Design, Development and Testing of Screw Press Machine for Paddy Straw under Ground Digester

Paddy straw management is the focus area of government. Several projects and policies are adopted to overcome this problem of burning caused by paddy straw in North India. Paddy straw digester is the developed technique to produce biogas by utilizing paddy straw waste collected from the field. The paddy straw with cow dung loaded in the digester initially. After 7-8 days it starts producing biogas in the absence of oxygen by anaerobic digestion. This project is very beneficial for domestic purpose as well as power generation. The digester produces biogas at the rate of 6 cubic meters daily, which is sufficient for family size 7 to 8 members. After it stop producing biogas, the paddy straw gets converted into solid bio-digested slurry. This solid slurry further used as manure in the farm fields.