, and moreover the physical damage of the microorganisms-immobilized carrier 5 is prevented. You can almost eliminate it.
【0019】図3は第3の発明の実施形態を示す図であ
り、脱窒槽2と硝化槽3に共通の微生物固定化担体5が
投入されている。硝化槽3の出口付近(もしくは硝化槽
3と沈殿槽4との間)に設けた遠心分級器6によって廃
水中から微生物固定化担体5を分離し、分離された微生
物固定化担体5を脱窒槽2の入口へ返送する。この方法
によれば、第2の発明と同一の効果が得られるほかに、
微生物固定化担体5とともに硝化液も脱窒槽2へ返送さ
れるので、硝化液循環にも利用できる利点がある。FIG. 3 is a view showing an embodiment of the third invention, in which a common microbial immobilization carrier 5 is put in the denitrification tank 2 and the nitrification tank 3. The microorganism immobilization carrier 5 is separated from the wastewater by a centrifugal classifier 6 provided near the outlet of the nitrification tank 3 (or between the nitrification tank 3 and the precipitation tank 4), and the separated microorganism immobilization carrier 5 is denitrified. Return to 2 entrance. According to this method, in addition to the same effect as the second invention,
Since the nitrification solution is returned to the denitrification tank 2 together with the microorganism-immobilized carrier 5, there is an advantage that it can be used for circulation of the nitrification solution.
【0020】図4は第4の発明の実施形態を示す図であ
り、脱窒槽2と硝化槽3にそれぞれの微生物固定化担体
5が投入されている。脱窒槽2の出口付近(もしくは脱
窒槽2と硝化槽3との間)に遠心分級器6aが設けられて
おり、また硝化槽3の出口付近(もしくは硝化槽3と沈
殿槽4との間)にも遠心分級器6bが設けられている。そ
して遠心分級器6aにより廃水中から分離回収した微生物
固定化担体5は脱窒槽2の入口へ返送され、遠心分級器
6bにより廃水中から分離回収した微生物固定化担体5は
硝化槽3の入口へ返送される。この発明では脱窒槽2と
硝化槽3に専用の微生物固定化担体5を使用できる利点
がある。FIG. 4 is a diagram showing an embodiment of the fourth invention, in which the microorganism immobilization carrier 5 is placed in each of the denitrification tank 2 and the nitrification tank 3. A centrifugal classifier 6a is provided near the exit of the denitrification tank 2 (or between the denitrification tank 2 and the nitrification tank 3), and near the exit of the nitrification tank 3 (or between the nitrification tank 3 and the precipitation tank 4). Is also provided with a centrifugal classifier 6b. Then, the microorganism-immobilized carrier 5 separated and collected from the wastewater by the centrifugal classifier 6a is returned to the inlet of the denitrification tank 2, and the centrifugal classifier
The microorganism-immobilized carrier 5 separated and collected from the wastewater by 6b is returned to the entrance of the nitrification tank 3. The present invention has an advantage that a dedicated microorganism immobilization carrier 5 can be used for the denitrification tank 2 and the nitrification tank 3.
【0021】図5は第5の発明の実施形態を示す図であ
り、嫌気・無酸素・好気法による廃水の処理を行うため
の好気槽10に微生物固定化担体5が投入されている。好
気槽10の出口付近(もしくは好気槽10と沈殿槽4との
間)に遠心分級器6を設けてあり、この遠心分級器6に
よって廃水中から回収した微生物固定化担体5は好気槽
10の入口へ返送されている。その作用効果は第2の発明
と基本的に同様である。FIG. 5 is a view showing an embodiment of the fifth invention, in which the microorganism-immobilized carrier 5 is put in an aerobic tank 10 for treating wastewater by an anaerobic / anoxic / aerobic method. . A centrifugal classifier 6 is provided near the outlet of the aerobic tank 10 (or between the aerobic tank 10 and the precipitation tank 4), and the microorganism immobilization carrier 5 recovered from the wastewater by the centrifugal classifier 6 is aerobic. Tank
Returned to 10 entrances. The function and effect are basically the same as those of the second invention.
