JPS55167099A - Treatment of flocculated and precipitated sludge - Google Patents
Treatment of flocculated and precipitated sludgeInfo
- Publication number
- JPS55167099A JPS55167099A JP7577779A JP7577779A JPS55167099A JP S55167099 A JPS55167099 A JP S55167099A JP 7577779 A JP7577779 A JP 7577779A JP 7577779 A JP7577779 A JP 7577779A JP S55167099 A JPS55167099 A JP S55167099A
- Authority
- JP
- Japan
- Prior art keywords
- sludge
- added
- water
- raw water
- flocks
- 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 remove fine impurities in raw water efficiently and enhance the speed for filtering and centrifugal separation by a method wherein the pH of a sludge discharged from a flocculation precipitation tank is changed to eliminate flocks of flocculating agent and, thereafter, filtration or centrifugal separation is carried out.
CONSTITUTION: An acid is added to an alkaline raw water and an alkali is added to the acidified raw water, whereupon the pH of the sludge is changed to eliminate flocks of the flocculating agent and, thereafter, the sludge is separated and the separated liquid is added to said raw water to reutilize the acid or alkali and flocculating agent in said separated liquid. For example, when polyaluminum chloride is added to treat a fishery waste water to precipitate by flocculation, co-flocculated flocks of impurities and Al(OH)3 are precipitated. In HCl is added to this waste water sludge to adjust the pH thereof the about 3, Al(OH)3 is converted to AlCl3 and dissolved in water and, if this treated sludge is filtered by a filter press, a filtered sludge with a water content of about 74% is obtd. and a time required for filtration is shortened to about 1/3.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP7577779A JPS55167099A (en) | 1979-06-15 | 1979-06-15 | Treatment of flocculated and precipitated sludge |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP7577779A JPS55167099A (en) | 1979-06-15 | 1979-06-15 | Treatment of flocculated and precipitated sludge |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS55167099A true JPS55167099A (en) | 1980-12-26 |
Family
ID=13585976
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP7577779A Pending JPS55167099A (en) | 1979-06-15 | 1979-06-15 | Treatment of flocculated and precipitated sludge |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS55167099A (en) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4574036A (en) * | 1983-01-17 | 1986-03-04 | Ets. Ch. Scareder & Fils | Method and an installation for purifying industrial waste water, particularly process water from dyeing works |
US4923767A (en) * | 1985-06-18 | 1990-05-08 | International Fuel Cells | Fuel cell power plants employing an aqueous solution |
JPH05329498A (en) * | 1992-06-02 | 1993-12-14 | Hitachi Zosen Corp | Method for removing and recovering aluminum in sludge in water purification |
CN110963662A (en) * | 2019-12-09 | 2020-04-07 | 上海净屹环保科技有限公司 | Method for recovering aluminum salt coagulant from aluminum-containing sludge |
-
1979
- 1979-06-15 JP JP7577779A patent/JPS55167099A/en active Pending
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4574036A (en) * | 1983-01-17 | 1986-03-04 | Ets. Ch. Scareder & Fils | Method and an installation for purifying industrial waste water, particularly process water from dyeing works |
US4923767A (en) * | 1985-06-18 | 1990-05-08 | International Fuel Cells | Fuel cell power plants employing an aqueous solution |
JPH05329498A (en) * | 1992-06-02 | 1993-12-14 | Hitachi Zosen Corp | Method for removing and recovering aluminum in sludge in water purification |
CN110963662A (en) * | 2019-12-09 | 2020-04-07 | 上海净屹环保科技有限公司 | Method for recovering aluminum salt coagulant from aluminum-containing sludge |
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