JPH07136678A - Wastewater treatment method and tank - Google Patents
Wastewater treatment method and tankInfo
- Publication number
- JPH07136678A JPH07136678A JP30710493A JP30710493A JPH07136678A JP H07136678 A JPH07136678 A JP H07136678A JP 30710493 A JP30710493 A JP 30710493A JP 30710493 A JP30710493 A JP 30710493A JP H07136678 A JPH07136678 A JP H07136678A
- Authority
- JP
- Japan
- Prior art keywords
- carrier
- tank
- partition plate
- water
- outflow
- 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
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)
- Purification Treatments By Anaerobic Or Anaerobic And Aerobic Bacteria Or Animals (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、汚水処理槽に係り、特
に下水・し尿・産業排水などの有機性排水を、微生物固
定化担体を利用して生物学的に処理する汚水処理槽とそ
れを用いた汚水処理方法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sewage treatment tank, and particularly to a sewage treatment tank for biologically treating organic wastewater such as sewage, night soil, industrial wastewater, etc. using a microorganism immobilization carrier. The present invention relates to a wastewater treatment method using.
【０００２】[0002]
【従来の技術】近年、活性汚泥法、生物膜法、固定化微
生物法などの普及が著しいが、土地利用の効率化が叫ば
れる国内においては、より省面積で処理が可能な高性能
汚水処理装置の開発が急務である。この中で、特に微生
物固定化担体を利用する汚水処理装置は、担体素材の性
能向上と相まって注目を集めている。2. Description of the Related Art In recent years, activated sludge method, biofilm method, immobilized microbial method, etc. have been remarkably spread, but in Japan where the efficiency of land use is called for, high-performance sewage treatment that can be processed in a smaller area Development of equipment is urgent. Among them, a sewage treatment apparatus using a microorganism-immobilized carrier has been particularly attracting attention in combination with an improvement in the performance of the carrier material.
【０００３】本発明者らは、図９に示す固定化担体を利
用した汚水処理装置の開発を行ってきたが、その開発過
程で次のような技術的課題に遭遇した。すなわち、固定
化担体が被処理水とともに生物反応槽を流下する結果、
反応槽先端部の担体濃度が低下し、末端部の担体濃度が
高くなり、それに伴って処理性能が著しい低下をきたし
た。また、担体濃度の片寄りを補正する為に、生物反応
槽末端から先端へ固定化担体をポンプで返送するライン
を増設したが、ポンプにより固定化担体が破壊される傾
向が認められた。The inventors of the present invention have developed a sewage treatment apparatus using the immobilization carrier shown in FIG. 9, but encountered the following technical problems in the development process. That is, as a result of the immobilized carrier flowing down the biological reaction tank together with the water to be treated,
The carrier concentration at the front end of the reaction tank decreased, and the carrier concentration at the end increased, resulting in a marked decrease in treatment performance. Moreover, in order to correct the deviation of the carrier concentration, a line was added to return the immobilized carrier from the end of the biological reaction tank to the tip by a pump, but it was observed that the immobilized carrier was destroyed by the pump.
【０００４】[0004]
【発明が解決しようとする課題】本発明は、従来法によ
る問題点を解決し、担体濃度分布の形成に伴う処理性能
の低下を防止し、担体をすみやかに移送し、均等にでき
る汚水処理方法と汚水処理槽を提供することを課題とす
る。DISCLOSURE OF THE INVENTION The present invention solves the problems of the conventional method, prevents the deterioration of the treatment performance due to the formation of the carrier concentration distribution, and allows the carrier to be quickly transferred and evenly treated. And to provide a sewage treatment tank.
