We don't have the brown kitchen waste bins in our area, but we do have green bins which are supposed to be for grass cuttings,plant waste,weeds,small twigs etc... I can't get a sensible answer out of the council about why i can't put veg waste & peelings in there. I already put things like pea pods and cabbage leaves in there because i figure if i did grow those veggies then that might be my garden waste!
I wonder if they don't do it to keep it clear cut, because if they say veg waste is allowed that means people might end up putting other food in there.