JPS57153793A - Controller for concentration of bacteria in active sludge inside aeration vessel - Google Patents
Controller for concentration of bacteria in active sludge inside aeration vesselInfo
- Publication number
- JPS57153793A JPS57153793A JP56041443A JP4144381A JPS57153793A JP S57153793 A JPS57153793 A JP S57153793A JP 56041443 A JP56041443 A JP 56041443A JP 4144381 A JP4144381 A JP 4144381A JP S57153793 A JPS57153793 A JP S57153793A
- Authority
- JP
- Japan
- Prior art keywords
- flow rate
- aeration vessel
- controller
- sewage
- adder
- 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
- Activated Sludge Processes (AREA)
Abstract
PURPOSE: To control the concentration of bacteria in active sludge at the most proper level in the purification of sewage, by grasping a flow rate inside an aeration vessel from the changes of a returned sludge flow rate and an inflow sewage flow rate, and changing a storage gain in response to the grasped flow rate.
CONSTITUTION: A returned sludge flow rate Qr and an inflow sewage flow rate Qi detected by flow meters 6 and 7, respectively, are added by an adder 16. The reciprocal of the sectional area of a sewage-flowing line inside an aeration vessel 1 is multiplied to Qi+Qr obtained by the adder 16, by a multiplier 17 to obtain a flow speed Va inside the aeration vessel 1. A computer 15 introduces the flow speed Va and calculates a proportional storage gain G=f(Va) with the function f(Va) of the flow speed Va. The gain G is multiplied to a difference between MLSS Cb inside the aeration vessel 1 obtained by a MLSS controller 3 and an objective value Cb* by a multiplier 14, and the result is introduced into an adder 10 to control a returned sludge valve 9 with a returned sludge flow rate-controller 5.
COPYRIGHT: (C)1982,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP56041443A JPS57153793A (en) | 1981-03-19 | 1981-03-19 | Controller for concentration of bacteria in active sludge inside aeration vessel |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP56041443A JPS57153793A (en) | 1981-03-19 | 1981-03-19 | Controller for concentration of bacteria in active sludge inside aeration vessel |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS57153793A true JPS57153793A (en) | 1982-09-22 |
Family
ID=12608506
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP56041443A Pending JPS57153793A (en) | 1981-03-19 | 1981-03-19 | Controller for concentration of bacteria in active sludge inside aeration vessel |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS57153793A (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 |
CN108761042A (en) * | 2018-07-23 | 2018-11-06 | 三峡大学 | A kind of research device and method of sediment concentration and greenhouse gases relationship |
-
1981
- 1981-03-19 JP JP56041443A patent/JPS57153793A/en active Pending
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 |
CN108761042A (en) * | 2018-07-23 | 2018-11-06 | 三峡大学 | A kind of research device and method of sediment concentration and greenhouse gases relationship |
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