GB1385822A - Activated sludge sewage treatment process and system - Google Patents

Activated sludge sewage treatment process and system

Info

Publication number
GB1385822A
GB1385822A GB1204572A GB1204572A GB1385822A GB 1385822 A GB1385822 A GB 1385822A GB 1204572 A GB1204572 A GB 1204572A GB 1204572 A GB1204572 A GB 1204572A GB 1385822 A GB1385822 A GB 1385822A
Authority
GB
United Kingdom
Prior art keywords
zone
oxygen
enclosed
aeration zone
gas
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.)
Expired
Application number
GB1204572A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Air Products and Chemicals Inc
Original Assignee
Air Products and Chemicals Inc
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Air Products and Chemicals Inc filed Critical Air Products and Chemicals Inc
Publication of GB1385822A publication Critical patent/GB1385822A/en
Expired legal-status Critical Current

Links

Classifications

    • 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
    • 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
    • C02F3/26—Activated sludge processes using pure oxygen or oxygen-rich gas
    • 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

Abstract

1385822 Activated sludge process AIR PRODUCTS & CHEMICALS Inc 15 March 1972 [18 March 1971 14 Feb 1972] 12045/72 Heading ClC An apparatus for treating waste liquid by the activated sludge process comprises an enclosed aeration zone to which is supplied oxygen-rich gas containing at least 35% oxygen, and an aeration zone which is open to the atmosphere and in which liquid is mixed with atmospheric air or oxygen-lean air. The enclosed aeration zone may comprise a chamber divided into subchambers by partitions of a number of interconnected separate chambers. The open aeration zone may comprise more than one chamber. In operation at least 25% of the biological oxygen demand of the liquid is satisfied in the enclosed aeration zone. The dissolved oxygen content is maintained at least 3 p.p.m. in at least part of the enclosed aeration zone. In Fig. 1 in enclosed aeration zone 12 waste liquid from line 16 and sludge recycled from settler 18 is mixed and aerated with oxygen-rich gas from source 51. Gas is removed from zone 12 and pumped through diffusers 56. Gas is vented from zone 12 under the control of valve 55 when the oxygen content of the gas in the zone is below a predetermined value. The waste liquid is subsequently aerated with atmospheric air in the zone provided with surface aerators 60 and settled in settler 18. The enclosed zone may be provided with surface aerators.
GB1204572A 1971-03-18 1972-03-15 Activated sludge sewage treatment process and system Expired GB1385822A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US12560271A 1971-03-18 1971-03-18
US22619972A 1972-02-14 1972-02-14

Publications (1)

Publication Number Publication Date
GB1385822A true GB1385822A (en) 1975-03-05

Family

ID=26823735

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1204572A Expired GB1385822A (en) 1971-03-18 1972-03-15 Activated sludge sewage treatment process and system

Country Status (8)

Country Link
AU (1) AU3954672A (en)
BE (1) BE780731A (en)
BR (1) BR7201577D0 (en)
DE (1) DE2212715A1 (en)
FR (1) FR2130406B1 (en)
GB (1) GB1385822A (en)
IT (1) IT965764B (en)
NL (1) NL7203628A (en)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2266661B1 (en) * 1974-04-05 1978-12-01 Degremont
DE2800035C2 (en) * 1978-01-02 1985-06-13 Passavant-Werke AG & Co KG, 6209 Aarbergen Process and device for wastewater purification
DE2800034C2 (en) * 1978-01-02 1984-01-05 Passavant-Werke AG & Co KG, 6209 Aarbergen Wastewater treatment process as well as the facility for its implementation
DE2816390C2 (en) * 1978-04-15 1983-10-06 Boehnke, Botho, Prof. Dr.-Ing., 5100 Aachen Plant for the treatment of wastewater according to the activated sludge process with several stabilization ditches
DE3045158A1 (en) * 1980-12-01 1982-07-01 Linde Ag, 6200 Wiesbaden METHOD AND DEVICE FOR BIOLOGICAL WASTE WATER TREATMENT
DE3150902A1 (en) * 1981-12-22 1983-06-30 Linde Ag, 6200 Wiesbaden Process and equipment for biological effluent treatment

Also Published As

Publication number Publication date
FR2130406B1 (en) 1977-09-02
NL7203628A (en) 1972-09-20
FR2130406A1 (en) 1972-11-03
IT965764B (en) 1974-02-11
DE2212715A1 (en) 1972-09-28
BR7201577D0 (en) 1973-06-14
AU3954672A (en) 1973-09-06
BE780731A (en) 1972-09-15

Similar Documents

Publication Publication Date Title
US3725258A (en) Activated sludge sewage treatment process and system
US3724667A (en) Activated sludge process and system
GB1418584A (en) Process and apparatus for treatment of waste water
ES381325A1 (en) Biochemical oxidation with low sludge recycle
GB1149656A (en) Sewage treatment system
GB1404565A (en) Method of biological purification of sewage and plant for carrying out the method
ES436358A1 (en) Treatment of sewage
GB1438749A (en) Wastewater treatiment system with controlled mixing
GB1434816A (en) Method and apparatus for the purification of aqueous effluent
GB1385822A (en) Activated sludge sewage treatment process and system
GB1446274A (en) Purification of organically pollutet aqueous liquids
MY111432A (en) Method for treatment of waste water by activated sludge process
US4430224A (en) Process and apparatus for biologically treating waste waters
GB1149511A (en) Improvements in or relating to sewage treatment
GB1362045A (en) Methods of sewage disposal
GB1348658A (en) Method of treating waste water
GB2057415A (en) A pressurized aerating system for treating waste materials active sludge
GB1375394A (en)
GB1424801A (en) Process and system for treating waste water
JPS571491A (en) Disposal of sewage
GB1435663A (en) Plants for the biological treatment of liquid suspensions containing oxidizable matters
FR2311758A1 (en) Highly efficient aerating system - for an activated sludge effluent treatment plant, with restricted liquid circulation in aerating tank
GB1496069A (en) Method for the biological purification of effluent and the plant for carrying out the process
GB1461865A (en) Aqueous waste treatment purification process
ES456300A1 (en) Method of and apparatus for separating gas from liquid during treatment of waste liquid

Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PCNP Patent ceased through non-payment of renewal fee