residues are waiting to serve
-Pulp and shells of coffee
-Shells of Cashew, Pepper
-Roots
-Straw
-Rice and other cereal husks
-Maize spindels
-Mango and other fruit seeds
-Milling dust
-Tree-Bark
-Sewage sludge and faeces
-Paper sludge
-Clothing sewing residues
-Screening oversize of river
dams, composting, biogas