JPS63229195A - Method for controlling batch type drainage processing equipment - Google Patents
Method for controlling batch type drainage processing equipmentInfo
- Publication number
- JPS63229195A JPS63229195A JP62062833A JP6283387A JPS63229195A JP S63229195 A JPS63229195 A JP S63229195A JP 62062833 A JP62062833 A JP 62062833A JP 6283387 A JP6283387 A JP 6283387A JP S63229195 A JPS63229195 A JP S63229195A
- Authority
- JP
- Japan
- Prior art keywords
- sludge
- time
- treatment tank
- interface
- sensor
- 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
- 238000000034 method Methods 0.000 title claims description 16
- 239000010802 sludge Substances 0.000 claims abstract description 56
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 34
- 239000006228 supernatant Substances 0.000 claims abstract description 14
- 238000005273 aeration Methods 0.000 claims abstract description 10
- 238000004065 wastewater treatment Methods 0.000 claims description 8
- 239000002351 wastewater Substances 0.000 claims description 4
- 238000001514 detection method Methods 0.000 claims description 3
- 230000015572 biosynthetic process Effects 0.000 claims 1
- 238000013019 agitation Methods 0.000 abstract 1
- 238000000605 extraction Methods 0.000 description 5
- 238000004062 sedimentation Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 238000003756 stirring Methods 0.000 description 2
- 230000002542 deteriorative effect Effects 0.000 description 1
- 230000035622 drinking Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000010865 sewage Substances 0.000 description 1
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
- Activated Sludge Processes (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は回分式活性汚泥を用いた排水処理装置に係り、
安定した高い処理機能を保持する制御方法に間するもの
である。[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a wastewater treatment device using batch-type activated sludge,
This is a control method that maintains stable and high processing performance.
近年連続式の活性汚泥法に比較して、維持管理が容易で
小規模の排水処理に適した回分式活性汚泥法、たとえば
、特開昭５５−１５２５９４号公報のものがよく知られ
ている。In recent years, a batch-type activated sludge method, such as that disclosed in Japanese Patent Application Laid-Open No. 152594/1984, has become well known, as it is easier to maintain and manage and is suitable for small-scale wastewater treatment than the continuous activated sludge method.
この方法は単一の処理槽に於て、流入・曝気・沈澱番放
流の各工程を１サイクルとして繰り返し運転する処理方
法であるが、安定した高い処理性能を保持するためには
適切な汚泥の引抜き制御を行なう必要がある。This method is a treatment method in which each process of inflow, aeration, and sedimentation and discharge is repeatedly operated as one cycle in a single treatment tank, but in order to maintain stable and high treatment performance, appropriate sludge It is necessary to perform withdrawal control.
従来の回分式排水処理装置では、時間を決めて１日１回
、またはｌサイクル毎に汚泥の引抜きが行なわれている
が、特に負荷変動が大きい場合には槽内のＭＬＳＳ１Ｊ
１１度が大きく変動して処理性能や汚泥の沈降性が悪化
して放流時に上澄水に汚泥を巻込んでしまう等の問題が
生じやすい。In conventional batch-type wastewater treatment equipment, sludge is extracted once a day or every 1 cycle at a fixed time.
The temperature of 11 degrees fluctuates greatly, deteriorating treatment performance and sludge settling properties, which tends to cause problems such as sludge being mixed into supernatant water during discharge.
また汚泥濃度を検出して引抜き汚水量を制御することも
考えられているが、汚泥量を一定に保つことは実際にか
なり難しく、複雑な制御装置を必要とするため実際的で
ない。It has also been considered to control the amount of sewage extracted by detecting the sludge concentration, but it is actually quite difficult to maintain a constant amount of sludge and requires a complicated control device, which is impractical.
放流後の低水位の近傍に汚泥界面の検出装置を設置し、
界面が沈降する時間と予め設定する時間を比較して、沈
降する時間が予め設定する時間より長い場合、汚泥の引
抜きを行なうもので、簡易な制御方法で汚泥濃度と汚泥
界面を適切な状態に管理することが可能である。A sludge interface detection device is installed near the low water level after discharge.
