JPS5638197A - Concentrating method for sludge - Google Patents
Concentrating method for sludgeInfo
- Publication number
- JPS5638197A JPS5638197A JP11355079A JP11355079A JPS5638197A JP S5638197 A JPS5638197 A JP S5638197A JP 11355079 A JP11355079 A JP 11355079A JP 11355079 A JP11355079 A JP 11355079A JP S5638197 A JPS5638197 A JP S5638197A
- Authority
- JP
- Japan
- Prior art keywords
- sludge
- pressure
- floated
- solid matter
- nano
- 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 effectively float and separate the solid matter in sludge and to concentrate the sludge, by using both the gas generated under reduced pressure and N2 gas generated by denitrifying reaction after dissolving the gas in the sludge added nitrate or nitrite under pressure.
CONSTITUTION: Sludge is introduced into the pressure tank 3 after adding nitrate (e.g. NaNO3) or nitrite (e.g. NaNO2) to the sludge and compressed air is blown into from the compressor 2 and then, is dissolved in the sludge. Next, said sludge is introduced into the floation vessel 5 after transferring to the pressure reducing apparatus 4 such as valve, orifice and reducing the pressure. Then, a large parts of solid matter are floated sticking with air bubbles generated by reduced pressure in the vessel 5 and also, not floating part is slowly floated by the progress of denitrifying reaction. As a result, the sludge is effectively floated and separated and also, clogging of the tank 3 by the solid matter in the sludge, can be prevented.
COPYRIGHT: (C)1981,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP11355079A JPS5638197A (en) | 1979-09-06 | 1979-09-06 | Concentrating method for sludge |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP11355079A JPS5638197A (en) | 1979-09-06 | 1979-09-06 | Concentrating method for sludge |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5638197A true JPS5638197A (en) | 1981-04-13 |
Family
ID=14615136
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP11355079A Pending JPS5638197A (en) | 1979-09-06 | 1979-09-06 | Concentrating method for sludge |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5638197A (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4767537A (en) * | 1987-03-30 | 1988-08-30 | Davco | Dewatering of sludge using nitrate |
JP2007246575A (en) * | 2006-03-14 | 2007-09-27 | Jfe Steel Kk | Method for operating cog blower device |
CN102249506A (en) * | 2010-05-19 | 2011-11-23 | 中国石油化工股份有限公司 | Treatment method of PTA (purified terephthalic acid) chemical wastewater excess sludge |
-
1979
- 1979-09-06 JP JP11355079A patent/JPS5638197A/en active Pending
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4767537A (en) * | 1987-03-30 | 1988-08-30 | Davco | Dewatering of sludge using nitrate |
JP2007246575A (en) * | 2006-03-14 | 2007-09-27 | Jfe Steel Kk | Method for operating cog blower device |
CN102249506A (en) * | 2010-05-19 | 2011-11-23 | 中国石油化工股份有限公司 | Treatment method of PTA (purified terephthalic acid) chemical wastewater excess sludge |
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