Biodigester
Disposal of human waste at extremely cold terrains, railways and even in rural areas is a major concern. DRDO has developed different versions of bio-digester to take care of disposal of human waste. The biodigesters have been extensively fitted indifferent types of rail coaches by Indian Railways with collaboration of DRDO. Biodigesters are suitable for ambient as well as sub zero temperature of Himalayan region, glaciers, plains of north India and coastal regions of south India. In addition to human excreta, it can also be used for kitchen and animal waste disposal. The technology has no dependence on the limited and costly conventional energy sources.