Water Science & Technology: Water Supply Vol 1 No 1 pp 63–69 © IWA Publishing 2001
The design and operation of conventional and novel
flotation systems on a number of impounded
water types
J Officer*, JA Ostrowski** and PJ Woollard***
*
Paterson Candy Ltd, 632–652, London Road, Isleworth, Middlesex TW7 4EG, UK
**
Paterson Candy Ltd, 632–652, London Road, Isleworth, Middlesex TW7 4EG, UK
***
Paterson Candy Ltd, 632–652, London Road, Isleworth, Middlesex TW7 4EG, UK
ABSTRACT
This paper describes the design of conventional Dissolved Air Flotation
(DAF) systems, and the novel Counter Current Dissolved Air Flotation
Filtration (COCODAFF®) process. The operation and performance of these
plants on a variety of water types in the United Kingdom and South Africa
is also described. The advantages of flotation processes for the treatment
of impounded waters either high in colour, or with a high concentration
of algae, is discussed. Other topics covered in this paper are hydraulic
flocculation, and the application of Finite Element Analysis (FEA), to
the design of flotation plants. It is concluded that the COCODAFF®
process offers a number of advantages over conventional DAF systems.
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