Biological conversion like anaerobic digestion is usually
preferred for biomass with high water content. It is a lowtemperature
process that can process wet or dry feeds (with added
water) economically at a variety of scales. The composition of the
gas produced is primarily carbon dioxide and methane with small
traces of hydrogen sulphide. Fig. 1 shows a general scheme for the
anaerobic digestion based on methane fermentation. The biomass
(banana residue/waste) are first chopped and grounded to reduce
the size and then pretreated to enhance biodegradation. Then, it is
either added directly into the reactor or as slurry which is operated
at temperature suitable for bacteria growth