【０００５】[0005]
【課題を解決するための手段】上記課題を解決するため
に、本発明では、微生物を固定化した担体を浮遊状態で
保持して汚水を処理する方法において、該担体を浮遊保
持する槽内に強制的に水流を形成し、循環流を生じさせ
て担体の分布を均一化することとしたものである。ま
た、本発明では、微生物を固定化した担体を浮遊状態で
保持する汚水処理槽において、槽内に槽内水を垂直方向
に仕切る仕切板を配備し、該仕切板の一端を前記担体及
び水が流通可能に開放し、前記仕切板の他端側に該仕切
板をはさんで原水流入部と処理水流出部を設け、該流出
部には前記担体の流出を防止するための手段を設けると
共に、前記仕切板をはさんで流出部から流入部に担体を
移送する移送手段を設けたものである。In order to solve the above-mentioned problems, in the present invention, in a method of treating wastewater by holding a carrier on which microorganisms are immobilized in a floating state, the carrier is suspended in a tank. This is to forcibly form a water flow and generate a circulating flow to make the carrier distribution uniform. Further, in the present invention, in a sewage treatment tank for holding a carrier in which microorganisms are immobilized in a floating state, a partition plate for vertically partitioning the water in the tank is provided in the tank, and one end of the partition plate is the carrier and water. Is opened so that it can be circulated, and a raw water inflow part and a treated water outflow part are provided on the other end side of the partition plate by sandwiching the partition plate, and a means for preventing the outflow of the carrier is provided in the outflow part. Along with the partition plate, a transfer means for transferring the carrier from the outflow portion to the inflow portion is provided.
【０００６】前記汚水処理槽において、担体の移送手段
としては、前記仕切板の他端部に開口を設け、該開口を
通して前記担体を移送するための強制水流を形成するの
がよく、また、強制水流を形成するには、プロペラ式攪
拌機、ポンプ、エアリフト等を用いるのがよい。また、
前記処理槽の底部には散気管等の含酸素気体供給手段を
設け、好気性処理槽とするのがよい。本発明は、汚水を
連続的に処理するに際し、好気性処理槽として、前記し
た汚水処理槽を用いるものである。In the sewage treatment tank, as a carrier transfer means, it is preferable that an opening is provided at the other end of the partition plate to form a forced water flow for transferring the carrier through the opening. A propeller-type stirrer, a pump, an air lift, or the like is preferably used to form the water flow. Also,
It is preferable to provide an oxygen-containing gas supply means such as an air diffuser at the bottom of the treatment tank so that the treatment tank is an aerobic treatment tank. The present invention uses the above-described wastewater treatment tank as an aerobic treatment tank when continuously treating wastewater.
【０００７】また、本発明は、無酸素工程、好気工程、
沈殿工程を順次連結し、好気工程流出水を無酸素工程へ
循環し、沈殿工程の沈殿汚泥を無酸素工程へ返送する循
環式硝化脱窒素法、又は、更に無酸素工程の前に嫌気工
程を設け沈殿工程の沈殿汚泥を嫌気工程へ返送する、脱
窒素・脱りん活性汚泥法において、前記好気工程の処理
槽に前記した好気性処理槽を用いるものである。The present invention also provides an anoxic process, an aerobic process,
Circulating nitrification and denitrification method in which precipitation processes are sequentially connected, aerobic process effluent is circulated to the anoxic process, and sludge from the precipitation process is returned to the anoxic process, or an anaerobic process before the anoxic process In the denitrification / dephosphorization activated sludge method in which the settling sludge of the precipitation step is returned to the anaerobic step, the aerobic treatment tank described above is used as the treatment tank of the aerobic step.
【０００８】上記したように、本発明は、処理槽を仕切
板で２分し、該仕切板の一端を開放し、他端側に仕切板
をはさんで流入部と流出部を設け、流出部から流入部に
担体を移送することとし、循環流を自然形成させること
としている。本発明において、担体を槽内流の流出部か
ら流入部へ移送する手段としては、１つには強制水流を
起こす装置があげられる。この装置は、仕切板の他端の
全面又は一部に開口を設け、水平流を起こすようにする
のが良く、例えば該開口に固定化担体を破壊しないよう
なプロペラ式攪拌機、例えばＩＴＴフリクト社製フロー
クリエーターを一基又は多段に設けてもよいし、プロペ
ラ式攪拌機に昇降装置を設けて移動可能としてもよい。
これら担体移送機の駆動装置は、槽外においても槽内に
おいても、攪拌機等と一体化してもよい。As described above, according to the present invention, the treatment tank is divided into two parts by the partition plate, one end of the partition plate is opened, and the other end side is provided with the inflow part and the outflow part with the partition plate sandwiched between the outflow part and the outflow part. The carrier is transferred from the part to the inflow part to naturally form a circulating flow. In the present invention, as a means for transferring the carrier from the outflow portion to the inflow portion of the in-tank flow, one of the means is a device for generating a forced water flow. This device is preferably provided with an opening on the whole or part of the other end of the partition plate so as to generate a horizontal flow. For example, a propeller type agitator that does not destroy the immobilized carrier in the opening, for example, ITT Frict. The flow creators may be provided in a single unit or in multiple stages, or a propeller type stirrer may be provided with an elevating device so as to be movable.
