JPS5638196A - Concentrating method for sludge - Google Patents
Concentrating method for sludgeInfo
- Publication number
- JPS5638196A JPS5638196A JP11353779A JP11353779A JPS5638196A JP S5638196 A JPS5638196 A JP S5638196A JP 11353779 A JP11353779 A JP 11353779A JP 11353779 A JP11353779 A JP 11353779A JP S5638196 A JPS5638196 A JP S5638196A
- Authority
- JP
- Japan
- Prior art keywords
- sludge
- nitrite
- time
- reaction
- surplus
- 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 concentrate the sludge, by adding nitrate or nitrite in surplus sludge or mixed sludge to promote the denitrifying reaction by denitrifying bacteria and then floating the sludge by N2 gas generated on this occasion.
CONSTITUTION: Surplus sludge produced at the time of treating waste water such as sewage of all kinds of industrial waste water, by activated sludge method, is concentrated as follows. Nitrate such as NaNO3 etc. or nitrite such as NaNO2 etc., is added to the surplus sludge or mixed sludge so as to nitiric acid or nitrous acid type N component exists at about ≥7W8ppm in the sludge. NO3-N or NO2-N in the sludge is increased by said addition treatment and denitrif reaction is promoted and generating quantity of N2 is increased. As a result, the sludge is positively floated and concentrated by air bubbles at the time of N2 generation. Further, treating condition other than adding nitrate or nitrite is the normal condition at the time of performing denitrifying reaction, for example, it is suitable to be in the range of 0W50°C, especially 25±5°C and 6W8pH.
COPYRIGHT: (C)1981,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP11353779A JPS5638196A (en) | 1979-09-06 | 1979-09-06 | Concentrating method for sludge |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP11353779A JPS5638196A (en) | 1979-09-06 | 1979-09-06 | Concentrating method for sludge |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5638196A true JPS5638196A (en) | 1981-04-13 |
Family
ID=14614825
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP11353779A Pending JPS5638196A (en) | 1979-09-06 | 1979-09-06 | Concentrating method for sludge |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5638196A (en) |
-
1979
- 1979-09-06 JP JP11353779A patent/JPS5638196A/en active Pending
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