JPS5640500A - Dehydration of activated sludge - Google Patents
Dehydration of activated sludgeInfo
- Publication number
- JPS5640500A JPS5640500A JP11569779A JP11569779A JPS5640500A JP S5640500 A JPS5640500 A JP S5640500A JP 11569779 A JP11569779 A JP 11569779A JP 11569779 A JP11569779 A JP 11569779A JP S5640500 A JPS5640500 A JP S5640500A
- Authority
- JP
- Japan
- Prior art keywords
- activated sludge
- dehydration
- tank
- strong acid
- acid
- 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
Links
Landscapes
- Treatment Of Sludge (AREA)
Abstract
PURPOSE: To destroy microorganisms present in the activated sludge to perform preferably dehydration of a mechanical method, by dehydrating the activated sludge using a dehydrator whose pH value has been well lowered by adding strong acid.
CONSTITUTION: The activated sludge 2 in a activated sludge tank 1 is charged into a pH adjusting tank 3, to which the strong acid such as bydrochloric acid or sulfuric acid in a strong acid tank 4 is added. The mixture is stirred to destroy the microorganisms in the activated sludge. Thereafter the mixture is treated by a dehydrator such as a screw press to obtain excellently dehydrated sludge. Thus by a simple pretreatment on the activated sludge, dehydration is improved.
COPYRIGHT: (C)1981,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP11569779A JPS5640500A (en) | 1979-09-11 | 1979-09-11 | Dehydration of activated sludge |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP11569779A JPS5640500A (en) | 1979-09-11 | 1979-09-11 | Dehydration of activated sludge |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5640500A true JPS5640500A (en) | 1981-04-16 |
Family
ID=14668989
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP11569779A Pending JPS5640500A (en) | 1979-09-11 | 1979-09-11 | Dehydration of activated sludge |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5640500A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS594030A (en) * | 1982-06-16 | 1984-01-10 | ゼネラル・シグナル・コ−ポレ−シヨン | Method and device for slicing semiconductor ingot |
JPH0394900A (en) * | 1989-09-05 | 1991-04-19 | Ebara Infilco Co Ltd | Dehydrating treatment of organic sludge |
-
1979
- 1979-09-11 JP JP11569779A patent/JPS5640500A/en active Pending
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS594030A (en) * | 1982-06-16 | 1984-01-10 | ゼネラル・シグナル・コ−ポレ−シヨン | Method and device for slicing semiconductor ingot |
JPH0394900A (en) * | 1989-09-05 | 1991-04-19 | Ebara Infilco Co Ltd | Dehydrating treatment of organic sludge |
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