JPH11253711A - Carrier separation apparatus - Google Patents
Carrier separation apparatusInfo
- Publication number
- JPH11253711A JPH11253711A JP10059669A JP5966998A JPH11253711A JP H11253711 A JPH11253711 A JP H11253711A JP 10059669 A JP10059669 A JP 10059669A JP 5966998 A JP5966998 A JP 5966998A JP H11253711 A JPH11253711 A JP H11253711A
- Authority
- JP
- Japan
- Prior art keywords
- screen
- carrier
- separation device
- carrier separation
- tank
- 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)
- Filtration Of Liquid (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、微生物保持用の担
体を投入して下水等、排水の微生物処理を行わせる処理
槽のための、担体分離装置に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a carrier separation device for a treatment tank in which a carrier for holding microorganisms is charged and a microorganism such as sewage is treated with microorganisms.
【０００２】[0002]
【従来の技術】下水中のＢＯＤ，Ｎ，Ｐ等を微生物を利
用して除去する生物処理法においては、槽内の硝化菌や
脱窒菌等の微生物濃度を高めるために、微生物保持用の
多孔質の担体を槽内に投入して処理速度の向上を図るこ
とがある。この場合、処理槽からの流出水に同伴して担
体が流出することを防止するために、担体分離装置が必
要となる。2. Description of the Related Art In a biological treatment method for removing BOD, N, P and the like in sewage using microorganisms, a porous material for retaining microorganisms is required to increase the concentration of microorganisms such as nitrifying bacteria and denitrifying bacteria in a tank. In some cases, a high-quality carrier is put into a tank to improve the processing speed. In this case, a carrier separation device is required to prevent the carrier from flowing out along with the effluent from the treatment tank.
【０００３】図３は従来の代表的な担体分離装置を示す
図であり、１は生物処理が行われる深さが５ｍ程度の処
理槽、２はその底面に設置された散気装置、３は担体分
離装置である。図示の担体分離装置３は例えばウエッジ
ワイヤスクリーンと呼ばれる断面がくさび型のバーを一
定間隔で平面状に並べたもので、流出水路４の手前の水
中に垂直に近い角度で設置されている。FIG. 3 is a view showing a conventional typical carrier separation apparatus, wherein 1 is a treatment tank having a depth of about 5 m in which biological treatment is performed, 2 is an air diffuser installed on the bottom thereof, 3 is It is a carrier separation device. The illustrated carrier separation device 3 is, for example, a wedge-wire screen in which wedge-shaped bars having a cross section are arranged in a plane at regular intervals, and is installed at an angle nearly perpendicular to the water before the outflow channel 4.
【０００４】図３の担体分離装置では、散気装置２によ
り槽内に生成された旋回流が担体分離装置３のスクリー
ン面に沿って流れることにより、上昇流速と気泡による
洗浄が行われる。しかしこの洗浄効果には限界があり、
通過流速（スクリーンの単位面積を単位時間内に通過す
る処理水流量）が増加すると、担体の他、汚泥や繊維質
等の夾雑物の目詰まりによる閉塞が避けられない。しか
もこの担体分離装置３は数ｍの深さに達しているので、
スクリーン面が閉塞した場合には槽上部よりブラシ等で
清掃することは困難である。また、担体分離装置３を水
中から引き上げればブラシ等で清掃することができる
が、その間に担体が流出してしまうために処理槽１の運
転を停止しなければならない。このように、従来の担体
分離装置３は閉塞した場合のメンテナンスが困難である
という問題があった。In the carrier separation device shown in FIG. 3, the swirling flow generated in the tank by the air diffuser 2 flows along the screen surface of the carrier separation device 3, so that the cleaning by the rising flow rate and bubbles is performed. However, there is a limit to this cleaning effect,
When the passing flow rate (the flow rate of treated water passing through the unit area of the screen in a unit time) increases, clogging due to clogging of impurities such as sludge and fiber in addition to the carrier is inevitable. Moreover, since the carrier separation device 3 has reached a depth of several meters,
When the screen surface is closed, it is difficult to clean the upper part of the tank with a brush or the like. Further, if the carrier separating device 3 is pulled out of the water, it can be cleaned with a brush or the like, but during that time the carrier flows out, so that the operation of the processing tank 1 must be stopped. Thus, the conventional carrier separation device 3 has a problem that it is difficult to perform maintenance when it is closed.
