JPH05337485A - Biological sewage treating device - Google Patents
Biological sewage treating deviceInfo
- Publication number
- JPH05337485A JPH05337485A JP4173679A JP17367992A JPH05337485A JP H05337485 A JPH05337485 A JP H05337485A JP 4173679 A JP4173679 A JP 4173679A JP 17367992 A JP17367992 A JP 17367992A JP H05337485 A JPH05337485 A JP H05337485A
- Authority
- JP
- Japan
- Prior art keywords
- aeration
- carrier
- biological sewage
- sludge
- sedimentation basin
- 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
- Biological Treatment Of Waste Water (AREA)
- Activated Sludge Processes (AREA)
- Aeration Devices For Treatment Of Activated Polluted Sludge (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、下水・産業排水等の有
機物処理を行う生物学的汚水処理装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a biological sewage treatment apparatus for treating organic substances such as sewage and industrial wastewater.
【０００２】[0002]
【従来の技術】高速エアレーション沈澱池は、従来別個
の水槽を用いて行われていた活性汚泥法中の曝気プロセ
スと最終沈澱プロセスを、内部をコンクリートあるいは
鋼板製の隔壁によって仕切られた単一の水槽内で実行す
ることにより、返送汚泥プロセスを省略し、処理に要す
る電力費の低減を図ると共に、曝気部内の有機性浮遊物
質量（Ｍｉｘｅｄ Ｌｉｑｕｏｒ Ｖｏｌａｔｉｌｅ
Ｓｕｓｐｅｎｄｅｄ Ｓｏｌｉｄｓ（以下ＭＬＶＳＳと
記述する））を２，５００〜５，０００ｍｇ／ｌの高濃
度に保持することにより排水処理能力を向上させ、従来
６〜８時間を要するとされていた曝気を約２〜３時間で
行わせることにより排水処理設備の設置面積を低減でき
る装置である。2. Description of the Related Art A high-speed aeration sedimentation basin is used to separate the aeration process and the final sedimentation process in the activated sludge method, which were conventionally performed using separate water tanks, into a single partition partitioned by concrete or steel plate partitions. By executing in the water tank, the return sludge process can be omitted, the electric power cost required for the treatment can be reduced, and the amount of organic suspended solids (mixed liquid volatility) in the aeration part can be reduced.
By maintaining Suspended Solids (hereinafter referred to as MLVSS)) at a high concentration of 2,500 to 5,000 mg / l, the wastewater treatment capacity is improved, and aeration which was conventionally required to take 6 to 8 hours is about 2 This is a device that can reduce the installation area of wastewater treatment equipment by performing the treatment within 3 hours.
【０００３】この高速エアレーション沈澱池の曝気部に
は攪拌機が設置されており、流入エアーの微細化と完全
混合を助けている。A stirrer is installed in the aeration section of this high-speed aeration settling basin to assist in the atomization of the inflowing air and complete mixing.
【０００４】この高速エアレーション沈澱池の処理水質
の向上、処理の安定化、ＭＬＶＳＳの高濃度保持を目的
に固定化担体を添加することが特願昭６３−３３６３６
号および特開平３−１７８３９５号公報に提案されてい
る。しかし、固定化担体を添加するため、従来の高速エ
アレーション沈澱池に設置されている攪拌機では装置の
機能および処理の目標を果たすことができない。すなわ
ち、流入エアーの微細化、曝気部内の完全混合、担体の
浮上を達成することができない。Japanese Patent Application No. 63-33636 discloses that an immobilized carrier is added for the purpose of improving the quality of treated water in this high-speed aeration sedimentation basin, stabilizing the treatment, and maintaining a high concentration of MLVSS.
And Japanese Patent Laid-Open No. 3-178395. However, since the immobilized carrier is added, the agitator installed in the conventional high-speed aeration sedimentation tank cannot fulfill the function of the apparatus and the target of treatment. That is, it is impossible to achieve finer inflow air, complete mixing in the aeration section, and floating of the carrier.
