JPH02290298A - Automatic control method for batch-type active sludge treatment apparatus - Google Patents
Automatic control method for batch-type active sludge treatment apparatusInfo
- Publication number
- JPH02290298A JPH02290298A JP1110282A JP11028289A JPH02290298A JP H02290298 A JPH02290298 A JP H02290298A JP 1110282 A JP1110282 A JP 1110282A JP 11028289 A JP11028289 A JP 11028289A JP H02290298 A JPH02290298 A JP H02290298A
- Authority
- JP
- Japan
- Prior art keywords
- raw water
- sludge
- tank
- amount
- detected
- 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
- 239000010802 sludge Substances 0.000 title claims abstract description 50
- 238000000034 method Methods 0.000 title claims abstract description 17
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 45
- 238000005273 aeration Methods 0.000 claims abstract description 17
- 238000004062 sedimentation Methods 0.000 claims description 9
- 239000006228 supernatant Substances 0.000 claims description 4
- 238000001556 precipitation Methods 0.000 abstract description 4
- 238000006243 chemical reaction Methods 0.000 description 4
- 238000013459 approach Methods 0.000 description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
- 238000000605 extraction Methods 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000010842 industrial wastewater Substances 0.000 description 1
- 239000005416 organic matter Substances 0.000 description 1
- 239000010865 sewage Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000002351 wastewater 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
Abstract
Description
【発明の詳細な説明】
（産業上の利用分野）
本発明は産業廃水や下水等の生物処理を行なう回分式活
性汚泥処理装置の自動制御に関する。DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to automatic control of a batch type activated sludge treatment apparatus that performs biological treatment of industrial wastewater, sewage, etc.
（従来の技術）
有機物を含む廃水を処理する方法として生物処理法が広
く用いられており、その中で特に回分式活性汚泥処理法
は近年、脚光をあびている．第２図は従来の回分式活性
汚泥処理法で用いられた装置を概略的に示すものであっ
て，従来の装置は原水を１次的に受け入れる原水槽（１
）、曝気沈澱槽（２），汚泥貯槽（３），原水ポンプ（
４），ブロア（５）、放流ポンプ（６），汚泥引抜ポン
プ（７），該ブロアに連通する敗気管（８）、放流レベ
ルを感知するレベルスイッチ（９）から構成された．そ
の処理法では原水ポンプ（４）により原水槽（１）内の
原水を曝気沈澱槽（２）に導入すると共にブロア（５）
より散気管（８）を通して空気を曝気沈澱槽（２）内に
供給し、一定時間にわたり生物処理を行なう．次いで原
水ポンプ（４）とブロア（５）を一定時間停止して汚泥
を沈降させた後，放流ポンプ（６）により上澄水をレベ
ルスイッチ（９）で検出される放流レベルまで排出する
．上澄水の放流が終ると，原水ポンプ（４）およびブロ
ア（５）を再び運転し，上記プロセスを繰り返す．そし
て余剰汚泥が生じると汚泥引抜ポンプ（７）により所定
量の汚泥を汚泥貯槽（３）へ引抜くようになっている。(Prior Art) Biological treatment methods are widely used to treat wastewater containing organic matter, and among these, the batch activated sludge treatment method has been in the spotlight in recent years. Figure 2 schematically shows the equipment used in the conventional batch activated sludge treatment method.
), aeration settling tank (2), sludge storage tank (3), raw water pump (
4), a blower (5), a discharge pump (6), a sludge extraction pump (7), a septic pipe (8) communicating with the blower, and a level switch (9) that senses the discharge level. In this treatment method, the raw water in the raw water tank (1) is introduced into the aeration and sedimentation tank (2) using the raw water pump (4), and the blower (5)
Air is supplied into the aeration sedimentation tank (2) through the aeration pipe (8), and biological treatment is performed for a certain period of time. Next, the raw water pump (4) and blower (5) are stopped for a certain period of time to allow the sludge to settle, and then the discharge pump (6) discharges the supernatant water to the discharge level detected by the level switch (9). Once the supernatant water has been discharged, the raw water pump (4) and blower (5) are operated again and the above process is repeated. When excess sludge is generated, a predetermined amount of sludge is drawn out to a sludge storage tank (3) by a sludge drawing pump (7).