【０００５】このように、従来の担体分離装置３は閉塞
した場合の対応が容易ではないため、その最大通過流速
を６０ｍ／時未満として閉塞に至らないようにする必要
がある。従って、処理槽１の処理水流量が大きい場合に
は、非常に大型の担体分離装置３を設置しなければなら
なかった。[0005] As described above, since the conventional carrier separation device 3 cannot easily cope with blockage, it is necessary to set the maximum passage flow rate to less than 60 m / hour so as not to block. Therefore, when the flow rate of the treated water in the treatment tank 1 is large, a very large carrier separation device 3 has to be installed.
【０００６】[0006]
【発明が解決しようとする課題】本発明は上記した従来
の問題点を解決し、閉塞のおそれがなく、従って最大通
過流速を従来よりも大きく設定できる担体分離装置を提
供するためになされたものである。SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned conventional problems, and has been made to provide a carrier separation apparatus which does not cause blockage and can set the maximum passage flow rate higher than before. It is.
【０００７】[0007]
【課題を解決するための手段】上記の課題を解決するた
めになされた本発明は、外周面を担体分離用スクリーン
とした円筒状の回転ドラムスクリーンを、その一部を水
面上に露出させて処理槽の水面付近に設置するととも
に、処理槽の上部にこの露出部を洗浄する洗浄手段を設
けたことを特徴とするものである。なお、担体分離用ス
クリーンを格子状又はバー状としておくことが好まし
く、またスクリーンの目幅を、担体の最小径の１０〜９
０％としておくことが好ましい。SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention is directed to a cylindrical rotary drum screen having an outer peripheral surface having a carrier separating screen, a part of which is exposed above the water surface. A cleaning means is provided near the water surface of the processing tank and a cleaning means for cleaning the exposed portion is provided above the processing tank. In addition, it is preferable that the screen for carrier separation is formed in a lattice shape or a bar shape, and the mesh width of the screen is set to 10 to 9 which is the minimum diameter of the carrier.
Preferably, it is set to 0%.
【０００８】本発明の担体分離装置は、処理槽の水面付
近に回転ドラムスクリーンを設置したものであるから、
その水面上に露出した部分を常に洗浄手段により洗浄す
ることができる。このため閉塞が生じるおそれがなく、
最大通過流速を従来よりも大きく設定することができ
る。In the carrier separation device of the present invention, a rotating drum screen is installed near the water surface of the treatment tank.
The part exposed on the water surface can always be washed by the washing means. Because of this, there is no risk of blockage,
The maximum flow velocity can be set larger than before.
【０００９】[0009]
【発明の実施の形態】以下に本発明の好ましい実施の形
態を示す。図１は本発明の実施形態を示す断面図であ
り、図２はその平面図である。１は深さがそれぞれ数ｍ
〜１０ｍ程度の処理槽であって、その底面または中段に
設置された散気装置２から発生する気泡の浮上効果によ
り、矢印方向の旋回流が槽内部に形成されている。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention will be described below. FIG. 1 is a sectional view showing an embodiment of the present invention, and FIG. 2 is a plan view thereof. 1 is several meters in depth
A swirling flow in the direction of the arrow is formed inside the tank due to the floating effect of bubbles generated from the air diffuser 2 installed on the bottom surface or the middle stage of the processing tank of about 10 to 10 m.
【００１０】５はこの処理槽１内に投入されている微生
物保持用の多孔質の担体である。図１の処理槽１は散気
装置２を備えた曝気槽であり、担体５には硝化菌が担持
されている。しかし処理槽１が機械的攪拌装置を備えた
嫌気槽である場合には、担体５に脱窒菌を担持させる。
担体５としては直径が１〜５ｍｍ程度のポリエチレング
リコール、ポリビニルアルコール、ポリウレタン等から
なる多孔質樹脂が用いられることが多い。Reference numeral 5 denotes a porous carrier for holding microorganisms, which is charged in the processing tank 1. The treatment tank 1 shown in FIG. 1 is an aeration tank provided with an air diffuser 2, and a carrier 5 carries nitrifying bacteria. However, when the treatment tank 1 is an anaerobic tank provided with a mechanical stirring device, the carrier 5 carries denitrifying bacteria.
