GB1521258A - Treatment of biologically degradable material - Google Patents

Treatment of biologically degradable material

Info

Publication number
GB1521258A
GB1521258A GB4292374A GB4292374A GB1521258A GB 1521258 A GB1521258 A GB 1521258A GB 4292374 A GB4292374 A GB 4292374A GB 4292374 A GB4292374 A GB 4292374A GB 1521258 A GB1521258 A GB 1521258A
Authority
GB
United Kingdom
Prior art keywords
liquid
dot
millibars
downcomer
subjected
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
GB4292374A
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.)
Imperial Chemical Industries Ltd
Original Assignee
Imperial Chemical Industries Ltd
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 Imperial Chemical Industries Ltd filed Critical Imperial Chemical Industries Ltd
Priority to GB4292374A priority Critical patent/GB1521258A/en
Priority to ZA00756132A priority patent/ZA756132B/en
Priority to IN1871/CAL/75A priority patent/IN142360B/en
Priority to AU85287/75A priority patent/AU8528775A/en
Priority to NO753315A priority patent/NO753315L/no
Priority to DE19752544099 priority patent/DE2544099A1/en
Priority to CA236888A priority patent/CA1054729A/en
Priority to IT2790275A priority patent/IT1043078B/en
Priority to SE7511064A priority patent/SE7511064L/en
Priority to FR7530266A priority patent/FR2286797A1/en
Priority to NL7511596A priority patent/NL7511596A/en
Priority to ES441509A priority patent/ES441509A1/en
Priority to JP11965875A priority patent/JPS5163556A/ja
Priority to DD18871875A priority patent/DD120639A5/xx
Priority to BE160695A priority patent/BE834198A/en
Priority to PL18374575A priority patent/PL109352B1/en
Priority to JP3244578A priority patent/JPS53133960A/en
Publication of GB1521258A publication Critical patent/GB1521258A/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
    • C02F3/1278—Provisions for mixing or aeration of the mixed liquor
    • C02F3/1284—Mixing devices
    • 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
    • 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
    • C02F3/34—Biological treatment of water, waste water, or sewage characterised by the microorganisms used
    • 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)
  • Microbiology (AREA)
  • Biodiversity & Conservation Biology (AREA)
  • Hydrology & Water Resources (AREA)
  • Engineering & Computer Science (AREA)
  • Environmental & Geological Engineering (AREA)
  • Water Supply & Treatment (AREA)
  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Apparatus Associated With Microorganisms And Enzymes (AREA)
  • Micro-Organisms Or Cultivation Processes Thereof (AREA)

Abstract

1521258 Dispersing gases in liquids IMPERIAL CHEMICAL INDUSTRIES Ltd 19 Sept 1975 [3 Oct 1974 8 Jan 1975 13 March 1975] 42923/74 763/75 and 10456/75 Heading B1C [Also in Division Cl] A gaseous liquid containing biologically degradable material in solution and/or suspension is treated with an oxygen-containing gas, and a culture of microorganisms is maintained therein. For a period of time not greater than 5 minutes the liquid is subjected to a low DOT of less than 30 millibars, and/or for a period of time not greater than 10 minutes the liquid is subjected to a high DOT of at least 450 millibars. In this way the ratio of carbon dioxide to cellular material produced by the culture is increased during the process. There is also a period during which the liquid is subjected to DOT between 30 and 450 millibars. The microorganisms are not detrimentally affected by this treatment. The term DOT means dissolved oxygen tension i.e. partial pressure of oxygen in the liquid. This process is useful as a stage in the biological treatment of sewage as described in U.K. Specification 1473665. In Fig. 6 a downcomer (14) and riser (15) are located in the same shaft A-A, separated by partition (23). The upper ends of partition and downcomer are bent over within basin (13) to give deflectors (25) which produce a circulation as indicated by the arrows. Initially air is injected into the riser via sparger (17) in order to start the air lift, but the bulk of the air may subsequently be fed to the downcomer via sparger (16) while the whole system continues to function as an air lift pump.
GB4292374A 1974-10-03 1974-10-03 Treatment of biologically degradable material Expired GB1521258A (en)

Priority Applications (17)

Application Number Priority Date Filing Date Title
GB4292374A GB1521258A (en) 1974-10-03 1974-10-03 Treatment of biologically degradable material
ZA00756132A ZA756132B (en) 1974-10-03 1975-09-26 Treatment of biologically-degradable material
IN1871/CAL/75A IN142360B (en) 1974-10-03 1975-09-30
AU85287/75A AU8528775A (en) 1974-10-03 1975-09-30 Aerobic treatment of waste
NO753315A NO753315L (en) 1974-10-03 1975-09-30
DE19752544099 DE2544099A1 (en) 1974-10-03 1975-10-02 METHOD FOR TREATMENT OF LIQUID WITH BIODEGRADABLE MATERIAL
CA236888A CA1054729A (en) 1974-10-03 1975-10-02 Treatment of biologically-degradable material
IT2790275A IT1043078B (en) 1974-10-03 1975-10-02 GRADABLE BIODE MATERIAL TREATMENT
SE7511064A SE7511064L (en) 1974-10-03 1975-10-02 WAY TO TREAT HEAVY SHOES CONTAINING BIO-DEGRADABLE MATERIAL
FR7530266A FR2286797A1 (en) 1974-10-03 1975-10-02 Treatment of effluent by aeration - with short shocks of high and/or low oxygen concentration to select the best micro organisms
NL7511596A NL7511596A (en) 1974-10-03 1975-10-02 PROCESS FOR TREATING LIQUID CONTAINING BIODEGRADABLE MATERIAL, DISSOLVED AND / OR SUSPENDED IN THE LIQUID.
ES441509A ES441509A1 (en) 1974-10-03 1975-10-03 Treatment of biologically degradable material
JP11965875A JPS5163556A (en) 1974-10-03 1975-10-03
DD18871875A DD120639A5 (en) 1974-10-03 1975-10-03
BE160695A BE834198A (en) 1974-10-03 1975-10-03 TREATMENT OF BIOLOGICALLY DEGRADABLE MATERIAL
PL18374575A PL109352B1 (en) 1974-10-03 1975-10-03 Method of processing liquid containing biologically decomposing material in solution or suspension,or in both states together,specially method of biological purification of sewage
JP3244578A JPS53133960A (en) 1974-10-03 1978-03-23 Device for treating solution or dispersing liquid

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB4292374A GB1521258A (en) 1974-10-03 1974-10-03 Treatment of biologically degradable material

Publications (1)

Publication Number Publication Date
GB1521258A true GB1521258A (en) 1978-08-16

Family

ID=10426567

Family Applications (1)

Application Number Title Priority Date Filing Date
GB4292374A Expired GB1521258A (en) 1974-10-03 1974-10-03 Treatment of biologically degradable material

Country Status (4)

Country Link
BE (1) BE834198A (en)
ES (1) ES441509A1 (en)
GB (1) GB1521258A (en)
ZA (1) ZA756132B (en)

Also Published As

Publication number Publication date
BE834198A (en) 1976-04-05
ZA756132B (en) 1976-09-29
ES441509A1 (en) 1977-07-01

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Legal Events

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