The drive device for these carrier transfer machines may be integrated with the stirrer or the like both inside and outside the tank.
【０００９】また、仕切板の開口は他端側に、全面又は
水中に部分的に切り欠きを設けてもよいし、上部を切り
欠いて溢流させると共に、流入側に強制的な下向流を形
成させるためのプロペラ式攪拌機と下方を切り欠いた潜
流形式の阻流板を配置してもよい。この場合、流入部の
下向流形成部には散気を行なわないのがよく、これによ
り流入部と流出部の圧力差によってスムーズな下向流を
形成できる。こうすることで、原水、担体及び循環活性
汚泥を流出部から流入部にすみやかに送り込むことがで
きる。The opening of the partition plate may be provided with a notch at the other end on the entire surface or partially in the water, or the upper part may be notched to cause overflow, and a downward flow forced to the inflow side. A propeller-type stirrer for forming and a submerged-type baffle plate which is cut out below may be arranged. In this case, it is preferable that air is not diffused in the downward flow forming portion of the inflow portion, so that a smooth downward flow can be formed due to the pressure difference between the inflow portion and the outflow portion. By doing so, the raw water, the carrier, and the circulating activated sludge can be promptly sent from the outflow part to the inflow part.
【００１０】なお、仕切板他端の開口は、いずれにあっ
てもよく、また、強制水流の形成手段も上記したプロペ
ラ式攪拌機以外に、ポンプ手段、エアリフト手段等を適
用でき、これらを組合せてもよく、どのような方法であ
れ、担体あるいは微生物付着担体は破壊されやすいの
で、機械的な破壊が生じにくい移送手段を用いる必要が
あり、上記手段はこの要件を満足するものである。The opening at the other end of the partition plate may be any opening, and the means for forming the forced water flow may be a pump means, an air lift means, or the like, in addition to the propeller type agitator described above. However, since the carrier or the microorganism-attached carrier is easily broken by any method, it is necessary to use a transfer means that is less likely to cause mechanical breakage, and the above means satisfies this requirement.
【００１１】本発明に使用する固定化担体としては、
砂、活性炭、プラスチック片、スポンジ、親水性ゲルな
どの流動性担体があるが、本発明はこれらの担体の適用
に限定されるものではない。なお、担体への微生物固定
化手段としては付着固定化法が一般的であるが、包括固
定化法も適用可能である。本発明の装置は主に好気性処
理装置として用いることが好ましく、また前記の循環式
硝化脱窒素法或いは脱窒素脱りん活性汚泥法において好
気性工程に適用できる。また、本発明の流出部に設ける
担体の流出を防止するための手段としては、スクリーン
等を用いればよい。The immobilization carrier used in the present invention includes:
There are fluid carriers such as sand, activated carbon, plastic pieces, sponges, hydrophilic gels, but the invention is not limited to the application of these carriers. As a means for immobilizing microorganisms on a carrier, an attachment immobilization method is generally used, but an entrapping immobilization method is also applicable. The apparatus of the present invention is preferably used mainly as an aerobic treatment apparatus, and can be applied to the aerobic step in the above-mentioned circulating nitrification denitrification method or denitrification dephosphorization activated sludge method. A screen or the like may be used as a means for preventing the carrier from flowing out, which is provided in the outflow portion of the present invention.
【００１２】[0012]
【作用】本発明により、生物反応槽末端部で高濃度にな
った固定化担体を効率的に生物反応槽先端部へ返送する
ことができる。その結果、生物反応槽全体において高い
処理速度を得ることができるので、処理効率を高く維持
できる。According to the present invention, the immobilized carrier having a high concentration at the end of the biological reaction tank can be efficiently returned to the front end of the biological reaction tank. As a result, a high treatment rate can be obtained in the entire biological reaction tank, and the treatment efficiency can be kept high.
