JPS5486962A - Treatment of waste-containing liquid - Google Patents

Treatment of waste-containing liquid

Info

Publication number
JPS5486962A
JPS5486962A JP15597677A JP15597677A JPS5486962A JP S5486962 A JPS5486962 A JP S5486962A JP 15597677 A JP15597677 A JP 15597677A JP 15597677 A JP15597677 A JP 15597677A JP S5486962 A JPS5486962 A JP S5486962A
Authority
JP
Japan
Prior art keywords
sludge
activated sludge
water
activating
activated
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
JP15597677A
Other languages
Japanese (ja)
Inventor
Kazuji Fukunaga
Tsutomu Nakamura
Toshinori Yoshizaki
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.)
Kuraray Co Ltd
Original Assignee
Kuraray 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 Kuraray Co Ltd filed Critical Kuraray Co Ltd
Priority to JP15597677A priority Critical patent/JPS5486962A/en
Publication of JPS5486962A publication Critical patent/JPS5486962A/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 raise the concentration of sludge in an aeration vessel and prevent the production of surplus sludge, by providing an appratus for mechanically grinding down the activated sludge and by adding an water-soluble metal salt to the ground- down activated sludge when waste water is treated by activating the sludge.
CONSTITUTION: When the waste water is treated by activating the sludge, the apparatus (wherein, for example, the sludge is passed through a gap of 1.8 mm or less between a casing and a runner which rapidly rotates at the rate of 500 rpm or more) for mechanically grinding down the activated sludge in a position (for example, in the aeration vessel or a sludge return pipe) in contact with the activated sludge except in a sedimenting separation process. The water-soluble metal salt (for instance, a salt of Na+, Ca++, Mg++ or other) is added to the groung-down activated sludge passed through the apparatus. Thereby, filiform microbes are divided into minute particles and the flocks of the activated sludge are broken. Therefore, the sedimentation performance is improved.
COPYRIGHT: (C)1979,JPO&Japio
JP15597677A 1977-12-22 1977-12-22 Treatment of waste-containing liquid Pending JPS5486962A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP15597677A JPS5486962A (en) 1977-12-22 1977-12-22 Treatment of waste-containing liquid

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP15597677A JPS5486962A (en) 1977-12-22 1977-12-22 Treatment of waste-containing liquid

Publications (1)

Publication Number Publication Date
JPS5486962A true JPS5486962A (en) 1979-07-10

Family

ID=15617636

Family Applications (1)

Application Number Title Priority Date Filing Date
JP15597677A Pending JPS5486962A (en) 1977-12-22 1977-12-22 Treatment of waste-containing liquid

Country Status (1)

Country Link
JP (1) JPS5486962A (en)

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