GB587400A - Improvements in or relating to process of and apparatus for treating sewage and other waste liquors - Google Patents

Improvements in or relating to process of and apparatus for treating sewage and other waste liquors

Info

Publication number
GB587400A
GB587400A GB705444A GB705444A GB587400A GB 587400 A GB587400 A GB 587400A GB 705444 A GB705444 A GB 705444A GB 705444 A GB705444 A GB 705444A GB 587400 A GB587400 A GB 587400A
Authority
GB
United Kingdom
Prior art keywords
sewage
aerator
aeration zone
conduit
outlet
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
GB705444A
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.)
Infilco Inc
Original Assignee
Infilco 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 Infilco Inc filed Critical Infilco Inc
Publication of GB587400A publication Critical patent/GB587400A/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
    • C02F3/1205—Particular type of activated sludge processes
    • C02F3/121—Multistep treatment
    • 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)
  • Biodiversity & Conservation Biology (AREA)
  • Microbiology (AREA)
  • Hydrology & Water Resources (AREA)
  • Engineering & Computer Science (AREA)
  • Environmental & Geological Engineering (AREA)
  • Water Supply & Treatment (AREA)
  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Activated Sludge Processes (AREA)

Abstract

587,400. Treating sewage &c. INFILCO, Inc. April 17, 1944, No. 7054. Convention date, April 21, 1943. [Class 111] An activated sludge process of treating sewage and other waste liquors includes the steps of passing the sewage through an aeration zone, clarifying aerated sewage, discharging the clarified sewage to waste, returning bacterial solids separated from the clarified sewage to the aeration zone, and continuously mixing with the sewage entering the aeration zone unclarified aerated sewage taken from the outlet of the aeration zone in an amount controlled to produce a calculated time period for normal flow through the aeration zone. The amount of aerated sewage returned is preferably such that the time of flow of mixed liquor once through the aerator approximates to the time taken for the bacterial activity to reach its maximum. In the arrangement shown in Fig. 1, sewage after being partly purified in a primary clarifier 11, passes through conduit 15 to an aerator 16 containing air-diffusers 19. Baffles 21, 22 are provided to distribute the flow of sewage. The outlet pipe 23 is connected to a conduit 24 through which aerated sewage is recycled by a pump 25 back to the inlet 15 of the aerator. The pipe 23 also leads to a sedimentation chamber 28 from which clarified liquid is discharged through an outlet'35. Sludge is moved by raking mechanism 29 to an outlet 30, part of the sludge being discharged through a conduit 31 and part being returned by conduit 33 to the inlet end of the aerator. In a modification the aerator is divided by partitions into basins, each with a mechanical aerator. Fig. 5 shows respiration curves in which are compared the oxygen utilization of a conventional activated sludge plant (A) and a plant (D) in accordance with the invention, in the latter case sewage passing through the aerator in one hour, while due to recycling its total time in the aerator is three hours.
GB705444A 1943-04-21 1944-04-17 Improvements in or relating to process of and apparatus for treating sewage and other waste liquors Expired GB587400A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US587400XA 1943-04-21 1943-04-21

Publications (1)

Publication Number Publication Date
GB587400A true GB587400A (en) 1947-04-24

Family

ID=22018645

Family Applications (1)

Application Number Title Priority Date Filing Date
GB705444A Expired GB587400A (en) 1943-04-21 1944-04-17 Improvements in or relating to process of and apparatus for treating sewage and other waste liquors

Country Status (1)

Country Link
GB (1) GB587400A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2362794A1 (en) * 1976-08-23 1978-03-24 Mitsui Toatsu Chemicals WASTEWATER TREATMENT PROCESS
FR2551049A1 (en) * 1983-08-29 1985-03-01 Magyar Asvanyolaj Es Foeldgaz METHOD AND APPARATUS FOR PERFORMING SUBMERGED AEROBIC BIOLOGICAL PROCESSES
WO1990011971A1 (en) * 1989-04-11 1990-10-18 J. Stog Tec Gmbh Process for the biological treatment of waste water using microorganisms
WO2006083522A1 (en) * 2005-01-13 2006-08-10 Proline Wastewater Equipment, L.L.C. Aerobic wastewater management system, apparatus, and method

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2362794A1 (en) * 1976-08-23 1978-03-24 Mitsui Toatsu Chemicals WASTEWATER TREATMENT PROCESS
FR2551049A1 (en) * 1983-08-29 1985-03-01 Magyar Asvanyolaj Es Foeldgaz METHOD AND APPARATUS FOR PERFORMING SUBMERGED AEROBIC BIOLOGICAL PROCESSES
WO1990011971A1 (en) * 1989-04-11 1990-10-18 J. Stog Tec Gmbh Process for the biological treatment of waste water using microorganisms
AU632551B2 (en) * 1989-04-11 1993-01-07 J. Stog Tec Gmbh Process for the biological treatment of waste water using microorganisms
US5294340A (en) * 1989-04-11 1994-03-15 J. Stog Tec Gmbh Process for the biological treatment of waste water using microorganisms
WO2006083522A1 (en) * 2005-01-13 2006-08-10 Proline Wastewater Equipment, L.L.C. Aerobic wastewater management system, apparatus, and method

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