【００１３】[0013]
【実施例】以下、本発明を実施例により具体的に説明す
るが、本発明はこれらに限定されるものではない。 実施例１ 図１は、本発明の汚水処理槽の一例を示す好気槽の平面
図であり、図２は、図１の正面断面図、図３は図１の側
面断面図である。図１〜図３において、１は好気槽、２
は槽内に浮遊している固定化担体であり、好気槽の底部
には、ほぼ全面にディフューザ３が設置され、ディフュ
ーザ３には、ブロワ４から空気管５を通して空気が送ら
れている。EXAMPLES The present invention will now be specifically described with reference to examples, but the present invention is not limited thereto. Example 1 FIG. 1 is a plan view of an aerobic tank showing an example of a wastewater treatment tank of the present invention, FIG. 2 is a front sectional view of FIG. 1, and FIG. 3 is a side sectional view of FIG. 1 to 3, 1 is an aerobic tank, 2
Is an immobilization carrier floating in the tank, and a diffuser 3 is installed on almost the entire bottom surface of the aerobic tank, and air is sent to the diffuser 3 from a blower 4 through an air pipe 5.
【００１４】７は汚水の流入口で、８は処理水の流出口
で、流出口には担体２を分離する担体分離器６が設けら
れている。また、好気槽１には好気槽を２分する仕切板
９が設けられ、該仕切板９の両端は開放されている。そ
して、好気槽１の流入口７及び流出口８側には、仕切板
９の開口部にプロペラ式攪拌機１０がガイドパイプ１１
に支持されて設けられている。Reference numeral 7 is an inflow port for waste water, 8 is an outflow port for treated water, and a carrier separator 6 for separating the carrier 2 is provided at the outflow port. Further, the aerobic tank 1 is provided with a partition plate 9 that divides the aerobic tank into two parts, and both ends of the partition plate 9 are open. Then, on the inlet 7 and outlet 8 sides of the aerobic tank 1, a propeller-type stirrer 10 is installed in the guide pipe 11 at the opening of the partition plate 9.
It is supported and provided by.
【００１５】この汚水処理槽においては、プロペラ式攪
拌機１０を作動させることにより、槽内に水流が生じ、
流入口７からの汚水は、流出口８に逆流することなく、
ディフューザ３により十分に曝気されると共に固定化担
体２より生物処理を受けて、一部は流出口８から流出
し、残部はプロペラ式攪拌機１０により固定化担体と共
に槽内を還流する。この際、流出口にはスクリーン等の
担体分離器が設けられているので、流出口からは処理水
のみが流出し、固定化担体は分離して槽内を循環し、槽
内に固定化担体の濃淡の分布ができることはない。In this sewage treatment tank, by operating the propeller stirrer 10, a water flow is generated in the tank,
Sewage from the inflow port 7 does not flow back to the outflow port 8,
After being sufficiently aerated by the diffuser 3 and subjected to biological treatment by the immobilization carrier 2, a part of it is discharged from the outflow port 8, and the rest is refluxed in the tank together with the immobilization carrier by the propeller stirrer 10. At this time, since a carrier separator such as a screen is provided at the outflow port, only the treated water flows out from the outflow port, the immobilized carrier is separated and circulated in the tank, and the immobilized carrier is placed in the tank. There is no distribution of shading.
【００１６】また、上記処理槽において、プロペラ式攪
拌機１０はガイドパイプ１１に沿って槽内を上下に移動
させながら実施することもできるし、仕切板９を延長し
て処理槽に接合し、流入口７と流出口８の部分を分離し
て、該仕切板９のプロペラ式攪拌機１０の設置部分のみ
を切り欠いて実施することもできる。この場合のプロペ
ラ式攪拌機１０の設置位置は任意に設定することができ
るが、水深の中央部から下方とするのがよい。本例で
は、担体移送手段をプロペラ式攪拌機としたが、ジェッ
トポンプ等のポンプとしても良い。Further, in the above treatment tank, the propeller type agitator 10 can be carried out while moving the inside of the treatment vessel up and down along the guide pipe 11, or by extending the partition plate 9 to join the treatment tank and flowing it. It is also possible to separate the portion of the inlet 7 and the portion of the outlet 8 and cut out only the portion of the partition plate 9 where the propeller stirrer 10 is installed. In this case, the installation position of the propeller stirrer 10 can be set arbitrarily, but it is preferable to set it below the central portion of the water depth. In this example, the carrier transfer means is a propeller type agitator, but it may be a pump such as a jet pump.
