NL7316640A - Thickening activated sludge from effluent treatment plants - by dense media sedimentation in the presence of heavy particles - Google Patents
Thickening activated sludge from effluent treatment plants - by dense media sedimentation in the presence of heavy particlesInfo
- Publication number
- NL7316640A NL7316640A NL7316640A NL7316640A NL7316640A NL 7316640 A NL7316640 A NL 7316640A NL 7316640 A NL7316640 A NL 7316640A NL 7316640 A NL7316640 A NL 7316640A NL 7316640 A NL7316640 A NL 7316640A
- Authority
- NL
- Netherlands
- Prior art keywords
- heavy particles
- sludge
- thickening
- activated sludge
- treatment plants
- Prior art date
Links
- 239000002245 particle Substances 0.000 title abstract 6
- 239000010802 sludge Substances 0.000 title abstract 6
- 230000008719 thickening Effects 0.000 title abstract 2
- 238000004062 sedimentation Methods 0.000 title 1
- 229910000519 Ferrosilicon Inorganic materials 0.000 abstract 1
- 239000012141 concentrate Substances 0.000 abstract 1
- 230000005484 gravity Effects 0.000 abstract 1
- SZVJSHCCFOBDDC-UHFFFAOYSA-N iron(II,III) oxide Inorganic materials O=[Fe]O[Fe]O[Fe]=O SZVJSHCCFOBDDC-UHFFFAOYSA-N 0.000 abstract 1
- 239000000463 material Substances 0.000 abstract 1
- 239000004576 sand Substances 0.000 abstract 1
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
- C02F1/48—Treatment of water, waste water, or sewage with magnetic or electric fields
- C02F1/488—Treatment of water, waste water, or sewage with magnetic or electric fields for separation of magnetic materials, e.g. magnetic flocculation
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D21/00—Separation of suspended solid particles from liquids by sedimentation
- B01D21/01—Separation of suspended solid particles from liquids by sedimentation using flocculating agents
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D21/00—Separation of suspended solid particles from liquids by sedimentation
- B01D21/02—Settling tanks with single outlets for the separated liquid
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D21/00—Separation of suspended solid particles from liquids by sedimentation
- B01D21/24—Feed or discharge mechanisms for settling tanks
- B01D21/2427—The feed or discharge opening located at a distant position from the side walls
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D21/00—Separation of suspended solid particles from liquids by sedimentation
- B01D21/24—Feed or discharge mechanisms for settling tanks
- B01D21/2488—Feed or discharge mechanisms for settling tanks bringing about a partial recirculation of the liquid, e.g. for introducing chemical aids
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D21/00—Separation of suspended solid particles from liquids by sedimentation
- B01D21/26—Separation of sediment aided by centrifugal force or centripetal force
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Analytical Chemistry (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)
- Separation Of Suspended Particles By Flocculating Agents (AREA)
Abstract
The concn. of sludge, discharged from a biological effluent purifin. plant is increased by allowing the flocs of such sludge to settle in a reservoir in the presence of heavy particles introduced into the liq., then supplying the settled material to >=1 hydro-cyclone in which the sludge flocs are sepd. from the heavy particles which are recycled to the reservoir. System provides a simple technique for thickening sludges which settle only with difficulty and/or very slowly, enabling a concentrate to be obtd. suitable for e.g. centrifuging. The heavy particles pref. have a high specific gravity relative to the sludge flocs and a particle size of 10-100 mu, and may consist of magnetite, ferrosilicon, suitable types of sand or loess. The concn. of heavy particles used to entrain the sludge is pref. 25 g/1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| NL7316640A NL7316640A (en) | 1973-12-05 | 1973-12-05 | Thickening activated sludge from effluent treatment plants - by dense media sedimentation in the presence of heavy particles |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| NL7316640A NL7316640A (en) | 1973-12-05 | 1973-12-05 | Thickening activated sludge from effluent treatment plants - by dense media sedimentation in the presence of heavy particles |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| NL7316640A true NL7316640A (en) | 1975-06-09 |
Family
ID=19820134
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| NL7316640A NL7316640A (en) | 1973-12-05 | 1973-12-05 | Thickening activated sludge from effluent treatment plants - by dense media sedimentation in the presence of heavy particles |
Country Status (1)
| Country | Link |
|---|---|
| NL (1) | NL7316640A (en) |
-
1973
- 1973-12-05 NL NL7316640A patent/NL7316640A/en unknown
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