الفهرس 
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Abstract
Thesis was to investigate the potential use of different Chlorella isolates for drainage wastewater treatment and to evaluate the biofuel potential of the resultant algal biomass. For this purpose Bahr El-Baqr drain was selected as the study area to collect wastewater samples at different seasons. The present thesis raises a number of very important question; 1st) Can Chlorella biotechnologically be an efficient applied approach for treating non-toxic fertile drainage wastewater in Egypt? 2nd) Can Chlorella be adapted to seasonal field growth with heavy biomass buildup? 3rd) and Can Chlorella biomass be processed into commercial production of biofuels. By far the results obtained from laboratory experiments indicated reliable role of the investigated Chlorella isolates for treating drainage wastewater through efficient nutrient consumption and biomass buildup. In this study, the wastewater derived Chlorella biomass has been experimentally proven to be reliable feedstock of jet fuel, biodiesel, and bioethanol. Nevertheless, further experimental field growth experiments are still needed to validate the feasibility and applicability of Chlorella biotechnology for drainage wastewater treatment in Egypt.