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JPS5527052A - Sludge floatation and concentration - Google Patents

Sludge floatation and concentration

Info

Publication number
JPS5527052A
JPS5527052A JP9938578A JP9938578A JPS5527052A JP S5527052 A JPS5527052 A JP S5527052A JP 9938578 A JP9938578 A JP 9938578A JP 9938578 A JP9938578 A JP 9938578A JP S5527052 A JPS5527052 A JP S5527052A
Authority
JP
Japan
Prior art keywords
sludge
bath
waste water
exposing
float
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
JP9938578A
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 JP9938578A priority Critical patent/JPS5527052A/en
Publication of JPS5527052A publication Critical patent/JPS5527052A/en
Pending legal-status Critical Current

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  • Purification Treatments By Anaerobic Or Anaerobic And Aerobic Bacteria Or Animals (AREA)

Abstract

PURPOSE: In waste water treatment by active sludge, a part of mixture liquid in air exposing bath is introduced into sludge concentration bath, where nitrogen gas generated by denitrification is utilized to float and concentrate sludge in economical way.
CONSTITUTION: Waste water 1 such as sewage containing ammonia and returned sludge 4 are treated in the air exposing bath 2. The process decomposes BOD in the water 1 and transforms ammonia into nitrogen oxides. Active sludge mixed liquid in the exposing bath 2 is partly transferred to the mixer 5, where it is mixed with a part of waste water 8, and introduced into the float concentration process 6. There, nitrogen gas generated by denitrification of nitrogen oxides causes the sludge to be floated and separated, from which float sludge 7 is sent to sludge treatment. The separated water is returned to the exposing bath 2. Thus, the simple equipment economically concentrate sludge to clean waste water.
COPYRIGHT: (C)1980,JPO&Japio
JP9938578A 1978-08-15 1978-08-15 Sludge floatation and concentration Pending JPS5527052A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP9938578A JPS5527052A (en) 1978-08-15 1978-08-15 Sludge floatation and concentration

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP9938578A JPS5527052A (en) 1978-08-15 1978-08-15 Sludge floatation and concentration

Publications (1)

Publication Number Publication Date
JPS5527052A true JPS5527052A (en) 1980-02-26

Family

ID=14246033

Family Applications (1)

Application Number Title Priority Date Filing Date
JP9938578A Pending JPS5527052A (en) 1978-08-15 1978-08-15 Sludge floatation and concentration

Country Status (1)

Country Link
JP (1) JPS5527052A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5527062A (en) * 1978-08-16 1980-02-26 Ebara Infilco Co Ltd Concentration of sludge
JPS5864198A (en) * 1981-10-15 1983-04-16 Hitachi Plant Eng & Constr Co Ltd Method and apparatus for biologically denitrifying waste water

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5152668A (en) * 1974-11-01 1976-05-10 Sato Zoki Co Ltd

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5152668A (en) * 1974-11-01 1976-05-10 Sato Zoki Co Ltd

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5527062A (en) * 1978-08-16 1980-02-26 Ebara Infilco Co Ltd Concentration of sludge
JPS6244998B2 (en) * 1978-08-16 1987-09-24 Ebara Infilco
JPS5864198A (en) * 1981-10-15 1983-04-16 Hitachi Plant Eng & Constr Co Ltd Method and apparatus for biologically denitrifying waste water
JPS6321558B2 (en) * 1981-10-15 1988-05-07 Hitachi Plant Eng & Constr Co

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