JPS6447499A - Treatment of organic sewage - Google Patents
Treatment of organic sewageInfo
- Publication number
- JPS6447499A JPS6447499A JP62200944A JP20094487A JPS6447499A JP S6447499 A JPS6447499 A JP S6447499A JP 62200944 A JP62200944 A JP 62200944A JP 20094487 A JP20094487 A JP 20094487A JP S6447499 A JPS6447499 A JP S6447499A
- Authority
- JP
- Japan
- Prior art keywords
- slurry
- stage
- membrane
- treatment
- calcium phosphate
- 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
- 239000010865 sewage Substances 0.000 title abstract 3
- 239000002002 slurry Substances 0.000 abstract 5
- 239000012528 membrane Substances 0.000 abstract 3
- 239000010802 sludge Substances 0.000 abstract 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract 3
- 239000011575 calcium Substances 0.000 abstract 2
- 238000000926 separation method Methods 0.000 abstract 2
- QORWJWZARLRLPR-UHFFFAOYSA-H tricalcium bis(phosphate) Chemical compound [Ca+2].[Ca+2].[Ca+2].[O-]P([O-])([O-])=O.[O-]P([O-])([O-])=O QORWJWZARLRLPR-UHFFFAOYSA-H 0.000 abstract 2
- 229910000389 calcium phosphate Inorganic materials 0.000 abstract 1
- 239000001506 calcium phosphate Substances 0.000 abstract 1
- 235000011010 calcium phosphates Nutrition 0.000 abstract 1
Landscapes
- Separation Of Suspended Particles By Flocculating Agents (AREA)
- Purification Treatments By Anaerobic Or Anaerobic And Aerobic Bacteria Or Animals (AREA)
- Separation Using Semi-Permeable Membranes (AREA)
Abstract
PURPOSE:To obtain advanced treated water by treating org. sewage in a biological nitrifying-denitrifying stage, adding Ca<2+> to the resulting slurry of activated sludge and carrying out separation with a membrane. CONSTITUTION:Raw sewage 1 is fed to a biological nitrifying-denitrifying stage 2 and treated. Ca<2+> 3 is added to a slurry of activated sludge flowing out of the stage 2 to produce calcium phosphate. The resulting slurry 4 contg. precipitated calcium phosphate having adsorbed COD components is sent to a membrane separating stage 5, where separation with a membrane is carried out to separate permeated water 6 from a slurry 7. The slurry 7 is recycled as return sludge and a small amt. of Fe<3+> is added to the permeated water 6 to flocculate and separate the residue. Thus, the cost of treatment can be considerably reduced.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62200944A JPH0632831B2 (en) | 1987-08-13 | 1987-08-13 | Organic wastewater treatment method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62200944A JPH0632831B2 (en) | 1987-08-13 | 1987-08-13 | Organic wastewater treatment method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6447499A true JPS6447499A (en) | 1989-02-21 |
| JPH0632831B2 JPH0632831B2 (en) | 1994-05-02 |
Family
ID=16432895
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP62200944A Expired - Lifetime JPH0632831B2 (en) | 1987-08-13 | 1987-08-13 | Organic wastewater treatment method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0632831B2 (en) |
-
1987
- 1987-08-13 JP JP62200944A patent/JPH0632831B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0632831B2 (en) | 1994-05-02 |
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