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galvis

Water treatment

Visscher, J.T. and

Visscher, J.T. and Galvis, G. (1992) Slow Sand Filtration and Essential Component in Many Multibarrer Water Treatment Systems. CINARA and The Hague, The Netherlands, IRC International Water and Sanitation Centre, Cali, Colombia, Visscher, J.T., Paramasivan, R., Raman, A., and Heijnen, H.A. (1987) Slow Sand Filtration for Community Water Supply. Planning, Design, Construction, Operation and Maintenance. (Technical Paper Series; No 24). IRC International Water and Sanitation Centre, The Hague, The Netherlands, Visscher, J.T., Galvis, G., and Smet, J.E.M. (1994) Slow Sand Filter Design and Construction: Learning from Experience. In Slow Sand Filtration. ed. by MR Collins and Graham, N.J.D. AWWA, American Water Works Association. Denver, USA. pp. 28-37 Visscher, J.T., Quiroga, E., Garcia, M., Madera, C., and Benavides, A. (1996) En la Búsqueda de un Mejor Nivel de Servicio. Evaluación Participativa de 40 Sistemas de Agua y Saneamiento en la República de Ecuador: Cali, Colombia: IRC, The Hague, The Netherlands; CARE, Quito, Ecuador and Cinara, Cali, Colombia. Visscher, J.T., Quiroga, E., García, M., and Galvis, G. (1997) From Technology Transfer to Technology Sharing: In Technology Transfer in the Water Supply and Sanitation Sector: A Learning Experience from Colombia, ed. by JT Visscher; Cinara, IRC. Cali, Colombia. Warner, D.B. (1990) New Roles for Monitoring and Evaluation on Water Supply and Sanitation: WHO, World Health Organisation. Geneva, Switzerland. WASH, (1993) Lessons Learned In Water, Sanitation and Health: Arlington, Virginia, USA: WASH, Water and Sanitation for Health Project. pp. 1-138 WB, (1997) World Development Report 1997. The State in a Changing World. WB, World Bank, ed. by Flanders, S. Oxford University Press. New York, USA. pp. 1-265 Wegelin, M. (1986) Horizontal Flow Roughing Filtration (HRF) Design, Construction and Operation Manual. Duebendorf, Switzerland. IRCWD. 6/86, Wegelin, M. (1988) Roughing Gravel Filters for Suspended Solids Removal. In Slow Sand Filtration. Recent Development in Water Treatment Technology. ed. by NJD Graham; London, U.K. Wegelin, M. (1996) Surface Water Treatment by Roughing Filters: A Design, Construction and Operation Manual: Duebendorf, Switzerland: SKAT, Swiss Centre for Development Cooperation in Technology and Management. 2, Wegelin, M. and Mbwette, T.S.A. (1989) Horizontal-Flow Roughing Filtration. In Pre-treatment Methods for Community Water Supply. An overview of techniques and present experience. ed. by JEM Smet and Visscher, J.T. IRC, International Water and Sanitation Centre. The Hague, The Netherlands. pp. 127-162 Wegelin, M., Boller, M., and Schertenleib, R. (1986) Particle Removal by Horizontal-flow Roughing Filtration. JWater SRT-Aqua, 3, pp. 115-125 Wegelin, M., Schertenleib, R., and Boller, M. (1991) The Decade of the Roughing Filters - Development of a Rural Water-Treatment Process for Developing Countries: Journal Water SRT- Aqua, v. 40, 5, pp. 304-316 Wegelin, M., Galvis, G., and Latorre, J. (1997) La Filtración Gruesa en el Tratamiento del Agua de Fuentes Superficiales. SKAT. Switzerland. Wheeler, D. (1989) The Potential Role of Slow Sand Filtration in Reducing Rotaviral Diarrhea in Less Developed Countries: M.Sc. Thesis. University of Surrey. Wheeler, D., Bartram, J., and Lloyd, B. (1988) The Removal of Viruses by Filtration through Sand. In Slow Sand Filtration: Recent Developments in Water Treatment Technologies. Ellis Horwood Ltd. Chichester, U.K. WHO, (1983) Minimum Evaluation Procedures (MEP) for Water Supply and Sanitation. WHO, World Health Organisation: Geneva, SW: WHO. 227

WHO, (1993) Guidelines for Drinking-Water Quality. Recommendations: WHO, World Health Organisation, Geneva, SW. pp. 1-188 WHO, (1996) Guidelines for Drinking-Water Quality: Health Criteria and other Supporting Information. WHO, World Health Organisation, Geneva, SW. WHO, (1997) Guidelines for Drinking-Water Quality. Surveillance and Control of Community Supplies: WHO, World Health Organisation, Geneva, SW. pp. 1-238 Williams, J. (1828) A Historical Account of Sub-ways in the British Metropolis for the Flow of Pure Water and Gas, Including the Projects in 1824 and 1825. London, U.K. Windle-Taylor, E. (1974) 45 th Report on Results of Bacteriological, Chemical and Biological Examination of London's Water for the Year 1971 - 1973. Metropolitan Water Board. London, U.K. Winer, B.J. (1962) Statistical Principies in Experimental Design: McGraw-Hill Book Company, Inc. USA. Wolman, A. (1981) Prologue: In The Quest for Pure Water, ed. by MJ Taras; AWWA: Denver, pp. viixvii Wolters, H. (1988) Roughing Filtration: a literature study: M.Sc. Thesis. Delft University of Technology and IRC, International Water and Sanitation Center. The Hague, The Netherlands. Wolters, H., Smet, J.E.M., and Galvis, G. (1989) Upflow Filtration. In Pre-treatment Methods for Community Water Supply. An overview of techniques and present experience. ed. by JEM Smet and Visscher, J.T. IRC, International Water and Sanitation Centre. The Hague, The Netherlands. pp. 109- 125 Wolters, H., Smet, J.E.M., and Pardon, M.O. (1989) Downflow Filtration. In Pre-treatment Methods for Community Water Supply. An overview of techniques and present experience. ed. by JEM Smet and Visscher, J.T. IRC, International Water and Sanitation Centre. The Hague, The Netherlands. pp. 93- 107 Woodward and Ta, C.T. (1988) Developments in Modelling Slow Sand Filtration: In Slow Sand Filtration, ed. by NJD Graham; Ellis Horwood Ltd. England, pp. 349-366 WRC. (1977) Water Purification in the EEC: Pergamon Press, New York, USA. Yao, K.M., Habibian, M.T., and O'Melia, C.R. (1971) Water and Wastewater Filtration: Concepts and Applications: In Environmental Science and Technology.pp. 1105 Yepes, G. (1990) Análisis de Mínimo Costo: ACODAL, v. 144, Bogotá, Colombia. 228

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