JPH09323091A - Aerobic treating device - Google Patents

Aerobic treating device

Info

Publication number
JPH09323091A
JPH09323091A JP16249496A JP16249496A JPH09323091A JP H09323091 A JPH09323091 A JP H09323091A JP 16249496 A JP16249496 A JP 16249496A JP 16249496 A JP16249496 A JP 16249496A JP H09323091 A JPH09323091 A JP H09323091A
Authority
JP
Japan
Prior art keywords
activated sludge
aeration tank
treated water
tank
water
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP16249496A
Other languages
Japanese (ja)
Inventor
Tetsuo Okura
鉄雄 大倉
Hidemi Honma
秀實 本間
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.)
Hymo Corp
Original Assignee
Hymo Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Hymo Corp filed Critical Hymo Corp
Priority to JP16249496A priority Critical patent/JPH09323091A/en
Publication of JPH09323091A publication Critical patent/JPH09323091A/en
Pending legal-status Critical Current

Links

Classifications

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

Landscapes

  • Biological Treatment Of Waste Water (AREA)
  • Activated Sludge Processes (AREA)

Abstract

PROBLEM TO BE SOLVED: To provide an aerobic treating device capable of supplying a purified water meeting the waste water quality standards by treating a high-COD raw water with a microorganism carrier in the preceding aeration tank and treating the secondarily-treated low-BOD water with activated sludge in the succeeding aeration tank. SOLUTION: An aeration tank 1 constituting a fluidized-bed biological treating device for treating raw water with a microorganism carrier 6 is arranged in the preceding stage of an aerobic treating device and an aeration tank 2 constituting an activated-sludge treating device for the treatment with activated sludge 16 in the succeeding stage. The treated water overflowing the partition wall 22 of the aeration tank 2 is introduced into an activated sludge settling tank 3 to settle the activated sludge 16 contained in the treated water. A part of the activated sludge 16 settled in the tank 3 is fed back to the aeration tank 2 by an activated sludge return device.

Description

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

【０００１】[0001]

【発明の属する技術分野】この発明は、産業排水、屎
尿、家庭雑排水、レストラン厨房雑排水等の原水を処理
するための好気性生物処理装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an aerobic biological treatment device for treating raw water such as industrial wastewater, human waste, domestic gray water, and restaurant kitchen gray water.

【０００２】[0002]

【従来の技術】現在、施工されている浄化槽、合併処理
浄化槽等については、建築基準法に定められた規定に基
づいて各メーカは設計し、施工しているのが現状であ
る。これらの浄化槽としては、浄化槽内に曝気室を設け
ただけのものであり、廃水を処理する方法としては、長
時間曝気方式、接触曝気方式等が利用されている。従
来、工業廃水、汚水、汚泥等の廃水を処理する方法とし
ては、標準活性汚泥法、接触酸化法、これらの両者の方
法を併用した方法、流動担体生物処理法、及び流動担体
生物処理法と接触酸化法とを併用した方法がある。2. Description of the Related Art Currently, each maker designs and constructs septic tanks, combined treatment septic tanks, etc., which are being constructed, in accordance with the regulations stipulated in the Building Standards Act. As these septic tanks, only an aeration chamber is provided in the septic tank, and as a method for treating wastewater, a long-time aeration method, a contact aeration method, etc. are used. Conventionally, as a method of treating wastewater such as industrial wastewater, sewage, and sludge, a standard activated sludge method, a catalytic oxidation method, a method combining both methods, a fluid carrier biological treatment method, and a fluid carrier biological treatment method. There is a method that uses the catalytic oxidation method together.

【０００３】また、活性汚泥法で原水を処理するために
は、曝気槽と沈殿槽をペアにして設置する必要がある
が、原水の処理効率をアップするために、活性汚泥法装
置を直列に二段設置した二段式活性汚泥法装置は知られ
ている。Further, in order to treat raw water by the activated sludge method, it is necessary to install an aeration tank and a settling tank as a pair, but in order to improve the treatment efficiency of the raw water, the activated sludge method devices are connected in series. A two-stage activated sludge method device installed in two stages is known.

【０００４】[0004]

【発明が解決しようとする課題】しかしながら、二段式
活性汚泥法装置は、原水の処理効率をアップすることが
できるが、活性汚泥を沈降させるための沈殿槽が二槽必
要になり、設置スペースが大きくなり、設備費が高くな
るという問題がある。また、曝気槽内で流動させる活性
汚泥は、ＢＯＤが高負荷では、バルキング現象を起こし
易いという問題がある。バルキングとは、汚泥が嵩張っ
て沈降汚泥の濃度が低下する現象であるが、沈降汚泥の
濃度が低下すると、活性汚泥を曝気槽にフィードバック
する返送汚泥の濃度が低下し、同一量の活性汚泥をフィ
ードバックするためのポンプ能力を増加する必要があ
り、沈殿槽の容積も大型に構成する必要がある。従っ
て、二段式活性汚泥法装置は、第１段目はＢＯＤが高負
荷であるので、バルキング現象の発生を防止する対策を
施すため、沈殿槽を大きくし、返送ポンプの能力を増大
させる必要があり、設備費が高価に成る要因となってい
た。However, the two-stage type activated sludge method device can improve the treatment efficiency of raw water, but it requires two settling tanks for settling the activated sludge, which requires an installation space. Is large and the equipment cost is high. In addition, activated sludge that is made to flow in the aeration tank has a problem that the bulking phenomenon easily occurs when the BOD is high. Bulking is a phenomenon in which sludge becomes bulky and the concentration of settled sludge decreases, but when the concentration of settled sludge decreases, the concentration of return sludge that feeds the activated sludge back to the aeration tank decreases, and the same amount of activated sludge is reduced. It is necessary to increase the pumping capacity for feeding back, and it is also necessary to configure the settling tank with a large volume. Therefore, in the two-stage activated sludge method, the BOD has a high load in the first stage, so in order to take measures to prevent the occurrence of the bulking phenomenon, it is necessary to enlarge the settling tank and increase the capacity of the return pump. Therefore, the equipment cost was high.

【０００５】そこで、廃水の生物処理装置として、バル
キングを起こさない処理方法として、微生物担体を用い
る処理方法が考えられるが、微生物担体を用いた場合に
は、廃水或いは処理水から微生物担体を分離するため、
従来は沈降分離法が用いられていたが、微生物担体を沈
降させるため、曝気槽を大型化して沈降分離室を設ける
必要があり、曝気槽自体をコンパクトに作製することが
困難である。Therefore, as a biological treatment apparatus for waste water, a treatment method using a microbial carrier can be considered as a treatment method that does not cause bulking. When a microbial carrier is used, the microbial carrier is separated from the waste water or the treated water. For,
Although the sedimentation separation method has been conventionally used, it is necessary to enlarge the aeration tank to provide a sedimentation separation chamber in order to sediment the microbial carrier, and it is difficult to make the aeration tank itself compact.

