WATER TREATMENT PLANT WITH BALLASTED FLOCS AND DEGREASING

The invention concerns the use of a coagulation-flocculation-decantation device for water treatment to degrease water inside the device itself so as to eliminate therefrom more than 20% of hexane-extractable matter without resorting to separate degreasing means by flotation. The invention also conce...

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Bibliographic Details
Main Author BINOT, PATRICK
Format Patent
LanguageEnglish
French
German
Published 13.09.2006
Subjects
CHEMISTRY
METALLURGY
PERFORMING OPERATIONS
PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
SEPARATION
TRANSPORTING
TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
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Summary:The invention concerns the use of a coagulation-flocculation-decantation device for water treatment to degrease water inside the device itself so as to eliminate therefrom more than 20% of hexane-extractable matter without resorting to separate degreasing means by flotation. The invention also concerns a plant comprising a coagulation-flocculation-decantation device by ballasted flocs having a coagulation zone ( 1 ), means supplying ( 4 ) a granular material denser than water ( 4 ), a flocculation ( 6 ), a decantation zone ( 8 ) and means for recycling ( 15 ) granular material including at least a hydrocyclone ( 17 ). The characterised in that it does nut comprise degreasing means provided upstream of the coagulation-flocculation-decantation device, the grease being removed from the water inside the coagulation-flocculation-decantation device itself without means for injecting air or an equivalent gas.
Bibliography:Application Number: EP20020708408