الفهرس 
Literature ReviewOnly 14 pages are availabe for public view
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Abstract
Biofuels are expected to become the most sustainable and promising clean alternative fuel in the future. This study was conducted to isolate hydrogen producing ruminant bacteria to design new microbial consortia for biofuel production from different agro-industrial wastes. Two kinetic models (MLM and MGM) were applied to evaluate biohydrogen and biomethane production. The bacterial consortia MOST6 produced the highest hydrogen yield of 848.33 ±15.90 ml/L followed by MOST2 and MOST7 of 781.67 ±15.89 and 760.00 ±14.43 ml/L, respectively. In one stage fermentation process, MOST6 consortium produced 1413.33 ±31.80 ml/L of hydrogen from pretreated sugarcane molasses with an improvement percentage of 196.30%. Using banana peels, the maximum yield of produced hydrogen was 1446.67±60.64 ml/L produced by MOST2 with an improvement percentage of 363.48 %. Hydrogen and methane gases were produced during a two-stage fermentation process by the anaerobic digestion of cow dung, chicken manure, rice straw and food wastes as substrates in the fermentation process. Co-digestion of cow dung and chicken manure with MOST2 inoculum improved the volumes of yielded hydrogen to 1923.33 ±26.03 ml/L and methane to 2815.00 ±34.03 ml/L. These findings suggest using the microbial consortia MOST2 and MOST6 for hydrogen and methane production from cheap agro-industrial wastes.