JPS5479953A - Method of floating and concentrating sludge - Google Patents
Method of floating and concentrating sludgeInfo
- Publication number
- JPS5479953A JPS5479953A JP14747677A JP14747677A JPS5479953A JP S5479953 A JPS5479953 A JP S5479953A JP 14747677 A JP14747677 A JP 14747677A JP 14747677 A JP14747677 A JP 14747677A JP S5479953 A JPS5479953 A JP S5479953A
- Authority
- JP
- Japan
- Prior art keywords
- froth
- solid
- stabilize
- accumulation
- once per
- 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.)
- Granted
Links
- 238000000034 method Methods 0.000 title abstract 2
- 239000010802 sludge Substances 0.000 title abstract 2
- 239000007787 solid Substances 0.000 abstract 5
- 238000009825 accumulation Methods 0.000 abstract 2
- 230000000717 retained effect Effects 0.000 abstract 1
- 238000007790 scraping Methods 0.000 abstract 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract 1
Landscapes
- Physical Water Treatments (AREA)
- Treatment Of Sludge (AREA)
Abstract
PURPOSE: To provide an easy dehydrating treatment by setting froth retaining time longer than specified value of layer thickness to thereby stabilize the accumulation of froth.
CONSTITUTION: Solid in sludge is adhered to fine bubbles generated upon reduction of pressure in gas solved pressure water to be thus floated and to be accumulated as froth. The froth is gradually scraped to be removed by a floating concentration process. The thickness of the froth layer is retained thicker than 500mm, and the scraping frequency of the froth is set to once per hour to once per 24 hours to stabilize the accumulation of the froth. Then, gas solid ratio is set higher than 15 liter air/kg solid as shown in graphs to thereby obtain stable froth concentration. High froth cencentration can be obtained when the solid load is less than 120kg solid/m2 day is as shown in the graph.
COPYRIGHT: (C)1979,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP52147476A JPS5913277B2 (en) | 1977-12-08 | 1977-12-08 | Sludge flotation concentration method |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP52147476A JPS5913277B2 (en) | 1977-12-08 | 1977-12-08 | Sludge flotation concentration method |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS5479953A true JPS5479953A (en) | 1979-06-26 |
JPS5913277B2 JPS5913277B2 (en) | 1984-03-28 |
Family
ID=15431241
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP52147476A Expired JPS5913277B2 (en) | 1977-12-08 | 1977-12-08 | Sludge flotation concentration method |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5913277B2 (en) |
-
1977
- 1977-12-08 JP JP52147476A patent/JPS5913277B2/en not_active Expired
Also Published As
Publication number | Publication date |
---|---|
JPS5913277B2 (en) | 1984-03-28 |
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