JPS5570394A - Biological treatment of organic waste water - Google Patents

Biological treatment of organic waste water

Info

Publication number
JPS5570394A
JPS5570394A JP14476178A JP14476178A JPS5570394A JP S5570394 A JPS5570394 A JP S5570394A JP 14476178 A JP14476178 A JP 14476178A JP 14476178 A JP14476178 A JP 14476178A JP S5570394 A JPS5570394 A JP S5570394A
Authority
JP
Japan
Prior art keywords
tank
water
returned
sludge
aeration
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
JP14476178A
Other languages
Japanese (ja)
Other versions
JPS6120358B2 (en
Inventor
Takayuki Suzuki
Toshihiro Tanaka
Taisuke Toya
Yoshitaka Matsuo
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 JP14476178A priority Critical patent/JPS5570394A/en
Publication of JPS5570394A publication Critical patent/JPS5570394A/en
Publication of JPS6120358B2 publication Critical patent/JPS6120358B2/ja
Granted legal-status Critical Current

Links

Landscapes

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

Abstract

PURPOSE: To enhance the removal efficiency of BOD and enable the treatment of P, N component by a mechanism wherein a waste water is treated by active sludge after treated unaerobically and a froth formed during a froth floatation and concentration process is returned to an activated sludge aeration process, thereafter a part of the mixed liquid of this aeration process is returned to an unaerobic treating process.
CONSTITUTION: A raw water 1 containing BOD, N compounds and PO4 is flowed into an unaerobic tank 4 along with a returned water 2 from an aeration tank 5 and a bound oxygen of dissolved O2 or NOx within the returned water is reduced by the BOD of the raw water. When an aeration tank 4 becomes completly to an unaerobic condition, the raw water is flowed into an aeration tank 5 and the BOD component is removed. Next, a part of the raw water is returned to an unaerobic tank 4 and the remainder portion is flowed into a sludge floatation and concentration tank 6 along with a pressurized water 7, then the sludge is separated by floatation and the separated water is discharged as the treated water 9. The froth (the floated sludge) 10 of a concentration tank 6 is dropped into an aeration tank 5 by a scraping machine 11 and broken, deaerated and diluted by the mixed liquid of the tank 5, thereafter returned to the tank 4 and the remainder portion is flowed into the tank 6 and treated.
COPYRIGHT: (C)1980,JPO&Japio
JP14476178A 1978-11-22 1978-11-22 Biological treatment of organic waste water Granted JPS5570394A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP14476178A JPS5570394A (en) 1978-11-22 1978-11-22 Biological treatment of organic waste water

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP14476178A JPS5570394A (en) 1978-11-22 1978-11-22 Biological treatment of organic waste water

Publications (2)

Publication Number Publication Date
JPS5570394A true JPS5570394A (en) 1980-05-27
JPS6120358B2 JPS6120358B2 (en) 1986-05-21

Family

ID=15369779

Family Applications (1)

Application Number Title Priority Date Filing Date
JP14476178A Granted JPS5570394A (en) 1978-11-22 1978-11-22 Biological treatment of organic waste water

Country Status (1)

Country Link
JP (1) JPS5570394A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5573395A (en) * 1978-11-25 1980-06-03 Ebara Infilco Co Ltd Biological treatment of organic waste water

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5573395A (en) * 1978-11-25 1980-06-03 Ebara Infilco Co Ltd Biological treatment of organic waste water
JPS6150680B2 (en) * 1978-11-25 1986-11-05 Ebara Infilco

Also Published As

Publication number Publication date
JPS6120358B2 (en) 1986-05-21

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