FR2416199A1 - PROCESS FOR THE SECONDARY TREATMENT OF WASTEWATER - Google Patents
PROCESS FOR THE SECONDARY TREATMENT OF WASTEWATERInfo
- Publication number
- FR2416199A1 FR2416199A1 FR7902456A FR7902456A FR2416199A1 FR 2416199 A1 FR2416199 A1 FR 2416199A1 FR 7902456 A FR7902456 A FR 7902456A FR 7902456 A FR7902456 A FR 7902456A FR 2416199 A1 FR2416199 A1 FR 2416199A1
- Authority
- FR
- France
- Prior art keywords
- wastewater
- secondary treatment
- bacteria
- food
- microorganism ratio
- 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
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
- C02F1/24—Treatment of water, waste water, or sewage by flotation
-
- 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
- Life Sciences & Earth Sciences (AREA)
- Organic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Chemical & Material Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Biodiversity & Conservation Biology (AREA)
- Microbiology (AREA)
- Activated Sludge Processes (AREA)
- Physical Water Treatments (AREA)
- Biological Treatment Of Waste Water (AREA)
- Purification Treatments By Anaerobic Or Anaerobic And Aerobic Bacteria Or Animals (AREA)
Abstract
L'invention concerne un procédé pour le traitement secondaire d'eaux usées. Ce procédé consiste à aérer l'eau usée contenant des bactéries dans un réservoir d'aération jusqu'à ce que le niveau de demande biochimique en oxygène soit sensiblement réduit, le rapport nourriture sur micro-organisme étant supérieur à un, à introduire l'eau usée aérée sous pression dans un clarificateur par flottation pour séparer les solides en suspension y compris les bactéries à recycler lesdits solides et bactéries vers l'étape d'aération en quantité suffisante pour maintenir le rapport nourriture sur micro-organisme et à enlever l'eau usée restante à DBO réduite. L'invention s'applique au traitement secondaire d'effluents d'usine de pâte au sulfite.The invention relates to a method for the secondary treatment of wastewater. This process consists of aerating the wastewater containing bacteria in an aeration tank until the level of biochemical oxygen demand is significantly reduced, the food to microorganism ratio being greater than one, introducing the aerated waste water under pressure in a flotation clarifier to separate suspended solids including bacteria to recycle said solids and bacteria to the aeration step in sufficient quantity to maintain the food to microorganism ratio and to remove the wastewater remaining with reduced BOD. The invention applies to the secondary treatment of sulphite pulp mill effluents.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US87532778A | 1978-02-06 | 1978-02-06 |
Publications (2)
Publication Number | Publication Date |
---|---|
FR2416199A1 true FR2416199A1 (en) | 1979-08-31 |
FR2416199B1 FR2416199B1 (en) | 1984-10-26 |
Family
ID=25365605
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR7902456A Granted FR2416199A1 (en) | 1978-02-06 | 1979-01-31 | PROCESS FOR THE SECONDARY TREATMENT OF WASTEWATER |
Country Status (7)
Country | Link |
---|---|
JP (1) | JPS54113962A (en) |
CA (1) | CA1117669A (en) |
DE (1) | DE2903548A1 (en) |
FI (1) | FI790165A (en) |
FR (1) | FR2416199A1 (en) |
GB (1) | GB2013646B (en) |
SE (1) | SE7900866L (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 |
Families Citing this family (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3028336C2 (en) * | 1980-07-25 | 1985-08-01 | Wilhelm Roediger Gmbh + Co, 6450 Hanau | Process for the biological purification of waste water |
