SE8604357D0 - PROCEDURE FOR BIOSLAM HEAT TREATMENT - Google Patents
PROCEDURE FOR BIOSLAM HEAT TREATMENTInfo
- Publication number
- SE8604357D0 SE8604357D0 SE8604357A SE8604357A SE8604357D0 SE 8604357 D0 SE8604357 D0 SE 8604357D0 SE 8604357 A SE8604357 A SE 8604357A SE 8604357 A SE8604357 A SE 8604357A SE 8604357 D0 SE8604357 D0 SE 8604357D0
- Authority
- SE
- Sweden
- Prior art keywords
- sludge
- heat treatment
- treatment
- conventional heat
- temperature
- Prior art date
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
- C02F11/18—Treatment of sludge; Devices therefor by thermal conditioning
Landscapes
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Treatment Of Sludge (AREA)
- Paper (AREA)
Abstract
Process for the heat treatment of a biological sludge in which the pH of the sludge is adjusted to a value of between 3.0 and 4.5 and the sludge is then treated in a reactor 3 at a temperature which is lower than the temperature of conventional heat treatment of biological sludge at 110-150 DEG C and at a pressure which is lower than that of the conventional heat treatment. The dehydration properties of the sludge are appreciably improved in the treatment. As a result of the low pressure, the energy of a backpressure steam in the temperature range 110-130 DEG C can be employed for heating the sludge. It is further possible to improve the treatment by adding to the sludge a chemical substance acting as an oxidising agent. Less organic matter is dissolved in the process and more nutrient substances in relation to the quantity of organic matter dissolved than in the conventional heat treatment. The nutrient substance economy of the purification equipment can be adjusted by changing the treatment conditions. <IMAGE>
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FI854034A FI854034L (en) | 1985-10-16 | 1985-10-16 | FOERFARANDE FOER VAERMEBEHANDLING AV BIOSLAM. |
Publications (2)
Publication Number | Publication Date |
---|---|
SE8604357D0 true SE8604357D0 (en) | 1986-10-15 |
SE8604357L SE8604357L (en) | 1987-04-17 |
Family
ID=8521519
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
SE8604357A SE8604357L (en) | 1985-10-16 | 1986-10-15 | PROCEDURE FOR BIOSLAM HEAT TREATMENT |
Country Status (4)
Country | Link |
---|---|
DE (1) | DE3635268A1 (en) |
FI (1) | FI854034L (en) |
FR (1) | FR2588549B3 (en) |
SE (1) | SE8604357L (en) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE4033342A1 (en) * | 1990-10-19 | 1992-04-23 | Oemv Deutschland Gmbh | Treating waste water contg. sludge - by addn. of hydrogen peroxide, oxidn. and distillation to remove volatiles |
CA2079400A1 (en) * | 1991-10-11 | 1993-04-12 | Geza L. Kovacs | Process for enhancing the dewaterability of waste sludge from microbiological digestion |
DE102010041582A1 (en) | 2010-09-29 | 2012-03-29 | Siemens Aktiengesellschaft | Combined method for disinfection, process for the treatment of sludge |
-
1985
- 1985-10-16 FI FI854034A patent/FI854034L/en not_active Application Discontinuation
-
1986
- 1986-10-15 SE SE8604357A patent/SE8604357L/en not_active Application Discontinuation
- 1986-10-15 FR FR8614324A patent/FR2588549B3/en not_active Expired
- 1986-10-16 DE DE19863635268 patent/DE3635268A1/en not_active Withdrawn
Also Published As
Publication number | Publication date |
---|---|
FI854034A0 (en) | 1985-10-16 |
FI854034L (en) | 1987-04-17 |
DE3635268A1 (en) | 1987-04-23 |
FR2588549A1 (en) | 1987-04-17 |
SE8604357L (en) | 1987-04-17 |
FR2588549B3 (en) | 1988-01-08 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
NAV | Patent application has lapsed |
Ref document number: 8604357-7 Effective date: 19890524 |