JPS57153793A - Controller for concentration of bacteria in active sludge inside aeration vessel - Google Patents

Controller for concentration of bacteria in active sludge inside aeration vessel

Info

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
Application number
JP56041443A
Other languages
Japanese (ja)
Inventor
Yuji Taniguchi
Shunji Osada
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Mitsubishi Electric Corp
Original Assignee
Mitsubishi Electric Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Mitsubishi Electric Corp filed Critical Mitsubishi Electric Corp
Priority to JP56041443A priority Critical patent/JPS57153793A/en
Publication of JPS57153793A publication Critical patent/JPS57153793A/en
Pending legal-status Critical Current

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
JP56041443A 1981-03-19 1981-03-19 Controller for concentration of bacteria in active sludge inside aeration vessel Pending JPS57153793A (en)

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)

* Cited by examiner, † Cited by third party
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

Cited By (2)

* Cited by examiner, † Cited by third party
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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