【0022】図6は第6の発明の実施形態を示す図であ
り、嫌気・無酸素・好気法による廃水の処理を行うため
の無酸素槽11と好気槽10に共通の微生物固定化担体5が
投入されている。第3の発明と同様に、好気槽10の出口
付近(もしくは好気槽10と沈殿槽4との間)に設けた遠
心分級器6によって廃水中から微生物固定化担体5を分
離し、分離された微生物固定化担体5を無酸素槽11の入
口へ返送する。その作用効果は第3の発明と基本的に同
様である。FIG. 6 is a diagram showing an embodiment of the sixth invention, in which microorganisms are commonly immobilized in the anoxic tank 11 and the aerobic tank 10 for treating wastewater by the anaerobic / anoxic / aerobic method. The carrier 5 is loaded. Similar to the third invention, the microorganism immobilization carrier 5 is separated from the wastewater by the centrifugal classifier 6 provided near the outlet of the aerobic tank 10 (or between the aerobic tank 10 and the precipitation tank 4), and separated. The microorganism-immobilized carrier 5 thus prepared is returned to the inlet of the anoxic tank 11. The function and effect are basically the same as those of the third invention.
【0023】図7は第7の発明の実施形態を示す図であ
り、嫌気・無酸素・好気法による廃水の処理を行うため
の無酸素槽11と好気槽10にそれぞれの微生物固定化担体
5が投入されている。そして第4の発明と同様に、無酸
素槽11の出口付近(もしくは無酸素槽11と好気槽10との
間)に遠心分級器6aが設けられており、また好気槽10の
出口付近(もしくは好気槽10と沈殿槽4との間)にも遠
心分級器6bを設けてある。そして遠心分級器6aにより回
収された微生物固定化担体5は無酸素槽11の入口へ返送
し、遠心分級器6bにより回収された微生物固定化担体5
は好気槽10の入口へそれぞれ返送する。その作用効果は
第4の発明と基本的に同様である。FIG. 7 is a diagram showing an embodiment of the seventh invention, in which microorganisms are immobilized in the anoxic tank 11 and the aerobic tank 10 for treating wastewater by the anaerobic / anoxic / aerobic method. The carrier 5 is loaded. As in the fourth aspect, a centrifugal classifier 6a is provided near the outlet of the anoxic tank 11 (or between the anoxic tank 11 and the aerobic tank 10), and near the outlet of the aerobic tank 10. A centrifugal classifier 6b is also provided (or between the aerobic tank 10 and the precipitation tank 4). Then, the microorganism-immobilized carrier 5 recovered by the centrifugal classifier 6a is returned to the inlet of the anoxic tank 11, and the microorganism-immobilized carrier 5 recovered by the centrifugal classifier 6b.
Are returned to the inlet of the aerobic tank 10. The function and effect are basically the same as those of the fourth invention.
【0024】図8は第8の発明の実施形態を示す図であ
り、標準活性汚泥法による廃水の処理を行うための曝気
槽12にそれぞれの微生物固定化担体5が投入されてい
る。そして、曝気槽12の微生物固定化担体5は曝気槽12
の入口へ返送されている。その作用効果は第2の発明と
基本的に同様である。FIG. 8 is a view showing an embodiment of the eighth invention, in which each microorganism immobilization carrier 5 is put in an aeration tank 12 for treating wastewater by the standard activated sludge method. The carrier 5 for immobilizing the microorganisms in the aeration tank 12 is the aeration tank 12
Have been returned to the entrance. The function and effect are basically the same as those of the second invention.