【００１７】実施例２ 図４は、本発明の汚水処理槽の他の例を示す好気槽の平
面図であり、図５は図４の正面断面図、図６は図４の側
面断面図である。図４〜図６において、図１〜図３と同
一の符号は同じ意味を有し、そして、実施例１との相違
点は、固定化担体２の移送手段のみにある。図４〜図６
においては、固定化担体２は、吸引式エアレータ型のプ
ロペラ式攪拌機１２と阻流板１３とによって移送され
る。阻流板１３は、流入口７側をかこって設けられ、流
出口８側には阻流板１３ａが上部を切り欠いて設けら
れ、また、流入口７側は下部に切り欠きを有する阻流板
１３ｂが設けられている。Embodiment 2 FIG. 4 is a plan view of an aerobic tank showing another example of the sewage treatment tank of the present invention, FIG. 5 is a front sectional view of FIG. 4, and FIG. 6 is a side sectional view of FIG. Is. 4 to 6, the same reference numerals as those in FIGS. 1 to 3 have the same meanings, and the only difference from the first embodiment is the transfer means of the immobilization carrier 2. 4 to 6
In the above, the immobilization carrier 2 is transferred by the suction type aerator type propeller stirrer 12 and the baffle plate 13. The baffle plate 13 is provided so as to cover the inflow port 7 side, the baffle plate 13a is provided at the outflow port 8 side by notching the upper part, and the inflow port 7 side has a notch at the lower part. A plate 13b is provided.
【００１８】そして、プロペラ式攪拌機１２は、阻流板
１３でかこわれた流入部に、下方に向けて取り付けら
れ、このプロペラ式攪拌機１２を作動させることによ
り、流入した汚水は阻流板１３ｂの下部から曝気槽内に
流入し、固定化担体と接触して生物処理を受けて、一部
が流出口８から処理水として流出し、残部は、固定化担
体と共に、阻流板１３ａの上部から流入部に流入して槽
内を循環する。このように、固定化担体は実施例１と同
様に槽内を均等に循環して担体の片寄りをなくする。な
お、本例では移送手段としてプロペラ式攪拌機を用いた
が、エジェクタ式等のポンプを用いても、また、中央仕
切板の反対側にエアリフトを用いても同等の効果が得ら
れる。The propeller-type stirrer 12 is attached downward to the inflow portion covered by the baffle plate 13. By operating the propeller-type stirrer 12, the inflowing sewage is discharged from the baffle plate 13b. It flows into the aeration tank from the lower part, comes into contact with the immobilization carrier, undergoes biological treatment, and partly flows out as treated water from the outflow port 8, and the rest together with the immobilization carrier from the upper part of the baffle plate 13a. It flows into the inflow section and circulates in the tank. In this way, the immobilized carrier is evenly circulated in the tank in the same manner as in Example 1 to eliminate the deviation of the carrier. Although a propeller type agitator was used as the transfer means in this example, the same effect can be obtained by using an ejector type pump or an air lift on the opposite side of the central partition plate.
【００１９】実施例３ 次に、本発明の汚水処理槽の実施例１で示した好気槽を
用いた循環式硝化脱窒法について述べる。図７に、本発
明の硝化脱窒素化に用いる装置のフローシートの概略平
面図を示し、図８に図７の正面断面図を示す。図７、図
８において、好気槽１は実施例１で示した好気槽を用い
ており、同一の符号は同一意味を有する。１４は無酸素
槽、１９は最終沈殿池であり、無酸素槽１４には水中ミ
キサー１５が設置されている。Example 3 Next, a circulation type nitrification denitrification method using the aerobic tank shown in Example 1 of the sewage treatment tank of the present invention will be described. FIG. 7 shows a schematic plan view of a flow sheet of an apparatus used for nitrification denitrification of the present invention, and FIG. 8 shows a front sectional view of FIG. 7. 7 and 8, the aerobic tank 1 uses the aerobic tank shown in the first embodiment, and the same reference numerals have the same meanings. An oxygen-free tank 14 and a final settling tank 19 are provided with an underwater mixer 15 in the oxygen-free tank 14.
