الفهرس 
IntroductionOnly 14 pages are availabe for public view
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Abstract
The river Nile water is the main source of drinking water supply in Egypt. It is
included various phytoplankton structures belonging to three main groups,
Chlorophyceae, Cyanophyceae and Bacillariophyceae. Algae and bacteria are the
main source to turbidity and transmitted diseases in water. Treatment of raw water
using two chemical coagulants, namely, aluminium sulphate and aluminium oxide
removed algae about 85% and 94.4%, respectively, and using chlorine as chemical
disinfectant for drinking water. Using algal count as a biological agent reduce alum
dose in water treatment plants to about 2-3 g/m3 and residual alum in drinking water
to about 0.02-0.03g/m3. Also, total coliform, faecal coliform, faecal Streptococci, and
total viable bacterial count was used as biological agents in breakpoint test, which led
to reduce chlorine dose to about 1-2 g/m3 and residual chlorine in treated water to
about 0.1-0.74g/m3 as average. The optimal coagulant dose and chlorine dose were
detected as first time in water treatment plants (WTPs) by algal and bacterial count as
biological agents.