【０００５】[0005]
【発明が解決しようとする課題】従来の高速エアレーシ
ョン沈澱池に設置されている攪拌機は流入エアーの微細
化と完全混合を目的としており、担体の浮上については
特に考慮していない。つまり、攪拌強度が小さく、比重
の大きい担体は浮上できず底部に堆積してしまう。ま
た、単に回転数を上げても活性汚泥フロックから担体が
剥離してしまい、処理水質の向上、処理の安定化にはつ
ながらない。The conventional stirrer installed in the high-speed aeration sedimentation basin aims at making the inflowing air finer and completely mixing it, and does not particularly consider the floating of the carrier. That is, a carrier having a low stirring strength and a large specific gravity cannot be floated and is deposited on the bottom. Further, even if the rotation speed is simply increased, the carrier is separated from the activated sludge flocs, which does not lead to improvement of treated water quality and stabilization of treatment.
【０００６】そこで、本発明は固定化担体を添加する高
速エアレーション沈澱池において、流入エアーの微細
化、完全混合、担体の浮上を達成できる合理的な装置を
提供するものである。Therefore, the present invention provides a rational apparatus capable of achieving fine atomization of inflowing air, complete mixing, and floating of a carrier in a high-speed aeration sedimentation tank to which an immobilized carrier is added.
【０００７】[0007]
【課題を解決するための手段】本発明の要旨は以下の通
りである。The gist of the present invention is as follows.
【０００８】 固定化担体を用いる高速エアレーショ
ン沈澱池の曝気部に設置する攪拌機の下部をタービン
翼、上部をプロペラあるいはパドル翼とし、微細気泡散
気管を曝気部底面に配置したことを特徴とする生物学的
汚水処理装置。High-speed aeration using an immobilized carrier A lower part of a stirrer installed in the aeration part of a settling basin is a turbine blade, an upper part is a propeller or paddle blade, and a fine bubble diffuser is arranged on the bottom surface of the aeration part. Sewage treatment equipment.
【０００９】 固定化担体が高炉水砕スラグ微粉であ
ることを特徴とする前記の生物学的汚水処理装置。[0009] The biological sewage treatment apparatus as described above, wherein the immobilizing carrier is fine granulated blast furnace slag.
【００１０】 微細気泡散気管に逆流防止機構を設け
たことを特徴とする前記の生物学的汚水処理装置。The biological sewage treatment apparatus described above, wherein a backflow prevention mechanism is provided in the fine bubble diffusing tube.
【００１１】[0011]
【作用】以下、本発明について詳細に説明する。The present invention will be described in detail below.
【００１２】図１は、本発明の装置内部の機構が明らか
になるように縦方向断面を示したものである。水槽本体
１は、内筒４と外筒８によって曝気部５と循環部９と沈
澱部１０に分割される。内筒４と水槽本体１に囲まれた
曝気部５には、前述の固定化担体が添加されている。な
お、この固体化担体はゼオライト・珪砂・活性炭等どん
なものでも良いが、高炉水砕スラグが最も好ましい。FIG. 1 is a longitudinal cross-sectional view to clarify the internal mechanism of the device of the present invention. The water tank body 1 is divided into an aeration part 5, a circulation part 9 and a sedimentation part 10 by an inner cylinder 4 and an outer cylinder 8. The above-mentioned immobilization carrier is added to the aeration section 5 surrounded by the inner cylinder 4 and the water tank body 1. The solidified carrier may be any of zeolite, silica sand, activated carbon, etc., but granulated blast furnace slag is most preferable.
【００１３】流入水Ｗは水槽本体１底付近の流入口２か
ら曝気部５内に流入し、散気装置３から噴出する空気Ａ
Ｏおよび攪拌機１２により曝気部５内を循環させられ、
生物処理が施される。内筒４の上部から溢れ出た一時処
理水Ｗ1 と固定化担体の周りに付着発達した活性汚泥６
は、内筒４と外筒８に囲まれた循環部９を流下する。こ
の過程で生物処理が更に進行するとともに、比較的比重
の大きい汚泥が沈降分離される。The inflow water W flows from the inflow port 2 near the bottom of the water tank body 1 into the aeration section 5 and is ejected from the air diffuser 3 as air A.
