<![CDATA[A laboratory experiment   on biogas generation using solid waste in a batch culture under Thermophillic condition was conducted at the Forest Products Research and Development Centre, Bogor.The solid waste used in the experiment were rice straw, water hyacinth (Eichornia crassipes Mart. Solms) and rubber wood (Hevea braziliensis) sawdust.Fermentation  condition  for biogas production  was kept constant under temperature of 53°C for 8 days. Inoculumn used for fermentation was residue from the experiment of organic municipal solid waste fermentation.The raw material used in this experiment consisted of mixture of 73 gram rice straw and 27 gram water, 70 gram rice straw and 30 gram water hyacinth, 38 gram rubber wood sawdust and 62 gram water, 36,25 gram rubber wood sawdust and 63,75 water hyacinth. To each mixture  was added 900 gram of starter with dry matter content 28%. Each substrate sample  was then placed  in a 1,5 littre digester.The result of the experiment  indicates that the highest production  of biogas and methane were produced   from rice straw substrate (0,43 littre of biogas and 0,21 littre of methane per gram of straw respectively), and the efficiency  of biogas produced was 75%.The   total  calorific value of  biogas  produced was lower than  that obtained  from direct burning of rice straw.  Although   the calorific value  of  biogas  is relatively low, its burning quality is better compared  with direct burning. Besides that, the residue from fermentation  process could be utilized as organic fertilizer and mushroom media. ]]>
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