【０００６】また、実際に排出される廃水は、計画汚水
濃度よりも相当に高い濃度で排出されている場合がかな
りある。そのため、現行の設備では負荷が高過ぎて規制
された基準値の処理水が得られないことがある。このよ
うな状態は一般家庭の生活排水では余り見られないが、
工業廃水、ホテル、レストラン等の厨房排水の曝気槽に
ついては、一般の数倍〜数十倍の負荷量で流出される場
合が多く、それ故に、上記の曝気槽内に曝気室を設けた
だけのものである長時間曝気方式、接触曝気方式等で
は、高ＢＯＤ容積負荷には不向きであり、規制された基
準値の処理水が得られなく、問題点を有している。ま
た、上記の汚水、汚泥等の被処理物を処理する方法にお
いて、標準活性汚泥法、接触酸化法、この両者の方法を
併用した方法については、被処理物の高濃度及び高負荷
処理には不適なものである。[0006] Further, the wastewater actually discharged is often discharged at a concentration considerably higher than the planned sewage concentration. Therefore, the current equipment may have too high a load to obtain the regulated standard value of treated water. This condition is rarely found in domestic household wastewater,
Aeration tanks for industrial wastewater, kitchen wastewater from hotels, restaurants, etc. are often discharged with a load several times to several tens of times that of ordinary ones. Therefore, only an aeration chamber is provided in the above aeration tanks. The long-term aeration method, the contact aeration method, and the like, which are the ones described above, are not suitable for high BOD volumetric load, and the treated water having a regulated reference value cannot be obtained, which is a problem. Further, in the method of treating the above-mentioned wastewater, sludge and the like to be treated, the standard activated sludge method, the contact oxidation method, the method of using both of these methods, in combination with high concentration and high load treatment of the object It is unsuitable.

【０００７】また、流動床式生物処理法は、曝気槽内に
砂やアンスラサイト、活性炭等の微粒子を流動状態に維
持して、前記微粒子の表面に微生物膜をそれぞれ形成さ
せ、前記微生物膜を形成した担体に廃水（即ち原水）を
接触させて廃水中の有機物を生物学的に分解して廃水の
浄化を行う方法である。廃水の処理方式としては、接触
酸化法や回転円板法、散水濾床法等と同様に、微生物膜
処理方法がある。このような処理方法による装置の処理
能力は、単位曝気槽容積当たりに維持されている微生物
膜の総表面積の広さにより決定され、従来の接触酸化法
等の微生物膜法では、生物処理装置における容積１ｍ3
当たりの表面積（ＡＶ値）は、１００〜２００ｍ2 ／ｍ
3 であるのに対し、微粒子を流動させる流動床式生物処
理では、使用する担体の粒径、量を変えることにより、
５００〜２０００ｍ2 ／ｍ3 の高い値を得ることができ
る。また、従来の接触酸化法は、ＢＯＤ容積負荷が０．
３〜０．５ｋｇ／ｍ3 ・日に過ぎないのに対し、流動床
式生物処理法は、ＢＯＤ容積負荷が２〜１０ｋｇ／ｍ3
・日のような大きな値を取ることができ、流動床式生物
処理装置の小型化、装置スペースを小さくすることがで
き、装置そのものの製造コストを安価にすることができ
る。In the fluidized bed biological treatment method, fine particles such as sand, anthracite, and activated carbon are maintained in a fluidized state in an aeration tank to form a microbial film on the surface of each of the fine particles. In this method, wastewater (that is, raw water) is brought into contact with the formed carrier to biologically decompose organic substances in the wastewater to purify the wastewater. As a wastewater treatment method, there is a microbial membrane treatment method as in the catalytic oxidation method, the rotating disk method, the sprinkling filter method and the like. The treatment capacity of the apparatus by such a treatment method is determined by the total surface area of the microbial membrane maintained per unit aeration tank volume, and in the microbial membrane method such as the conventional catalytic oxidation method, Volume 1 m 3
Surface area (AV value) per unit is 100 to 200 m 2 / m
On the other hand, in the fluidized bed type biological treatment in which fine particles are fluidized, by changing the particle size and amount of the carrier used,
A high value of 500 to 2000 m 2 / m 3 can be obtained. In addition, the conventional catalytic oxidation method has a BOD volume load of 0.
3 to 0.5 kg / m 3 · day, whereas the fluidized bed biotreatment method has a BOD volume load of 2 to 10 kg / m 3
-A large value such as a day can be taken, the fluidized bed type biological treatment apparatus can be downsized, the apparatus space can be reduced, and the manufacturing cost of the apparatus itself can be reduced.

【０００８】また、流動床式生物処理装置において、使
用する担体としては、種々のものが使用されているが、
従来の流動床式生物処理装置では、曝気槽即ち反応槽外
への担体の流出を阻止するために、装置内で担体を処理
水から沈降分離即ち重力分離し、分離した担体を反応槽
内に返送する装置を設けなければならず、低濃度の廃水
を高負荷処理する場合には、上記のように、担体と処理
水との分離装置や返送装置が大型化し、流動床式生物処
理装置の本来のメリットが無くなる。また、担体とし
て、砂のような比重の大きいものを使用すると、該担体
を廃水中で流動させるには、それらの流動力を大きくす
るため、エアリフト管や攪拌機を用いる必要があり、機
械的エネルギーも大きくなり、装置そのものが複雑な構
造になるばかりでなく、廃水の処理のためのランニング
コストもアップするという問題が生じる。Various carriers are used as the carrier in the fluidized bed type biological treatment apparatus.
In the conventional fluidized bed biological treatment apparatus, in order to prevent the carrier from flowing out of the aeration tank, that is, the reaction tank, the carrier is separated from the treated water by sedimentation or gravity separation in the apparatus, and the separated carrier is placed in the reaction tank. A device for returning must be provided, and in the case of treating low-concentration wastewater under high load, as described above, the separation device for the carrier and the treated water and the returning device become large, and The original merit disappears. When a carrier having a large specific gravity such as sand is used as the carrier, it is necessary to use an air lift pipe or a stirrer in order to increase the fluidity of the carrier in order to flow the carrier in the waste water, and mechanical energy is required. However, not only does the device itself have a complicated structure, but the running cost for treating the wastewater also increases.

【０００９】そこで、本出願人は、廃水の生物処理装置
において、廃水や処理水から微生物担体を分離するた
め、曝気槽の流出口にスリットを設け、格子の設置のた
めの場所をとらず、曝気槽自体をコンパクトに構成で
き、更に、スリットを形成する格子を曝気槽の流出口に
設ける場合の条件について特定の関係を持たした廃水の
生物処理装置を開発し、特願平７−２０８５０４号とし
て先に出願した。Therefore, the applicant of the present invention has provided a slit in the outlet of the aeration tank in order to separate the microorganism carrier from the wastewater or the treated water in the biological treatment apparatus for wastewater, and does not occupy a place for installing a lattice. The aeration tank itself can be constructed compactly, and further, a biological treatment apparatus for wastewater having a specific relationship regarding conditions when a slit-forming grid is provided at the outlet of the aeration tank was developed, and Japanese Patent Application No. 7-208504. Filed earlier.

