The bioreactor with a capacity of 1m3 made up of fiber material. A batch study was carried out in floating drum
anaerobic bioreactor. The effective volume of the bioreactor was maintained at 700 liters. This reactor was properly
provided with suitable arrangements for feeding, gas collection and draining of residues. In this experiments were
carried out in the mesophilic temperature range. The bioreactor was initially inoculated with 40kgs cowdung and same
quantity of water was added. Then feedstock selected for the experiment was wet pressmud and dry pressmud were
collected form sugar cane industry. The bioreactor was charged separately for wet and dry pressmud at 30kgs for each
and water was added. The final slurry of reactor used as a bio-fertilizer. Daily biogas production was measured by
using gas flow meter (GI).