[Stoves] Forest residues use, as applied to the wet process /low pressure, hand briquettemaking, briquetter....

[Richard Stanley]

Good point AD, 

Also, a very common use is of the crumbs that accumilate around maize and other crop milling too. The dust is actually highly useful as it provides an infiller mateial which makes for a more dense and rigid briquette.

Richard.