It is circulated in the aeration part 5 by O and the stirrer 12,
Biological treatment is applied. Temporary treated water W 1 overflowing from the upper part of the inner cylinder 4 and activated sludge 6 adhering and developed around the immobilization carrier
Flows down the circulating portion 9 surrounded by the inner cylinder 4 and the outer cylinder 8. In this process, biological treatment proceeds further, and sludge having a relatively large specific gravity is settled and separated.
【００１４】循環部９を経て外筒８の下部から外側に溢
れ出た二次処理水Ｗ2 は、沈澱部１０の中を上向きに流
れて行く。ここでは、一般の上向流式沈澱池と同じ原理
で活性汚泥が沈澱分離されるが、従来の活性汚泥に比べ
て固定化担体を含有しているため比重が大きく、曝気部
５内の流れに起因する沈澱部１０内の流れによって処理
水中に活性汚泥が混入することはない。上澄水Ｗ3 は流
出溝１１から排出される。The secondary treated water W 2 overflowing from the lower part of the outer cylinder 8 to the outside through the circulation part 9 flows upward in the precipitation part 10. Here, activated sludge is settled and separated according to the same principle as a general upward flow type sedimentation basin, but it has a larger specific gravity than the conventional activated sludge because it contains an immobilized carrier, and the flow in the aeration section 5 is large. The activated sludge is not mixed in the treated water due to the flow in the precipitation section 10 caused by the above. The supernatant water W 3 is discharged from the outflow groove 11.
【００１５】循環部９と沈澱部１０において処理水から
分離した固定化担体を含有する分離汚泥は内筒４および
外筒８と水槽本体１との間を自重により落下し、再び曝
気部５内に戻る。余剰汚泥Ｄ1 は汚泥排出口７より排出
され、別途処理される。The separated sludge containing the immobilized carrier separated from the treated water in the circulation part 9 and the sedimentation part 10 falls between the inner cylinder 4 and the outer cylinder 8 and the water tank body 1 by its own weight, and again in the aeration part 5. Return to. Excess sludge D 1 is discharged from the sludge discharge port 7 and separately processed.
【００１６】以上の点は従来の高速エアレーション沈澱
池と変わらない。本発明において工夫した点は以下の３
点である。The above points are the same as the conventional high-speed aeration sedimentation basin. The points devised in the present invention are as follows.
It is a point.
【００１７】まず１点目は、散気装置３に微細気泡散気
管を用いたことである。従来は、散気孔方式、あるいは
配管のみを設置し、攪拌機１２の回転により気泡の微細
化を図っていた。しかし、後述する様に担体の浮上機能
を攪拌翼に持たせる事で、気泡の微細化については散気
装置にその機能を持たせた。微細気泡散気管はセラミッ
クスあるいはダイヤフラム等特に種類はどんなものでも
良いが、微細な担体を用いる場合、逆流防止機構を備え
たものが好ましい。First, the first point is that the air diffusing device 3 uses a fine bubble diffusing tube. Conventionally, the air diffuser method is used or only the pipe is installed, and the agitator 12 is rotated to make the bubbles fine. However, as described later, the aerating device was provided with the function of floating the carrier so that the aeration device had the function of making the bubbles finer. The fine bubble diffusing tube may be of any type such as ceramics or diaphragm, but when a fine carrier is used, it is preferable to have a backflow preventing mechanism.
【００１８】２点目は、下部攪拌翼に担体の浮上とエア
ーの横方向攪拌が行えるタービン翼を設けたことであ
る。タービン翼は、内筒スカート末端から引き込まれる
汚泥の流れを阻害しない様に、下部から上部に抜ける流
れをつくるタイプが好ましい。また、タービン翼の回転
により活性汚泥の解体や担体の剥離が起こらない様に、
タービン翼の形状および回転数を決定する必要がある。The second point is that the lower stirring blade is provided with a turbine blade capable of floating the carrier and stirring air laterally. The turbine blade is preferably of a type that creates a flow from the lower part to the upper part so as not to impede the flow of sludge drawn from the end of the inner cylinder skirt. Also, to prevent disassembly of the activated sludge and separation of the carrier due to rotation of the turbine blade,
It is necessary to determine the shape and speed of the turbine blade.
【００１９】３点目は、攪拌機上部に上向流を均一化す
るプロペラあるいはパドル翼を設置したことである。す
なわち、下部に設けたタービン翼の回転により作られる
上下流により内筒から起流する循環流が不均一になる恐
れがあるため、これを緩和し、均一な循環流を作るため
である。The third point is that a propeller or paddle blade for uniformizing the upward flow is installed above the stirrer. That is, there is a possibility that the circulating flow originating from the inner cylinder may become non-uniform due to the upstream and downstream created by the rotation of the turbine blades provided at the lower part, and this is alleviated to create a uniform circulating flow.
【００２０】以上の３つの工夫により、固定化担体を用
いても流入エアーの微細化、完全混合、担体の浮上が十
分達成でき、処理水質の向上、処理の安定、高濃度ＭＬ
ＶＳＳの保持が図られる。With the above three measures, even if an immobilized carrier is used, the inflowing air can be made finer, completely mixed, and the carrier can be floated sufficiently, resulting in improved quality of treated water, stable treatment, and high concentration ML.
VSS is maintained.
【００２１】[0021]
【実施例】水槽本体（４．２５ｍφ×４．５ｍ）を内筒
および外筒によって曝気部（２１ｍ3 ）、沈澱部（１１
ｍ3 ）に仕切り、曝気部に粒径１〜５０μの高炉水砕ス
ラグの微粒を浮遊濃度２０００ｍｇ／ｌになる様に添加
した。また、水槽中央には、下部タービン翼、上部プロ
ペラ翼の攪拌機を設置し、曝気部底部面全面に微細気泡
散気管を配置し全面曝気した。EXAMPLE An aeration section (21 m 3 ) and a precipitation section (11) of a water tank body (4.25 mφ × 4.5 m) are formed by an inner cylinder and an outer cylinder.
m 3 ), and fine particles of granulated blast furnace slag having a particle size of 1 to 50 μm were added to the aeration section so that the floating concentration became 2000 mg / l. Further, in the center of the water tank, an agitator with a lower turbine blade and an upper propeller blade was installed, and a fine bubble diffusing tube was placed on the entire bottom surface of the aeration section for aeration.
【００２２】原水ＢＯＤ濃度１２０ｍｇ／ｌ、ＳＳ１３
０ｍｇ／ｌの生活排水を供給し、曝気部の滞留時間３時
間による連続処理を行った。その結果、安定した処理が
でき、処理水ＢＯＤ濃度１３ｍｇ／ｌ、ＳＳ濃度７ｍｇ
／ｌであった。また、この間、水砕の剥離、汚泥の解
体、水砕の沈澱もなかった。Raw water BOD concentration 120 mg / l, SS13
Domestic wastewater of 0 mg / l was supplied, and continuous treatment was performed with a residence time of 3 hours in the aeration section. As a result, stable treatment can be performed, and the treated water BOD concentration is 13 mg / l and SS concentration is 7 mg.
/ L. During this period, neither peeling of water granules, disassembly of sludge, nor precipitation of water granules was observed.
【００２３】[0023]
【発明の効果】高速エアレーション沈澱池に固定化担体
を用いる活性汚泥処理において、担体の剥離、汚泥の解
体、担体の沈澱堆積を生じることなく、安定した処理を
行うことができる。INDUSTRIAL APPLICABILITY In the activated sludge treatment using the immobilized carrier in the high-speed aeration sedimentation basin, a stable treatment can be carried out without causing the carrier to be peeled, sludge to be dismantled, and the carrier to be deposited and accumulated.
