The amount of biomass reaches the normal range( 100-260 m g/L) within a
short period (2-4 days). However, the suitable detention time that gives the maximum Chlorella sp.
removal efficiency and Moina macrocopa production u,as found to be 2 days. The efficiency of
Chlorella sp. removal increased when the starting algal biomass concentration was increased from 100
mglL to 260 mg/L). On the other hand, it did not change after varying the starting number of Moina
macrocopa from 1,500 org./L to 3,000 org,/L (P-value > 0.05