Production of Biogas by Utilizing Rumen Digesta for Sustainable Environment

Energy consumes by the world comes from fossil fuel which is non-renewable and Pollute Environment. Therefore, renewable energy is a possible solution for replacement of fossil fuel. Recycling rumen digesta can be considered as renewable energy source. Anaerobic digestion is one of the best process for rumen digesta management which will lead to production of biogas, reduction in GHGs Emissions and reduce environmental pollution. The purpose of this study was to assess number of slaughterhouse, amount of slaughtered animal, availability of rumen digesta in Sylhet City Corporation and generation of biogas from rumen digesta. Interview schedule was developed for information collection about slaughterhouse number, slaughtered animal number, quantity of rumen digesta from slaughterhouse. The number of slaughterhouse was 18, 3, 8, 4, 3, 19, 11 in Shibgonj, Ambarkhana, Kazitula, Shahi Eidgah, Tilagor, Bondar, Mirabazar respectively. The amount of rumen digesta in different slaughterhouse was 10-12 kg, 300-350 kg, 30-40 kg from chicken, cow and goat respectively. The experiment was carried out in 3300ml digester under mesophilic condition. The mixing ratio of animal digesta and water was 1:1. Hydraulic retention time of the experiment was 40 days. The result showed that co-digestion of rumen digesta of chicken, cow, goat increased production of biogas. The maximum biogas generation from rumen digesta of chicken, cow, goat and co digestion of three substrates were 27.2, 3, 39, 7.5 ml/day at the 12th,28th, 9th, 1st day respectively. The average production of biogas from chicken, cow, goat and co digestion of rumen digesta were 9.865, 1.3125, 6.89, 6.35 ml/day respectively. The average methane production were 58.69, 58.77, 57.39 and 56.93% in produced biogas from chicken, cow, goat and mixed rumen digesta. The study suggests to make a digester in every slaughterhouse for recycling rumen digesta and produce biogas which can recover future energy crisis and reduce environmental pollution.