GB2283485A - Treatment of sludge - Google Patents

Treatment of sludge

Info

Publication number
GB2283485A
GB2283485A GB9500357A GB9500357A GB2283485A GB 2283485 A GB2283485 A GB 2283485A GB 9500357 A GB9500357 A GB 9500357A GB 9500357 A GB9500357 A GB 9500357A GB 2283485 A GB2283485 A GB 2283485A
Authority
GB
United Kingdom
Prior art keywords
sulphate
sludge
digestion
oxidised
heavy metals
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
GB9500357A
Other versions
GB9500357D0 (en
GB2283485B (en
Inventor
John Andrew Hobson
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.)
WRC PLC
Original Assignee
WRC PLC
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 WRC PLC filed Critical WRC PLC
Publication of GB9500357D0 publication Critical patent/GB9500357D0/en
Publication of GB2283485A publication Critical patent/GB2283485A/en
Application granted granted Critical
Publication of GB2283485B publication Critical patent/GB2283485B/en
Anticipated expiration legal-status Critical
Expired - Fee Related 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
    • C02F3/1221—Particular type of activated sludge processes comprising treatment of the recirculated sludge
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F11/00—Treatment of sludge; Devices therefor
    • C02F11/004—Sludge detoxification
    • 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
    • C02F3/345—Biological treatment of water, waste water, or sewage characterised by the microorganisms used for biological oxidation or reduction of sulfur compounds
    • 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)
  • Hydrology & Water Resources (AREA)
  • Engineering & Computer Science (AREA)
  • Environmental & Geological Engineering (AREA)
  • Water Supply & Treatment (AREA)
  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Biodiversity & Conservation Biology (AREA)
  • Health & Medical Sciences (AREA)
  • Molecular Biology (AREA)
  • Removal Of Specific Substances (AREA)

Abstract

Sludges, especially sewage sludges, are treated to stabilise them by biological digestion (21) and/or to remove heavy metals (19, 23) by using a sulphur compound cycle in which sulphate is reduced to hydrogen sulphide which is then re-oxidised (36, 40) to sulphate for return to the process. The sulphate reduction is effected during digestion (21) of the sludge and the sulphate from re-oxidation (usually sulphuric acid) is either cycled to the digestion of more sludge, or used to leach heavy metals (14) and subsequently recovered upon their precipitation as sulphides (23). Instead of sulphate, other sulphur species can be used provided they are more oxidised than hydrogen sulphide. <IMAGE>
GB9500357A 1992-08-03 1993-08-03 Treatment of sludge Expired - Fee Related GB2283485B (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB9216457A GB9216457D0 (en) 1992-08-03 1992-08-03 Treatment of sewage sludge
PCT/GB1993/001637 WO1994003403A1 (en) 1992-08-03 1993-08-03 Treatment of sludge

Publications (3)

Publication Number Publication Date
GB9500357D0 GB9500357D0 (en) 1995-03-08
GB2283485A true GB2283485A (en) 1995-05-10
GB2283485B GB2283485B (en) 1996-05-01

Family

ID=10719743

Family Applications (2)

Application Number Title Priority Date Filing Date
GB9216457A Pending GB9216457D0 (en) 1992-08-03 1992-08-03 Treatment of sewage sludge
GB9500357A Expired - Fee Related GB2283485B (en) 1992-08-03 1993-08-03 Treatment of sludge

Family Applications Before (1)

Application Number Title Priority Date Filing Date
GB9216457A Pending GB9216457D0 (en) 1992-08-03 1992-08-03 Treatment of sewage sludge

Country Status (3)

Country Link
EP (1) EP0652853A1 (en)
GB (2) GB9216457D0 (en)
WO (1) WO1994003403A1 (en)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CZ241896A3 (en) * 1994-02-16 1997-03-12 British Nuclear Fuels Plc Decontamination method of a medium containing material contaminated with one or several metals
RU2133632C1 (en) * 1994-02-16 1999-07-27 Бритиш Нуклеа Фюэлс Псл Method of treating contaminated material
US5976372A (en) * 1995-01-14 1999-11-02 Vesterager; Niels Ole Method of treating a biomass in order to remove heavy metals with hydrogen sulphide
ES2209558T3 (en) * 1998-10-15 2004-06-16 Water Research Commission WATER TREATMENT CONTAINING CARBON SOLIDS.
CN104230129A (en) * 2014-09-01 2014-12-24 陈小洁 Activated sludge treatment method
CN111517604A (en) * 2019-01-31 2020-08-11 江阴市周北污水处理有限公司 Sludge sulfur reduction treatment system for industrial sewage treatment plant
CN114620907B (en) * 2022-04-15 2023-05-05 合肥工业大学 Autotrophic deep denitrification method for producing hydrogen sulfide by utilizing sludge

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4370233A (en) * 1981-07-10 1983-01-25 Cornell Research Foundation, Inc. Chemical detoxification of sewage sludge
FR2548213A1 (en) * 1983-06-20 1985-01-04 Duncan Lagnese & Ass Inc PROCESS FOR THE BIOLOGICAL REDUCTION OF SULFUR OXIDES AND THE OXIDATION OF ORGANIC MATERIALS
DD290408A5 (en) * 1989-12-20 1991-05-29 Veb Wasserversorgung Und Abwasserbehandlung,De METHOD FOR ELIMINATING HEAVY METALS FROM CRYSTAL BLOCKS
WO1991016269A1 (en) * 1990-04-12 1991-10-31 Paques B.V. Process for the treatment of water containing sulphur compounds

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4370233A (en) * 1981-07-10 1983-01-25 Cornell Research Foundation, Inc. Chemical detoxification of sewage sludge
FR2548213A1 (en) * 1983-06-20 1985-01-04 Duncan Lagnese & Ass Inc PROCESS FOR THE BIOLOGICAL REDUCTION OF SULFUR OXIDES AND THE OXIDATION OF ORGANIC MATERIALS
DD290408A5 (en) * 1989-12-20 1991-05-29 Veb Wasserversorgung Und Abwasserbehandlung,De METHOD FOR ELIMINATING HEAVY METALS FROM CRYSTAL BLOCKS
WO1991016269A1 (en) * 1990-04-12 1991-10-31 Paques B.V. Process for the treatment of water containing sulphur compounds

Non-Patent Citations (4)

* Cited by examiner, † Cited by third party
Title
Chemical abstract,Vol 111,No.10,83507e and Environ.Int.Vol 14,No.6,1988 Pages 553-561. *
Dirkzwager A.H. & L`Hermite P.`Sewage Sludge Treatment And Use:New Developments, *
Technological Aspects and Environmental Aspects' 1988 , Elsevier, London GB *
W.H.Rulkens ET AL.: Removal Of Heavy Metal From Sewage Sludge Pages 145-159. *

Also Published As

Publication number Publication date
EP0652853A1 (en) 1995-05-17
WO1994003403A1 (en) 1994-02-17
GB9216457D0 (en) 1992-09-16
GB9500357D0 (en) 1995-03-08
GB2283485B (en) 1996-05-01

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Legal Events

Date Code Title Description
PCNP Patent ceased through non-payment of renewal fee

Effective date: 20100803