【００１０】[0010]

【課題を解決するための手段】この発明の目的は、上記
の問題を解決するため、微生物担体を用いて曝気槽内で
廃水を流動させ、処理装置そのものをコンパクトに構成
し、廃水の高濃度及び高負荷処理に適し且つ廃水の有機
物濃度すなわちＢＯＤ、ＣＯＤ等を低減させ、曝気槽か
ら微生物担体が流出するのを防止し、微生物担体の曝気
槽内での浄化作用を発揮させた流動床式生物処理装置
と、該流動床式生物処理装置によって原水のＢＯＤ負荷
を低減し、その低減した処理水を活性汚泥を用いて浄化
し、バルキング現象の発生を防止した活性汚泥法装置と
を組み合わせることにより、高負荷の汚水、排水等の廃
水を浄化処理し、規定の処理水即ち浄化水を得ることが
できる好気性生物処理装置を提供することである。In order to solve the above problems, an object of the present invention is to make wastewater flow in an aeration tank by using a microbial carrier, to make the treatment apparatus compact in size, and to have a high concentration of wastewater. Also, it is suitable for high-load treatment and reduces the organic matter concentration of wastewater, that is, BOD, COD, etc., prevents the microbial carrier from flowing out from the aeration tank, and exerts a purification action of the microbial carrier in the aeration tank. Combining a biological treatment device and an activated sludge method device that reduces the BOD load of raw water by the fluidized bed type biological treatment device, purifies the reduced treated water using activated sludge, and prevents the occurrence of a bulking phenomenon Accordingly, it is an object of the present invention to provide an aerobic biological treatment device that can purify wastewater such as high-load sewage and wastewater to obtain prescribed treated water, that is, purified water.

【００１１】この発明は、原水を受け入れる流入口を有
し且つ微生物担体と共に原水を流動させて原水を浄化し
た第１処理水とする流動床式生物処理装置を構成する第
１曝気槽、前記微生物担体を前記第１曝気槽内に滞留さ
せて前記第１処理水を排出するため前記微生物担体と前
記第１処理水とを分離する前記第１曝気槽の流出口に設
けた格子、前記格子を通過した前記第１処理水を受け入
れる流入口を有し且つ前記第１処理水を活性汚泥と共に
流動させて第１処理水を浄化して第２処理水にする活性
汚泥法処理装置を構成する第２曝気槽、前記第２曝気槽
で浄化された前記第２処理水を越流させて排出する前記
第２曝気槽の流出口に設けた越流隔壁、前記越流隔壁を
越流した前記第２処理水を受け入れて前記第２処理水中
の含まれる活性汚泥を沈降させて前記第２処理水を浄化
水にする活性汚泥沈殿槽、前記活性汚泥沈殿槽に沈降し
た活性汚泥の一部を前記第２曝気槽にフィードバックさ
せる活性汚泥返送装置、及び前記活性汚泥沈殿槽の流出
口に設けた越流隔壁を越流した浄化水を排出する流出ト
ラフ、から成る好気性生物処理装置に関する。According to the present invention, there is provided a first aeration tank comprising a fluidized bed type biological treatment apparatus which has an inflow port for receiving raw water and which fluidizes the raw water together with a microbial carrier to make the first treated water purified. A grid provided at the outlet of the first aeration tank for separating the microbial carrier and the first treated water to allow the carrier to stay in the first aeration tank and discharge the first treated water; An activated sludge method treatment device having an inlet for receiving the passed first treated water and configured to flow the first treated water together with the activated sludge to purify the first treated water into the second treated water. 2 aeration tank, an overflow partition provided at the outlet of the second aeration tank that overflows and discharges the second treated water purified in the second aeration tank, the first overflowing the overflow partition 2 Treated water is received and the activated soil contained in the second treated water Activated sludge settling tank for converting the second treated water to purified water, an activated sludge returning device for feeding back a part of the activated sludge settling in the activated sludge settling tank to the second aeration tank, and the activated sludge The present invention relates to an aerobic biological treatment device including an outflow trough that discharges purified water that overflows an overflow partition provided at an outlet of a sedimentation tank.

【００１２】また、この好気性生物処理装置は、前記第
１曝気室及び前記第２曝気室内には、散気管及び前記散
気管へガスを供給するガス供給装置を設けたものであ
る。Further, in this aerobic biological treatment apparatus, an air diffuser and a gas supply device for supplying gas to the air diffuser are provided in the first aeration chamber and the second aeration chamber.

【００１３】また、前記流出口に取付け取外し可能に固
定された前記格子で形成されたスリットは、前記曝気室
内の液面に対して垂直方向に順次並列に延びている。更
に、前記微生物担体の比重が０．８〜１．２である。ま
た、前記微生物担体は自重の５倍以上の水を含有した含
水ゲルが好ましく、特に、前記微生物担体はカチオン性
の高吸水樹脂から構成されることが好ましく、この他、
スポンジやプラスチック材等も使用できる。The slits formed by the lattice fixed to the outflow port so as to be detachably fixed extend in parallel in the vertical direction to the liquid level in the aeration chamber. Further, the specific gravity of the microorganism carrier is 0.8 to 1.2. The microbial carrier is preferably a hydrogel containing 5 times or more of its own weight of water, and in particular, the microbial carrier is preferably composed of a cationic highly water-absorbing resin.
Sponge or plastic material can also be used.

【００１４】また、前記スリットの目が液面に対して垂
直方向に延びているので、前記スリットの表面を前記微
生物担体、気泡や水流の流れが前記スリットの目の延び
る方向と同一方向であるので、前記微生物担体、気泡或
いは廃水が前記スリットの目詰まり部分に衝突し、前記
スリットの清掃機能を果たすことになり、前記スリット
に対する前記微生物担体、廃水（原水）と共に曝気槽内
に流入する粗大な粒子、異物による目詰まりを防止する
ことができる。Further, since the eyes of the slit extend in the direction perpendicular to the liquid surface, the flow of the microorganism carrier, air bubbles or water flow on the surface of the slit is in the same direction as the direction in which the eyes of the slit extend. Therefore, the microbial carrier, air bubbles or waste water collides with the clogging part of the slit and fulfills the cleaning function of the slit, and the microbial carrier for the slit and waste water (raw water) flow into the aeration tank together with the coarse particles. It is possible to prevent clogging due to various particles and foreign matter.

【００１５】この好気性生物処理装置は、上記のよう
に、スリットによる担体分離を行う流動床式生物処理装
置では沈殿槽と返送ポンプが不要となり、その分だけ装
置自体をコンパクトに構成でき、製造コストを低減でき
ると共に、微生物は担体表面に付着しているため、バル
キング現象が発生することはなく、高負荷をかけること
ができ、原水の水質変動に対する抵抗性が強力となり、
長期継続運転が容易になる。As described above, this aerobic biological treatment apparatus does not require a settling tank and a return pump in the fluidized bed type biological treatment apparatus in which the carrier is separated by the slits, and the apparatus itself can be made compact by that much, and the production is possible. The cost can be reduced, and since the microorganisms are attached to the surface of the carrier, the bulking phenomenon does not occur, a high load can be applied, and the resistance to water quality fluctuations of the raw water becomes strong,
It facilitates long-term continuous operation.

