Agricultural residues (also referred to as "agri-waste") are divided into the following two types, this classification being often necessary in the assessment of their potential use as energy source: Field based residues which are generated in the field, such as paddy straw, sugar cane and sweet sorghum tops and leaves, cotton stalk, palm tree leaves, etc.
Process based residues which are generated during processing e.g. paddy husk,bagasse, corn cob/husk, coffee husk, coconut shells, etc.
Field based residues which are generated in the field, such as paddy straw, sugar cane and sweet sorghum tops and leaves, cotton stalk, palm tree leaves, etc.
Fuel crops are grown specifically for the use as fuel. BSD's associated company "BioTherm Industries" has developed a considerable experience in this field. The main purpose this type of crops is to maximize the output of the biomass harvest with a minimum input. This may simply be measured in terms of tons of biomass per hectare. Typical fuel crops are Super Napier grass, Casuarina Junghuhniana, Melia Dubia, Gliricidia (Dendro), Bamboo, (Bamboos Balcooa).
Agri-waste and energy crops attract increasing attention worldwide since they are a renewable resource and because they can be an important helping factor in many developing countries where agriculture continues to be the main economic activity.