• You aren't going to drink it, so it can be somewhat contaminated:
  •  For example, we once made a batch from a weeks' garbage from a low-security prison (one of our CAPFA founders worked there), so he separated it out for us.
  • It was mostly lumpy mashed potatoes and stale bread, and we had to fight off the flies while we ran mixed it with water and dumped it into a larger fermentation tank.
  • Then we covered it with window screen to keep the flies away.

Robert Warren