Waste plant parts aswell as plant residues can be used as biofuel. Waste plant parts are plant parts ie of crops that can not be used for food, nor any other purpose and would normally be discarded[1]. Residues are leftovers from plant parts. They are hence plant parts of which a substance, ie oil, ... has allready been derived.
Examples
Examples of waste plant parts include ie olive pits Examples of residues include ie de-oiled cakes from oil crops as rapeseed, Jatropha, Pongamia, ...
Advantages
Unlike most plant parts (ie young branches, ...) or freshly cut logs, residues from crops such as de-oiled cakes are very dry and have a much higher energy density[2].
See also
- Vegetable fats and oils: list of oil crops
- File:Oil_crops.png; appropriate oil crops in various parts of the world