JPS5791800A - Treatment for dehydrating coagulated and precipitated sludge - Google Patents
Treatment for dehydrating coagulated and precipitated sludgeInfo
- Publication number
- JPS5791800A JPS5791800A JP55165666A JP16566680A JPS5791800A JP S5791800 A JPS5791800 A JP S5791800A JP 55165666 A JP55165666 A JP 55165666A JP 16566680 A JP16566680 A JP 16566680A JP S5791800 A JPS5791800 A JP S5791800A
- Authority
- JP
- Japan
- Prior art keywords
- sludge
- coagulated
- precipitated
- acid
- dehydrating
- 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
- 239000010802 sludge Substances 0.000 title abstract 11
- 239000002253 acid Substances 0.000 abstract 7
- 239000002562 thickening agent Substances 0.000 abstract 3
- 239000000701 coagulant Substances 0.000 abstract 2
- 239000000203 mixture Substances 0.000 abstract 2
- 238000003756 stirring Methods 0.000 abstract 2
- 208000005156 Dehydration Diseases 0.000 abstract 1
- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical compound [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 abstract 1
- 239000000920 calcium hydroxide Substances 0.000 abstract 1
- 229910001861 calcium hydroxide Inorganic materials 0.000 abstract 1
- 235000011116 calcium hydroxide Nutrition 0.000 abstract 1
- 230000018044 dehydration Effects 0.000 abstract 1
- 238000006297 dehydration reaction Methods 0.000 abstract 1
- 229910052500 inorganic mineral Inorganic materials 0.000 abstract 1
- 239000007788 liquid Substances 0.000 abstract 1
- 238000000034 method Methods 0.000 abstract 1
- 239000011707 mineral Substances 0.000 abstract 1
- 235000010755 mineral Nutrition 0.000 abstract 1
- 238000001556 precipitation Methods 0.000 abstract 1
- 239000006228 supernatant Substances 0.000 abstract 1
Abstract
PURPOSE: To effectively dehydrate a coagulated and precipitated sludge in a simple operation by a method wherein an acid treated sludge comprising adding an acid to a part of the coagulated and precipitated sludge and a residual part of said coagulated and precipitated sludge to which a dehydrating aid is added are mixed and, thereafter, the resulting mixture is dehydrated.
CONSTITUTION: A coagulated and precipitated sludge 2 from a precipitation basin 1 is flowed into a primary thickener 3 to be precipitated and concentrated therein and a part of the obtained concentrated sludge 4 is introduced into an acid mixing tank 5 to add a mineral acid 6 thereto and the acid treated sludge 4' prepared therein by stirring is further concentrated in a secondary thickener 7 and a supernatant liquid is separated to be introduced into a mixing tank 9. To the residual concentrated sludge from the primary thickener 3, a dehydrating aic 10 is added and the obtained non-acid treated sludge 4" is introduced into the mixing tank 9 to be mixed with an appropriate amount of the acid treated sludge 4' under stirring and, thereafter, the resulting mixture is subjected to dehydration treatment in a dehydrator 11 such as a filter press or the like to discharge a dehydrated cake 12. As the aforementioned dehydrating aid, slaked lime, a org. high molecular coagulant, other inorg. coagulants can be used.
COPYRIGHT: (C)1982,JPO&Japio
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP55165666A JPS5791800A (en) | 1980-11-25 | 1980-11-25 | Treatment for dehydrating coagulated and precipitated sludge |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP55165666A JPS5791800A (en) | 1980-11-25 | 1980-11-25 | Treatment for dehydrating coagulated and precipitated sludge |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS5791800A true JPS5791800A (en) | 1982-06-08 |
Family
ID=15816701
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP55165666A Pending JPS5791800A (en) | 1980-11-25 | 1980-11-25 | Treatment for dehydrating coagulated and precipitated sludge |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5791800A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007196086A (en) * | 2006-01-24 | 2007-08-09 | Japan Organo Co Ltd | Concentration volume reduction process and arrangement of sludge |
| JP2009142744A (en) * | 2007-12-13 | 2009-07-02 | Matsuo Kiki Sangyo Kk | Sludge concentration method and sludge concentration apparatus |
-
1980
- 1980-11-25 JP JP55165666A patent/JPS5791800A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007196086A (en) * | 2006-01-24 | 2007-08-09 | Japan Organo Co Ltd | Concentration volume reduction process and arrangement of sludge |
| JP2009142744A (en) * | 2007-12-13 | 2009-07-02 | Matsuo Kiki Sangyo Kk | Sludge concentration method and sludge concentration apparatus |
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