JPS5753292A - Purification of waste water with active sludge - Google Patents

Purification of waste water with active sludge

Info

Publication number
JPS5753292A
JPS5753292A JP12948680A JP12948680A JPS5753292A JP S5753292 A JPS5753292 A JP S5753292A JP 12948680 A JP12948680 A JP 12948680A JP 12948680 A JP12948680 A JP 12948680A JP S5753292 A JPS5753292 A JP S5753292A
Authority
JP
Japan
Prior art keywords
sludge
vessel
concentration
separated
water
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
JP12948680A
Other languages
Japanese (ja)
Inventor
Takayuki Suzuki
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.)
Ebara Corp
Original Assignee
Ebara Infilco Co 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 Ebara Infilco Co Ltd filed Critical Ebara Infilco Co Ltd
Priority to JP12948680A priority Critical patent/JPS5753292A/en
Publication of JPS5753292A publication Critical patent/JPS5753292A/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 enhance the concentration of active sludge in an aeration vessel, perform high- load water purification and stabilize the quality of purified water, by returning concentrated sludge obtained by centrifugal separation of an effluent from the aeration vessel and sludge separated in a sedimentation vessel into the aeration vessel.
CONSTITUTION: An effluent from an aeration vessel 2 is introduced into a centrifugal separator 3 to concentrate sludge. A part of the concentrated sludge 9 is returned as returned sludge 5 to an active sludge-aerating step, while the remainder is discharged as excess sludge 7 outside the system. Concentration-separated water 8 is fed through a deaeration vessel 12 to a sedimentation vessel 4, and separated into a supernatant 10 and precipitating sludge 11. At least a part of the precipitating sludge is returned to the active sludge-aerating step. In this process, SS concentration in the separated water obtained by the centrifugal separation is maintained at about 8,000mg/l or less to raise SS concentration in the concentrated sludge 9. This process enables a flexible countermeasure in response to variation in load of waste water, and well-purified water can be obtained under a stable condition.
COPYRIGHT: (C)1982,JPO&Japio
JP12948680A 1980-09-18 1980-09-18 Purification of waste water with active sludge Pending JPS5753292A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP12948680A JPS5753292A (en) 1980-09-18 1980-09-18 Purification of waste water with active sludge

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP12948680A JPS5753292A (en) 1980-09-18 1980-09-18 Purification of waste water with active sludge

Publications (1)

Publication Number Publication Date
JPS5753292A true JPS5753292A (en) 1982-03-30

Family

ID=15010664

Family Applications (1)

Application Number Title Priority Date Filing Date
JP12948680A Pending JPS5753292A (en) 1980-09-18 1980-09-18 Purification of waste water with active sludge

Country Status (1)

Country Link
JP (1) JPS5753292A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57184493A (en) * 1981-05-07 1982-11-13 Shinryo Air Conditioning Co Ltd Improvement of svi of mixed liquid in aeration vessel
US5055204A (en) * 1989-08-29 1991-10-08 Bogart John D Soil and sludge treatment apparatus and method including agitation, aeration and recirculation

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5597294A (en) * 1979-01-22 1980-07-24 Kubota Ltd Treatment of water

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5597294A (en) * 1979-01-22 1980-07-24 Kubota Ltd Treatment of water

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57184493A (en) * 1981-05-07 1982-11-13 Shinryo Air Conditioning Co Ltd Improvement of svi of mixed liquid in aeration vessel
US5055204A (en) * 1989-08-29 1991-10-08 Bogart John D Soil and sludge treatment apparatus and method including agitation, aeration and recirculation

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