【００２０】この図７、図８を用いて硝化脱窒法を説明
すると、汚水は流入管１８から無酸素槽１４に、２０か
らの循環硝化液及び２４からの返送汚泥と共に流入し、
無酸素槽１４と好気槽１を仕切る隔壁１７の下部に設け
た流入口７を通り、好気槽１に流入する。好気槽１では
プロペラ式攪拌機１０の作動により、循環流が形成され
ており、ディフューザ３からの曝気と固定化担体２の働
きで硝化処理され、処理水は一部担体分離器を通り流出
口８から流出トラフを流れ、流出液は一部２１が最終沈
殿池１９に、残部２０が無酸素槽１４に循環されて脱窒
される。最終沈殿池１９では活性汚泥が分離され、一部
が返送汚泥２４として、無酸素槽１４に返送され、残部
が余剰汚泥２５として抜き出される。処理水は２２から
排出される。Explaining the nitrification denitrification method with reference to FIGS. 7 and 8, sewage flows from the inflow pipe 18 into the oxygen-free tank 14 together with the circulating nitrification liquid from 20 and the returned sludge from 24,
It flows into the aerobic tank 1 through the inflow port 7 provided in the lower portion of the partition wall 17 that separates the anoxic tank 14 and the aerobic tank 1. In the aerobic tank 1, a circulating flow is formed by the operation of the propeller type agitator 10, and aeration is performed from the diffuser 3 and nitrification treatment is performed by the immobilized carrier 2, and the treated water partially passes through the carrier separator and flows out. A part 21 of the effluent is circulated to the final settling basin 19 and the remaining part 20 is circulated to the anoxic tank 14 for denitrification. In the final settling tank 19, activated sludge is separated, part of it is returned to the oxygen-free tank 14 as return sludge 24, and the rest is extracted as excess sludge 25. Treated water is discharged from 22.
【００２１】次に、図７及び図８により処理した循環式
窒素除去プロセスの適用例を以下に示す。 （ａ）被処理水：都市下水 （ｂ）装置構成 無酸素槽・・・４００ｍ3 （滞留時間４．０時間） 好気槽 ・・・４００ｍ3 （滞留時間４．０時間） ────────────────────────── 計 ８００ｍ3 （ＨＲＴ＝８．０時間） ・処理水量 ： １００ｍ3 ／時 ・返送汚泥量： ５０ｍ3 ／時Next, an example of application of the circulation type nitrogen removal process processed according to FIGS. 7 and 8 is shown below. (A) Water to be treated: municipal sewage (b) Equipment configuration Oxygen tank: 400 m 3 (retention time 4.0 hours) Aerobic tank: 400 m 3 (retention time 4.0 hours) ──── ────────────────────── Total 800m 3 (HRT = 8.0 hours) ・ Treatment water amount: 100m 3 / hour ・ Returned sludge amount: 50m 3 / hour
【００２２】・硝化液循環量：２００ｍ3 ／時 ・通気量 ：６００Ｎｍ3 ／時 ・ＭＬＳＳ ：２０００ｍｇ／リットル ・プロペラ式攪拌機：０．９ｋｗ，励起流量４８ｍ3 ／
分（ＩＴＴフリクト社製フロークリエータ） （ｃ）運転結果 好気槽における担体濃度分布の形成は全く認められなか
った。また、硝化性能の低下もまったく認められなかっ
た。・ Nitrification solution circulation rate: 200 m 3 / hour ・ Aeration rate: 600 Nm 3 / hour ・ MLSS: 2000 mg / liter ・ Propeller type stirrer: 0.9 kw, excitation flow rate 48 m 3 /
Min (ITT Flict flow creator) (c) Operation results No formation of carrier concentration distribution was observed in the aerobic tank. Further, no reduction in nitrification performance was observed.
【００２３】[0023]
【発明の効果】以上述べたように、本発明によれば微生
物固定化担体を利用する汚水処理装置において、担体濃
度分布の形成を防止・解消できる。As described above, according to the present invention, it is possible to prevent / eliminate the formation of carrier concentration distribution in the sewage treatment apparatus utilizing the microorganism-immobilized carrier.
【図１】本発明の汚水処理槽の一例である好気槽の平面
図。FIG. 1 is a plan view of an aerobic tank which is an example of a wastewater treatment tank of the present invention.
