GB1445218A - Dewatering process for sewage sludges containing biological solids - Google Patents
Dewatering process for sewage sludges containing biological solidsInfo
- Publication number
- GB1445218A GB1445218A GB3399574A GB3399574A GB1445218A GB 1445218 A GB1445218 A GB 1445218A GB 3399574 A GB3399574 A GB 3399574A GB 3399574 A GB3399574 A GB 3399574A GB 1445218 A GB1445218 A GB 1445218A
- Authority
- GB
- United Kingdom
- Prior art keywords
- per cent
- mol per
- sewage sludges
- solids
- dewatering process
- 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
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
- C02F1/54—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using organic material
-
- 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
- C02F11/14—Treatment of sludge; Devices therefor by de-watering, drying or thickening with addition of chemical agents
- C02F11/147—Treatment of sludge; Devices therefor by de-watering, drying or thickening with addition of chemical agents using organic substances
Landscapes
- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Treatment Of Sludge (AREA)
- Separation Of Suspended Particles By Flocculating Agents (AREA)
Abstract
1445218 Dewatering sewage sludges HERCULES Inc 1 Aug 1974 [2 Aug 1973 2 Oct 1973] 33995/74 Heading C1C [Also in Division C3P] Sewage sludges containing 0À5 to 10% solids, at least 30% of which are biological, are dewatered by mixing with a copolymer of acrylamide and #-methacryloyloxyethyltrimethylammonium chloride having a reduced specific viscosity of at least 15, as measured at 0À1% concentration in 0À1 N KCl solution; the slurry formed is then dewatered, preferably by vacuum filtration or centrifuging Preferred copolymers contain 15-90 mol per cent, particularly 25- 50 mol per cent, of #-methyacryloyloxyethyltrimethylammonium chloride and 85-10 mol per cent, particularly 75-50 mol per cent, of acrylamide. The quantity of copolymer used is preferably 2-20 pounds/ton of sludge solids on a dry basis.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US38488073A | 1973-08-02 | 1973-08-02 | |
| US40269673A | 1973-10-02 | 1973-10-02 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1445218A true GB1445218A (en) | 1976-08-04 |
Family
ID=27010799
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB3399574A Expired GB1445218A (en) | 1973-08-02 | 1974-08-01 | Dewatering process for sewage sludges containing biological solids |
Country Status (7)
| Country | Link |
|---|---|
| JP (1) | JPS5050270A (en) |
| BE (1) | BE818436A (en) |
| FI (1) | FI200074A (en) |
| FR (1) | FR2239428A1 (en) |
| GB (1) | GB1445218A (en) |
| IT (1) | IT1025033B (en) |
| SE (1) | SE7409774L (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3129136A1 (en) * | 1980-10-15 | 1982-06-09 | Upravlenie vodoprovodno-kanalizacionnogo chozjajstva, Leningrad | Process for conditioning waste water sludges |
| DE3131411A1 (en) * | 1980-08-08 | 1982-06-24 | Kurita Water Industries Ltd., Osaka | METHOD FOR DRAINING SLUDGE |
| EP0074776A2 (en) * | 1981-09-08 | 1983-03-23 | Betz Europe, Inc. | Process of treating bio-sludge |
-
1974
- 1974-06-28 FI FI2000/74*A patent/FI200074A/fi unknown
- 1974-07-09 JP JP49078654A patent/JPS5050270A/ja active Pending
- 1974-07-29 SE SE7409774A patent/SE7409774L/xx unknown
- 1974-08-01 IT IT25871/74A patent/IT1025033B/en active
- 1974-08-01 GB GB3399574A patent/GB1445218A/en not_active Expired
- 1974-08-02 BE BE147239A patent/BE818436A/en unknown
- 1974-08-02 FR FR7427661A patent/FR2239428A1/fr not_active Withdrawn
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3131411A1 (en) * | 1980-08-08 | 1982-06-24 | Kurita Water Industries Ltd., Osaka | METHOD FOR DRAINING SLUDGE |
| DE3129136A1 (en) * | 1980-10-15 | 1982-06-09 | Upravlenie vodoprovodno-kanalizacionnogo chozjajstva, Leningrad | Process for conditioning waste water sludges |
| EP0074776A2 (en) * | 1981-09-08 | 1983-03-23 | Betz Europe, Inc. | Process of treating bio-sludge |
| EP0074776A3 (en) * | 1981-09-08 | 1984-10-03 | Betz Europe, Inc. | Process of treating bio-sludge |
Also Published As
| Publication number | Publication date |
|---|---|
| SE7409774L (en) | 1975-02-03 |
| AU7187574A (en) | 1976-02-05 |
| FI200074A (en) | 1975-02-13 |
| BE818436A (en) | 1974-12-02 |
| IT1025033B (en) | 1978-08-10 |
| JPS5050270A (en) | 1975-05-06 |
| FR2239428A1 (en) | 1975-02-28 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| 414F | Notice of opposition given (sect. 14/1949) | ||
| 414E | Application relinquished (sect. 14/1949) | ||
| CSNS | Application of which complete specification have been accepted and published, but patent is not sealed |