DETERMNATION OF THE BEST RETENTION TIME FOR
DESALINATION BY ALGAE PONDS

Nagy, A. M.1*, El Nadi, M. H. 2 & El Hosseiny, O.M. 3
Page No. 1-5

The study aims to determine the best retention time for desalination using algae under nature
conditions. The experiment was applied on a pilot plant exposed to nature conditions. This pilot
consists of three consecutive basins; each basin was divided into three equal parts fed by saline
water with constant concentration 30000 ppm. Algae was added by 400 ml/path with adding 100
ml/path of the artificial media BG-11. By using varied retention time ranged from 7 days to 9 days
for each basin. The results showed that, the TDS removal efficiencies for the different retention time
were very close to each other which resulted the 7 days is the best retention time for algae
desalination process technically and economically with maximum TDS removal efficiency reached
to 92.67% after three serial basins.
Keywords: Water Desalination, biological desalination, desalination by algae Ponds, Factors affects
algae desalination ponds.