The time taken for the interface to settle is compared with the preset time, and if the settling time is longer than the preset time, the sludge is pulled out, and a simple control method is used to maintain the sludge concentration and sludge interface in an appropriate state. It is possible to manage.
〔実施例〕 以下本発明の実施例を図面にもとづき説明する。〔Example〕 Embodiments of the present invention will be described below based on the drawings.
第１図は本発明の回分式排水処理装置を示したもので、
ｌは排水を貯水した原水槽で、原水ポンプ３により処理
槽２に流入させる。処理槽２の排水面にはフロート４上
にｖ４気装置５を設け、この曝気装置５で空気を排水内
部に吹き込み、攪拌羽根で必要な攪拌を行なう。Figure 1 shows the batch-type wastewater treatment equipment of the present invention.
1 is a raw water tank in which wastewater is stored, and the raw water is made to flow into the treatment tank 2 by a raw water pump 3. A V4 aeration device 5 is provided on a float 4 on the drainage surface of the treatment tank 2, and the aeration device 5 blows air into the wastewater, and a stirring blade performs necessary stirring.
フロート４には上澄水引抜管７を設けて、上澄水を引抜
くと共にアーム６を設けて、水位に追従して揺動するよ
うになす。これらの曝気を、一般的なブロアーと散気管
で行なうことも可能である。The float 4 is provided with a supernatant water drawing pipe 7 to draw out the supernatant water, and is also provided with an arm 6 to swing following the water level. It is also possible to perform this aeration using a general blower and a diffuser pipe.
次に処理槽２の放流後の低水位近傍、っまりＬＷＬ位置
に汚泥界面計１０のセンサー９を設ける。制ｍ’ｉ装置
１１はタイマーを内蔵しており、汚泥界面計他、計酒器
からの信号を入力しながら、処理槽２の下部に設けた汚
泥引抜きポンプ８をＯＮ、ＯＦＦする以外に原水の流入
から、処理水放流までの間の運転スケジュールのずへて
を一括して制御する。Next, the sensor 9 of the sludge interface meter 10 is installed near the low water level after discharge from the treatment tank 2, at the LWL position. The control m'i device 11 has a built-in timer, and while inputting signals from the sludge interface meter and other drinking meters, it can control the raw water in addition to turning on and off the sludge drawing pump 8 installed at the bottom of the treatment tank 2. The operation schedule from the inflow of water to the discharge of treated water is controlled all at once.
第２図は、本発明における運転スケジュールの例を示し
たもので、原水を流入した後、連続曝χまたは間欠曝気
を行なって生物処理を行なった後、汚泥を沈降させる。FIG. 2 shows an example of the operation schedule according to the present invention, in which raw water is introduced, biological treatment is performed by continuous aeration or intermittent aeration, and then sludge is settled.
この時、制御装置に内蔵したタイマーが作動し、沈澱開
始後、汚泥界面がセンサ一部まで低下するのに要した時
間ｔを測定する。At this time, a timer built into the control device is activated to measure the time t required for the sludge interface to drop to a part of the sensor after the start of sedimentation.
ここで
（１）所定の沈澱時間１０内に界面がセンサ一部まで低
下しない場合（ｔ≧ｔＯ）、制御装置から緊急時の汚泥
引抜き指令が出力され、汚泥引抜きポンプが設定時間Ｔ
１だけ運転されて汚泥が引抜かれる。Here, (1) If the interface does not drop to a part of the sensor within the predetermined settling time 10 (t≧tO), an emergency sludge extraction command is output from the control device, and the sludge extraction pump is activated for the set time T.
1 is operated and the sludge is pulled out.
（２）汚泥界面の低下時間ｔが設定時間ｔｌより長い場
合（ｔ≧ｔｌ）、この設定時間ＴＩは後述するＭＬＳＳ
濃度と汚泥界面の沈降時間との関係から設定したもので
ある。(2) If the sludge interface lowering time t is longer than the set time tl (t≧tl), this set time TI is
It was set based on the relationship between concentration and settling time at the sludge interface.
