FR2234031A1 - Gasifying liq partic for biological purificn of sewage - by oxygenation in which escaping gas is reinjected - Google Patents

Gasifying liq partic for biological purificn of sewage - by oxygenation in which escaping gas is reinjected

Info

Publication number
FR2234031A1
FR2234031A1 FR7323072A FR7323072A FR2234031A1 FR 2234031 A1 FR2234031 A1 FR 2234031A1 FR 7323072 A FR7323072 A FR 7323072A FR 7323072 A FR7323072 A FR 7323072A FR 2234031 A1 FR2234031 A1 FR 2234031A1
Authority
FR
France
Prior art keywords
gas
liq
reinjected
partic
gasifying
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
Application number
FR7323072A
Other languages
French (fr)
Other versions
FR2234031B1 (en
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 Liquide SA
Original Assignee
Air Liquide SA
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 Liquide SA filed Critical Air Liquide SA
Priority to FR7323072A priority Critical patent/FR2234031A1/en
Publication of FR2234031A1 publication Critical patent/FR2234031A1/en
Application granted granted Critical
Publication of FR2234031B1 publication Critical patent/FR2234031B1/fr
Granted 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
    • C02F3/20—Activated sludge processes using diffusers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F23/00—Mixing according to the phases to be mixed, e.g. dispersing or emulsifying
    • B01F23/20—Mixing gases with liquids
    • B01F23/23—Mixing gases with liquids by introducing gases into liquid media, e.g. for producing aerated liquids
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F23/00—Mixing according to the phases to be mixed, e.g. dispersing or emulsifying
    • B01F23/20—Mixing gases with liquids
    • B01F23/23—Mixing gases with liquids by introducing gases into liquid media, e.g. for producing aerated liquids
    • B01F23/234—Surface aerating
    • B01F23/2342—Surface aerating with stirrers near to the liquid surface, e.g. partially immersed, for spraying the liquid in the gas or for sucking gas into the liquid, e.g. using stirrers rotating around a horizontal axis or using centrifugal force
    • B01F23/23421—Surface aerating with stirrers near to the liquid surface, e.g. partially immersed, for spraying the liquid in the gas or for sucking gas into the liquid, e.g. using stirrers rotating around a horizontal axis or using centrifugal force the stirrers rotating about a vertical axis
    • 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
    • C02F3/20—Activated sludge processes using diffusers
    • C02F3/205—Moving, e.g. rotary, diffusers; Stationary diffusers with moving, e.g. rotary, distributors
    • 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

Process of mixing an additive gas into a liq. in which additive gas is injected via downward-directed nozzles just below the surface of liq. in a covered tank and gas passing through the liq. to collect in the head space above the liq. surface is reinjected into the liq. e.g. by drawing gas from the head space into a compressor which delivers to injection nozzles near the bottom of the tank; alternatively reinjection of gas can be effected by a turbine impeller drawing gas back in from the head space. For gasifying liqs., partic. injecting oxygen gas or oxygen-enriched air into waste water undergoing biological purification. The initial injection can be at a comparatively low pressure which obviates compressing the additive gas to any great extent. Reinjection of gas escaping at the surface ensures that optimum use is made of the additive gas.
FR7323072A 1973-06-25 1973-06-25 Gasifying liq partic for biological purificn of sewage - by oxygenation in which escaping gas is reinjected Granted FR2234031A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR7323072A FR2234031A1 (en) 1973-06-25 1973-06-25 Gasifying liq partic for biological purificn of sewage - by oxygenation in which escaping gas is reinjected

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7323072A FR2234031A1 (en) 1973-06-25 1973-06-25 Gasifying liq partic for biological purificn of sewage - by oxygenation in which escaping gas is reinjected

Publications (2)

Publication Number Publication Date
FR2234031A1 true FR2234031A1 (en) 1975-01-17
FR2234031B1 FR2234031B1 (en) 1976-07-23

Family

ID=9121494

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7323072A Granted FR2234031A1 (en) 1973-06-25 1973-06-25 Gasifying liq partic for biological purificn of sewage - by oxygenation in which escaping gas is reinjected

Country Status (1)

Country Link
FR (1) FR2234031A1 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2320908A1 (en) * 1975-08-12 1977-03-11 Bayer Ag PROCEDURE FOR REGULATING THE SUPPLY OF OXYGEN IN THE WASTE WATER TREATMENT
GR880100718A (en) * 1988-10-24 1990-11-29 Georgios Karlos System for the dissolution of a gas into a liquid or mixture of liquid and solid by a vibrating grate
GR880100717A (en) * 1988-10-24 1990-11-29 Georgios Karlos System for the dissolution of a gas into a liquid or mixture of liquid and solid by vibrating inverted trough

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3670887A (en) * 1970-12-14 1972-06-20 Union Carbide Corp Aerobic digestion of sludge with oxygen

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3670887A (en) * 1970-12-14 1972-06-20 Union Carbide Corp Aerobic digestion of sludge with oxygen

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2320908A1 (en) * 1975-08-12 1977-03-11 Bayer Ag PROCEDURE FOR REGULATING THE SUPPLY OF OXYGEN IN THE WASTE WATER TREATMENT
GR880100718A (en) * 1988-10-24 1990-11-29 Georgios Karlos System for the dissolution of a gas into a liquid or mixture of liquid and solid by a vibrating grate
GR880100717A (en) * 1988-10-24 1990-11-29 Georgios Karlos System for the dissolution of a gas into a liquid or mixture of liquid and solid by vibrating inverted trough

Also Published As

Publication number Publication date
FR2234031B1 (en) 1976-07-23

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