【００１６】この好気性生物処理装置は、前段に微生物
担体を用いた流動床式生物処理装置を配置し、後段に活
性汚泥を用いた活性汚泥法処理装置を配置したので、流
動床式生物処理装置において原水が処理されて負荷が低
減されるので、活性汚泥法処理装置では負荷が低減され
て低負荷運転となり、バルキング現象が発生し難くな
り、原水処理運転がスムースになり、また、担体から剥
離した微生物膜の比重が大きくなるため、該微生物膜が
混合した活性汚泥は沈降性が良好になり、バルキング防
止の作用を発揮する。In this aerobic biological treatment apparatus, a fluidized bed type biological treatment apparatus using a microbial carrier is arranged in the former stage, and an activated sludge method treating apparatus using activated sludge is arranged in the latter stage. Since the raw water is treated in the device and the load is reduced, the load is reduced in the activated sludge method treatment device, resulting in low load operation, the bulking phenomenon is less likely to occur, the raw water treatment operation is smooth, and Since the specific gravity of the peeled microbial membrane becomes large, the activated sludge mixed with the microbial membrane has a good sedimentation property, and exhibits an action of preventing bulking.

【００１７】また、流動床式生物処理装置のみで原水を
処理する場合には、微生物は担体表面に固定されている
ため、活性汚泥法に比較して廃水と微生物の接触表面積
が小さくなり、処理水質が完全には良好な浄化水になら
ない。しかしながら、この好気性生物処理装置は、流動
床式生物処理装置の後段に活性汚泥法処理装置を設けて
いるから、処理水質が格段に良好になり、規制された基
準値を十分にクリアすることができる。Further, when raw water is treated only by the fluidized bed type biological treatment apparatus, since the microorganisms are fixed on the surface of the carrier, the contact surface area between the wastewater and the microorganism becomes smaller than that in the activated sludge method, and the treatment is performed. The water quality is not completely good. However, since this aerobic biological treatment equipment has an activated sludge method treatment equipment in the latter stage of the fluidized bed type biological treatment equipment, the quality of treated water is significantly improved, and the regulated standard value must be sufficiently cleared. You can

【００１８】流動床式生物処理装置において、高負荷を
かけると、単位容積、単位時間あたりのＢＯＤ除去量は
大きくなるが、これは微生物当たりの餌が多いためであ
る。また、低負荷の場合には単位容積、単位時間あたり
のＢＯＤ除去量が小さくなるため、微生物当たりの餌が
少なくなる。この好気性生物処理装置における流動床式
生物処理装置ではスリットによる分離を行うので、高負
荷処理に適している。これに対して、活性汚泥法処理装
置では、活性汚泥の吸着能は、餌が少ない方が高まり、
低負荷の方が処理水質は良好になる。When a high load is applied to the fluidized bed type biological treatment apparatus, the amount of BOD removed per unit volume and unit time increases, but this is because the bait per microorganism is large. Further, when the load is low, the amount of BOD removed per unit volume and unit time is small, so the amount of food per microorganism is reduced. The fluidized bed type biological treatment device in this aerobic biological treatment device is suitable for high-load treatment because it is separated by slits. On the other hand, in the activated sludge method treatment device, the adsorption capacity of the activated sludge is higher when there is less food,
The treated water quality is better when the load is low.

【００１９】この好気性生物処理装置は、前段で流動床
式生物処理装置で高負荷処理を行い、後段で活性汚泥法
処理装置で低負荷処理を行うので、両処理方式の長所を
十分に発揮させることができ、高処理能力と高度処理水
質を確保することができる。更に、流動床式生物処理装
置を構成する前記第１曝気槽と活性汚泥法処理装置を構
成する前記第２曝気槽との容積比は、１：１０〜２：１
程度に設定されていることが好ましいものである。This aerobic biological treatment device performs high load treatment in the fluidized bed type biological treatment device in the first stage and low load treatment in the activated sludge method treatment device in the second stage, so that the advantages of both treatment methods are fully exhibited. It is possible to secure high treatment capacity and high treated water quality. Further, the volume ratio of the first aeration tank constituting the fluidized bed type biological treatment apparatus to the second aeration tank constituting the activated sludge method treatment apparatus is 1:10 to 2: 1.
It is preferable that the degree is set.

【００２０】また、この好気性生物処理装置では、既設
の活性汚泥法処理装置の処理能力が足りなくなった場合
に曝気槽を分割して前段を流動床式生物処理装置に構成
することによって処理能力を上げることができる。活性
汚泥法処理装置の曝気槽を分割する場合には、仕切り板
を曝気槽内に設置し、一方の曝気槽内にスリットによる
担体分離方式の曝気槽を配置して構成することができ
る。Further, in this aerobic biological treatment apparatus, when the existing activated sludge treatment apparatus has insufficient processing capacity, the aeration tank is divided and the former stage is constituted by a fluidized bed type biological treatment apparatus. Can be raised. In the case of dividing the aeration tank of the activated sludge method treatment device, a partition plate may be installed in the aeration tank and one of the aeration tanks may be a carrier separation type aeration tank with a slit.

【００２１】また、流動床式生物処理装置において、前
記スリットを構成する前記格子を最適のエッジ形状に形
成すると共に、前記スリットの液面に対する傾斜角度を
最適の角度設定されているので、前記微生物担体が前記
スリットに目詰まりして前記スリットの通路を塞ぐ現象
が最小限になり、前記スリットの洗浄のための逆洗回数
も大幅に低減できる。更に、前記散気管を前記スリット
との位置関係で、前記散気管を前記曝気槽内で前記スリ
ットの下方に設置したので、廃水の前記曝気槽内での流
動が良好になると共に、前記微生物担体が前記スリット
によって前記スリット近傍に滞留することを防止するこ
とができ、前記スリットの洗浄のための逆洗回数も大幅
に低減できる。Further, in the fluidized bed type biological treatment apparatus, since the lattice forming the slit is formed to have an optimum edge shape and the inclination angle of the slit with respect to the liquid surface is set to an optimum angle, the microorganisms The phenomenon that the carrier is clogged in the slit to block the passage of the slit is minimized, and the number of backwashing for cleaning the slit can be significantly reduced. Furthermore, since the air diffuser is located below the slit in the aeration tank in a positional relationship with the slit, the flow of waste water in the aeration tank is improved, and the microbial carrier is used. Can be prevented from staying near the slit by the slit, and the number of backwashing for cleaning the slit can be significantly reduced.

【００２２】[0022]

【発明の実施の形態】以下、図面を参照して、この発明
による好気性生物処理装置の実施例について詳述する。
図１はこの発明による好気性生物処理装置の一実施例を
示す概略説明図である。BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the aerobic biological treatment apparatus according to the present invention will be described below in detail with reference to the drawings.
FIG. 1 is a schematic explanatory view showing an embodiment of the aerobic biological treatment apparatus according to the present invention.

