GB1429264A - Process for purifying reducing waste waters containing thiocyana tes and thiosulphates - Google Patents

Process for purifying reducing waste waters containing thiocyana tes and thiosulphates

Info

Publication number
GB1429264A
GB1429264A GB1207173A GB1207173A GB1429264A GB 1429264 A GB1429264 A GB 1429264A GB 1207173 A GB1207173 A GB 1207173A GB 1207173 A GB1207173 A GB 1207173A GB 1429264 A GB1429264 A GB 1429264A
Authority
GB
United Kingdom
Prior art keywords
waste water
thiocyanate
reducing waste
sludge
ammoniacal
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
GB1207173A
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.)
Tokyo Gas Co Ltd
Original Assignee
Tokyo Gas Co 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 Tokyo Gas Co Ltd filed Critical Tokyo Gas Co Ltd
Publication of GB1429264A publication Critical patent/GB1429264A/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
    • C02F3/1231—Treatments of toxic sewage
    • 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

1429264 Treating waste water TOKYO GAS CO Ltd 13 March 1973 [13 March 1972] 12071/73 Heading C1C A process for purifying a reducing waste water containing thiocyanate and thiosulphate ions comprises: (i) treating a sewage sludge with an ammoniacal nutritious medium and aerating the mixture to obtain an activated sludge; (ii) acclimatizing the activated sludge with a reducing waste water containing thiocyanate and thiosulphate ions by successively contacting the sludge with portions of the reducing waste water, each of which portions has a higher concentration of thiocyanate and thiosulphate ions than the portion used in the preceding step, each elevation of concentration being carried out after the sludge has become capable of decomposing thiocyanate and thiosulphate ions at the preceding concentration, step (ii) being carried out in the presence of ammoniacal nutritious medium and with aeration; (iii) contacting the acclimatized activated sludge obtained in step (ii) with the reducing waste water to be purified and with further ammoniacal nutritious medium and with non- reducing water (i.e. free from thiocyanate and thiosulphate ions) in an aeration tank and aerating the mixture; and (iv) recovering purified waste water from the aeration tank.
GB1207173A 1972-03-13 1973-03-13 Process for purifying reducing waste waters containing thiocyana tes and thiosulphates Expired GB1429264A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2538472A JPS4894255A (en) 1972-03-13 1972-03-13

Publications (1)

Publication Number Publication Date
GB1429264A true GB1429264A (en) 1976-03-24

Family

ID=12164356

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1207173A Expired GB1429264A (en) 1972-03-13 1973-03-13 Process for purifying reducing waste waters containing thiocyana tes and thiosulphates

Country Status (4)

Country Link
JP (1) JPS4894255A (en)
DE (1) DE2312173A1 (en)
FR (1) FR2175929B1 (en)
GB (1) GB1429264A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2259699A (en) * 1991-09-21 1993-03-24 Osc Process Engineering Limite Process and plant for the treatment of high-strength ammoniacal liquors

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5631156B2 (en) * 1973-09-25 1981-07-20
DE2829142C3 (en) * 1978-07-03 1981-12-24 Boehringer Mannheim Gmbh, 6800 Mannheim Improvement of the degradation of wastewater contaminated with toxic substances

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB847640A (en) * 1957-07-31 1960-09-14 Carves Simon Ltd Improvements relating to the treatment of industrial effluents

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2259699A (en) * 1991-09-21 1993-03-24 Osc Process Engineering Limite Process and plant for the treatment of high-strength ammoniacal liquors
GB2259699B (en) * 1991-09-21 1994-04-06 Osc Process Engineering Limite Process and plant for the treatment of high-strength ammoniacal liquors

Also Published As

Publication number Publication date
DE2312173A1 (en) 1973-09-20
JPS4894255A (en) 1973-12-05
FR2175929A1 (en) 1973-10-26
FR2175929B1 (en) 1978-03-10

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Legal Events

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

Effective date: 19930312