JPS62269799A - Control device for amount of return sludge - Google Patents
Control device for amount of return sludgeInfo
- Publication number
- JPS62269799A JPS62269799A JP61112184A JP11218486A JPS62269799A JP S62269799 A JPS62269799 A JP S62269799A JP 61112184 A JP61112184 A JP 61112184A JP 11218486 A JP11218486 A JP 11218486A JP S62269799 A JPS62269799 A JP S62269799A
- Authority
- JP
- Japan
- Prior art keywords
- return sludge
- sludge
- amount
- sewage
- value
- 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
- 239000010802 sludge Substances 0.000 title claims abstract description 68
- 239000010865 sewage Substances 0.000 claims abstract description 18
- 238000005273 aeration Methods 0.000 claims abstract description 13
- 238000004364 calculation method Methods 0.000 claims description 20
- 239000007787 solid Substances 0.000 claims description 5
- 239000000203 mixture Substances 0.000 abstract 2
- 238000000034 method Methods 0.000 description 12
- 230000000694 effects Effects 0.000 description 3
- 239000002351 wastewater Substances 0.000 description 3
- 238000009434 installation Methods 0.000 description 2
- 238000004062 sedimentation Methods 0.000 description 2
- 230000002411 adverse Effects 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000003203 everyday effect Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 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】
Ａ、産業上の利用分野
本発明は汚水処理Ｉｆｒｔに係り、特に汚水処理製電に
おける汚水量制御１装ｅｖｃｒＪＩＡするものである、
Ｂ６発明の概要
本発明け、汚水？＠気槽内に流入させて処理を行い、該
処理され念汚水を沈澱槽に導びいて処理する装＠ｊにお
いて、
制御目標値を自動的に演算し常に適正値に修正すること
により。DETAILED DESCRIPTION OF THE INVENTION A. Field of Industrial Application The present invention relates to sewage treatment ifrt, and in particular, to a sewage volume control unit evcrJIA in sewage treatment electrical manufacturing.
B6 Overview of the invention Is this invention sewage? By automatically calculating the control target value and constantly correcting it to an appropriate value in the system that processes wastewater by flowing it into the air tank and guiding the treated wastewater to the sedimentation tank.
高精度に返送汚泥ｆｉ？制御できる返送汚泥量制御装置
を得るものである。High precision return sludge fi? A device for controlling the amount of returned sludge that can be controlled is obtained.
Ｃ０従来の技術
下水や工場排水等？処理する活性汚泥処理プロセスにお
いて、最終沈澱池で固液分離された活性汚泥は返送汚泥
回路を経て曝気槽に返送ざ几る。C0 Conventional technology Sewage, factory wastewater, etc.? In the activated sludge treatment process, the activated sludge separated into solid and liquid in the final settling tank is returned to the aeration tank via the return sludge circuit.
この返送汚泥量の管理は、従来次のような方式がとらｎ
でいた。Conventionally, the following methods were used to manage the amount of returned sludge.
It was.
（１） 返送汚泥ｉを一定流量（例えば５００ｉ／ｈ
）で返送する定量返送方法。(1) Return sludge i at a constant flow rate (for example, 500 i/h
) Quantitative return method.
（２） 流入汚水ｔ （Ｑｓ： ｎ？／ ｈ ）の一
定比率（ｋ）で返送（ｋ ： Ｑｓ）する流水量制御方
式、（３）ＭＬＳＳ（混合浮遊物設定値）演算制御方式
、すなわち返送つ泥濃度（ＣＲ： ｍｇ／ ｆｌ ）
、流入汚水量（Ｑｓ： ｎ？／ ｈ ） 、流入ＳＳ濃
度（Ｃｐ： ｍｇ／ ＩＩ）。(2) A flow rate control method that returns (k: Qs) at a constant ratio (k) of inflow sewage t (Qs: n?/h), (3) MLSS (mixed suspended solids set value) calculation control method, that is, return Concentration (CR: mg/fl)
, inflow sewage volume (Qs: n?/h), inflow SS concentration (Cp: mg/II).
より返送汚泥ｔ （Ｑｎ ） ？演算し、この値になる
ように返送汚泥量を制御する方法。More return sludge t (Qn)? A method of calculating and controlling the amount of returned sludge to reach this value.
Ｄ６発明が解決しようとする問題点
前述のいず１０方式も制御装置に設定値を設定する必要
がある。定量返送の場合は、流量設定。D6 Problems to be Solved by the Invention All of the ten methods described above require setting values in the control device. For quantitative return, set the flow rate.
