JPS5556895A - Predictive controlling method for concentration of mixed liquor suspended solid in active sludge method - Google Patents

Predictive controlling method for concentration of mixed liquor suspended solid in active sludge method

Info

Publication number
JPS5556895A
JPS5556895A JP13052178A JP13052178A JPS5556895A JP S5556895 A JPS5556895 A JP S5556895A JP 13052178 A JP13052178 A JP 13052178A JP 13052178 A JP13052178 A JP 13052178A JP S5556895 A JPS5556895 A JP S5556895A
Authority
JP
Japan
Prior art keywords
concentration
amount
aeration tank
mlss
sludge
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
Application number
JP13052178A
Other languages
Japanese (ja)
Other versions
JPS5814837B2 (en
Inventor
Shoji Yamamoto
Toshihiro Komiya
Shiro Murakami
Atsuko Shiraishi
Makoto Shiotani
Shiyouichi Masui
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.)
Hitachi Ltd
Original Assignee
Hitachi Ltd
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 Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP53130521A priority Critical patent/JPS5814837B2/en
Publication of JPS5556895A publication Critical patent/JPS5556895A/en
Publication of JPS5814837B2 publication Critical patent/JPS5814837B2/en
Expired 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 perform a predictive control of MLSS concentration exactly with an allowance for growth amount by controlling the amount of sludge inside aeration tank by making a predictive calculation of concentration of mixed liquor suspended solids (MLSS) in aeration tank.
CONSTITUTION: Using the actually measured values of entering sewage amount, entering sewage SS concentration, MLSS concentration at the outlet of aeration tank, returned sludge amount, and returned sludge concentration, the amount of grown sludge and the growth rate are obtained from an equation of sludge balance at the inlet and outlet of the aeration tank with an allowance for the residence time. Then, the MLSS concentration at the outlet of the aeration tank is claculated from values obtained by predicting the growth rate on that day on the basis of the growth rates in the past, and then the residence time is calculated by using the predicted value of inflow and the amount of returned sludge in the following scheduled operations. Also, after the calculation of predicted MLSS concentration after the residence time at the outlet of the aeration tank for entering sewage at the present time, it is compared with the set value of MLSS received separately, and if the set value is unsatisfying, recalculation is made by changing returned sludge amount and the returned sludge amount is determined by aiming at the MLSS concentration as a target.
COPYRIGHT: (C)1980,JPO&Japio
JP53130521A 1978-10-25 1978-10-25 Predictive control method for mixed liquid suspended solids concentration in activated sludge method Expired JPS5814837B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP53130521A JPS5814837B2 (en) 1978-10-25 1978-10-25 Predictive control method for mixed liquid suspended solids concentration in activated sludge method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP53130521A JPS5814837B2 (en) 1978-10-25 1978-10-25 Predictive control method for mixed liquid suspended solids concentration in activated sludge method

Publications (2)

Publication Number Publication Date
JPS5556895A true JPS5556895A (en) 1980-04-26
JPS5814837B2 JPS5814837B2 (en) 1983-03-22

Family

ID=15036278

Family Applications (1)

Application Number Title Priority Date Filing Date
JP53130521A Expired JPS5814837B2 (en) 1978-10-25 1978-10-25 Predictive control method for mixed liquid suspended solids concentration in activated sludge method

Country Status (1)

Country Link
JP (1) JPS5814837B2 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0420379Y2 (en) * 1986-05-20 1992-05-11
JPS641643U (en) * 1987-06-22 1989-01-06

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4923946A (en) * 1972-06-30 1974-03-02

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4923946A (en) * 1972-06-30 1974-03-02

Also Published As

Publication number Publication date
JPS5814837B2 (en) 1983-03-22

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