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GB1388399A - Dewatering of sludges - Google Patents

Dewatering of sludges

Info

Publication number
GB1388399A
GB1388399A GB5549871A GB5549871A GB1388399A GB 1388399 A GB1388399 A GB 1388399A GB 5549871 A GB5549871 A GB 5549871A GB 5549871 A GB5549871 A GB 5549871A GB 1388399 A GB1388399 A GB 1388399A
Authority
GB
United Kingdom
Prior art keywords
dewatering
sludge
sludges
nov
units
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
GB5549871A
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 GB5549871A priority Critical patent/GB1388399A/en
Publication of GB1388399A publication Critical patent/GB1388399A/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
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
    • C02F1/54—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using organic material

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Hydrology & Water Resources (AREA)
  • Engineering & Computer Science (AREA)
  • Environmental & Geological Engineering (AREA)
  • Water Supply & Treatment (AREA)
  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Separation Of Suspended Particles By Flocculating Agents (AREA)
  • Treatment Of Sludge (AREA)

Abstract

1388399 Dewatering sludges IMPERIAL CHEMICAL INDUSTRIES Ltd 15 Nov 1972 [30 Nov 1971] 55498/71 Heading C1C In a process for dewatering a sewage sludge the sludge is flocculated with a copolymer comprising 1-99% by weight of units of the formula where R=H or CH 3 , A=alkylene having 2 to 3 C atoms, X-=monovalent anion (e.g. chloride, bromide, methyl sulphate), the remaining units being derived from methacrylamide. The sludge may then be subjected to a step of compaction, vacuum or pressure filtration, flotation or centrifugation.
GB5549871A 1971-11-30 1971-11-30 Dewatering of sludges Expired GB1388399A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB5549871A GB1388399A (en) 1971-11-30 1971-11-30 Dewatering of sludges

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB5549871A GB1388399A (en) 1971-11-30 1971-11-30 Dewatering of sludges

Publications (1)

Publication Number Publication Date
GB1388399A true GB1388399A (en) 1975-03-26

Family

ID=10474108

Family Applications (1)

Application Number Title Priority Date Filing Date
GB5549871A Expired GB1388399A (en) 1971-11-30 1971-11-30 Dewatering of sludges

Country Status (1)

Country Link
GB (1) GB1388399A (en)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2471391A1 (en) * 1979-12-14 1981-06-19 Hoechst France STRONG CATIONIC POLYELECTROLYTES IN POWDER BASED ON ACRYLAMIDE AND QUATERNIZED OR SALIED DIMETHYLAMINOETHYL ACRYLATE AND THEIR USE FOR FLOCCULATION OF SUSPENSION OF SOLIDS AND COALESCENCE OF EMULSIONS
US4319013A (en) 1977-05-16 1982-03-09 Societe Francaise Hoechst Powdered cationic polyelectrolytes, based on acrylamide and quaternized or salified dimethyl-aminoethyl acrylate, process for producing them
US4396513A (en) * 1981-09-08 1983-08-02 Betz Laboratories, Inc. Use of very high charge cationic polymers in biological sludge dewatering
US4396752A (en) 1977-05-16 1983-08-02 Societe Francaise Hoechst Strong cationic polyelectrolytes in powder form based on acrylamide and quaternized or salified dimethylaminoethyl acrylate for flocculation of solid material suspensions and coalescence of emulsions
US4465599A (en) * 1982-06-04 1984-08-14 Basf Aktiengesellschaft Flocculants based on polymers containing water-soluble dialkylaminoneopentyl (meth)acrylates
US5100561A (en) * 1990-06-06 1992-03-31 Betz Laboratories, Inc. Cationic polymers for sludge dewatering
US5183576A (en) * 1990-06-06 1993-02-02 Betz Laboratories, Inc. Cationic polymers for sludge dewatering

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4319013A (en) 1977-05-16 1982-03-09 Societe Francaise Hoechst Powdered cationic polyelectrolytes, based on acrylamide and quaternized or salified dimethyl-aminoethyl acrylate, process for producing them
US4396752A (en) 1977-05-16 1983-08-02 Societe Francaise Hoechst Strong cationic polyelectrolytes in powder form based on acrylamide and quaternized or salified dimethylaminoethyl acrylate for flocculation of solid material suspensions and coalescence of emulsions
FR2471391A1 (en) * 1979-12-14 1981-06-19 Hoechst France STRONG CATIONIC POLYELECTROLYTES IN POWDER BASED ON ACRYLAMIDE AND QUATERNIZED OR SALIED DIMETHYLAMINOETHYL ACRYLATE AND THEIR USE FOR FLOCCULATION OF SUSPENSION OF SOLIDS AND COALESCENCE OF EMULSIONS
US4396513A (en) * 1981-09-08 1983-08-02 Betz Laboratories, Inc. Use of very high charge cationic polymers in biological sludge dewatering
US4465599A (en) * 1982-06-04 1984-08-14 Basf Aktiengesellschaft Flocculants based on polymers containing water-soluble dialkylaminoneopentyl (meth)acrylates
US5100561A (en) * 1990-06-06 1992-03-31 Betz Laboratories, Inc. Cationic polymers for sludge dewatering
US5183576A (en) * 1990-06-06 1993-02-02 Betz Laboratories, Inc. Cationic polymers for sludge dewatering

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Legal Events

Date Code Title Description
PS Patent sealed
PLNP Patent lapsed through nonpayment of renewal fees