Those Homer buckets are not food-grade plastic, don't put your precious wort in them! They're just good ole cheap buckets and that's it Regarding spent grains, I sometimes give to the neighbors chickens, sometimes throw it on the garden. Also have curbside compost service with my trash & recycling so if I'm really in a pinch I can throw it in there. Occasionally I'll make the dog biscuits, they barely use a small fraction of how much barley-waste there is but the doggies LOVE IT. It's not my recipe originally. It is 4 cups spent grain, 2 cups flour, 1 cup peanut butter, 2 eggs. Mix all ingredients thoroughly, pack into tight shapes and push down to flatten. Bake 1/2 hour at 350F to solidify them, then loosen them from the sheet/pan/whatever and bake for 3-4 hours at 225 (until they are crazy dry like dogfood).