Treatment of wool scouring effluent

A process for the treatment of effluent from wool scouring comprises the following steps: (a) coagulating the solid effluent fraction by adding thereto a pH lowering agent, e.g. ferric chloride, and then adding a pH raising agent, e.g. lime, to give a pH suitable for environmental discharge (b) floc...

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Bibliographic Details
Main Authors DAVID CHARLES HOBSON, ALBERT PAUL CHIPPENDALE, STEPHEN CHRISTOPHER BLACKBURN
Format Patent
LanguageEnglish
Published 26.05.1999
Edition6
Subjects
CHEMISTRY
METALLURGY
TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
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Summary:A process for the treatment of effluent from wool scouring comprises the following steps: (a) coagulating the solid effluent fraction by adding thereto a pH lowering agent, e.g. ferric chloride, and then adding a pH raising agent, e.g. lime, to give a pH suitable for environmental discharge (b) flocculating the coagulated solid effluent fraction by adding thereto a flocculating agent, e.g. an anionic high molecular weight polyacrylamide copolymer, effective at the pH of the coagulated solid effluent fraction and (c) separating the flocculated solid effluent fraction from the liquid effluent fraction. The process, which can preferably be carried out as a continuous process in a pipe-like treatment chamber through which the effluent is pumped as it undergoes the various treatment stages at intervals along its length, reduces effluent COD values before discharge into the environment.
Bibliography:Application Number: GB19970024789