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JPS565185A - Treatment of waste water of low biochemical oxygen demand - Google Patents

Treatment of waste water of low biochemical oxygen demand

Info

Publication number
JPS565185A
JPS565185A JP7996679A JP7996679A JPS565185A JP S565185 A JPS565185 A JP S565185A JP 7996679 A JP7996679 A JP 7996679A JP 7996679 A JP7996679 A JP 7996679A JP S565185 A JPS565185 A JP S565185A
Authority
JP
Japan
Prior art keywords
waste water
low
bod
concentration
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.)
Pending
Application number
JP7996679A
Other languages
Japanese (ja)
Inventor
Noboru Mitsumoto
Hidekazu Fujimura
Takao Mori
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.)
Sumitomo Heavy Industries Envirotech Inc
Original Assignee
Sumitomo Heavy Industries Envirotech Inc
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 Sumitomo Heavy Industries Envirotech Inc filed Critical Sumitomo Heavy Industries Envirotech Inc
Priority to JP7996679A priority Critical patent/JPS565185A/en
Publication of JPS565185A publication Critical patent/JPS565185A/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 obtain stable treated water from low-BOD waste water by adding activated sludge obtaned from a separate low-BOD waste water containing similar components to the low-BOD waste water in an aeration process.
CONSTITUTION: To a low-BOD waste water of a BOD concentration of 50W150 ppm, activated sludge obtained from a waste water containing principal components similar to the low-BOD waste water to be treated is added separately from returned slduge from the final sedimentation process, at an aeration process, where the concentration of MLSS in the mixed liquor is kept at approx. 3,000W3,500ppm. Then, in the preceding stage, namely flocculating stage, of the final sedimentation process, an inorganic flocculant and a high molecular flocculant are added. Thus, stable quality of treated water can be obtained while keeping the concentration of MLSS in the aeration process constant.
COPYRIGHT: (C)1981,JPO&Japio
JP7996679A 1979-06-25 1979-06-25 Treatment of waste water of low biochemical oxygen demand Pending JPS565185A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP7996679A JPS565185A (en) 1979-06-25 1979-06-25 Treatment of waste water of low biochemical oxygen demand

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP7996679A JPS565185A (en) 1979-06-25 1979-06-25 Treatment of waste water of low biochemical oxygen demand

Publications (1)

Publication Number Publication Date
JPS565185A true JPS565185A (en) 1981-01-20

Family

ID=13705046

Family Applications (1)

Application Number Title Priority Date Filing Date
JP7996679A Pending JPS565185A (en) 1979-06-25 1979-06-25 Treatment of waste water of low biochemical oxygen demand

Country Status (1)

Country Link
JP (1) JPS565185A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH02266924A (en) * 1989-04-10 1990-10-31 Sadami Ito Pleating method and apparatus for molding paper cup
US5465642A (en) * 1993-12-30 1995-11-14 Gotoh Gut Yugen Kaisha Neck straightener for stringed instrument
JP2015009168A (en) * 2013-06-26 2015-01-19 住友重機械エンバイロメント株式会社 Flocculation sedimentation active sludge treatment system, and method for operating the same

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH02266924A (en) * 1989-04-10 1990-10-31 Sadami Ito Pleating method and apparatus for molding paper cup
US5465642A (en) * 1993-12-30 1995-11-14 Gotoh Gut Yugen Kaisha Neck straightener for stringed instrument
JP2015009168A (en) * 2013-06-26 2015-01-19 住友重機械エンバイロメント株式会社 Flocculation sedimentation active sludge treatment system, and method for operating the same

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