【0025】[0025]
【実施例】(第1の発明の実施例) 平均粒径が4mm、比重1.03 のPVA からなる微生物固定
化担体が10%の濃度で投入された硝化槽の出口付近に、
遠心分級器を設置して微生物固定化担体を分離した。遠
心分級器は直径19cm、高さ17cm、底部のテーパ角60°の
ものであり、硝化槽と沈殿槽との間の落差は50cmであ
る。微生物固定化担体を含有する硝化槽からの廃水は流
量50L/ 分、流速1m/秒で遠心分級器内部に流入し、微
生物固定化担体が分離された廃水は流量25L/ 分で沈殿
槽へ排出された。一方、遠心分級器の槽下部の排出口か
らは微生物固定化担体を20%含有する廃水が取り出さ
れ、槽入口に返送された。この際、この遠心分級器から
微生物固定化担体が流出する割合は0.001 %であり、非
常に高効率で微生物固定化担体の分離が行われた。また
分離された微生物固定化担体を観察したが、全く損傷は
認められなかった。Example (Example of the first invention) In the vicinity of the outlet of a nitrification tank in which a microorganism-immobilized carrier made of PVA having an average particle size of 4 mm and a specific gravity of 1.03 was added at a concentration of 10%,
A centrifugal classifier was installed to separate the microorganism-immobilized carrier. The centrifugal classifier has a diameter of 19 cm, a height of 17 cm, and a taper angle of 60 ° at the bottom, and the drop between the nitrification tank and the precipitation tank is 50 cm. The wastewater from the nitrification tank containing the microorganism-immobilized carrier flows into the centrifugal classifier at a flow rate of 50 L / min and a flow rate of 1 m / sec, and the wastewater from which the microorganism-immobilized carrier is separated is discharged to the sedimentation tank at a flow rate of 25 L / min. Was done. On the other hand, wastewater containing 20% of the microorganism-immobilized carrier was taken out from the outlet of the bottom of the centrifugal classifier and returned to the inlet of the tank. At this time, the ratio of the microorganism-immobilized carrier flowing out from the centrifugal classifier was 0.001%, and the microorganism-immobilized carrier was separated with extremely high efficiency. Moreover, the separated microorganism-immobilized carrier was observed, but no damage was observed at all.
【0026】(第2の発明の実施例)処理量が70L/分の
5段階に分割された容積13m3の硝化槽に、平均粒径4m
m、比重1.03のPVA からなる微生物固定化担体を1.3m3
(硝化槽容積に対して10%) 投入し、出口付近(5段
目)に140L/ 分処理の遠心分級器を設置して微生物固定
化担体を分離した。沈殿槽へ70L/分、硝化槽入口への返
送を70L/分で運転を行ったところ、沈殿槽へ向かう廃水
中への微生物固定化担体の流出率は0.001 %であり、返
送液中の微生物固定化担体の濃度は略20%であった。ま
た硝化槽の各段階の微生物固定化担体の濃度は、1 段目
10.5%、2段目10%、3段目9.5 %、4段目9.5 %、5
段目10.5%でほぼ推移し、硝化槽各部分の微生物固定化
担体の濃度は均一となった。さらに、三ヵ月の連続運転
の後も、微生物固定化担体には全く損傷は認められなか
った。(Embodiment of the second invention) An average particle diameter of 4 m was added to a nitrification tank having a volume of 13 m 3 divided into 5 stages with a treatment amount of 70 L / min.
1.3 m 3 of microorganism-immobilized carrier consisting of PVA with a specific gravity of 1.03
(10% of the volume of the nitrification tank) was charged, and a 140 L / min treatment centrifugal classifier was installed near the outlet (fifth stage) to separate the microorganism-immobilized carrier. When operating at 70 L / min to the settling tank and returning to the nitrification tank inlet at 70 L / min, the outflow rate of the microorganism-immobilized carrier into the wastewater toward the settling tank was 0.001%, and the microorganisms in the returned solution were The concentration of the immobilized carrier was about 20%. The concentration of the microorganism-immobilized carrier at each stage of the nitrification tank is the first stage.
10.5%, 2nd stage 10%, 3rd stage 9.5%, 4th stage 9.5%, 5
The concentration of the microorganism-immobilized carrier in each part of the nitrification tank became uniform at the 10.5% stage. Furthermore, no damage was observed on the microorganism-immobilized carrier even after continuous operation for 3 months.
