Die ontwikkeling en toepassing van flottasie as 'n watersuiweringsproseseenheid

Abstract

A report is given of tests carried out in Windhoek, S.W.A. and Pretoria under the project leadership of the author. Intensive studies were conducted on the technical and economic feasibility of reclamining sewage works effluents for potable reuse. In Windhoek a pilot-scale plant (1000 gph) was constructed for the reclamation of maturation pond effluent. A flotation technique was developed for efficient separation of algal floe. This work materialized into the construction of a large-scale reclamation plant treating 1 mgd. In Pretoria an improved process was developed using lime softening/flotation for treating humustank effluents and settled sewage. A large-scale demonstration plant (1 mgd) is currently being designed. A laboratory-scale flotation unit was also used to study the treatment of various types of industrial effluents. The results indicated that this process has great potential as a unit process in water treatment.