【図２】図１の正面断面図。FIG. 2 is a front sectional view of FIG.
【図３】図１の側面断面図。FIG. 3 is a side sectional view of FIG.
【図４】本発明の汚水処理槽の他の例である好気槽の平
面図。FIG. 4 is a plan view of an aerobic tank which is another example of the wastewater treatment tank of the present invention.
【図５】図４の正面断面図。5 is a front sectional view of FIG.
【図６】図５の側面断面図。6 is a side sectional view of FIG.
【図７】本発明の循環式硝化脱窒素法に用いる装置のフ
ローシートの概略平面図。FIG. 7 is a schematic plan view of a flow sheet of an apparatus used in the circulating nitrification and denitrification method of the present invention.
【図８】図７の正面断面図。8 is a front cross-sectional view of FIG.
【図９】従来の汚水処理槽の概略断面図。FIG. 9 is a schematic sectional view of a conventional wastewater treatment tank.
１：好気槽、２：固定化担体、３：ディフューザ、４：
ブロワ、５：空気管、６：担体分離機、７：流入口、
８：流出口、９：仕切板、１０：プロペラ式攪拌機、１
１：ガイドパイプ、１２：プロペラ式攪拌機（吸引式エ
アレータ型）、１３：阻流板、１４：無酸素槽、１５：
水中ミキサー、１６：流出トラフ、１７：隔壁、１８：
汚水流入管、１９：最終沈殿池、２０：循環硝化液管、
２１：最終沈殿池流入管、２２：処理水流出管、２３：
ポンプ、２４：返送汚泥管、２５：余剰汚泥管1: aerobic tank, 2: immobilization carrier, 3: diffuser, 4:
Blower, 5: air pipe, 6: carrier separator, 7: inlet,
8: Outflow port, 9: Partition plate, 10: Propeller type agitator, 1
1: Guide pipe, 12: Propeller type agitator (suction type aerator type), 13: Barrier plate, 14: Oxygen-free tank, 15:
Submersible mixer, 16: outflow trough, 17: bulkhead, 18:
Sewage inflow pipe, 19: Final sedimentation tank, 20: Circulating nitrification liquid pipe,
21: Final sedimentation tank inflow pipe, 22: Treated water outflow pipe, 23:
Pump, 24: Return sludge pipe, 25: Surplus sludge pipe
フロントページの続き (72)発明者 山田 武彦 東京都港区港南１丁目６番27号 荏原イン フィルコ株式会社内Front page continuation (72) Inventor Takehiko Yamada 1-6-27 Konan, Minato-ku, Tokyo Ebara-in Filco Co., Ltd.
Claims (6)
持して汚水を処理する方法において、該担体を浮遊保持
する槽内に強制的に水流を形成し、循環流を生じさせて
担体の分布を均一化することを特徴とする汚水処理方
法。1. In a method for treating wastewater by holding a carrier on which microorganisms are immobilized in a floating state, a water flow is forcibly formed in a tank for holding the carrier in a floating state, and a circulating flow is generated to generate a carrier flow of the carrier. A sewage treatment method characterized by uniform distribution.
持する汚水処理槽において、槽内に槽内水を垂直方向に
仕切る仕切板を配備し、該仕切板の一端を前記担体及び
水が流通可能に開放し、前記仕切板の他端側に該仕切板
をはさんで原水流入部と処理水流出部を設け、該流出部
には前記担体の流出を防止するための手段を設けると共
に、前記仕切板をはさんで流出部から流入部に担体を移
送する移送手段を設けたことを特徴とする汚水処理槽。2. In a sewage treatment tank for holding a carrier on which microorganisms are immobilized in a floating state, a partition plate for vertically partitioning the water in the tank is provided in the tank, and one end of the partition plate is provided with the carrier and water. A raw water inflow part and a treated water outflow part are provided on the other end side of the partition plate with the partition plate sandwiched between them so as to be flowable, and a means for preventing outflow of the carrier is provided in the outflow part. A sewage treatment tank comprising a transfer means for transferring the carrier from the outflow portion to the inflow portion across the partition plate.