【0027】(第3の発明の実施例)処理量が70L/分の
3段階に分割された容積8m3の脱窒槽と、5段階に分割
された容量13m3の硝化槽に、平均粒径4mm、比重1.03の
PVA からなる微生物固定化担体を2.1m3 (両槽合計容積
に対して10%) 投入し、硝化槽の出口付近(5段目)に
140L/ 分処理の遠心分級器を設置して微生物固定化担体
を分離した。沈殿槽へ70L/分、脱窒槽入口への返送を70
L/分で運転を行ったところ、沈殿槽へ向かう廃水中への
微生物固定化担体の流出率は0.001 %であり、返送液中
の微生物固定化担体の濃度は略20%であった。また脱窒
槽の各段階の微生物固定化担体の濃度は、1 段目10.5
%、2段目10%、3段目9.5 %、硝化槽の各段階の微生
物固定化担体の濃度は、1 段目10%、2段目10%、3段
目10%、4段目9.5 %、5段目10.5%でほぼ推移し、脱
窒槽、硝化槽各部分の微生物固定化担体の濃度は均一と
なった。なお、3ヵ月の連続運転の後も、微生物固定化
担体には全く損傷は認められなかった。(Embodiment of the third invention) An average particle size is applied to a denitrification tank having a volume of 8 m 3 divided into three stages of a treatment amount of 70 L / min and a nitrification tank having a volume of 13 m 3 divided into five stages. 4mm, specific gravity 1.03
2.1m 3 (10% of the total volume of both tanks) of microorganism-immobilized carrier consisting of PVA was added, and it was near the exit of the nitrification tank (5th stage).
A 140 L / min treatment centrifugal classifier was installed to separate the microorganism-immobilized carrier. 70 L / min to settling tank, 70 to return to denitrification tank inlet
When operated at L / min, the outflow rate of the microorganism-immobilized carrier into the wastewater toward the settling tank was 0.001%, and the concentration of the microorganism-immobilized carrier in the returned liquid was approximately 20%. The concentration of the microorganism-immobilized carrier at each stage of the denitrification tank is 10.5
%, 2nd stage 10%, 3rd stage 9.5%, the concentration of the microbial immobilization carrier at each stage of the nitrification tank is 1st stage 10%, 2nd stage 10%, 3rd stage 10%, 4th stage 9.5 %, It was almost unchanged at the 5th stage 10.5%, and the concentration of the microorganism-immobilized carrier in each part of the denitrification tank and the nitrification tank became uniform. Even after continuous operation for 3 months, no damage was found on the microorganism-immobilized carrier.
【0028】[0028]
【発明の効果】以上に説明したように、第1の発明の微
生物固定化担体の分離方法によれば、微生物固定化担体
を損傷させることなく廃水から分離することができる。
また従来のスクリーンによる分離方法とは異なり目詰ま
りするおそれが皆無であるのでメンテナンスの手数がか
からず、ポンプを必要としないのでランニングコストも
かからない利点がある。更に沈殿部を槽内に設ける必要
もないので、広いスペースも不要である等の多くの利点
を有するものである。また第2〜第8の各発明の廃水の
処理方法によれば、廃水中の微生物固定化担体を回収し
て返送することにより、反応槽内の微生物固定化担体の
濃度を均一に保つことができる利点がある。As described above, according to the method for separating a microorganism-immobilized carrier of the first invention, the microorganism-immobilized carrier can be separated from wastewater without damaging the microorganism-immobilized carrier.
In addition, unlike the conventional screen separation method, there is no risk of clogging, so there is no need for maintenance, and there is an advantage that no running cost is required because a pump is not required. Further, since it is not necessary to provide a settling section in the tank, it has many advantages such as not requiring a large space. According to the wastewater treatment methods of the second to eighth inventions, the concentration of the microorganism-immobilized carrier in the reaction tank can be kept uniform by collecting and returning the microorganism-immobilized carrier in the wastewater. There are advantages.
【図1】第1の発明の実施形態を示すフローシートであ
る。FIG. 1 is a flow sheet showing an embodiment of a first invention.
【図2】第2の発明の実施形態を示すフローシートであ
る。FIG. 2 is a flow sheet showing an embodiment of the second invention.
【図3】第3の発明の実施形態を示すフローシートであ
る。FIG. 3 is a flow sheet showing an embodiment of a third invention.
【図4】第4の発明の実施形態を示すフローシートであ
る。FIG. 4 is a flow sheet showing an embodiment of a fourth invention.
【図5】第5の発明の実施形態を示すフローシートであ
る。FIG. 5 is a flow sheet showing an embodiment of the fifth invention.
【図6】第6の発明の実施形態を示すフローシートであ
る。FIG. 6 is a flow sheet showing an embodiment of the sixth invention.
