There's a small piece of land used for burning tree branches on bonfire (because that's the easiest way to get rid of them). Most of the material gets burnt to ashes but some of it only turns into charcoal. That charcoal pieces are between 5 and 20 millimeters in diameter and mixed with ashes.
Every time a bonfire is run new and new charcoal pieces remain because what remains from the previous bonfire simply doesn't heat enough and fails to burn further. So those pieces of charcoal accumulate in the ashes.
Charcoal doesn't degrade - it's almost pure carbon and noone wants to eat it - and so it remains there forever. It's easy to crush it but that just yields charcoal dust.
How would I get rid of that charcoal other than gathering it and dumping it somewhere (out of sight, out of mind)?
I could gather it (together with some ashes, but whatever) and try to burn it but it looks like it would be problematic because setting such small pieces of charcoal on fire is non-trivial.
What would be a good way to get rid of charcoal?