GB1524172A - Process of dewatering sewage sludge - Google Patents
Process of dewatering sewage sludgeInfo
- Publication number
- GB1524172A GB1524172A GB529/77A GB52977A GB1524172A GB 1524172 A GB1524172 A GB 1524172A GB 529/77 A GB529/77 A GB 529/77A GB 52977 A GB52977 A GB 52977A GB 1524172 A GB1524172 A GB 1524172A
- Authority
- GB
- United Kingdom
- Prior art keywords
- sludge
- mixture
- acid
- sufficient
- water
- 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.)
- Expired
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F11/00—Treatment of sludge; Devices therefor
- C02F11/12—Treatment of sludge; Devices therefor by de-watering, drying or thickening
- C02F11/13—Treatment of sludge; Devices therefor by de-watering, drying or thickening by heating
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Treatment Of Sludge (AREA)
- Fertilizers (AREA)
- Separation Of Suspended Particles By Flocculating Agents (AREA)
Abstract
1524172 Dewatering sludge AGWAY Inc 7 Jan 1977 [9 Jan 1976] 00529/77 Headings C1C and C1B A non-compressible sewage sludge containing a known percentage by weight of water but no gaseous air phase is dewatered by mixing the sludge with a quantity of mineral acid or anhydride thereof sufficient to extract substantially all of the water initially contained in the sludge to form a mixture of sludge solids and dilute acid, and placing in a reaction vessel the mixture and a base of a type and quantity sufficient to react with the acid to generate a reaction heat sufficient to remove by evaporation a predetermined quantity of the water remaining in the mixture to allow formation, without filtration, of a granular product comprising sludge solids and a salt. The product has useful soil nutrient properties. The base is preferably ammonia, specified acids are sulphuric, sulphurous, phosphoric and phosphorous acids and specified acid anhydrides are sulphur dioxide and sulphur trioxide.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US05/647,739 US4038180A (en) | 1974-11-22 | 1976-01-09 | Process of dewatering sewage sludge |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1524172A true GB1524172A (en) | 1978-09-06 |
Family
ID=24598077
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB529/77A Expired GB1524172A (en) | 1976-01-09 | 1977-01-07 | Process of dewatering sewage sludge |
Country Status (3)
Country | Link |
---|---|
JP (1) | JPS52113048A (en) |
DE (1) | DE2700511A1 (en) |
GB (1) | GB1524172A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CZ308440B6 (en) * | 2019-09-12 | 2020-08-19 | ECOCOAL, s.r.o. | Method and device for processing sludges containing alkaline earth metal sulphates and sulphates |
-
1977
- 1977-01-07 DE DE19772700511 patent/DE2700511A1/en not_active Withdrawn
- 1977-01-07 GB GB529/77A patent/GB1524172A/en not_active Expired
- 1977-01-07 JP JP42477A patent/JPS52113048A/en active Pending
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CZ308440B6 (en) * | 2019-09-12 | 2020-08-19 | ECOCOAL, s.r.o. | Method and device for processing sludges containing alkaline earth metal sulphates and sulphates |
Also Published As
Publication number | Publication date |
---|---|
JPS52113048A (en) | 1977-09-21 |
DE2700511A1 (en) | 1977-07-21 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PS | Patent sealed [section 19, patents act 1949] | ||
PCNP | Patent ceased through non-payment of renewal fee |