端部に開口を設け、該開口を通して前記担体を移送する
ための強制水流を形成する手段であることを特徴とする
請求項２記載の汚水処理槽。3. The carrier transfer means is means for providing an opening at the other end of the partition plate and forming a forced water flow for transferring the carrier through the opening. Sewage treatment tank described.
ラ式攪拌機、ポンプ、エアリフトであることを特徴とす
る請求項３記載の汚水処理槽。4. The sewage treatment tank according to claim 3, wherein the means for forming the forced water flow is a propeller stirrer, a pump, and an air lift.
供給手段を設けたことを特徴とする請求項２、３又は４
記載の汚水処理槽。5. The treatment tank is provided with an oxygen-containing gas supply means at the bottom of the tank.
Sewage treatment tank described.
置を順次連結し、好気処理装置流出水を無酸素処理装置
へ循環し、沈殿装置の沈殿汚泥を無酸素処理装置へ返送
する循環式硝化脱窒素処理装置、又は、更に無酸素処理
装置の前に嫌気処理装置を設け、沈殿装置の沈殿汚泥を
嫌気処理装置へ返送する、脱窒素・脱りん活性汚泥処理
装置において、前記好気処理装置に請求項５記載の汚水
処理槽を用いることを特徴とする汚水処理装置。6. An anoxic treatment device, an aerobic treatment device, and a sedimentation device are sequentially connected, the outflow water of the aerobic treatment device is circulated to the anoxic treatment device, and the settled sludge of the sedimentation device is returned to the anoxic treatment device. In the denitrification / dephosphorization activated sludge treatment device, which is provided with an anaerobic treatment device in front of the circulation type nitrification denitrification treatment device or further the anoxic treatment device and returns the sludge settling in the precipitation device to the anaerobic treatment device, A sewage treatment apparatus comprising the sewage treatment tank according to claim 5 as an air treatment apparatus.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP30710493A JPH07136678A (en) | 1993-11-15 | 1993-11-15 | Wastewater treatment method and tank |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP30710493A JPH07136678A (en) | 1993-11-15 | 1993-11-15 | Wastewater treatment method and tank |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH07136678A true JPH07136678A (en) | 1995-05-30 |
Family
ID=17965084
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP30710493A Pending JPH07136678A (en) | 1993-11-15 | 1993-11-15 | Wastewater treatment method and tank |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH07136678A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2011000555A (en) * | 2009-06-19 | 2011-01-06 | Kubota Corp | Wastewater treatment facility and method of rebuilding the same |
| CN104229992A (en) * | 2014-09-10 | 2014-12-24 | 温州大学 | Device suitable for subsurface infiltration treatment of wastewater and use method of device |
| CN104276644A (en) * | 2013-07-10 | 2015-01-14 | 北京师范大学 | Technology of rapidly processing abrupt arsenic-polluted river water body in situ by using water-permeable adsorption dam |
| CN104528924A (en) * | 2015-02-03 | 2015-04-22 | 武汉中科水生环境工程股份有限公司 | Polluted water body in-situ treatment purification plant |
| CN106045019A (en) * | 2015-04-09 | 2016-10-26 | 积水设备***株式会社 | Carrier for holding microorganism, wastewater treatment method and wastewater treatment system |
-
1993
- 1993-11-15 JP JP30710493A patent/JPH07136678A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2011000555A (en) * | 2009-06-19 | 2011-01-06 | Kubota Corp | Wastewater treatment facility and method of rebuilding the same |
| CN104276644A (en) * | 2013-07-10 | 2015-01-14 | 北京师范大学 | Technology of rapidly processing abrupt arsenic-polluted river water body in situ by using water-permeable adsorption dam |
| CN104229992A (en) * | 2014-09-10 | 2014-12-24 | 温州大学 | Device suitable for subsurface infiltration treatment of wastewater and use method of device |
| CN104229992B (en) * | 2014-09-10 | 2016-08-24 | 温州大学 | A kind of device being applicable to underground sewage percolating process and using method thereof |
| CN104528924A (en) * | 2015-02-03 | 2015-04-22 | 武汉中科水生环境工程股份有限公司 | Polluted water body in-situ treatment purification plant |
| CN106045019A (en) * | 2015-04-09 | 2016-10-26 | 积水设备***株式会社 | Carrier for holding microorganism, wastewater treatment method and wastewater treatment system |
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