Fuel supply is critical to the reliable and efficient operation of any biomass based system. Biomass fuel is primarily classified into the following categories:
- Agricultural waste viz. corn stalks, straw, seed hulls, rice husk, bagasse, nutshells, mustard & cotton stalk, manure from cattle, poultry, and hogs, etc.
- Wood materials viz. wood / bark, sawdust, timber slash, mill scrap, forest waste.
- Municipal waste viz. waste paper and yard clippings etc.
- Energy crops viz. switchgrass, jatropa, prairie bluestem, corn, soybean etc.