Self - Circulating Biogas Generation for Swine Waste

Waste management plays key role in the development of a nation. There are many technologies to produce and extract energy. Several investigation has been made for generation of biogas from animal waste. A total of about 89,600 tons of Swine waste is produced per day in India. The characteristics of Swine waste is that it has a low C/N ratio, due to high nitrogen content. This will result in the production of ammonia and it destroys the micro-organisms which is responsible for Biogas production. In order to avoid more production of ammonia, swine manure is combined with cow dung, Food Waste each and water in the ratio of 1:1:4 and 1:1.5:4 at a temperature of 35oC. This paper attempts to reduce the retention time by self – circulation of slurry by the gravity difference. Also experiment has been carried out in a thermophilic range for effective digestion. Experiments have been carried out in a fixed dome digester and the gas concentration has been continuously monitored by online biogas analyzer. Comparison study was carried out in two different combination of waste at normal methanogenic micro-organisms.