IT1109934B - Two-zone activated sludge tank to purify waste water - offers high efficiency treatment by repeated inter-zone transfer for intermittent aeration - Google Patents
Two-zone activated sludge tank to purify waste water - offers high efficiency treatment by repeated inter-zone transfer for intermittent aerationInfo
- Publication number
- IT1109934B IT1109934B IT1900779A IT1900779A IT1109934B IT 1109934 B IT1109934 B IT 1109934B IT 1900779 A IT1900779 A IT 1900779A IT 1900779 A IT1900779 A IT 1900779A IT 1109934 B IT1109934 B IT 1109934B
- Authority
- IT
- Italy
- Prior art keywords
- zone
- aerator
- liq
- tank
- partition
- Prior art date
Links
- 238000005273 aeration Methods 0.000 title 1
- 239000010802 sludge Substances 0.000 title 1
- 239000002351 wastewater Substances 0.000 title 1
- 238000005276 aerator Methods 0.000 abstract 5
- 238000005192 partition Methods 0.000 abstract 4
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 abstract 2
- 229910021529 ammonia Inorganic materials 0.000 abstract 1
- 238000000034 method Methods 0.000 abstract 1
- 150000002823 nitrates Chemical class 0.000 abstract 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract 1
Landscapes
- Aeration Devices For Treatment Of Activated Polluted Sludge (AREA)
Abstract
The tank is of the type in which the water is agitated by an aerator, e.g. a rotary impeller, The aerator is surrounded by a partition enclosing an inner zone of liq. and an annular outer zone of liq. is held between the partition and the outer wall of the tank. A passage is formed through the partition at or near surface level and another passage at or near tank base level. The aerator creates a flow of liq. through a passage from the inner zone to the outer zone. The transferred liq. circulates around the outer zone before finding its way back to the inner zone via a different passage. The passages are pref. formed and positioned and related to the direction of rotation of the aerator so that flow is outwards from the inner zone via upper passages and inwards from the outer zone via lower passages. The tank is pref. of vertical cylindrical form with a coaxial, vertical cylindrical partition around a central aerator. The treated effluent can be equal to that delivered from the conventional 3-stage process, i.e. free of ammonia and probably nitrates too. For such effective treatment the new plant is very compact and inexpensive.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| IT1900779A IT1109934B (en) | 1979-01-02 | 1979-01-02 | Two-zone activated sludge tank to purify waste water - offers high efficiency treatment by repeated inter-zone transfer for intermittent aeration |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| IT1900779A IT1109934B (en) | 1979-01-02 | 1979-01-02 | Two-zone activated sludge tank to purify waste water - offers high efficiency treatment by repeated inter-zone transfer for intermittent aeration |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| IT7919007A0 IT7919007A0 (en) | 1979-01-02 |
| IT1109934B true IT1109934B (en) | 1985-12-23 |
Family
ID=11153796
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| IT1900779A IT1109934B (en) | 1979-01-02 | 1979-01-02 | Two-zone activated sludge tank to purify waste water - offers high efficiency treatment by repeated inter-zone transfer for intermittent aeration |
Country Status (1)
| Country | Link |
|---|---|
| IT (1) | IT1109934B (en) |
-
1979
- 1979-01-02 IT IT1900779A patent/IT1109934B/en active
Also Published As
| Publication number | Publication date |
|---|---|
| IT7919007A0 (en) | 1979-01-02 |
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