Design of cylindrical fixed dome bio digester in the condominium houses for cooking purpose at Dibiza Site, East Gojjam, Ethiopia

摘要

Organic Waste is undesirable matter, which is most frequently generated by human activity that causes environmental pollution. Therefore, domestic biogas production is one of the most promising method of biomass wastes treatment because it provides a source of energy while simultaneously resolving ecological, environmental and agrochemical issues. The provision of bio - energy tackles both energy poverty and the reliance on polluting and Non - Renewable fuels as a result matured biogas production technology has led to the development of a number of biogas appliances for lighting, power generation, and cooking. The most promising among them is the biogas energy in order to meet the energy requirement for cooking application at domestic and community level. In this paper, an attempt has been made to design and develop a cylindrical torpispherical fixed dome bio digester for cooking application in the condominium houses at Debiza site in Debre Markos, East Gojjam in Amhara Region. The size of biogas plant is 53m~3 and the input materials are different wastes such as kitchens, food waste and the human excreta from a total of 357 people living in four building of 120 residence. The gas production rating of the developed biogas plant is 25.36m~3/day, which accounts 60.73% of the energy consumption that covers all the energy demand of firewood, charcoal and animal dung cakes that used for baking Injera and bread. The amount of gas obtained averagely, 0.211m~3/ per household per day for cooking purpose.