流入水比例制ｅｏｒｒ比率（ｋ ＞、ＭＬＳＳ一定制御
およびＭＬＳＳ演算制御の場合ｔｆＭＬｓｓ１１度がそ
ｎぞれ設定値となる。こ１らの設定値の設定は通常運転
員の経験により決定しているが、余剰汚泥量制御と相互
干渉することからその設定値が長期的には適正でなくな
るため、その都度設定値を修正する必要があった。In the case of inflow water proportional control eorr ratio (k >, MLSS constant control and MLSS calculation control, tfMLss11 degrees is the set value.The setting of these set values is usually determined by the experience of the operator. However, since the set value becomes inappropriate in the long term due to mutual interference with surplus sludge amount control, it was necessary to correct the set value each time.
Ｅ０問題点を解決するための手段
本発明は上述の問題点を解決したもので、曝気槽内に混
合浮遊物濃度計を設置し、この出力の時間移動平均値を
演算すると共に、ある−足時刻の定められた設定時間移
動平均値を返送汚泥量演算式の混合浮遊物設定値とし、
該演算された混合浮遊物設定値が目標値となるように制
御するものである。Means for Solving the E0 Problem The present invention solves the above-mentioned problems by installing a mixed suspended matter concentration meter in the aeration tank, calculating the time-moving average value of this output, and calculating the time-moving average value of this output. The set time moving average value with a fixed time is used as the mixed suspended solids set value of the return sludge amount calculation formula,
Control is performed so that the calculated mixed suspended matter set value becomes the target value.
したがって、返送汚泥目標値ｉ自動的に修正さｎて、余
剰汚泥制御と返送汚泥量制御が相互に干渉し合うことが
なく、高精度な返送汚泥量制御が行わｎる。Therefore, the return sludge target value i is automatically corrected, so that excess sludge control and return sludge amount control do not interfere with each other, and highly accurate return sludge amount control is performed.
Ｆ、実施例
以下に本発明を図面に示す実施例によって具体的に説明
する。F. EXAMPLES The present invention will be specifically explained below using examples shown in the drawings.
図面において］は曝気槽、２は最終沈澱池である。最終
沈澱池２に沈澱しｔ汚泥はポンプ３によって曝気槽１に
返送ざｎる。４ｆ１ＭＬＳＳ計（混合浮遊物濃度計）８
の計−ｊ値を入力とする第１の演算部で、ＭＬＳＳ値の
時間に対応する移動平均値を演算する。５は返送汚泥量
演算部で、第１の演算部４の移動平均値ＣＡと流入汚水
量検出器９の流入汚水ｆ Ｑａおよび返送汚泥置針１０
の返送汚泥量ＣＲ？入力としこｎらを演算する、６は返
送汚泥量演算式で、返送汚泥演算部５の演算出力値すｆ
ｋわち返送汚泥量設定値ＱＢｓｅｔと返送汚泥置針１１
の返送汚泥量ＣＲ？入力とし、ポンプ３を制御する。In the drawing] is an aeration tank, and 2 is a final settling tank. The sludge settled in the final settling tank 2 is returned to the aeration tank 1 by the pump 3. 4f1 MLSS meter (mixed suspended matter concentration meter) 8
A first calculation unit that receives the total -j value as input calculates a moving average value corresponding to time of the MLSS value. Reference numeral 5 denotes a return sludge amount calculation unit, which calculates the moving average value CA of the first calculation unit 4, the inflow sewage fQa of the inflow sewage amount detector 9, and the return sludge placement needle 10.
Returned sludge amount CR? 6 is a return sludge amount calculation formula that calculates the input and the return sludge amount, and the calculation output value f of the return sludge calculation unit 5
Return sludge amount set value QBset and return sludge placement needle 11
Returned sludge amount CR? It is used as an input to control the pump 3.
７は返送汚泥量の上下限を設定するリミッタである。7 is a limiter that sets the upper and lower limits of the amount of returned sludge.
上！！ｃｌ構収の制御装置において、曝気槽ｌ内で特に
その出口付近に設着したＭＬＳＳ計８からの出力（ＭＬ
ＳＳｉ）？、移動平均演算装Ｍ４に入力し、過去２４時
間の平均？ＭＬＳＳ値のサンプリング刻ミごとに演算す
る。そして予め設定したある一定時刻たとえば午前１０
時になったらその時の移動平均値（Ｃｈｓｅｔ ）’を
返送汚泥演算装置５１ｃ出力する。Up! ! In the CL collection control device, the output from the MLSS meter 8 installed in the aeration tank 1, especially near the outlet (ML
SSi)? , is input to the moving average calculation unit M4, and the average of the past 24 hours? Calculations are performed at each sampling interval of the MLSS value. Then, at a certain time set in advance, for example, 10 a.m.
