Sewage clarification by dissolved air flotation and chemically assisted sedimentation

The removal efficiencies of two physico-chemical methods of sewage treatment, viz. dissolved air flotation (DAF) and chemically assisted sedimentation (CAS) were investigated on pilot-plant scales. The experimental treatments were factorial combinations of chemical programmes, chemical dosages and h...

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Bibliographic Details
Published in:	Environmental technology Vol. 13; no. 12; pp. 1141 - 1151
Main Authors:	Kuo, E. C-H, Goh, M. K-H
Format:	Journal Article
Language:	English
Published:	London Taylor & Francis Group 01-12-1992 Selper
Subjects:	Applied sciences clarification dissolved air flotation Exact sciences and technology General purification processes Pollution sedimentation Sewage treatment Wastewaters Water treatment and pollution Australia Oceania Pilot plant Suspended particle Clarifying Flotation Oil Grease Industrial waste water Physicochemical purification Waste water purification Comparative study Optimization Chemical sedimentation
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Summary:	The removal efficiencies of two physico-chemical methods of sewage treatment, viz. dissolved air flotation (DAF) and chemically assisted sedimentation (CAS) were investigated on pilot-plant scales. The experimental treatments were factorial combinations of chemical programmes, chemical dosages and hydraulic loadings. These were applied to both raw and settled sewage. DAF was demonstrated to be more efficient than CAS in removing suspended solids and oil/grease. Chemical dosage proved to be the most important factor in removal efficiency for both processes.
ISSN:	0959-3330 1479-487X
DOI:	10.1080/09593339209385253