（発明がＭ決しようとする課題）
従って従来技術では原水の水質等をファクタとして空気
量を変化するものではなく，そのため原水の水質変化や
原水導入量および汚泥量が変動すると，過曝気または空
気量の不足が生じ、処理状況が悪化することがあった。(Problem to be solved by the invention) Therefore, in the prior art, the amount of air is not changed based on the quality of raw water, etc. Therefore, if the quality of raw water changes, the amount of raw water introduced, or the amount of sludge changes, over-aeration or air There were times when there was a shortage of quantity and the processing situation worsened.
さらに汚泥量が増加して汚泥ゾーンが上昇し、または汚
泥のバルキングが起こると、汚泥が充分に沈降しないう
ちに放流ボンブにより上澄水が放流されることもあり，
その場合、汚泥が処理水内に混入する等の問題点があっ
た．
本発明の目的は上記問題点を解消することであって、そ
れ故，曝気沈澱槽内に供給される空気量を制御して過曝
気や空気量の不足を防ぎ，適切な処理を可能にし、且つ
処理水中に汚泥が混入することがないようにした回分式
活性汚泥処理装置の自動制御法を提供することである。Furthermore, if the amount of sludge increases and the sludge zone rises or sludge bulking occurs, supernatant water may be discharged by the discharge bomb before the sludge has settled sufficiently.
In that case, there were problems such as sludge getting mixed into the treated water. The purpose of the present invention is to solve the above problems, and therefore, to control the amount of air supplied into the aeration and precipitation tank to prevent overaeration and insufficient air amount, and to enable appropriate treatment. Another object of the present invention is to provide an automatic control method for a batch type activated sludge treatment apparatus that prevents sludge from being mixed into treated water.
（課題を解決するための手段）
本発明による回分式活性汚泥処理装置の自動制御法の特
徴は曝気沈澱槽に導入された原水量、原水の水質および
汚泥量の変動の３つのファクタをセンサーにより検出し
、それらのファクタにより曝気沈澱槽内に供給される空
気量を制御すると共に、汚泥ゾーンの変動により放流ポ
ンプの制御を行なうことである。(Means for Solving the Problems) The feature of the automatic control method of the batch type activated sludge treatment equipment according to the present invention is that the three factors of the amount of raw water introduced into the aeration sedimentation tank, the quality of the raw water, and the variation in the amount of sludge are detected by sensors. These factors are used to control the amount of air supplied into the aeration and sedimentation tank, and the discharge pump is controlled based on the fluctuations in the sludge zone.
（作用）
この自動制御法＋ｅよれば原水の水質として例えばＢＯ
Ｄ値を用い、その値が増大しまたは原水の導入量もしく
は汚Ｆｆｆｋが増加すると導入空気量を増加し、逆にそ
れらが減少すると導入空気量を少なくする。そのため過
曝気または空気量不足を防ぐことができる。また、汚泥
量の増加によりｌη泥ゾーンが上昇して放流レベルに近
づくと放流ポンプを自動的に停止し、処理水に汚泥が混
入するのを防ぐようになっている。(Function) According to this automatic control method +e, the quality of raw water is, for example, BO
Using the D value, if the value increases or the amount of raw water introduced or the dirt Fffk increases, the amount of air introduced is increased, and conversely, if these decrease, the amount of air introduced is decreased. Therefore, overaeration or insufficient air volume can be prevented. Furthermore, when the lη mud zone rises due to an increase in the amount of sludge and approaches the discharge level, the discharge pump is automatically stopped to prevent sludge from being mixed into the treated water.
（実施例）
第１図は本発明方法の実施に用いられる回分式活性汚泥
処理装置の一例を示すものであって、図示のようにこの
装置も従来と同様に、原水槽（１）、曝気沈澱槽（２）
，汚泥貯槽（３）．／ｍ水ボンプ（４）、ブロア（５）
、放流ポンプ（６）、汚泥引抜ポンプ（７）、散気管（
８），レベルスイッチ（９）を備えている．さらに、こ
の装置では曝気沈澱槽（２）内に導入された原水の水量
を検出するための装置，例えば図示のように通常は３〜
４のレベルスイッチからなる数段のレベルスイッチ（１
０）と、汚泥量もしくは汚泥ゾーンを把握する装置，例
えば静電、振動等の数個のレベル計（ｌ１）およびＣＯ
Ｄ（化学的酸素要求量）の自動測定器等、原水の水質を
把握するための分析計（工２）を含む。(Example) Fig. 1 shows an example of a batch type activated sludge treatment equipment used to carry out the method of the present invention.As shown in the figure, this equipment also has a raw water tank (1), an aeration tank, Sedimentation tank (2)
, Sludge storage tank (3). /m water pump (4), blower (5)
, discharge pump (6), sludge extraction pump (7), aeration pipe (
8) and a level switch (9). Furthermore, this device is equipped with a device for detecting the amount of raw water introduced into the aeration sedimentation tank (2), for example, as shown in the diagram,
Several level switches consisting of 4 level switches (1
0), devices for determining the sludge volume or sludge zone, such as electrostatic, vibration, etc., several level meters (l1) and CO
Includes an analyzer (Engine 2) to understand the quality of raw water, such as an automatic measuring device for D (chemical oxygen demand).
従って、本発明による自動制御法ではレベルスイッチ（
９）により処理水の放流時点を感知するほか、原水の導
入された量を時間のファクタによりレベルスイッチ（１
０）によって各段ごとに感知し、原水導入量を把握する
。また、数個のレベル計（ｌｌ）により曝気沈澱槽（２
）内の沈降汚泥量が沈降時間帯により検出される。そし
て、原水の水質に関しては，この実施例ではＣＯＤ値を
測定し、その値からＢＯＤ（生化学的酸素要求量）値へ
の換算を行ない、ＢＯＤ値を把握する。なお、ＢＯＤ値
の検出は上記のようにＣＯＤ値からの換算に依らなくて
も、簡易な方法で定期的に甜定してもよいことは云うま
でもない。Therefore, in the automatic control method according to the present invention, the level switch (
In addition to sensing the point at which treated water is discharged using the level switch (1), the amount of raw water introduced is determined by the time factor.
0) at each stage to understand the amount of raw water introduced. In addition, several level meters (ll) were used to measure the aeration and sedimentation tank (2).
) The amount of settled sludge within ) is detected depending on the settling time period. Regarding the quality of raw water, in this embodiment, the COD value is measured, and the value is converted into a BOD (biochemical oxygen demand) value to determine the BOD value. It goes without saying that the detection of the BOD value does not have to depend on conversion from the COD value as described above, and may be determined periodically using a simple method.
これらのデータ、即ち、原水の導入量（Ｑ）、汚泥量（
１１）および原水の水質としてのＢＯＤ値（口）を、供
給すべき空気ｆｆｉ （Ａ）の換算式Ａ＝ｆ（Ｑ，Ｈ，
Ｂ）に基づいてシーケンサーなどにセットし、該３つの
ファクタにより，ブロア（５）の稼動時間，間欠運転お
よびブロア（５）の運転台数等を制御し，曝気沈澱槽内
の状況に合った適当な空気量（Ａ）を供給できるように
している。この換算式の一例では Ａ＝（０．５ＸＢ十
０．０５３ＸＭＬＳＳ値ＸＱ）／５．５４となる。上記
の式では汚泥量としてＭＬＳＳ値，即ち槽中の汚泥濃度
が用いられている。なお、換算式はこれに限定されるも
のではなく，他の式を用いてもよいことは明らかである
．
その上，汚泥ゾーンの上昇またはバルキング時にはレベ
ル計（１１）によってそのことを感知し、汚泥ゾーンが
放流レベルに近づいた場合（例えば、放流レベルの３０
〜５０ｃｍに近づいた場合）、放流ポンプ（６）を停止
する。そして汚泥ゾーンが放流レベルから或る程度下っ
た時点で、再び放流ポンプ（６）を作動する。また，レ
ベル計（１１）により汚泥ゾーンの上昇を感知すると、
汚泥引抜ポンプ（７）を作動して自動的に汚泥の引抜き
を行なうこともできる。These data include the amount of raw water introduced (Q), the amount of sludge (
11) and the BOD value (mouth) as the water quality of raw water, the conversion formula for the air ffi (A) to be supplied is A = f (Q, H,
B) is set in a sequencer, etc., and the operating time of the blower (5), intermittent operation, number of blowers (5), etc. This makes it possible to supply a sufficient amount of air (A). An example of this conversion formula is A=(0.5XB+0.053XMLSS value XQ)/5.54. In the above formula, the MLSS value, that is, the sludge concentration in the tank is used as the sludge amount. Note that the conversion formula is not limited to this, and it is clear that other formulas may be used. Moreover, when the sludge zone rises or bulks, it is sensed by the level meter (11), and if the sludge zone approaches the discharge level (e.g.
~50 cm), stop the discharge pump (6). Then, when the sludge zone drops to a certain extent from the discharge level, the discharge pump (6) is operated again. In addition, when a rise in the sludge zone is detected by the level meter (11),
It is also possible to automatically draw out sludge by operating the sludge drawing pump (7).