【図１】本発明の生物学的汚水処理装置の断面図であ
る。FIG. 1 is a sectional view of a biological sewage treatment apparatus of the present invention.
１ 水槽本体 ２ 流入口 ３ 散気装置 ４ 内筒 ５ 曝気部 ６ 活性汚泥 ７ 汚泥排出口 ８ 外筒 ９ 循環部 １０ 沈澱部 １１ 流出溝 １２ 攪拌機 １３ 内筒傘部 Ｗ 流入水 Ｗ1 一次処理水 Ｗ2 二次処理水 Ｗ3 上澄水 ＡＯ、Ａ 空気 Ｄ1 余剰汚泥1 Water tank body 2 Inlet 3 Air diffuser 4 Inner cylinder 5 Aeration part 6 Activated sludge 7 Sludge discharge port 8 Outer cylinder 9 Circulation part 10 Precipitation part 11 Outflow groove 12 Stirrer 13 Inner cylinder Umbrella W Inflow W 1 Primary treated water W 2 Secondary treated water W 3 Clear water AO, A Air D 1 Excess sludge
Claims (3)
沈澱池の曝気部に設置する攪拌機の下部をタービン翼、
上部をプロペラあるいはパドル翼とし、微細気泡散気管
を曝気部底面に配置したことを特徴とする生物学的汚水
処理装置。1. A lower part of an agitator installed in an aeration section of a high-speed aeration sedimentation basin using an immobilized carrier is a turbine blade,
A biological sewage treatment apparatus characterized in that the upper part is a propeller or paddle blade and the fine bubble diffusing pipe is arranged on the bottom face of the aeration part.
ことを特徴とする請求項１記載の生物学的汚水処理装
置。2. The biological sewage treatment apparatus according to claim 1, wherein the immobilization carrier is ground granulated blast furnace slag powder.
ことを特徴とする請求項１記載の生物学的汚水処理装
置。3. The biological sewage treatment apparatus according to claim 1, wherein a backflow prevention mechanism is provided in the fine bubble diffusing tube.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4173679A JP2564228B2 (en) | 1992-06-09 | 1992-06-09 | Biological sewage treatment equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4173679A JP2564228B2 (en) | 1992-06-09 | 1992-06-09 | Biological sewage treatment equipment |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH05337485A true JPH05337485A (en) | 1993-12-21 |
| JP2564228B2 JP2564228B2 (en) | 1996-12-18 |
Family
ID=15965094
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4173679A Expired - Lifetime JP2564228B2 (en) | 1992-06-09 | 1992-06-09 | Biological sewage treatment equipment |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2564228B2 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102815784A (en) * | 2012-08-29 | 2012-12-12 | 深圳清华大学研究院 | Aerobic three-phase separator and application method thereof in sewage treatment |
| KR200475766Y1 (en) * | 2014-04-08 | 2015-01-02 | 김희철 | Water quality improvement apparatus using aeration and the flow of water |
| CN107651749A (en) * | 2017-10-31 | 2018-02-02 | 中海油天津化工研究设计院有限公司 | A kind of integrated bioreactor of pre-treating high concentration oil refining wastewater |
-
1992
- 1992-06-09 JP JP4173679A patent/JP2564228B2/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102815784A (en) * | 2012-08-29 | 2012-12-12 | 深圳清华大学研究院 | Aerobic three-phase separator and application method thereof in sewage treatment |
| KR200475766Y1 (en) * | 2014-04-08 | 2015-01-02 | 김희철 | Water quality improvement apparatus using aeration and the flow of water |
| CN107651749A (en) * | 2017-10-31 | 2018-02-02 | 中海油天津化工研究设计院有限公司 | A kind of integrated bioreactor of pre-treating high concentration oil refining wastewater |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2564228B2 (en) | 1996-12-18 |
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