Biblio

M. Wegelin, Schertenleib, R., and Boller, M., “The decade of roughing filters : development of a rural water-treatment process for developing countries”, Aqua : journal of water supply research and technology, pp. p. 304-316: 17 fig., 2 tab., 1991.

G. J. Alaerts, Buiteman, J. P., and Ahsan, T., “Direct horizontal-flow roughing filtration : an improved pretreatment process for highly turbid water”. p. 14 p. : tab., fig., 1991.

T. S. A. Mbwette and Wegelin, M., “Design, operation and maintenance considerations of horizontal flow roughing filters”, Waterlines, an international journal of water, sanitation and waste, pp. p. 27-29: fig., photogr., tab., 1989.

G. B. Halcrow Gr London and UNICEF -New York, NY, US, “Drawings of rural water supply and sanitation : modules”. UNICEF, New York, NY, USA, p. i, 63 p.: 63 technical drawings, 1989.

M. Pardon, Wegelin, M., and G. C., G., “Prefilters, handpumps and small tanks : key issues for viable rural water supplies?”, Water supply : the review journal of the International Water Supply Association, pp. p. SS18.1-SS18.8: fig., tab., 1989.

J. E. M. Smet and Visscher, J. T., “Pre-treatment methods for community water supply : an overview of techniques and present experience”. IRC, The Hague, The Netherlands, p. 174 p.: fig., tab., 1989.

S. Phillips and McGuckin, J., “The Pyalong slow sand filtration plant : performance from January 1987-June 1988 : final report”. Rural Water Commission of Victoria, Armadale, Vic, Australia, p. various paging: fig., tab., 1989.

IRC International Water and Sanitation Centre, The Hague, NL and National Environmental Engineering Research Institute -Nagpur, IN, NEERI, “Slow sand filtration : phase IV final report”. National Environmental Engineering Research Institute, NEERI, Nagpur, India, p. 118 p.: fig., tab., 1989.

G. A. Bridger, Water quality and treatment, vol. no. D3. Ratmalana, Sri Lanka: National Water Supply and Drainage Board, 1989, p. iv, 182 p.: fig., tab.

C. O. Area de Ab Cali and Cali, C. O. Unidad de, “Agua potable para communidades en zonas cafeteras del Valle del Cauca”. Cali, Colombia, p. 18 p.: fig., tab., 1988.

B. J. Lloyd, Wheeler, D., and Pardon, M., “The performance of slow sand filters in Peru”, in Slow sand filtration : recent developments in water treatment technology, 1988, pp. P. 393-411: fig., tab.

M. Wegelin, “Roughing gravel filters for suspended solids removal”, in Slow sand filtration : recent developments in water treatment technology, 1988, pp. P. 103-122: fig., tab.

P. G. Williams, “Study of a horizontal-flow roughing filter for pretreatment prior to slow sand filtration”, in Seminar on water supply and sanitation, KwaZulu : Elangeni Hotel, Durban, 28-30 June, 1988 : papers, 1988, p. Paper A.2 (11 p.): fig., tab.

D. S. Bhargava and Pande, P. K., “Headloss variations in counter-current constant-rate horizontal filtration employing clay turbidity”, Journal of Institution of Engineers (India). EN, pp. p. 35-37 : fig., 1987.

“Prefiltre a flux horizontal (PFH) : un manuel de conception, de construction et d'exploitation”, vol. no. 07/87. p. 87 p. + 38 p. annexes : fig., tab., 1987.

M. Wegelin, “Horizontal-flow roughing filtration (HRF) : a design, construction and operation manual”, vol. no. 06/86. International Reference Centre for Waste Disposal, Duebendorf, Switzerland, p. 142 p. in various pagings: fig., tab., 1986.

P. E. C. E. P. I. S. - Lima, Lima, P. E. DelAgua -, and PE, P. Ministerio, “The rehabilitation of the water treatment system of the rural community of Cocharcas, Huancayo/Junin, Peru : a pilot project report concerning horizontal roughing filtration”. Peru, Ministerio de Salud, Direccion Tecnica de Salud Ambiental, Lima, Peru, p. 51 p. ; fig., tab., 1986.

B. J. Lloyd, Wheeler, D., Pardon, M., and Symonds, C. N., “Aspects of prefiltration concerned with the application of small scale slow sand filtration in rural communities”. University of Surrey, Department of Microbiology, Guildford, UK, p. 112 p.: fig., tab., photogr., 1985.

C. Kulchatchai, “Behavoir [i.e. behavior] of slow sand filter on treating the effluent from horizontal coconut husk fiber prefilter tube”. Asian Institute of Technology, Bangkok, Thailand, p. IV, 31 p.: Fig., tab., 1984.

T. Gebre-Tsadik, Direct filtration with horizontal roughing filter as pretreatment. Tampere, Finland: Tampere University of Technology, 1984, p. 132 p.

H. P. Sharma, “Performance of horizontal flow prefilter using coconut fiber”. Asian Institute of Technology, Bangkok, Thailand, p. III, 54 p.: Fig., tab., 1984.

D. M. Tam, Vigneswaran, S., and Visvanathan, C., Water filtration technologies for developing countries, vol. no. 12. Bangkok, Thailand: Environmental Sanitation Information Center, ENSIC, 1983, p. 110 p.: fig., tab.

H. P. J. van Schaik, “Water treatment systems and their suitability for gravity fed rural water supplies in Malawi”. S.n., S.l., p. 20, [13] p.: ill., 1983.

E. Trueb, “Horizontal durchflossene Kiesfilter zum Vorreinigen von Overflachenwasser besonders in Entwicklungslandern”, 3 R International, pp. p. 30-32, 1982.

T. Z. University Salaam, “Slow sand filter research project : report 3”. University of Dar es Salaam, Department of Civil Engineering, Dar es Salaam, Tanzania, p. iv, 16, ((28)) p.: fig., tab., 1982.