【００２３】この好気性生物処理装置は、主として、原
水を受け入れる流入口４を有し且つ微生物担体６と共に
原水を流動させて原水を浄化して中間処理水とする流動
床式生物処理装置を構成する曝気槽１、処理水を活性汚
泥１６と共に流動させて中間処理水を浄化して処理水に
する活性汚泥法処理装置を構成する曝気槽２、及び曝気
槽２の越流隔壁２３を越流した中間処理水を受け入れて
中間処理水中に含まれる活性汚泥１６を沈降させて中間
処理水を浄化水にする活性汚泥沈殿槽３から構成されて
いる。曝気槽１の流出口５には、微生物担体６を曝気室
１１内に滞留させて中間処理水を排出するため、微生物
担体６と中間処理水とを分離する流出口５に設けたスリ
ットを構成する格子２０が設けられている。従って、曝
気槽１の中間処理水は、曝気槽１の格子２０のスリット
を通過して曝気槽２へ送り込まれる。曝気槽２の曝気室
１２で浄化された処理水は、越流隔壁２３を越流して活
性汚泥沈殿槽３の活性汚泥沈殿室１３に送り込まれる。This aerobic biological treatment apparatus mainly comprises a fluidized bed type biological treatment apparatus having an inlet 4 for receiving raw water and flowing the raw water together with a microbial carrier 6 to purify the raw water into intermediate treated water. The aeration tank 1 for controlling, the aeration tank 2 that constitutes the activated sludge method treatment device that makes the treated water flow with the activated sludge 16 to purify the intermediate treated water into the treated water, and the overflow partition 23 of the aeration tank 2 It comprises an activated sludge settling tank 3 which receives the intermediate treated water and sinks the activated sludge 16 contained in the intermediate treated water to convert the intermediate treated water into purified water. The outlet 5 of the aeration tank 1 has a slit provided in the outlet 5 for separating the microbial carrier 6 and the intermediate treated water in order to retain the microbial carrier 6 in the aeration chamber 11 and discharge the intermediate treated water. A grid 20 is provided. Therefore, the intermediate treated water in the aeration tank 1 passes through the slits of the lattice 20 of the aeration tank 1 and is sent to the aeration tank 2. The treated water purified in the aeration chamber 12 of the aeration tank 2 overflows the overflow partition 23 and is sent to the activated sludge precipitation chamber 13 of the activated sludge precipitation tank 3.

【００２４】活性汚泥沈殿室１３では、処理水中の含ま
れる活性汚泥１６を沈降させて処理水を浄化水にする機
能を有している。また、活性汚泥沈殿槽３には、活性汚
泥沈殿室１３に沈降した活性汚泥１６の一部を曝気槽２
にフィードバックさせるため、活性汚泥沈殿槽３から曝
気槽２へ延びる活性汚泥フィードバック管即ち活性汚泥
返送パイプ１８、及び活性汚泥沈殿室１３に沈降した活
性汚泥１６を活性汚泥返送パイプ１８を通じて曝気槽２
へ送り込む返送ポンプ１７を備えている。活性汚泥沈殿
槽３には、その流出口２５に設けた越流隔壁２２を越流
した浄化水を排出する流出トラフ１９を備えている。The activated sludge settling chamber 13 has a function to settle the activated sludge 16 contained in the treated water to convert the treated water into purified water. In the activated sludge settling tank 3, a part of the activated sludge 16 settled in the activated sludge settling chamber 13 is aerated.
The activated sludge feedback pipe extending from the activated sludge settling tank 3 to the aeration tank 2, that is, the activated sludge return pipe 18, and the activated sludge 16 settled in the activated sludge settling chamber 13 through the activated sludge return pipe 18.
A return pump 17 is provided for feeding The activated sludge settling tank 3 is provided with an outflow trough 19 that discharges the purified water that has overflowed the overflow partition 22 provided at the outflow port 25.

【００２５】曝気槽１，２及び活性汚泥沈殿槽３は、Ｆ
ＲＰ、鉄鋼、ステンレス鋼、コンクリート等の材料から
作られている。曝気槽１は、曝気室１１を構成し、廃水
の原水を曝気室１１内に供給する原水流入口４と、曝気
室１１から処理水を排出させる流出口５を有し、曝気室
１１内で微生物担体６と共に廃水を流動させて原水を浄
化して中間処理水にするものである。曝気室１１内に
は、廃水及び微生物担体６を曝気室１１内で流動させる
ため、ガス供給装置のガス供給ブロワ７からガス管８及
びガスチューブ９を通じてガスが送り込まれるディフュ
ーザーとしての散気管１０が設置されている。散気管１
０は、ガスチューブ９の先端に取り付けられ、ガスチュ
ーブ９を曝気室１１内に垂下させることによって最適位
置に設置できる。The aeration tanks 1 and 2 and the activated sludge precipitation tank 3 are F
Made from materials such as RP, steel, stainless steel, concrete. The aeration tank 1 constitutes an aeration chamber 11, has a raw water inlet 4 for supplying raw water of waste water into the aeration chamber 11, and an outlet 5 for discharging treated water from the aeration chamber 11. The waste water is made to flow together with the microorganism carrier 6 to purify the raw water into intermediate treated water. In the aeration chamber 11, in order to make the wastewater and the microbial carrier 6 flow in the aeration chamber 11, there is provided a diffuser pipe 10 as a diffuser into which gas is sent from the gas supply blower 7 of the gas supply device through the gas pipe 8 and the gas tube 9. is set up. Air diffuser 1
0 is attached to the tip of the gas tube 9 and can be installed at the optimum position by suspending the gas tube 9 in the aeration chamber 11.

【００２６】また、曝気槽１の曝気室１１に隣接して曝
気室１２を構成する曝気槽２が設置されている。曝気槽
２は、曝気槽１と同様に、曝気室１２を構成している。
曝気室１２内には、曝気槽１で処理された処理水が格子
２０のスリットを通じて供給される。曝気室１２では、
中間処理水を流動させて浄化して処理水にするものであ
り、曝気室１２内には、中間処理水を流動させるため、
曝気室１２と同様に、ガス供給ブロワ７からガス管８及
びガスチューブ２８を通じてガスが送り込まれるディフ
ューザーとしての散気管３０が設置されている。An aeration tank 2 constituting an aeration chamber 12 is installed adjacent to the aeration chamber 11 of the aeration tank 1. The aeration tank 2 constitutes an aeration chamber 12 like the aeration tank 1.
The treated water treated in the aeration tank 1 is supplied into the aeration chamber 12 through the slits of the lattice 20. In the aeration chamber 12,
The intermediate treated water is made to flow and purified to be treated water. Since the intermediate treated water flows in the aeration chamber 12,
Similar to the aeration chamber 12, a diffuser pipe 30 is installed as a diffuser into which gas is sent from the gas supply blower 7 through the gas pipe 8 and the gas tube 28.

【００２７】この好気性生物処理装置は、流動床式生物
処理装置を構成する曝気槽１と活性汚泥法処理装置を構
成する曝気槽２とは、処理能力を考慮して、曝気槽１と
曝気槽２との容積比は１：１０〜２：１程度に設定され
ている。In this aerobic biological treatment apparatus, the aeration tank 1 which constitutes the fluidized bed type biological treatment apparatus and the aeration tank 2 which constitutes the activated sludge method treatment apparatus are aeration tank 1 and aeration considering the treatment capacity. The volume ratio with the tank 2 is set to about 1:10 to 2: 1.