As the carrier 5, a porous resin made of polyethylene glycol, polyvinyl alcohol, polyurethane, or the like having a diameter of about 1 to 5 mm is often used.
【００１１】この処理槽１の水面付近の水中には、回転
ドラムスクリーン６が設けられている。この回転ドラム
スクリーン６は外周面を担体分離用スクリーンとした円
筒状のもので、回転軸７を水平として外周面の一部が水
面上に露出する高さに設置されている。この担体分離用
スクリーンは担体５が詰まりにくい格子状又はバー状で
あり、好ましくは従来から用いられたものと同様のウエ
ッジワイヤスクリーンが用いられる。このウエッジワイ
ヤスクリーンは、流入側すなわち外側の間隔（目幅）が
最も狭くなっているため、内部で目詰まりが発生しにく
い利点がある。担体分離用スクリーンの目幅は担体５の
最小径の１０〜９０％が好ましい。目幅がこれよりも狭
いと目詰まりによる閉塞を招き易く、目幅がこれよりも
広いと担体５がスクリーンを通過して流出してしまいや
すいので好ましくない。目幅の最も好ましい範囲は、担
体５の最小径の４０〜７０％である。具体的には、担体
５の最小径が３ｍｍである場合にはスクリーンの目幅を
２ｍｍ程度としておくことが好ましい。A rotary drum screen 6 is provided in the water near the water surface of the processing tank 1. The rotary drum screen 6 has a cylindrical shape whose outer peripheral surface is a screen for separating carriers, and is set at a height such that a part of the outer peripheral surface is exposed above the water surface with the rotating shaft 7 being horizontal. The carrier separating screen has a lattice shape or a bar shape in which the carrier 5 is hardly clogged. Preferably, a wedge wire screen similar to a conventionally used one is used. This wedge wire screen has the advantage that the clogging hardly occurs inside the wedge wire screen since the inflow side, that is, the outer space (the gap width) is the narrowest. The mesh width of the carrier separating screen is preferably 10 to 90% of the minimum diameter of the carrier 5. If the mesh width is smaller than this, blockage due to clogging is likely to occur, and if the mesh width is larger than this, the carrier 5 tends to flow out through the screen, which is not preferable. The most preferable range of the mesh width is 40 to 70% of the minimum diameter of the carrier 5. Specifically, when the minimum diameter of the carrier 5 is 3 mm, it is preferable to set the screen width to about 2 mm.
【００１２】回転ドラムスクリーン６の両端面は閉塞さ
れており、回転軸７をモータ８により駆動して毎分１回
転程度の低速で連続的又は間欠的に回転させる。しかし
回転は必ずしも機械的に行われる必要はなく、洗浄時に
人力により回転させることもできる。回転ドラムスクリ
ーン６で担体５を分離した処理水は、一方の回転軸７の
内部を通じて抜き取られる。Both end surfaces of the rotary drum screen 6 are closed, and the rotating shaft 7 is driven by a motor 8 to rotate continuously or intermittently at a low speed of about one revolution per minute. However, the rotation does not necessarily need to be performed mechanically, and can be performed manually during cleaning. The treated water from which the carrier 5 has been separated by the rotating drum screen 6 is withdrawn through the inside of one rotating shaft 7.
【００１３】処理槽１の上部には、回転ドラムスクリー
ン６の水面状に露出した部分を洗浄する洗浄手段９が設
けられている。洗浄手段９としては、例えば洗浄ノズル
やブラシが用いられる。洗浄ノズルを用いる場合、図に
示すように洗浄水は回転ドラムスクリーン６の円周の接
線方向から、回転方向と衝突するように当てることが好
ましい。なお、露出部が多くなると実質的なろ過面積が
低下するため、回転ドラムスクリーン６の全ろ過面積の
うち少なくとも１／２が水没するように設置しておくこ
とが好ましい。この回転ドラムスクリーン６の取付け位
置は固定してもよいが、水面高さに合わせて上下させた
り完全に水面上に引き上げることができるようにしてお
くことが好ましい。A cleaning means 9 for cleaning a portion of the rotary drum screen 6 exposed on the water surface is provided above the processing tank 1. As the cleaning unit 9, for example, a cleaning nozzle or a brush is used. When a cleaning nozzle is used, it is preferable to apply the cleaning water from the tangential direction of the circumference of the rotating drum screen 6 so as to collide with the rotating direction as shown in the figure. In addition, since the substantial filtration area decreases as the number of exposed portions increases, it is preferable that the rotary drum screen 6 is installed so that at least 1/2 of the total filtration area is submerged. The mounting position of the rotating drum screen 6 may be fixed, but it is preferable that the rotating drum screen 6 can be moved up and down in accordance with the water surface height or can be completely pulled up on the water surface.
