Sewage Water Purification Through Direct Exposure to Solar Radiation

The study deals with ecofriendly treatment of sewage water by direct exposure to solar radiation, The water was put in 5 liter plastic containers covered with transparent covers, the experiments were conducted with four treatments [ t1: with out aeration, t2: continuous aeration, t3 and t4 : with 5,3 hour aeration daily] respectively, in order to investigate the quality variation of the polluted water, periodical measurements of the parameters: Salinity, pH, T. Hardness, T. Alkalinity, HCO3- ions, PO4-3 ions, BOD5, total count of bacteria, E. coli and faecal coliform bacteria according to international standard methods. The results showed that after treatment occurred with significant improvement in transparency and water quality, removal percentage of BOD5 68 72% after one week of treatment, T. alk. and PO4-3 65 67% and 95 97 % respectively in the end of the treatment. Also, high decreasing percent in number of TPC 99%, F. coliform and E. coli 100% after four days of treatment.