SE443930B (en) * | 1981-05-08 | 1986-03-17 | Flaekt Ab | DEVICE FOR PURIFICATION OF POLLUTANEATED AIR FROM A SPRAYBOX WITH A BIOLOGICAL DEGRADATION |
NL8204829A (en) * | 1982-12-14 | 1984-07-02 | Schneider & Schuurman | METHOD AND APPARATUS FOR PURIFICATION OF WASTE WATER. |
JPS6078696A (en) * | 1983-10-04 | 1985-05-04 | Shinryo Air Conditioning Co Ltd | Svi improvement of liquid mixture in aeration tank |
GB8607854D0 (en) * | 1986-03-27 | 1986-04-30 | Cjb Developments Ltd | Gas flotation system |
FR2700323B1 (en) * | 1993-01-14 | 1995-03-31 | Cee Qua Bio | Method of biological water treatment and device implementing the method. |
DE19848346C2 (en) * | 1998-10-21 | 2001-09-13 | Mueller Blanke Norbert | Flotation process for the retention of biomass-forming microorganisms suspended in water in a basin |
WO2010058434A1 (en) * | 2008-11-24 | 2010-05-27 | Hawk Partners Sas | Vertical rector digestor for biological sludges |
US11155484B2 (en) * | 2018-04-20 | 2021-10-26 | Advanced Biological Services, Inc. | Systems and methods for treating wastewater and providing class A sludge |
CN110468033B (en) | 2019-08-26 | 2020-12-08 | 同济大学 | Anaerobic digestion device for strengthening methane production by utilizing self-sustaining air flotation |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR1478749A (en) * | 1965-04-29 | 1967-04-28 | Purac Ab | Process for purifying water by means of a plurality of treatments applied in series |
DE2111442A1 (en) * | 1970-06-29 | 1972-01-05 | Aquanox Inc | Effluent treatment - by high pressure aerobic decomposition |
FR2116662A5 (en) * | 1970-12-02 | 1972-07-21 | Degremont | |
FR2285346A1 (en) * | 1973-01-24 | 1976-04-16 | Air Prod & Chem | IMPROVEMENTS TO ACTIVATED SLUDGE PROCESSES WITHOUT GROUND TAKING |
FR2306745A1 (en) * | 1975-04-07 | 1976-11-05 | Ici Ltd | METHOD AND APPARATUS FOR SEPARATING LIQUID AND SOLID MATERIALS FOR THE TREATMENT OF SEWWATER |
Family Cites Families (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS51139173A (en) * | 1975-05-27 | 1976-12-01 | Nitto Chem Ind Co Ltd | Activated sludge treatment |
-
1979
- 1979-01-18 FI FI790165A patent/FI790165A/en unknown
- 1979-01-30 GB GB7903226A patent/GB2013646B/en not_active Expired
- 1979-01-31 FR FR7902456A patent/FR2416199A1/en active Granted
- 1979-01-31 DE DE19792903548 patent/DE2903548A1/en not_active Withdrawn
- 1979-02-01 SE SE7900866A patent/SE7900866L/en not_active Application Discontinuation
- 1979-02-06 CA CA000320880A patent/CA1117669A/en not_active Expired
- 1979-02-06 JP JP1274379A patent/JPS54113962A/en active Pending
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR1478749A (en) * | 1965-04-29 | 1967-04-28 | Purac Ab | Process for purifying water by means of a plurality of treatments applied in series |
DE2111442A1 (en) * | 1970-06-29 | 1972-01-05 | Aquanox Inc | Effluent treatment - by high pressure aerobic decomposition |
FR2116662A5 (en) * | 1970-12-02 | 1972-07-21 | Degremont | |
FR2285346A1 (en) * | 1973-01-24 | 1976-04-16 | Air Prod & Chem | IMPROVEMENTS TO ACTIVATED SLUDGE PROCESSES WITHOUT GROUND TAKING |
FR2306745A1 (en) * | 1975-04-07 | 1976-11-05 | Ici Ltd | METHOD AND APPARATUS FOR SEPARATING LIQUID AND SOLID MATERIALS FOR THE TREATMENT OF SEWWATER |
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 |
---|---|
FI790165A (en) | 1979-08-07 |
GB2013646A (en) | 1979-08-15 |
FR2416199B1 (en) | 1984-10-26 |
DE2903548A1 (en) | 1979-08-09 |
JPS54113962A (en) | 1979-09-05 |
CA1117669A (en) | 1982-02-02 |
GB2013646B (en) | 1982-07-21 |
SE7900866L (en) | 1979-08-07 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
ST | Notification of lapse |