JPS55134696A - Surplus sludge control in sewage treatment process - Google Patents

Surplus sludge control in sewage treatment process

Info

Publication number
JPS55134696A
JPS55134696A JP4205879A JP4205879A JPS55134696A JP S55134696 A JPS55134696 A JP S55134696A JP 4205879 A JP4205879 A JP 4205879A JP 4205879 A JP4205879 A JP 4205879A JP S55134696 A JPS55134696 A JP S55134696A
Authority
JP
Japan
Prior art keywords
sludge
suction
qwt
suction pump
sewage treatment
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
JP4205879A
Other languages
Japanese (ja)
Other versions
JPS5752119B2 (en
Inventor
Nobutsugu Kato
Masami Koide
Masaya Tanuma
Masahiko Kashiwagi
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 JP4205879A priority Critical patent/JPS55134696A/en
Publication of JPS55134696A publication Critical patent/JPS55134696A/en
Publication of JPS5752119B2 publication Critical patent/JPS5752119B2/ja
Granted 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

Abstract

PURPOSE: To enhance the quality of discharged water through maintaining constant mean value for sludge concentration in an aeration tank by a method wherein sludge content in sewage treatment process is always controlled at a proper value even when sludge suction pump is intermittently operated.
CONSTITUTION: Accumulated value (QWT) of suction quantity is obtained assuming a case in which sludge is continuously sucked when sludge suction pump is stopped. From QWT, necessary quantity (QWT/T) to be sucked during a time given fro operation of the suction pump. This is add to the quantity of suction sludge to determine the sludge to be drawn actually. In actual operation, a target value is determined from sludge concentration in the aeration tank, returned sludge concentration, and sludge operation days. Then, the sludge suction quantity (QW) is determined so that the process operation days can meet the target value, effecting sludge control.
COPYRIGHT: (C)1980,JPO&Japio
JP4205879A 1979-04-09 1979-04-09 Surplus sludge control in sewage treatment process Granted JPS55134696A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP4205879A JPS55134696A (en) 1979-04-09 1979-04-09 Surplus sludge control in sewage treatment process

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP4205879A JPS55134696A (en) 1979-04-09 1979-04-09 Surplus sludge control in sewage treatment process

Publications (2)

Publication Number Publication Date
JPS55134696A true JPS55134696A (en) 1980-10-20
JPS5752119B2 JPS5752119B2 (en) 1982-11-05

Family

ID=12625494

Family Applications (1)

Application Number Title Priority Date Filing Date
JP4205879A Granted JPS55134696A (en) 1979-04-09 1979-04-09 Surplus sludge control in sewage treatment process

Country Status (1)

Country Link
JP (1) JPS55134696A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5876189A (en) * 1981-10-30 1983-05-09 Yoshizumi Ogishima System for purification of water with active sludge
JPS5955392A (en) * 1982-09-22 1984-03-30 Toshiba Corp Adjustment device for sludge water

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59150223U (en) * 1983-03-29 1984-10-08 本田技研工業株式会社 Lawn mower blade holder mounting structure

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5876189A (en) * 1981-10-30 1983-05-09 Yoshizumi Ogishima System for purification of water with active sludge
JPS5955392A (en) * 1982-09-22 1984-03-30 Toshiba Corp Adjustment device for sludge water

Also Published As

Publication number Publication date
JPS5752119B2 (en) 1982-11-05

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