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7333632 
Book/Book Chapter 
Surface water treatment by roughing filters: A design, construction and operation manual 
Wegelin, M 
1996 
Swiss Centre for Development Cooperation in Technology and Management 
St. Gallen, Switzerland 
English 
This manual presents water treatment alternatives for rural water supplies in developing and newly industrialized countries and describes processes for solid matter separation. Part 1 contains a general introduction to rural water treatment. It describes the water treatment concept and raw water quality of different types of surface water, summarizes the various treatment processes used for solid matter separation, gives a brief account of bacteriological water quality improvement, provides a general layout of water supply schemes, and presents the development of roughing filter application. Part 2 describes design, construction, and operation characteristics of different prefilters and roughing filters. It provides information on filter layout, presents practical experience with different filters, describes construction, operational and economic aspects, illustrates some design examples, and discloses valuable information on the practical implementation of the prefiltration technology. 
bacteriological quality; cab96/5; construction; design; economic aspects; efficiency; guidelines; manuals; operation; pretreatment; roughing filtration; rural supply systems; selection criteria; surface waters; suspended solids removal; water quality 
SANDEC report, no. 2/96 
3908001676