汚泥引き抜きポンプが所定時間Ｔ２だけ運転されて汚泥
が引抜かれる。ただし、引抜き時間はＴ２≦ＴＩである
。The sludge drawing pump is operated for a predetermined time T2 to draw out the sludge. However, the drawing time is T2≦TI.
（３）汚泥界面の低下時間ｔが所定の沈澱時間１０及び
設定時間Ｌ１より短い場合（１＜ｔＯｌｔ＜ｔｌ）汚泥
引抜きを行なわない。(3) If the time t for lowering the sludge interface is shorter than the predetermined settling time 10 and the set time L1 (1<tOlt<tl), sludge extraction is not performed.
尚、汚泥の引抜きを行なう場合、（１）に示した緊急時
の引抜きは、上澄水の放流工程に先立って行なうことが
好ましいが、通常の引抜きは放流工程中であっても、放
流工程終了後であってもよい。When extracting sludge, it is preferable to carry out the emergency extraction described in (1) before the supernatant water discharge process. It may be later.
放流工程では、フロートに固定した上澄水の取水口から
上澄水引抜き管を介して上澄水が排出されるが、本発明
の方法によれば、放流開始時には汚泥界面はすでに低水
位（ＬＷＬ）以下に達しているため、上澄水と共に汚泥
を巻込む心配はない。In the discharge process, supernatant water is discharged from the supernatant water intake fixed to the float via a supernatant water withdrawal pipe, but according to the method of the present invention, the sludge interface is already below the low water level (LWL) when the discharge starts. , so there is no need to worry about sludge being mixed in with the supernatant water.
また第３図は汚泥の浮遊物（ＭＬＳＳ）濃度と汚泥界面
がｌＩＩ沈降するのに要する時間の関係を示したもので
、この図を用いることにより汚泥界面の沈降速度を測定
し、間接的にＭＬＳＳｔＪ度の管理を行なうことができ
る。すなわち、処理槽内のＭＬＳＳ濃度をある濃度ＣＯ
以下に保持するためには、第３図よりＣＯに対応する汚
泥界面の沈降時間ｔｌｏを求め、高水位（ＨＷＬ）から
汚泥界面計のセンサ一部までの深さｈｍを乗じたｔ ｔ
ｏｘ ｈを先述した設定時間ｔ１として制御を行なえば
よい。In addition, Figure 3 shows the relationship between the sludge suspended solids (MLSS) concentration and the time required for the sludge interface to settle.By using this diagram, the sedimentation rate at the sludge interface can be measured, and indirectly It is possible to manage the MLSStJ degree. In other words, the MLSS concentration in the treatment tank is set to a certain concentration CO
In order to maintain the following value, calculate the settling time tlo of the sludge interface corresponding to CO from Figure 3, and multiply it by the depth hm from the high water level (HWL) to a part of the sensor of the sludge interface meter.
Control may be performed by setting ox h to the previously mentioned set time t1.
なお第３図に示したＭＬＳＳ濃度と汚泥界面の沈降時間
との関係は、排水の種類や処理条件により幾分変化する
ため、本方法の採用にあたっては、実験その他の方法に
よって求めておく必要がある。Note that the relationship between MLSS concentration and settling time at the sludge interface shown in Figure 3 varies somewhat depending on the type of wastewater and treatment conditions, so it is necessary to determine it through experiments or other methods when adopting this method. be.
