Bio Chaff is an item and the initial component of biofuel energy production. It cannot be used directly for fuel, and must be processed in a Canning Machine (into Biomass) for it to be of further use.
Bio Chaff comes from macerating plant matter, producing one per operation.
The required plant matter per Bio Chaff varies, as seen below. (Source: v2.6.105)
|Plantball [ic2exp name]||1|
|Sapling (any treeSapling)||4|
|Leaves (any treeLeaves)||8|
It can also be macerated into dirt.