When the time comes, the moving average value (Chset)' at that time is outputted to the return sludge calculation device 51c.
返送汚泥ポンプ＃５では、演算式
ＱＢ＝ （（４ｓｅｔ−Ｃｐ ） ・Ｑａ／ （ＣＲ−
ＣＡｓｅｔ）中のＣａ’）新しい設定値に変更し、該演
算式によって返送汚泥′１ｌＱＲを算出する０ここで、
返送汚泥濃度ＣＲ，流入汚水＃Ｑ３．流入浮遊物濃度（
Ｉ入ＳＳ濃度） Ｃｐは、ＭＬＳＳ計８と同様にプロセ
スから連続的に計測し、演Ｋ［ｔ５に入力する。このよ
うに演算された返送汚泥量ＱＢｓｅｔが返送汚泥Ｒ量制
御部６の目標値となり、この値になるように返送汚泥ポ
ンプ３の回転数または返送汚泥制御弁開度が調節ざする
。なお返送汚泥量には上下リミッタを付ける。For return sludge pump #5, the calculation formula QB= ((4set-Cp) ・Qa/ (CR-
Ca') in CAset) is changed to the new setting value, and the return sludge '1lQR is calculated by the calculation formula.0Here,
Return sludge concentration CR, inflow sewage #Q3. Influent suspended solids concentration (
I input SS concentration) Cp is continuously measured from the process in the same way as the MLSS meter 8, and is input to the function K[t5. The return sludge amount QBset calculated in this way becomes the target value of the return sludge R amount control section 6, and the rotational speed of the return sludge pump 3 or the opening degree of the return sludge control valve is adjusted to reach this value. In addition, upper and lower limiters are attached to the amount of returned sludge.
ＭＬＳＳ計８の設置位＃ば、曝気槽がブラッグフロータ
イブの場合、ＭＬＳＳ値の流入負荷変動による影響の少
い曝気槽出口側がよい。また、返送汚泥演算式中の返送
汚泥濃度ＣＣｒｔ）、流入汚水１ｔ（Ｃｐ）は設定値（
たとえば目標値に近い値）に設定してもよい。Regarding the installation location of the MLSS meter 8, if the aeration tank is a Bragg flow type, it is best to install it on the aeration tank outlet side, where the MLSS value is less affected by inflow load fluctuations. In addition, the return sludge concentration CCrt) and inflow sewage 1t (Cp) in the return sludge calculation formula are set values (
For example, it may be set to a value close to the target value).
本実施例による返送汚泥量制御装着によｎば、従来の制
御方式が人間の経験で設定していた制御目標値？、自動
的に適正値になるようにし几ものであり、これにより生
じる効果は次の通りである。According to the return sludge amount control installation according to this embodiment, the control target value that was set based on human experience in the conventional control method? , it is a method to automatically set the appropriate value, and the effects caused by this are as follows.
（１）最初の目標値設定が不適切であっても自動的に目
標値が適正値に修正ばれる。この修正は毎日徐々に行わ
ｎる。(1) Even if the initial target value setting is inappropriate, the target value is automatically corrected to an appropriate value. This correction is made gradually every day.
（２）汚泥プロセス内全体の汚泥量（系内汚泥量）によ
って返送汚泥制御の目標値は変る。すなわち、系内汚泥
量の制ＷＪｆ行う余剰汚泥量制御と返送汚泥量制御とは
相互干渉する。それ故、従来方式では余剰汚泥制御の設
定変更等を行うと、返送汚泥量制御の制御目標値も適切
でなくなり制御が不能となつｔす、発散する場合が生じ
念。しかるに本発明によｎば、上述のような場合でも自
動的に新しい目標値に修正し、相互干渉の悪影響を除く
ことができる。(2) The target value for return sludge control changes depending on the total amount of sludge in the sludge process (the amount of sludge in the system). That is, the excess sludge amount control performed by WJf, which controls the amount of sludge in the system, and the control of the amount of returned sludge interfere with each other. Therefore, in the conventional method, if the settings for controlling the excess sludge are changed, the control target value for controlling the amount of returned sludge becomes inappropriate, and control may become impossible or divergence may occur. However, according to the present invention, even in the above-mentioned case, it is possible to automatically correct the target value to a new target value and eliminate the adverse effects of mutual interference.