【００２８】活性汚泥沈殿槽３は、活性汚泥沈殿室１３
を形成し、流出トラフ１９が設けられている。流出トラ
フ１９には、越流隔壁２２が設けられていると共に、排
水管３１が設けられている。流出トラフ１９は、越流隔
壁２２を通過した浄化水を受け入れて浄化水を排水管３
１を通じて排出する。The activated sludge settling tank 3 comprises an activated sludge settling chamber 13
And an outflow trough 19 is provided. The outflow trough 19 is provided with an overflow partition 22 and a drain pipe 31. The outflow trough 19 receives the purified water that has passed through the overflow partition 22, and discharges the purified water to the drain pipe 3
Discharge through 1.

【００２９】この好気性生物処理装置において、曝気槽
１の流出口５に微生物担体６と処理水とを分離するスリ
ットを構成する格子２０が取付け取外し可能に固定され
ている。格子２０で形成されるスリットは、曝気室１１
内の液面に対して垂直方向に順次並列に延びる構造に形
成されている。スリットは、微生物担体６と処理水とを
分離し、微生物担体６を曝気室１１に滞留させ、処理水
を流出口５から曝気槽２へ送り込む機能を有する。In this aerobic biological treatment apparatus, a grid 20 constituting a slit for separating the microbial carrier 6 and treated water is attached and detachably fixed to the outflow port 5 of the aeration tank 1. The slit formed by the lattice 20 is used for the aeration chamber 11
It is formed in a structure that extends in parallel in the vertical direction with respect to the inner liquid surface. The slit has a function of separating the microbial carrier 6 from the treated water, allowing the microbial carrier 6 to stay in the aeration chamber 11, and feeding the treated water from the outflow port 5 to the aeration tank 2.

【００３０】曝気室１１内には、散気管１０がほぼ流出
口５の下方で底面の近傍に設置され、散気管１０へはガ
ス供給装置のブロワ７からのガスがガス管８を通じて供
給されるように構成されている。従って、散気管１０か
ら噴射される水泡の流動作用によって、流出口５に設け
た格子２０のスリットの領域では、原水と微生物担体６
との流動は上昇流となって格子２０に衝突する状態で曝
気室１１内を流動する。散気管１０から曝気室１１内へ
散気されるガスは、空気、Ｎ2 ガス、メタンガス等であ
り、好気性処理、脱窒処理、嫌気性消化処理等の廃水の
処理形態によって選定されるものである。Inside the aeration chamber 11, an air diffuser 10 is installed substantially below the outlet 5 and near the bottom surface, and gas from the blower 7 of the gas supply device is supplied to the air diffuser 10 through the gas pipe 8. Is configured. Therefore, due to the flow action of the water bubbles ejected from the air diffuser 10, in the area of the slit of the lattice 20 provided in the outflow port 5, the raw water and the microorganism carrier 6
And flows as an upward flow in the aeration chamber 11 while colliding with the lattice 20. The gas diffused from the diffuser pipe 10 into the aeration chamber 11 is air, N 2 gas, methane gas or the like, which is selected according to the treatment form of wastewater such as aerobic treatment, denitrification treatment, and anaerobic digestion treatment. Is.

【００３１】この好気性生物処理装置では、格子２０
は、流出口５の縁部にねじ、ボルト等の固着手段２９で
取付け取外し可能に固定されている。格子２０で形成さ
れるスリットは、微生物担体６と中間処理水との分離効
果を高めるため、曝気室１１内の液面に対して垂直方向
に順次並列に配置されている。また、格子２０で形成さ
れるスリットは、例えば、曝気槽１内側即ち曝気室１１
側が鋭角θE のエッジに形成され、曝気室１１側から外
側の流出側へ通路断面積が大きくなるような断面台形の
格子に形成されている。スリットは、上記の形状の他、
図示していないが、曝気室１１側の面に鋭角のエッジを
有していることが好ましく、断面三角形、エッジワイヤ
等の材料を使用できるものである。In this aerobic biological treatment apparatus, the grid 20
Is fixed to the edge of the outflow port 5 by a fixing means 29 such as a screw or a bolt so as to be removable. The slits formed by the grid 20 are sequentially arranged in parallel in the vertical direction with respect to the liquid surface in the aeration chamber 11 in order to enhance the effect of separating the microbial carrier 6 and the intermediate treated water. The slits formed by the lattice 20 are, for example, inside the aeration tank 1, that is, the aeration chamber 11
The side is formed as an edge with an acute angle θ E , and the lattice is formed in a trapezoidal cross-section so that the passage cross-sectional area increases from the aeration chamber 11 side to the outside outflow side. In addition to the above shape, the slit is
Although not shown, it is preferable that the surface on the aeration chamber 11 side has an acute-angled edge, and a material having a triangular cross section, an edge wire, or the like can be used.

【００３２】また、微生物担体６の比重は、０．８〜
１．２であり、好ましくは、０．９〜１．０２である。
更に、微生物担体６は、自重の５倍以上の水を吸水した
含水ゲルであり、水中ではその粒径が１〜５ｍｍにな
る。また、微生物担体６は、カチオン性の高吸水樹脂を
用いて作られている。微生物担体６を構成する担体は、
微生物が担体表面に吸着してすみかにでき、微生物層を
形成できるものであればよく、その他スポンジ、プラス
チック材の比重が１に近いものを使用できる。The specific gravity of the microbial carrier 6 is 0.8 to
It is 1.2, and preferably 0.9 to 1.02.
Further, the microbial carrier 6 is a hydrous gel that absorbs 5 times or more of its own weight of water, and has a particle size of 1 to 5 mm in water. The microbial carrier 6 is made of a cationic highly water-absorbing resin. The carrier constituting the microbial carrier 6 is
Any microorganism can be used as long as it can be readily adsorbed on the surface of the carrier and can form a microorganism layer, and other sponges and plastic materials having a specific gravity close to 1 can be used.

【００３３】また、スリットを構成する格子２０は、曝
気槽１内の液面に対して予め決められた傾斜角度θ、即
ち、θ＝６０°〜９０°の角度に傾斜して流出口５に設
置されている。格子２０のスリットの傾斜角度は、微生
物担体６のスリットへの詰まりに関係し、傾斜角度が小
さ過ぎると、スリットを洗浄するための逆洗回数が多く
なり、また、格子２０で構成されるスリットの傾斜角度
が大き過ぎると、スリットを洗浄するための逆洗回数が
多くなる。更に、曝気室１１内には、散気管１０がほぼ
流出口５の下方で底面近傍に設置されているが、散気管
１０の曝気室１１内の設置位置は、微生物担体６等のス
リットへの詰まりに関係し、散気管１０の設置位置がス
リットの下方から離れ過ぎると、スリットを洗浄するた
めの逆洗回数が多くなる。Further, the lattice 20 forming the slits is inclined at a predetermined inclination angle θ with respect to the liquid surface in the aeration tank 1, that is, at an angle of θ = 60 ° to 90 ° to the outlet 5. is set up. The inclination angle of the slit of the lattice 20 is related to the clogging of the slit of the microbial carrier 6, and if the inclination angle is too small, the number of backwashing for washing the slit increases, and the slit formed by the lattice 20 also increases. If the inclination angle of is too large, the number of backwashing for cleaning the slits increases. Further, in the aeration chamber 11, the air diffuser 10 is installed near the bottom surface substantially below the outflow port 5, but the installation position of the air diffuser 10 in the aeration chamber 11 is set to the slit of the microorganism carrier 6 or the like. Due to the clogging, if the installation position of the air diffuser 10 is too far from the lower side of the slit, the number of backwashing for cleaning the slit increases.

