FR2364861A1 - PROCESS FOR THE PERFORMANCE OF THE BIOLOGICAL TREATMENT OF WASTEWATER - Google Patents
PROCESS FOR THE PERFORMANCE OF THE BIOLOGICAL TREATMENT OF WASTEWATERInfo
- Publication number
- FR2364861A1 FR2364861A1 FR7727986A FR7727986A FR2364861A1 FR 2364861 A1 FR2364861 A1 FR 2364861A1 FR 7727986 A FR7727986 A FR 7727986A FR 7727986 A FR7727986 A FR 7727986A FR 2364861 A1 FR2364861 A1 FR 2364861A1
- Authority
- FR
- France
- Prior art keywords
- sludge
- phase
- wastewater
- oxygen addition
- addition stage
- 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.)
- Granted
Links
- 239000002351 wastewater Substances 0.000 title abstract 3
- 238000000034 method Methods 0.000 title abstract 2
- 239000010802 sludge Substances 0.000 abstract 9
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 abstract 4
- 229910052760 oxygen Inorganic materials 0.000 abstract 4
- 239000001301 oxygen Substances 0.000 abstract 4
- 239000012071 phase Substances 0.000 abstract 3
- 239000007788 liquid Substances 0.000 abstract 2
- 239000007791 liquid phase Substances 0.000 abstract 2
- 238000000926 separation method Methods 0.000 abstract 2
- 238000005352 clarification Methods 0.000 abstract 1
- 238000000746 purification Methods 0.000 abstract 1
- 239000000126 substance Substances 0.000 abstract 1
- 230000008719 thickening Effects 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
- C02F1/38—Treatment of water, waste water, or sewage by centrifugal separation
- C02F1/385—Treatment of water, waste water, or sewage by centrifugal separation by centrifuging suspensions
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/02—Aerobic processes
- C02F3/12—Activated sludge processes
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W10/00—Technologies for wastewater treatment
- Y02W10/10—Biological treatment of water, waste water, or sewage
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Water Supply & Treatment (AREA)
- Hydrology & Water Resources (AREA)
- Environmental & Geological Engineering (AREA)
- Organic Chemistry (AREA)
- Microbiology (AREA)
- Biodiversity & Conservation Biology (AREA)
- Analytical Chemistry (AREA)
- Mechanical Engineering (AREA)
- Activated Sludge Processes (AREA)
- Physical Water Treatments (AREA)
- Centrifugal Separators (AREA)
- Treatment Of Sludge (AREA)
Abstract
L'épuration biologique des eaux usées est effectuée selon la technique des boues activées, consistant à introduire les eaux usées dans au moins un étage d'addition d'oxygène, d'où un effluent liquide ayant une concentration de boues relativement faible est acheminé vers un groupe de séparation des boues qui est équipé de moyens pour renvoyer des boues extraites dans l'étage d'addition d'oxygène. L'effluent liquide de l'étage d'addition d'oxygène 1 est introduit dans un dispositif d'epaississement des boues 3 faisant partie du groupe de séparation des boues 2, où il est divisé d'une part en une phase de boues ayant une concentration relativement élevée de substances sèches, c'est-à-dire d'au moins 2 %, une fraction au moins de cette phase étant renvoyée dans l'étage d'addition d'oxygène 1 et, d'autre part, en une phase liquide qui est pratiquement dépourvue de boues, phase qui est envoyée dans un étage de clarification 4 où les boues résiduelles sont extraites de la phase liquide.Biological purification of wastewater is carried out using the activated sludge technique, which consists of introducing the wastewater into at least one oxygen addition stage, from which a liquid effluent having a relatively low sludge concentration is conveyed to a sludge separation unit which is equipped with means for returning the extracted sludge to the oxygen addition stage. The liquid effluent from the oxygen addition stage 1 is introduced into a sludge thickening device 3 forming part of the sludge separation group 2, where it is divided on the one hand into a sludge phase having a relatively high concentration of dry substances, that is to say at least 2%, at least a fraction of this phase being returned to the oxygen addition stage 1 and, on the other hand, in a liquid phase which is practically free of sludge, which phase is sent to a clarification stage 4 where the residual sludge is extracted from the liquid phase.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SE7610325A SE7610325L (en) | 1976-09-17 | 1976-09-17 | PROCEDURE FOR CARRYING OUT BIOLOGICAL WASTE WATER TREATMENT |
Publications (2)
Publication Number | Publication Date |
---|---|
FR2364861A1 true FR2364861A1 (en) | 1978-04-14 |
FR2364861B1 FR2364861B1 (en) | 1980-04-30 |
Family
ID=20328905
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR7727986A Granted FR2364861A1 (en) | 1976-09-17 | 1977-09-16 | PROCESS FOR THE PERFORMANCE OF THE BIOLOGICAL TREATMENT OF WASTEWATER |
Country Status (6)
Country | Link |
---|---|
CA (1) | CA1084179A (en) |
DE (1) | DE2741021A1 (en) |
FR (1) | FR2364861A1 (en) |
GB (1) | GB1563160A (en) |
IT (1) | IT1087506B (en) |
SE (1) | SE7610325L (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2505314A1 (en) * | 1981-05-07 | 1982-11-12 | Shinryo Air Cond | METHOD FOR IMPROVING THE VOLUME INDEX OF MIXED LIQUOR MUD IN A VENTILATION BASIN |
-
1976
- 1976-09-17 SE SE7610325A patent/SE7610325L/en unknown
-
1977
- 1977-09-12 DE DE19772741021 patent/DE2741021A1/en not_active Withdrawn
- 1977-09-12 IT IT2745777A patent/IT1087506B/en active
- 1977-09-12 GB GB37954/77A patent/GB1563160A/en not_active Expired
- 1977-09-16 FR FR7727986A patent/FR2364861A1/en active Granted
- 1977-09-16 CA CA286,948A patent/CA1084179A/en not_active Expired
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2505314A1 (en) * | 1981-05-07 | 1982-11-12 | Shinryo Air Cond | METHOD FOR IMPROVING THE VOLUME INDEX OF MIXED LIQUOR MUD IN A VENTILATION BASIN |
Also Published As
Publication number | Publication date |
---|---|
GB1563160A (en) | 1980-03-19 |
IT1087506B (en) | 1985-06-04 |
FR2364861B1 (en) | 1980-04-30 |
DE2741021A1 (en) | 1978-03-23 |
SE7610325L (en) | 1978-03-18 |
CA1084179A (en) | 1980-08-19 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
ST | Notification of lapse |