Ｇ０発明の効果
本発明は以上の如くであって、制御目標値を自動的に演
算し常に適正値に修正するようにしたから、汚水処牙！
！首の各種制御間の相互干渉がなく、高性能な返送汚泥
量制御？実行することができる０G0 Effects of the Invention The present invention is as described above, and the control target value is automatically calculated and always corrected to an appropriate value.
! High-performance return sludge volume control without mutual interference between various controls at the top? 0 that can be executed
図面は本発明の実施例に係る返送汚泥量制御装置のブロ
ック結線図である、
１・・・曝気槽、２・・・沈澱槽、３・・・返送汚泥ポ
ンプ、４・・・時間移動平均値演算部、５・・・返送汚
泥量演算部、６・・・返送汚泥流量制御部、７・・・’
Ｊ ｚツタ、８・・・ＭＬＳＳ計、９・・・流入汚泥量
針、１０・・・返送汚泥ポンプ、１１・・・返送汚泥量
針。The drawing is a block diagram of a return sludge amount control device according to an embodiment of the present invention, 1... Aeration tank, 2... Sedimentation tank, 3... Return sludge pump, 4... Hourly moving average. Value calculation unit, 5...Return sludge amount calculation unit, 6...Return sludge flow rate control unit, 7...'
J z ivy, 8...MLSS meter, 9...Inflow sludge amount needle, 10...Return sludge pump, 11...Return sludge amount needle.
Claims (1)
れた汚水を沈澱槽に導びいて処理する処理装置において
、 前記曝気槽内の汚水の混合浮遊物質濃度の時間移動変均
値を演算する演算手段と、 前記混合浮遊物質濃度の時間移動変均値に応じて所定の
時刻の定められた設定時間における返送汚泥量を算出す
る返送汚泥量演算手段と、 前記返送汚泥量演算手段により算出された返送汚泥量を
目標値として前記沈澱槽から曝気槽に返送される返送汚
泥量を制御する手段とによって構成したことを特徴とす
る返送汚泥量制御装置。[Scope of Claims] A treatment device for causing sewage to flow into an aeration tank to perform sludge treatment, and guiding the treated sewage to a settling tank for treatment, comprising: a calculation means for calculating a time movement variation average value; a return sludge amount calculation means for calculating a return sludge amount at a predetermined set time according to the time movement variation value of the mixed suspended solids concentration; and means for controlling the amount of returned sludge returned from the settling tank to the aeration tank using the amount of returned sludge calculated by the returned sludge amount calculation means as a target value.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61112184A JPH0679717B2 (en) | 1986-05-16 | 1986-05-16 | Return sludge amount control device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61112184A JPH0679717B2 (en) | 1986-05-16 | 1986-05-16 | Return sludge amount control device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS62269799A true JPS62269799A (en) | 1987-11-24 |
| JPH0679717B2 JPH0679717B2 (en) | 1994-10-12 |
Family
ID=14580356
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP61112184A Expired - Lifetime JPH0679717B2 (en) | 1986-05-16 | 1986-05-16 | Return sludge amount control device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0679717B2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH09192686A (en) * | 1996-01-12 | 1997-07-29 | Yanmar Diesel Engine Co Ltd | Activated sludge concentration measuring and controlling device |
| CN109626557A (en) * | 2018-12-19 | 2019-04-16 | 深圳信息职业技术学院 | A kind of membrane bioreactor automatically adjusting MLSS concentration |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP6697620B1 (en) | 2019-09-10 | 2020-05-20 | 知春 今井 | Artificial hair fastener and artificial hair fastening method |
-
1986
- 1986-05-16 JP JP61112184A patent/JPH0679717B2/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH09192686A (en) * | 1996-01-12 | 1997-07-29 | Yanmar Diesel Engine Co Ltd | Activated sludge concentration measuring and controlling device |
| CN109626557A (en) * | 2018-12-19 | 2019-04-16 | 深圳信息职业技术学院 | A kind of membrane bioreactor automatically adjusting MLSS concentration |
| CN109626557B (en) * | 2018-12-19 | 2023-07-18 | 深圳信息职业技术学院 | Membrane bioreactor capable of automatically adjusting MLSS concentration |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0679717B2 (en) | 1994-10-12 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EXPY | Cancellation because of completion of term |