I live in a town where I could get tons of grocery store produce, all the blemished veggies they throw out. This would be great for a biogas plant, but I worry about chemical residue in that stuff. The gas of course would be fine, but the liquid fertilizer might be toxic...! Is there any experience or advice out there?? THANKS
Whip out those weird instruments of science and probe away! I think it's a tiny ad:
