[Terrapreta] Simple charcoal grinder

[Richard Haard]

I use a plaster type mixer for some kinds of seed cleaning with  
carefully selected stone size to make sure seed does not get crushed  
in this operation. For breaking charcoal the hammermill type of  
compost shredder works best for me. To keep the dust from drifting  
away I tie a piece of shade cloth over the outlet and the  
backpressure helps the dust to settle. Advantage over the mixer  
option - quick and dirty.


Rich