【００１４】回転ドラムスクリーン６を機械的に回転さ
せる場合には、図１に示すように槽内の旋回流と逆方向
に回転ドラムスクリーン６を回転させ、旋回流の衝突に
よる洗浄効果が高まるようにしておくことが好ましい。When the rotating drum screen 6 is mechanically rotated, as shown in FIG. 1, the rotating drum screen 6 is rotated in a direction opposite to the swirling flow in the tank so that the washing effect by the collision of the swirling flow is enhanced. It is preferable to keep it.
【００１５】このように構成された本発明の担体分離装
置は、流出水路に向かって流れる処理水中の担体５をス
クリーンにより分離することは従来のものと同様であ
る。しかし本発明の担体分離装置は、回転ドラムスクリ
ーン６を用いてスクリーン面を洗浄手段９により常時洗
浄できるようにしたため、閉塞のおそれがない。このた
め、本発明の担体分離装置はその最大通過流速を従来の
６０ｍ／時よりもはるかに大きい７０〜４００ｍ／時に
まで高めることができ、スクリーンの面積も従来よりも
小さくすることができ、設備コストの削減が可能とな
る。In the carrier separating apparatus of the present invention thus configured, the carrier 5 in the treated water flowing toward the outflow channel is separated by a screen in the same manner as the conventional one. However, in the carrier separation device of the present invention, since the screen surface can be always washed by the washing means 9 using the rotating drum screen 6, there is no possibility of blockage. For this reason, the carrier separation device of the present invention can increase the maximum passage flow velocity to 70 to 400 m / h, which is much larger than the conventional 60 m / h, and the screen area can be made smaller than before. The cost can be reduced.
【００１６】[0016]
【発明の効果】以上に説明したように、本発明の担体分
離装置は目詰まりによる閉塞が生じるおそれがなく、最
大通過流速を従来よりも大きく設定できる利点がある。As described above, the carrier separation device of the present invention has the advantage that there is no possibility of clogging due to clogging and the maximum passage flow rate can be set larger than before.
【図１】本発明の担体分離装置を設置した槽の断面図で
ある。FIG. 1 is a sectional view of a tank provided with a carrier separation device of the present invention.
【図２】本発明の担体分離装置を設置した槽の平面図で
ある。FIG. 2 is a plan view of a tank provided with the carrier separation device of the present invention.
【図３】従来の担体分離装置を設置した槽の断面図であ
る。FIG. 3 is a sectional view of a tank provided with a conventional carrier separation device.
１ 処理槽、２ 散気装置、３ 従来の担体分離装置、
４ 流出水路、５ 担体、６ 回転ドラムスクリーン、
８ モータ、９ 洗浄手段1 treatment tank, 2 diffuser, 3 conventional carrier separation device,
4 effluent channels, 5 carriers, 6 rotating drum screens,
8 motor, 9 cleaning means
Claims (3)
筒状の回転ドラムスクリーンを、その一部を水面上に露
出させて処理槽の水面付近に設置するとともに、処理槽
の上部にこの露出部を洗浄する洗浄手段を設けたことを
特徴とする担体分離装置。1. A cylindrical rotary drum screen having an outer peripheral surface having a carrier separating screen, a part of which is exposed near the water surface and installed near the water surface of the processing tank. A carrier separating device provided with a washing means for washing the carrier.
状とした請求項１に記載の担体分離装置。2. The carrier separation device according to claim 1, wherein the carrier separation screen is formed in a lattice shape or a bar shape.
０〜９０％とした請求項１に記載の担体分離装置。3. The screen width of the screen is set to one of the minimum diameter of the carrier.
The carrier separation device according to claim 1, wherein the content is 0 to 90%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10059669A JPH11253711A (en) | 1998-03-11 | 1998-03-11 | Carrier separation apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10059669A JPH11253711A (en) | 1998-03-11 | 1998-03-11 | Carrier separation apparatus |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH11253711A true JPH11253711A (en) | 1999-09-21 |
Family
ID=13119841
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP10059669A Pending JPH11253711A (en) | 1998-03-11 | 1998-03-11 | Carrier separation apparatus |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH11253711A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005279432A (en) * | 2004-03-29 | 2005-10-13 | Kurita Water Ind Ltd | Float outflow prevention member and water treatment apparatus |
| JP2008284421A (en) * | 2007-05-15 | 2008-11-27 | Jfe Engineering Kk | Agitation reaction tank having rectangular shape |
| JP2010075837A (en) * | 2008-09-25 | 2010-04-08 | Japan Organo Co Ltd | Fluidized-bed biological treatment apparatus |
| JP2014124538A (en) * | 2012-12-25 | 2014-07-07 | Swing Corp | Solid-liquid separator, catchment hole formation method thereof and water treatment equipment |
-
1998
- 1998-03-11 JP JP10059669A patent/JPH11253711A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005279432A (en) * | 2004-03-29 | 2005-10-13 | Kurita Water Ind Ltd | Float outflow prevention member and water treatment apparatus |
| JP4582293B2 (en) * | 2004-03-29 | 2010-11-17 | 栗田工業株式会社 | Floating body outflow prevention member and water treatment device |
| JP2008284421A (en) * | 2007-05-15 | 2008-11-27 | Jfe Engineering Kk | Agitation reaction tank having rectangular shape |
| JP2010075837A (en) * | 2008-09-25 | 2010-04-08 | Japan Organo Co Ltd | Fluidized-bed biological treatment apparatus |
| JP2014124538A (en) * | 2012-12-25 | 2014-07-07 | Swing Corp | Solid-liquid separator, catchment hole formation method thereof and water treatment equipment |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US4626345A (en) | Apparatus for clarification of water | |
| US3713540A (en) | Apparatus for treating waste materials | |
| JP2007307549A (en) | Filtration device, and waste water treatment apparatus using this filtration device | |
| US3707230A (en) | Method and apparatus for ultrasonically clarifying liquid | |
| US5290458A (en) | Granular media regeneration process | |
| JP2002126800A (en) | Rotary disk type filtration device | |
| JPH11253711A (en) | Carrier separation apparatus | |
| KR100343198B1 (en) | Filtration method using drum filter | |
| JP3942307B2 (en) | Flow separator for carrier | |
| KR100479476B1 (en) | Apparatus for reusing waste water using drum filter and vortex filter | |
| KR920005952B1 (en) | Purifying apparatus for septic tank | |
| JPH11226317A (en) | Apparatus and method for rotary disc type solid and liquid separation | |
| JP3454737B2 (en) | Carrier separation device | |
| JP2000202497A (en) | Sludge filtration concentrator device | |
| JP2008142640A (en) | Sewage treatment apparatus | |
| JPH0985122A (en) | Solid-liquid separator | |
| JP3301299B2 (en) | Screen device for carrier separation | |
| JP2002018497A (en) | Sludge filtration and concentration apparatus | |
| CN211611874U (en) | Screening machine for sewage treatment | |
| KR20020033243A (en) | Device for contrary wash in filter bath | |
| JPH08252433A (en) | Polluted water treatment device | |
| JPH10272483A (en) | Sewage cleaning device | |
| JP2819386B2 (en) | Wastewater treatment system | |
| JP2002113498A (en) | Sludge filtering and concentrating method | |
| KR970001491Y1 (en) | Aerobic waste water treatment tank |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A621 | Written request for application examination |
Free format text: JAPANESE INTERMEDIATE CODE: A621 Effective date: 20050308 |
|
| A977 | Report on retrieval |
Free format text: JAPANESE INTERMEDIATE CODE: A971007 Effective date: 20060222 |
|
| A131 | Notification of reasons for refusal |
Free format text: JAPANESE INTERMEDIATE CODE: A131 Effective date: 20060228 |
|
| A02 | Decision of refusal |
Free format text: JAPANESE INTERMEDIATE CODE: A02 Effective date: 20060623 |