الفهرس 
INRODUCTIONOnly 14 pages are availabe for public view
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Abstract
ABSTRACT
The main objective of this research is to develop of a small unit for biogas production to be easy to handle, simple, efficient and not expensive and to be available to the small farmers and medium producers. The work is divided into three parts: First part was devoted to study the effect of parameters on design of biogas digester. Second part is devoted to study the biogas production from different agricultural residues (cow dung, poultry litter and rice straw) to overcome the energy scarcity and environmental pollution. Third part was devoted to develop a kinetic model to predict the volume of gas generated is proportional to the mass of the substrate destroyed. To achieve that study the different types of mixing (Dairy manure (100:0), Poultry litter (100:0), Dairy manure, poultry litter and rice straw (25:25:50), Dairy manure and rice straw (20:80), Dairy manure and rice straw (80:20), Dairy manure, poultry litter and rice straw (40:40:20) and Poultry litter and rice straw (50:50)) on the total solids, volatile solids of slurry, biogas yield, methane yield, CO2 and H2S. The results show that the total solids (TS) value ranged from 17.0 to 76.06 % for all different recipe types. The biogas production was ranged from 42.5 to 182.54 m3 for all treatments. The working and