الفهرس 
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Abstract
ABSTRACT : Industrial wastewater laden with high concentrations of ammonia and heavy metals are considered a major problem in densely populated developing countries.This study aimed for elucidating the pollution load of the industrial wastewater receiving ammonia-N rich effluents from El-Delta for fertilizers and chemical industries (EFCI) company which is located about 2 Km north of Mansoura city depending on set of physicochemical analyses during mid-spring 2018- mid-winter 2019 and then the treatment of the this wastewater to be used as a commercial nutrient medium for mass production of some economic microalgae and this is the major goal of the study. The treatment process was conducted in winter 2019 depending on the results of the physic-chemical analysis and toxicity assessment that were carried out for the raw wastewater that revealed the highly toxic state of it. The treatment was carried out using three different doses of sodium alginate 0.25, 0.5 and 1.0 g L-1 wastewater, the results of chemical analysis and toxicity test after the treatment process proved the high efficiency of 1.0 g sodium alginate in the nutrient bioremoval from the investigated wastewater. The partially 0.25, 0.5 and 1.0 sodium alginate treated wastewater were used, separately as nutrient media to test for the test algae growth, the results confirmed that this dose resulted in reducing the inorganic nutrients especially ammonium- nitrogen and copper into level which stimulated the test algae Chlorella vulgaris and Scenedesmus dimorphus growth compared to 0.25, 0.5 g. The N:P mass ratio of 1.0 g sodium alginate treated wastewater was adjusted at 9.9 due to the condition of phosphorus limitation. The results of toxicity test for 1.0 g alginate treated wastewater with N:P adjustment confirmed that the wastewater became nontoxic for both test algae. The results obtained from the biochemical composition (protein, carbohydrate and lipid) analyses for both test algae demonstrated the highest dry weight biomass and total protein content were recorded after both test algae cultivation on1.0 g treated wastewater with N:P adjustment , separately compared to control. This finding clearly addressed the possibility of using this treated wastewater as the sole N source for economic mass production of certain microalgae for commercial and applied purposes.