【図7】第7の発明の実施形態を示すフローシートであ
る。FIG. 7 is a flow sheet showing an embodiment of a seventh invention.
【図8】第8の発明の実施形態を示すフローシートであ
る。FIG. 8 is a flow sheet showing an embodiment of the eighth invention.
1 反応槽、2 脱窒槽、3 硝化槽、4 沈殿槽、5
微生物固定化担体、6 遠心分級器、6a 遠心分級
器、6b 遠心分級器、7 サイフォン管、8 担体返送
管、9 硝化液の返送管、10 好気槽、11 無酸素槽、
12 曝気槽、21反応槽、22 微生物固定化担体、23 次
工程の反応槽、24 遠心分級器、25 槽、26 流入口、
27 排出口、28 サイフォン管1 reaction tank, 2 denitrification tank, 3 nitrification tank, 4 precipitation tank, 5
Microorganism immobilization carrier, 6 centrifugal classifier, 6a centrifugal classifier, 6b centrifugal classifier, 7 siphon tube, 8 carrier return tube, 9 nitrification solution return tube, 10 aerobic tank, 11 anoxic tank,
12 aeration tank, 21 reaction tank, 22 microbial immobilization carrier, 23 next step reaction tank, 24 centrifugal classifier, 25 tank, 26 inlet,
27 outlet, 28 siphon tube
Claims (11)
次工程の反応槽との間に遠心分級器を設け、両反応槽間
の落差により生じる遠心分級器内のゆるやかな流れを利
用して微生物固定化担体を廃水から分離回収することを
特徴とする微生物固定化担体の分離方法。1. A reaction tank containing a microorganism-immobilized carrier,
It is characterized in that a centrifugal classifier is provided between the reaction tank of the next step and the microorganism-immobilized carrier is separated and recovered from wastewater by utilizing the gentle flow in the centrifugal classifier caused by the drop between both reaction tanks. A method for separating a microorganism-immobilized carrier.
的硝化脱窒法による廃水の処理方法であって、硝化槽の
出口付近もしくは硝化槽と沈殿槽との間に遠心分級器を
設けて廃水中から微生物固定化担体を分離し、分離され
た微生物固定化担体を硝化槽の入口へ返送することを特
徴とする廃水の処理方法。2. A method for treating wastewater by a biological nitrification denitrification method using a microorganism-immobilized carrier in a nitrification tank, wherein a centrifugal classifier is provided near the outlet of the nitrification tank or between the nitrification tank and the precipitation tank. A method for treating wastewater, comprising separating the microorganism-immobilized carrier from the wastewater and returning the separated microorganism-immobilized carrier to the inlet of the nitrification tank.
た生物学的硝化脱窒法による廃水の処理方法であって、
硝化槽の出口付近もしくは硝化槽と沈殿槽との間に遠心
分級器を設けて廃水中から微生物固定化担体を分離し、
分離された微生物固定化担体を脱窒槽の入口へ返送する
ことを特徴とする廃水の処理方法。3. A method for treating wastewater by a biological nitrification denitrification method using a microorganism-immobilized carrier in a denitrification tank and a nitrification tank,
A centrifugal classifier is provided near the outlet of the nitrification tank or between the nitrification tank and the precipitation tank to separate the microorganism-immobilized carrier from the wastewater.
A method for treating wastewater, which comprises returning the separated microorganism-immobilized carrier to the inlet of a denitrification tank.
た生物学的硝化脱窒法による廃水の処理方法であって、
脱窒槽の出口付近もしくは脱窒槽と硝化槽との間、およ
び硝化槽の出口付近もしくは硝化槽と沈殿槽との間にそ
れぞれ遠心分級器を設けて廃水中から微生物固定化担体
を分離し、分離された微生物固定化担体を脱窒槽の入口
と硝化槽の入口へそれぞれ返送することを特徴とする廃
水の処理方法。4. A method for treating wastewater by a biological nitrification denitrification method using a microorganism-immobilized carrier in a denitrification tank and a nitrification tank,
Centrifugal classifiers are installed near the outlet of the denitrification tank or between the denitrification tank and the nitrification tank, and between the outlet of the nitrification tank or between the nitrification tank and the precipitation tank to separate the microorganism-immobilized carrier from the wastewater and separate it. A method for treating wastewater, which comprises returning the immobilized microorganism-supporting carrier to the entrance of the denitrification tank and the entrance of the nitrification tank, respectively.
