Biblio

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.

K. V. Ellis, “Slow sand filtration”, CRC critical reviews in environmental control, pp. p. 315-354, 1985.

S. O. Adeyeni, “Local materials as filter material in Nigeria”, in Water and waste engineering in Africa : proceedings of the 6th WEDC Conference 24-28 March 1980 at Ahmadu Bello University, Zaria, Nigeria, 1981, pp. P. 153-156.

L. Huisman, “Rapid filtration : part 1”. Delft University of Technology, Department of Civil Engineering, Delft, The Netherlands, p. figs., 1979.

EPA -Cincinnati, OH, US and EPA -Washington, DC, US, Process design manual : wastewater treatment facilities for sewered small communities. Cincinnati, OH, USA: US Environmental Protection Agency (EPA), 1977, p. xv, 477 p.: fig., tab.

“Handbook of trickling filter design”. Public Work Publications, Ridgewood, NJ, USA, p. 26.p. : fig., tab.