【００３４】この好気性生物処理装置において、曝気槽
２は、活性汚泥法処理装置の機能を果たす曝気室１２を
構成し、曝気槽１で荒処理されたＢＯＤの低負荷の中間
処理水を浄化するものである。曝気槽２の中間処理水の
流入口２４は、図では曝気槽１の格子２０と共用した構
造に構成されているが、曝気槽１の流出口５に流出トラ
フを設け、該流出トラフに形成することもできる。曝気
槽２の流出口２１は、越流隔壁２３で構成され、曝気室
１２で浄化された処理水が越流隔壁２３を越流して活性
汚泥沈殿槽３に送り込まれる。曝気槽２には、活性汚泥
返送パイプ１８の放出口が開口し、曝気槽２から流出し
た活性汚泥を補充するように構成されている。In this aerobic biological treatment apparatus, the aeration tank 2 constitutes an aeration chamber 12 that functions as an activated sludge method treatment apparatus, and purifies the low-load intermediate treated water of BOD rough-treated in the aeration tank 1. To do. The inflow port 24 of the intermediate treated water of the aeration tank 2 is configured to be shared with the lattice 20 of the aeration tank 1 in the figure, but an outflow trough is provided at the outflow port 5 of the aeration tank 1 and is formed in the outflow trough. You can also do it. The outlet 21 of the aeration tank 2 is composed of an overflow partition 23, and the treated water purified in the aeration chamber 12 overflows the overflow partition 23 and is sent to the activated sludge settling tank 3. The aeration tank 2 is configured so that the activated sludge return pipe 18 has a discharge port for replenishing the activated sludge flowing out from the aeration tank 2.

【００３５】また、この好気性生物処理装置において、
活性汚泥沈殿槽３は、曝気槽２から送り込まれた処理水
に含まれる活性汚泥１６を底部に沈降させ、活性汚泥１
６と浄化水に分離する機能を有するものである。活性汚
泥１６は開閉バルブ１４の開放によって活性汚泥槽１５
に放出され、また、浄化水は流出口２５から越流隔壁２
２を越流して流出トラフ１９へ排出され、流出トラフ１
９から排水管３１を通じて排水される。また、曝気槽２
から送り込まれる処理水には活性汚泥１６が含まれてい
るので、曝気槽２内の活性汚泥１６は減少する傾向にあ
るので、曝気槽２で不足する活性汚泥１６を補充するた
め、活性汚泥沈殿槽３から排出される活性汚泥１６の一
部を曝気槽２にフィードバックする。活性汚泥沈殿槽３
の底部に連結された活性汚泥返送パイプ２７は、活性汚
泥槽１５に設置した活性汚泥返送パイプ２６と集合して
活性汚泥返送パイプ１８に連通し、活性汚泥返送パイプ
１８には返送ポンプ１７が設けられている。勿論、活性
汚泥返送パイプ２６と活性汚泥返送パイプ２７とは、い
ずれか一方のみを設けるのみでもよい。Further, in this aerobic biological treatment apparatus,
The activated sludge settling tank 3 causes the activated sludge 16 contained in the treated water sent from the aeration tank 2 to settle to the bottom, and the activated sludge 1
6 and purified water. Activated sludge 16 is activated sludge tank 15 by opening and closing valve 14.
The purified water is discharged to the overflow partition 2 from the outlet 25.
Overflow 2 and discharge to outflow trough 19 and outflow trough 1
It is drained from 9 through a drain pipe 31. Also, aeration tank 2
Since the treated water sent from the tank contains the activated sludge 16, the activated sludge 16 in the aeration tank 2 tends to decrease. A part of the activated sludge 16 discharged from the tank 3 is fed back to the aeration tank 2. Activated sludge settling tank 3
The activated sludge return pipe 27 connected to the bottom part of the activated sludge gathers with the activated sludge return pipe 26 installed in the activated sludge tank 15 and communicates with the activated sludge return pipe 18, and the activated sludge return pipe 18 is provided with a return pump 17. Has been. Of course, only one of the activated sludge return pipe 26 and the activated sludge return pipe 27 may be provided.

【００３６】[0036]

【発明の効果】この発明による好気性生物処理装置は、
上記のように構成されているので、流動床式生物処理装
置を構成する前段の曝気槽において微生物担体を用いて
原水を荒処理して高ＢＯＤ負荷の原水を低ＢＯＤ負荷の
中間処理水にまで処理し、次いで、活性汚泥法処理装置
を構成する後段の曝気槽で低ＢＯＤ負荷の中間処理水を
活性汚泥を用いて処理し、最後にその処理水を活性汚泥
沈殿槽で活性汚泥と浄化水に分離するので、活性汚泥沈
殿槽から放出される浄化水は放水可能な基準値の処理水
にまで十分に浄化することができる。従って、この好気
性生物処理装置は、例えば、一般産業廃水処理等の原水
即ち廃水に対して高濃度及び高負荷処理を行うことがで
き、浄化率を高めることができると共に、廃水中の有機
物濃度すなわちＢＯＤ、ＣＯＤ等を効率的に引き下げる
ことができる。この好気性生物処理装置は、前段の曝気
槽に対しては別途に沈降分離室等を設ける必要がなく、
装置そのものをコンパクトに構成できる。The aerobic biological treatment apparatus according to the present invention comprises:
Since it is configured as described above, raw water is roughly treated by using a microbial carrier in the aeration tank in the former stage constituting the fluidized bed type biological treatment apparatus, and raw water with a high BOD load is converted to intermediate treated water with a low BOD load. Treated, then treated with activated sludge, the intermediate treated water of low BOD load in the aeration tank of the latter stage constituting the activated sludge method treatment device, and finally the treated water is treated with activated sludge and purified water in the activated sludge sedimentation tank. As a result, the purified water discharged from the activated sludge settling tank can be sufficiently purified to the treated water of the standard value at which water can be discharged. Therefore, this aerobic biological treatment apparatus can perform high-concentration and high-load treatment on raw water such as general industrial wastewater treatment, that is, wastewater, can increase the purification rate, and can reduce the concentration of organic matter in the wastewater. That is, BOD, COD, etc. can be efficiently lowered. This aerobic biological treatment device does not require a separate settling separation chamber or the like for the aeration tank in the previous stage,
The device itself can be made compact.

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

【図１】この発明による好気性生物処理装置の一実施例
を示す概略説明図である。FIG. 1 is a schematic explanatory view showing an embodiment of an aerobic biological treatment apparatus according to the present invention.