無酸素・好気法による廃水の処理方法であって、好気槽
の出口付近もしくは好気槽と沈殿槽との間に遠心分級器
を設けて廃水中から微生物固定化担体を分離し、分離さ
れた微生物固定化担体を好気槽の入口へ返送することを
特徴とする廃水の処理方法。5. Anaerobic using a microorganism-immobilized carrier in an aerobic tank.
A method for treating wastewater by the anoxic / aerobic method, in which a microorganism-immobilized carrier is separated from the wastewater by installing a centrifugal classifier near the outlet of the aerobic tank or between the aerobic tank and the precipitation tank. A method for treating wastewater, which comprises returning the immobilized microorganism-supporting carrier to the inlet of an aerobic tank.
いた嫌気・無酸素・好気法による廃水の処理方法であっ
て、好気槽の出口付近もしくは好気槽と沈殿槽との間に
遠心分級器を設けて廃水中から微生物固定化担体を分離
し、分離された微生物固定化担体を無酸素槽の入口へ返
送することを特徴とする廃水の処理方法。6. A method for treating wastewater by an anaerobic / anoxic / aerobic method using a microorganism-immobilized carrier in an anoxic tank and an aerobic tank, which is near the outlet of the aerobic tank or an aerobic tank and a precipitation tank. A method for treating wastewater, characterized in that a centrifugal classifier is provided between the separator and the separator to separate the microorganism-immobilized carrier from the wastewater, and the separated microorganism-immobilized carrier is returned to the inlet of the anoxic tank.
いた嫌気・無酸素・好気法による廃水の処理方法であっ
て、無酸素槽の出口付近もしくは無酸素槽と好気槽との
間、および好気槽の出口付近もしくは好気槽と沈殿槽と
の間に遠心分級器を設けて廃水中から微生物固定化担体
を分離し、分離された微生物固定化担体を無酸素槽の入
口と好気槽の入口へそれぞれ返送することを特徴とする
廃水の処理方法。7. A method for treating wastewater by an anaerobic / anoxic / aerobic method using a microorganism-immobilized carrier in an anoxic tank and an aerobic tank, the method being in the vicinity of the outlet of the anoxic tank or in the anoxic tank and aerobic. A centrifugal classifier is installed between the tank and near the outlet of the aerobic tank or between the aerobic tank and the precipitation tank to separate the microorganism-immobilized carrier from the wastewater, and the separated microorganism-immobilized carrier is anoxic. A method for treating wastewater, characterized in that the wastewater is returned to the inlet of the tank and the inlet of the aerobic tank.
性汚泥法による廃水の処理方法であって、曝気槽の出口
付近もしくは曝気槽と沈殿槽との間に遠心分級器を設け
て、廃水中から微生物固定化担体を分離し、分離された
微生物固定化担体を硝化槽の入口へ返送することを特徴
とする廃水の処理方法。8. A method for treating wastewater by a standard activated sludge method using a microorganism-immobilized carrier in an aeration tank, wherein a centrifugal classifier is provided near the outlet of the aeration tank or between the aeration tank and the sedimentation tank. A method for treating wastewater, which comprises separating a microorganism-immobilized carrier from wastewater and returning the separated microorganism-immobilized carrier to the inlet of a nitrification tank.
アリフトポンプを用いた請求項2〜8のいずれかに記載
の廃水の処理方法。9. The method for treating wastewater according to claim 2, wherein an air lift pump is used to return the separated and recovered microorganism-immobilized carrier.
応槽との落差を1m以下とする請求項1に記載の微生物
固定化担体の分離方法。10. The method for separating a microorganism-immobilized carrier according to claim 1, wherein the difference between the reaction tank provided with the centrifugal classifier and the reaction tank in the next step is 1 m or less.
応槽との間の落差を1m以下とする請求項2〜9のいず
れかに記載の廃水の処理方法。11. The method for treating wastewater according to claim 2, wherein the drop between the reaction tank provided with the centrifugal separator and the reaction tank used in the next step is 1 m or less.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP6770796A JP3171553B2 (en) | 1996-02-16 | 1996-03-25 | Method for separating microorganism-immobilized carrier and method for treating wastewater using the same |
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP8-29134 | 1996-02-16 | ||
JP2913496 | 1996-02-16 | ||
JP6770796A JP3171553B2 (en) | 1996-02-16 | 1996-03-25 | Method for separating microorganism-immobilized carrier and method for treating wastewater using the same |
Publications (2)
Publication Number | Publication Date |
---|---|
JPH09276884A true JPH09276884A (en) | 1997-10-28 |
JP3171553B2 JP3171553B2 (en) | 2001-05-28 |
Family
ID=26367287
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP6770796A Expired - Fee Related JP3171553B2 (en) | 1996-02-16 | 1996-03-25 | Method for separating microorganism-immobilized carrier and method for treating wastewater using the same |
Country Status (1)
Country | Link |
---|---|
JP (1) | JP3171553B2 (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2003080284A (en) * | 2001-09-14 | 2003-03-18 | Sumitomo Heavy Ind Ltd | Wastewater treatment equipment |
JP2011507682A (en) * | 2007-12-19 | 2011-03-10 | サウジ アラビアン オイル カンパニー | Suspended solvent granular activated carbon membrane bioreactor system and process |
JP2012501845A (en) * | 2008-09-12 | 2012-01-26 | ツィクラー−シュトゥルツ・アップヴァッサーテヒニク・ゲゼルシャフト・ミト・ベシュレンクテル・ハフツング | Ammonium-containing wastewater treatment method |
-
1996
- 1996-03-25 JP JP6770796A patent/JP3171553B2/en not_active Expired - Fee Related
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2003080284A (en) * | 2001-09-14 | 2003-03-18 | Sumitomo Heavy Ind Ltd | Wastewater treatment equipment |
JP2011507682A (en) * | 2007-12-19 | 2011-03-10 | サウジ アラビアン オイル カンパニー | Suspended solvent granular activated carbon membrane bioreactor system and process |
JP2012501845A (en) * | 2008-09-12 | 2012-01-26 | ツィクラー−シュトゥルツ・アップヴァッサーテヒニク・ゲゼルシャフト・ミト・ベシュレンクテル・ハフツング | Ammonium-containing wastewater treatment method |
Also Published As
Publication number | Publication date |
---|---|
JP3171553B2 (en) | 2001-05-28 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US7270750B2 (en) | Clarifier recycle system design for use in wastewater treatment system | |
CN208500658U (en) | Water treatment system with membrane bioreactor | |
CN213141737U (en) | District sewage integration high efficiency processing system | |
JP3841394B2 (en) | High concentration organic wastewater treatment method and equipment | |
JP3171553B2 (en) | Method for separating microorganism-immobilized carrier and method for treating wastewater using the same | |
JP3737288B2 (en) | Wastewater treatment system | |
WO2021074307A1 (en) | Wastewater treatment system | |
JP2005313081A (en) | Water treatment apparatus | |
JP3263267B2 (en) | Septic tank | |
CN111847765B (en) | District sewage integration high efficiency processing system | |
JP2000140883A (en) | Primary treatment of organic sewage and device therefor | |
JP2579122B2 (en) | Wastewater treatment equipment | |
JPH11290882A (en) | Nitrogen removing apparatus | |
JP4926349B2 (en) | Wastewater treatment equipment | |
JP2003010871A (en) | Sewage treatment apparatus and its operating method | |
JPH08224588A (en) | Biological treatment utilizing carrier stuck with microorganism and device therefor | |
JPH0210719B2 (en) | ||
KR100685411B1 (en) | Apparatus for treating wastewater using membrane | |
JPH0975994A (en) | Biological waste water treating device | |
JP3155457B2 (en) | Wastewater treatment equipment | |
JP3250042B2 (en) | Wastewater treatment equipment | |
JP2003181483A (en) | Method for treating septic tank and the septic tank | |
JPH0128870Y2 (en) | ||
JP2644103B2 (en) | Septic tank | |
JPH0128868Y2 (en) |
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: 20010306 |
|
LAPS | Cancellation because of no payment of annual fees |