الفهرس 
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Abstract
The present thesis had been focused on the discharge of untreated textile effluents in the natural environment which is a widespread problem. New technologies have been developed; these processes however are expensive and full scale applications because the dyes undergo chemical changes under environmental conditions and the transformation products may be more toxic and carcinogenic than the original compounds. The electrochemical oxidation and biological treatment of the textile dyes have been used. The bacteria , fungi and yeast were isolated from textile industries wastewater. For the microbial treatment using bacteria, fungi (two fungal strains) and yeast, the color removal (%) reached to 93, (97, 97) and 48 %, respectively. While, COD removal (%) was 78.1 (80.9, 93.3) and 60.2 % for bacteria, fungi (two fungal strains) and yeast. The BOD removal (%) reached to 93.3, (95, 95.4) and 67.2 % for bacteria, fungi (two fungal strains) and yeast, respectively. In case of COD removal (%), the fungal strains showed to be the superior since they gave 80.9 and 83.3% for Fungal strain (f1) named Cunninghamella sp and Fungal strain (f2) named Fusarium solani followed by fenton’s reagent which gave 91%. Bacterial strain (bacillus benzoevorans) gave reduction % equal to 78.1 % while yeast strain (saccharomyces cerevisiae) gave 60.2%.In case of BOD removal (%), the fungal strains showed to be the superior since they gave 95 and 95.4% for Fungal strain (f1) named Cunninghamella sp and Fungal strain (f2) named Fusarium solani followed by fenton’s reagent which gave 94%. Bacterial strain (bacillus benzoevorans) gave reduction % equal to 93.3% while yeast strain (saccharomyces cerevisiae) gave 67.2%. For color removal (%), the fungal strains also showed to be the superior since they gave 97 % for the two fungal strains followed by fenton’s reagent which gave 95%. Bacterial strain (bacillus benzoevorans) gave reduction % equal to 93 % while yeast strain (saccharomyces cerevisiae) gave 48 %.Finally, results obtained proved that fungi are better than other microbes in textile effluent treatment that can be recommended in.