【符号の説明】[Explanation of symbols]

１，２ 曝気槽 ３ 活性汚泥沈殿槽 ４，２４ 流入口 ５，２１，２５ 流出口 ６ 微生物担体 ７ ガス供給ブロワ ８ ガス管 ９，２８ ガスチューブ １０，３０ 散気管 １６ 活性汚泥 １７ ポンプ １８，２６，２７ 活性汚泥返送パイプ １９ 流出トラフ ２０ 格子 ２２，２３ 越流隔壁 1, 2 Aeration tank 3 Activated sludge precipitation tank 4, 24 Inlet port 5, 21, 25 Outlet port 6 Microorganism carrier 7 Gas supply blower 8 Gas pipe 9, 28 Gas tube 10, 30 Diffuser pipe 16 Activated sludge 17 Pump 18, 26 , 27 Activated sludge return pipe 19 Outflow trough 20 Lattice 22,23 Overflow bulkhead

Claims (6)

【特許請求の範囲】[Claims] 【請求項１】 原水を受け入れる流入口を有し且つ微生
物担体と共に原水を流動させて原水を浄化した第１処理
水とする流動床式生物処理装置を構成する第１曝気槽、
前記微生物担体を前記第１曝気槽内に滞留させて前記第
１処理水を排出するため前記微生物担体と前記第１処理
水とを分離する前記第１曝気槽の流出口に設けた格子、
前記格子を通過した前記第１処理水を受け入れる流入口
を有し且つ前記第１処理水を活性汚泥と共に流動させて
第１処理水を浄化して第２処理水にする活性汚泥法処理
装置を構成する第２曝気槽、前記第２曝気槽で浄化され
た前記第２処理水を越流させて排出する前記第２曝気槽
の流出口に設けた越流隔壁、前記越流隔壁を越流した前
記第２処理水を受け入れて前記第２処理水中の含まれる
活性汚泥を沈降させて前記第２処理水を浄化水にする活
性汚泥沈殿槽、前記活性汚泥沈殿槽に沈降した活性汚泥
の一部を前記第２曝気槽にフィードバックさせる活性汚
泥返送装置、及び前記活性汚泥沈殿槽の流出口に設けた
越流隔壁を越流した浄化水を排出する流出トラフ、から
成る好気性生物処理装置。1. A first aeration tank having a fluidized bed type biological treatment apparatus which has an inlet for receiving raw water and which is made into a first treated water by purifying the raw water together with a microorganism carrier.
A grid provided at the outlet of the first aeration tank for separating the microbial carrier and the first treated water in order to allow the microbial carrier to stay in the first aeration tank and discharge the first treated water;
An activated sludge method treatment device having an inflow port for receiving the first treated water that has passed through the grid and purifying the first treated water with the activated sludge to purify the first treated water into second treated water. The second aeration tank constituting the overflow tank, the overflow partition wall provided at the outlet of the second aeration tank for overflowing and discharging the second treated water purified in the second aeration tank, and the overflow partition wall One of the activated sludge settling tank that receives the second treated water and sinks the activated sludge contained in the second treated water to make the second treated water purified water, and the activated sludge settled in the activated sludge settling tank An aerobic biological treatment device comprising an activated sludge returning device for feeding back a portion to the second aeration tank, and an outflow trough for discharging purified water that overflows an overflow partition provided at an outlet of the activated sludge precipitation tank. 【請求項２】 前記第１曝気室及び前記第２曝気室内に
は、散気管及び前記散気管へガスを供給するガス供給装
置を設けた請求項１に記載の好気性生物処理装置。2. The aerobic biological treatment apparatus according to claim 1, wherein an air diffuser and a gas supply device for supplying gas to the air diffuser are provided in the first aeration chamber and the second aeration chamber. 【請求項３】 前記流出口に取付け取外し可能に固定さ
れた前記格子で形成されたスリットは、前記曝気室内の
液面に対して垂直方向に順次並列に延びている請求項１
又は２に記載の好気性生物処理装置。3. The slits formed by the grid fixed to the outflow port so as to be detachably fixed extend sequentially in parallel in a direction perpendicular to the liquid surface in the aeration chamber.
Or the aerobic biological treatment apparatus according to 2. 【請求項４】 前記微生物担体の比重が０．８〜１．２
である請求項１〜３のいずれか１項に記載の好気性生物
処理装置。4. The specific gravity of the microorganism carrier is 0.8 to 1.2.
The aerobic biological treatment apparatus according to any one of claims 1 to 3. 【請求項５】 前記微生物担体はカチオン性の高吸水樹
脂である請求項１〜４のいずれか１項に記載の好気性生
物処理装置。5. The aerobic biological treatment apparatus according to any one of claims 1 to 4, wherein the microorganism carrier is a cationic highly water-absorbent resin. 【請求項６】 前記第１曝気槽と前記第２曝気槽との容
積比は、１：１０〜２：１程度に設定されている請求項
１〜５のいずれか１項に記載の好気性生物処理装置。6. The aerobic gas according to claim 1, wherein the volume ratio of the first aeration tank to the second aeration tank is set to about 1:10 to 2: 1. Biological treatment equipment.
JP16249496A 1996-06-04 1996-06-04 Aerobic treating device Pending JPH09323091A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP16249496A JPH09323091A (en) 1996-06-04 1996-06-04 Aerobic treating device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP16249496A JPH09323091A (en) 1996-06-04 1996-06-04 Aerobic treating device

Publications (1)

Publication Number Publication Date
JPH09323091A true JPH09323091A (en) 1997-12-16

Family

ID=15755696

Family Applications (1)

Application Number Title Priority Date Filing Date
JP16249496A Pending JPH09323091A (en) 1996-06-04 1996-06-04 Aerobic treating device

Country Status (1)

Country Link
JP (1) JPH09323091A (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2001347284A (en) * 2000-06-08 2001-12-18 Kuraray Co Ltd Wastewater treatment method
KR20020010854A (en) * 2000-07-31 2002-02-06 박헌철 The structure of water purifier tank
KR20020018571A (en) * 2000-09-02 2002-03-08 남기관 Reuse system and Biological nutrients removal by bio-wrinkle media
JP2008142632A (en) * 2006-12-11 2008-06-26 Unitika Ltd Method for treating waste water biologically
CN102295384A (en) * 2011-06-16 2011-12-28 博瑞德（南京）净化技术有限公司 1,4-butanediol chemical waste water treatment technology
CN109851049A (en) * 2019-04-11 2019-06-07 信开水环境投资有限公司 Sewage treatment unit and its application method and purposes

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2001347284A (en) * 2000-06-08 2001-12-18 Kuraray Co Ltd Wastewater treatment method
KR20020010854A (en) * 2000-07-31 2002-02-06 박헌철 The structure of water purifier tank
KR20020018571A (en) * 2000-09-02 2002-03-08 남기관 Reuse system and Biological nutrients removal by bio-wrinkle media
JP2008142632A (en) * 2006-12-11 2008-06-26 Unitika Ltd Method for treating waste water biologically
CN102295384A (en) * 2011-06-16 2011-12-28 博瑞德（南京）净化技术有限公司 1,4-butanediol chemical waste water treatment technology
CN109851049A (en) * 2019-04-11 2019-06-07 信开水环境投资有限公司 Sewage treatment unit and its application method and purposes

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