本発明は回分式排水処理装置に於て、放流後の低水位近
情に汚泥界面検出装置のセンサーを設け、沈澱開始後汚
泥界面がセンサ一部まで低下するまでの時間を測定し、
この時間が予め設定する時間より長い場合、汚泥の引抜
きを行なうように制御する方法で処理槽内の汚泥界面と
汚泥濃度を適切な状態に管理できるため、安定した高い
処理機能を保持できる効果を有する。The present invention provides a batch type wastewater treatment device, in which a sensor of a sludge interface detection device is installed near a low water level after discharge, and the time required for the sludge interface to drop to a part of the sensor after the start of sedimentation is measured,
If this time is longer than the preset time, the sludge interface and sludge concentration in the treatment tank can be controlled to an appropriate state by controlling the sludge to be pulled out, resulting in the effect of maintaining stable and high treatment performance. have
第１図は本発明の装置図、第２図は本発明の運転スケジ
ュール、第３図は汚泥の浮遊物（ＭＬＳＳ）濃度と汚泥
界面が１慣沈降するのに要する時間との関係を示したグ
ラフである。
ｌは原水槽、２は処理槽、３は原水ポンプ、４はフロー
ト、５は曝気装置、６はアーム、７は上澄水引抜き管、
８は汚泥引抜きポンプ、９はセンサー、１０は界面計、
１１は制ｉ＃装置。Figure 1 shows the equipment diagram of the present invention, Figure 2 shows the operation schedule of the present invention, and Figure 3 shows the relationship between the sludge suspended solids (MLSS) concentration and the time required for the sludge interface to settle once. It is a graph. 1 is the raw water tank, 2 is the treatment tank, 3 is the raw water pump, 4 is the float, 5 is the aeration device, 6 is the arm, 7 is the supernatant water withdrawal pipe,
8 is a sludge extraction pump, 9 is a sensor, 10 is an interface meter,
11 is a control i# device.
Claims (3)
沈澱し上澄水を放流する回分式排水 処理装置に於て、上澄水の放流後の低水位 近傍に汚泥界面検出装置のセンサーを設け、このセンサ
ーにより沈澱を開始してから所 定水位に汚泥界面が形成されるまでの時間 を測定し、この時間が、予め設定する時間 より長い場合、汚泥の引抜きを行なうこと を特徴とする回分式排水処理装置の制御方 法。(1) In a batch type wastewater treatment equipment that flows wastewater into a treatment tank, undergoes aeration treatment, settles sludge, and discharges supernatant water, the sensor of the sludge interface detection device is located near the low water level after supernatant water is discharged. A sensor is provided to measure the time from the start of settling to the formation of a sludge interface at a predetermined water level, and if this time is longer than a preset time, the sludge is pulled out. Control method for batch type wastewater treatment equipment.
ことを特徴とする特許請求範囲第１ 項記載の回分式排水処理装置の制御方法。(2) The method for controlling a batch-type wastewater treatment apparatus according to claim 1, wherein the preset time is a settling time of sludge.
面の沈降時間の関係から設定するこ とを特徴とする特許請求範囲第１項記載の 回分式処理装置制御方法。(3) The method for controlling a batch treatment apparatus according to claim 1, wherein the preset time is set based on the relationship between the MLSS concentration and the settling time of the sludge interface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62062833A JPH0651195B2 (en) | 1987-03-18 | 1987-03-18 | Control method for batch type waste water treatment equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62062833A JPH0651195B2 (en) | 1987-03-18 | 1987-03-18 | Control method for batch type waste water treatment equipment |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS63229195A true JPS63229195A (en) | 1988-09-26 |
| JPH0651195B2 JPH0651195B2 (en) | 1994-07-06 |
Family
ID=13211713
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP62062833A Expired - Lifetime JPH0651195B2 (en) | 1987-03-18 | 1987-03-18 | Control method for batch type waste water treatment equipment |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0651195B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002102606A (en) * | 2000-10-02 | 2002-04-09 | Nishihara Environ Sanit Res Corp | Water treatment device |
-
1987
- 1987-03-18 JP JP62062833A patent/JPH0651195B2/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002102606A (en) * | 2000-10-02 | 2002-04-09 | Nishihara Environ Sanit Res Corp | Water treatment device |
| JP4510261B2 (en) * | 2000-10-02 | 2010-07-21 | 株式会社西原環境テクノロジー | Batch water treatment system |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0651195B2 (en) | 1994-07-06 |
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