なお．休日等において原水導入量が少ないか、または殆
どない場合にも、原水の導入量等を把握し，ブロア（５
）の運転時間、運転台数および間欠運転等の制御を行な
い得ることは明らかである。In addition. Even when the amount of raw water introduced is small or almost non-existent, such as on holidays, the amount of raw water introduced, etc. can be ascertained, and the blower (5
), it is clear that it is possible to control the operating time, number of operating units, intermittent operation, etc.
（発明の効果）
上記のように，本発明によれば，１＠気沈８槽内の状況
に応じて該槽内に供給される空気量が制御されるので、
過曝気または空気量不足になる事態を避けることができ
，生物処理を好適に行なうことができる。その上、汚泥
量が増加したリバルキングが生じた場合には放流ポンプ
を自動的に停止するので、処理水中に汚泥が混入するこ
とも防止することができる。(Effects of the Invention) As described above, according to the present invention, the amount of air supplied to the 1@8 pneumatic tank is controlled according to the situation in the tank.
Situations such as overaeration or insufficient air volume can be avoided, and biological treatment can be carried out suitably. Furthermore, since the discharge pump is automatically stopped when rebulking occurs in which the amount of sludge increases, it is also possible to prevent sludge from getting mixed into the treated water.
第１図は本発明方法の実施に用いられる回分式活性汚泥
処理装置のフローシ一ト図、第２図は従来用いられてき
た回分式活性汚泥処理装置のフローシ一ト図である。
図中，２：曝気沈澱槽，５：ブロア、６：．放流ポンプ
、１０：レベルスイッチ，１１二レベル計，１２：分析
計FIG. 1 is a flowchart of a batch-type activated sludge treatment apparatus used to carry out the method of the present invention, and FIG. 2 is a flowchart of a conventional batch-type activated sludge treatment apparatus. In the figure, 2: aeration settling tank, 5: blower, 6:. Discharge pump, 10: Level switch, 11 Two-level meter, 12: Analyzer
Claims (1)
気を供給するブロアおよび該槽内の上澄水を排出する放
流ポンプを含む回分式活性汚泥処理装置の運転方法にお
いて、曝気沈澱槽内の原水の導入量と該槽内の汚泥量の
変動および原水の水質の３つをファクタとして前記ブロ
アによって曝気沈澱槽内に供給される空気量を自動的に
制御し、さらに汚泥量の変動により放流ポンプの制御を
行なうことを特徴とする回分式活性汚泥処理装置の自動
制御法。In a method for operating a batch type activated sludge treatment equipment that includes an aeration sedimentation tank that receives and aerates raw water, a blower that supplies air into the tank, and a discharge pump that discharges supernatant water from the tank, The amount of air supplied to the aeration and sedimentation tank by the blower is automatically controlled based on the following three factors: the amount of raw water introduced, fluctuations in the amount of sludge in the tank, and the quality of the raw water. An automatic control method for a batch type activated sludge treatment equipment characterized by controlling a pump.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1110282A JPH02290298A (en) | 1989-04-28 | 1989-04-28 | Automatic control method for batch-type active sludge treatment apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1110282A JPH02290298A (en) | 1989-04-28 | 1989-04-28 | Automatic control method for batch-type active sludge treatment apparatus |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH02290298A true JPH02290298A (en) | 1990-11-30 |
Family
ID=14531739
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1110282A Pending JPH02290298A (en) | 1989-04-28 | 1989-04-28 | Automatic control method for batch-type active sludge treatment apparatus |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH02290298A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001300496A (en) * | 2000-04-27 | 2001-10-30 | Fuji Electric Co Ltd | Method for dry distillation of resin molded part |
| KR100423813B1 (en) * | 2001-06-13 | 2004-03-30 | 대명엔텍(주) | Biological wastewater disposal plant |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6313299B2 (en) * | 1979-05-29 | 1988-03-24 | Mitsubishi Electric Corp |
-
1989
- 1989-04-28 JP JP1110282A patent/JPH02290298A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6313299B2 (en) * | 1979-05-29 | 1988-03-24 | Mitsubishi Electric Corp |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001300496A (en) * | 2000-04-27 | 2001-10-30 | Fuji Electric Co Ltd | Method for dry distillation of resin molded part |
| KR100423813B1 (en) * | 2001-06-13 | 2004-03-30 | 대명엔텍(주) | Biological wastewater disposal plant |
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