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JPS6480498A - Treatment of organic sewage - Google Patents

Treatment of organic sewage

Info

Publication number
JPS6480498A
JPS6480498A JP62234798A JP23479887A JPS6480498A JP S6480498 A JPS6480498 A JP S6480498A JP 62234798 A JP62234798 A JP 62234798A JP 23479887 A JP23479887 A JP 23479887A JP S6480498 A JPS6480498 A JP S6480498A
Authority
JP
Japan
Prior art keywords
slurry
membrane
activated sludge
subjected
calcium phosphate
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
JP62234798A
Other languages
Japanese (ja)
Inventor
Katsuyuki Kataoka
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
Ebara Research Co Ltd
Original Assignee
Ebara Research Co Ltd
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 Research Co Ltd, Ebara Infilco Co Ltd filed Critical Ebara Research Co Ltd
Priority to JP62234798A priority Critical patent/JPS6480498A/en
Publication of JPS6480498A publication Critical patent/JPS6480498A/en
Pending legal-status Critical Current

Links

Abstract

PURPOSE:To prevent the generation of hardly dehydratable sludge by adding Ca<2+> to the activated sludge slurry obtd. by the biological nitrification and denitrification treatment of org. sewage, subjecting the slurry to a membrane sepn. at specific pH and bringing the water permeated through the membrane into contact with a calcium phosphate compd. CONSTITUTION:Night soil 1 subjected to scum removal is supplied without dilution to a biological nitrification and denitrification stage 2 and is subjected to the nitrification and denitrification stage to obtain the activated sludge slurry in the case of treating, for example, night soil. Ca<2+> 3 is added to this activated sludge slurry at a point such as denitrifying part 2'. This activated sludge slurry 4 is maintained at 7.0-10.0pH and is stagnated under stirring for more than several hours to form the precipitate of the calcium phosphate adsorbed with the COO components. This activated sludge slurry 4 is then supplied to a membrane sepn. stage 5 such as ultrafilter membrane and is subjected to the membrane sepn. to completely capture the activated sludge and the colloidal SS of the calcium phosphate which is hardly separable by settling. The slurry is thereby separated to the water 6 which is permeated through the membrane and contains zero SS and the membrane separated slurry 7.
JP62234798A 1987-09-21 1987-09-21 Treatment of organic sewage Pending JPS6480498A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP62234798A JPS6480498A (en) 1987-09-21 1987-09-21 Treatment of organic sewage

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP62234798A JPS6480498A (en) 1987-09-21 1987-09-21 Treatment of organic sewage

Publications (1)

Publication Number Publication Date
JPS6480498A true JPS6480498A (en) 1989-03-27

Family

ID=16976556

Family Applications (1)

Application Number Title Priority Date Filing Date
JP62234798A Pending JPS6480498A (en) 1987-09-21 1987-09-21 Treatment of organic sewage

Country Status (1)

Country Link
JP (1) JPS6480498A (en)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5293162A (en) * 1976-01-12 1977-08-05 Ebara Infilco Co Ltd Method for treating waste water
JPS59206092A (en) * 1983-05-10 1984-11-21 Hitachi Plant Eng & Constr Co Ltd Wastewater treatment method
JPS59228993A (en) * 1983-06-08 1984-12-22 Kurita Water Ind Ltd High-degree treatment of biological treating water
JPS6144556A (en) * 1984-08-07 1986-03-04 Hitachi Metals Ltd Tool correction value output device

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5293162A (en) * 1976-01-12 1977-08-05 Ebara Infilco Co Ltd Method for treating waste water
JPS59206092A (en) * 1983-05-10 1984-11-21 Hitachi Plant Eng & Constr Co Ltd Wastewater treatment method
JPS59228993A (en) * 1983-06-08 1984-12-22 Kurita Water Ind Ltd High-degree treatment of biological treating water
JPS6144556A (en) * 1984-08-07 1986-03-04 Hitachi Metals Ltd Tool correction value output device

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