Chris Kott wrote:I think it would be worth trying the spent grounds in a pelletizer. If you could turn the spent grounds into pellets, they could at least function in equipment designed to burn pelletized material. You might have to tinker with either the formulation of a binding agent that perhaps oxidizes the pellet in combustion, or is an accelerant, or perhaps with the airflow on the stove, but the spent grounds would at least be in a convenient format to handle and combust with conventional equipment.
The home scale pelletizers I have seen seem to be incredibly slow and inefficient. from the Videos I have seen on youtube I cant imagine someone producing the 3 to 5 tons most people in my neck of the woods use per winter with such a unit. Maybe if you wanted to make some for a pellet grill or some other very limited use...And the commercial scale ones are well, commercial scale in size and price.
I do think a pellet stove or more likely a multifuel stove designed to burn corn and pellets and sometimes pits would readily burn whole bean, but I don't have one and they are not cheap even used. And no one I know wants me gumming theirs up with experimenting. But the main drawback is they require electric input so if the power is out there is no heat. (this is one of the many reasons I heat primarily with wood currently)