A friend of mine had this boyfriend once who ran a business that used recycled glass. Something to do with producing high quality sand for filtration systems an

A friend of mine had this boyfriend once who ran a business that used recycled glass. Something to do with producing high quality sand for filtration systems and some other interesting processes (can't remember exactly what it was anymore bummer). The sand was made out of ground glass from wine bottles. As he told me, his process required just the right kind of glass and it had to be very, very clean. There was substantial investment into washing and label removal, to produce the right inputs. He said it was barely worthwhile, and he said that most plastic and even glass recyclables are just too dirty and too mixed up for it to be worthwhile. Al and Fe cans and Cu wire on other hand are absolutely a go.