GB1432667A - Waste water treatment - Google Patents

Waste water treatment

Info

Publication number
GB1432667A
GB1432667A GB3381773A GB3381773A GB1432667A GB 1432667 A GB1432667 A GB 1432667A GB 3381773 A GB3381773 A GB 3381773A GB 3381773 A GB3381773 A GB 3381773A GB 1432667 A GB1432667 A GB 1432667A
Authority
GB
United Kingdom
Prior art keywords
stage
zones
product
sludge
liquor
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
GB3381773A
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.)
South African Inventions Development Corp
Original Assignee
South African Inventions Development Corp
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 South African Inventions Development Corp filed Critical South African Inventions Development Corp
Publication of GB1432667A publication Critical patent/GB1432667A/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
    • C02F3/30—Aerobic and anaerobic processes
    • C02F3/308—Biological phosphorus removal
    • 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
    • C02F3/1205—Particular type of activated sludge processes
    • C02F3/1215—Combinations of activated sludge treatment with precipitation, flocculation, coagulation and separation of phosphates
    • 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
    • C02F3/1236—Particular type of activated sludge installations
    • C02F3/1257—Oxidation ditches
    • 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

1432667 Activated sludge process SOUTH AFRICAN INVENTIONS DEVELOPMENT CORP 16 July 1973 [4 Aug 1972] 33817/73 Heading C1C A 4- or 5-stage activated sludge process for removing nitrogen (and possibly phosphates) from organic waste water (e.g. sewage) comprises: (1) mixing the influent water with recycled liquor from stage 2 and recycled sludge from stage 5 and applying anaerobic or slightly aerobic conditions, preferably at a pH of at least 6À2 to effect bacterial denitrification; (2) aerating the product from stage 1 (optionally in admixture with further sludge recycled from stage 5) to effect bacterial nitrification; (3) subjecting the product from stage 2 (optionally in admixture with a carbon source, e.g. methanol) to anaerobic or slightly aerobic conditions to effect bacterial denitrification; (4) optionally aerating the product from stage 3 with the possible result of nitrification and/or phosphate precipitation; and (5) separating the product from stage 3 or 4 into activated sludge and clarified effluent. At any stage of the process, the liquor or sludge may be treated with time, alum, aluminate or iron slats to effect phosphate removal. Fig. 3 shows stages 1-5 of the above process being effected in zones 14.3, 16.3, 18.3, 20.3 and 22.3 respectively, where zones 16.3 and 20.3 are concentric endless annular channels through which the liquor is propelled by the rotation of surface aeration discs 44; and zones 14.3 and 18.3 have stirrers 36.3. Fig. 4 (not shown) is similar to Fig. 3 but with three central zones and only one annular channel. Fig. 5 (not shown) shows stages 1-4 being effected in adjoining rectangular tanks (with surface or submerged aeration for stages 2 and 4) and a separate -circular clarifier for stage 5. Fig. 2 (not shown) is a diagrammatic flow sheet.
GB3381773A 1972-08-04 1973-07-16 Waste water treatment Expired GB1432667A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
ZA725371A ZA725371B (en) 1972-08-04 1972-08-04 Improvements in and relating to waste water treatment

Publications (1)

Publication Number Publication Date
GB1432667A true GB1432667A (en) 1976-04-22

Family

ID=25565226

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3381773A Expired GB1432667A (en) 1972-08-04 1973-07-16 Waste water treatment

Country Status (6)

Country Link
JP (1) JPS4964259A (en)
AU (1) AU473753B2 (en)
DE (1) DE2339557B2 (en)
FR (1) FR2194658B1 (en)
GB (1) GB1432667A (en)
ZA (1) ZA725371B (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0220142A1 (en) * 1985-09-16 1987-04-29 Boliden Aktiebolag A sewage-water purifying process
DE102008005412A1 (en) * 2008-01-21 2009-07-23 Horn, Martin, Dipl.-Ing. In-situ neutralization of sulfuric acid-containing opencast mine water e.g. edge tube water, comprises introducing partial supply of opencast mine water from water into first basin closed against outer oxygen-containing air atmosphere

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3994802A (en) * 1975-04-16 1976-11-30 Air Products And Chemicals, Inc. Removal of BOD and nitrogenous pollutants from wastewaters
JPS51122946A (en) * 1975-04-18 1976-10-27 Ebara Infilco Co Ltd Process for treating sewages
JPS51122945A (en) * 1975-04-18 1976-10-27 Ebara Infilco Co Ltd Process for treating waste water
US4056465A (en) * 1976-04-12 1977-11-01 Air Products And Chemicals, Inc. Production of non-bulking activated sludge
FR2364184A1 (en) * 1976-09-13 1978-04-07 Vysoka Skola Chem Tech Purifying waste water of high organic content - first acid anaerobic, then aerobic, then anaerobic methane fermentations
JPS5335256A (en) * 1976-09-14 1978-04-01 Hitachi Kiden Kogyo Ltd Waste water treating method
JPS5392551A (en) * 1977-01-24 1978-08-14 Ataka Kensetsu Kougiyou Kk Method of treating waste water
JPS53125359A (en) * 1977-04-06 1978-11-01 Niigata Eng Co Ltd Method of removing nitrogen in waste water by non woven web plate
JPS54162846A (en) * 1978-06-15 1979-12-24 Bera Arekusuiibuna Guberunator Biological sewage disposal method
DE2908134C2 (en) * 1979-03-02 1983-10-20 Böhnke, Botho, Prof. Dr.-Ing., 5100 Aachen Plant for the purification of wastewater
JPS56161892A (en) * 1980-05-17 1981-12-12 Hiroshi Kishi Unstationary active sludge process
CN115010260A (en) * 2022-08-09 2022-09-06 广东北控环保装备有限公司 Water treatment equipment

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2049488A5 (en) * 1969-06-11 1971-03-26 South African Inventions Division of agitated sewage between settling and aeration - zones

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0220142A1 (en) * 1985-09-16 1987-04-29 Boliden Aktiebolag A sewage-water purifying process
DE102008005412A1 (en) * 2008-01-21 2009-07-23 Horn, Martin, Dipl.-Ing. In-situ neutralization of sulfuric acid-containing opencast mine water e.g. edge tube water, comprises introducing partial supply of opencast mine water from water into first basin closed against outer oxygen-containing air atmosphere
DE102008005412B4 (en) * 2008-01-21 2012-08-23 Martin Horn Deacidification of sulphurous open-pit waters

Also Published As

Publication number Publication date
AU473753B2 (en) 1976-07-01
DE2339557A1 (en) 1974-02-21
AU5770973A (en) 1975-01-09
DE2339557B2 (en) 1976-09-30
JPS4964259A (en) 1974-06-21
FR2194658B1 (en) 1976-09-17
FR2194658A1 (en) 1974-03-01
ZA725371B (en) 1974-03-27

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Legal Events

Date Code Title Description
PS Patent sealed
PE20 Patent expired after termination of 20 years

Effective date: 19930715