... Treatment of Wastewater, Encyclopedia of Environmental Science and Engineering, 4th Ed., Vol 1, Gordon and Breach, Inc., New York 1998 Bewtra, J.K and H.I Ali, Physical and Chemical Treatment of Wastewaters, ... Geyer, and D.A Okun, Water and Waste Water Engineering, and 2, John Wiley and Sons Inc., New York, N Y., 1968 12 Guttman, H.N., Microbiology, Encyclopedia of Environmental Science and Engineering, ... Environmental Science and Engineering, 1, Gordon and Breach, New York, 1979 Camp, T.R., Trans ASCE, 3, p 895, 1942 Cecil, L.K., Water reuse, Encyclopedia of Environmental Science and Engineering, ...