Direct filtration system has been employed as alternative to the conventional coagulation-flocculation-sedimentation-filtration system for treating surface water. the major advantage of a direct filtration plant' over a conventional treatment plant is a capital cost savings of approximately 20-30 percent.
This study was conducted to obtain comparative field performance evaluation of direct filtration system for treating the Nile River water for domestic use. A pilot plant for this study was constructed. The pilot plant was located in the water treatment plant of EL-Nasr Co. for fertilizer and chemical industries at Talkha, Dakahlia. The pilot plant consisted of a coarse media filter followed by a dual media filter.
In this study, several variables were monitored. Some varied naturally, other variables were modified by the researcher and others were held constant through the study. Natural variables were raw water turbidity, pH, and total plankton population, Experimental variables were chemicals dosages, filtration rales and operation methods. Media types, shapes and size, and depth were held constant.
The effect of these variables were discussed. The result of this study showed that the Nile River water can be successfully treated under different modes of Direct Filtration.