Recycling
Trials in the UK on recycled glass have demonstrated that it can be used effectively or more effectively than sand as a filtration media. The R&D Manager of Yorkshire Water, Andrew Calvert, indicated that recycled glass did not clog or foul when subjected to high concentrations of contaminants. Further, the recycled glass had an equal or better performance rating than sand when being backwashed (http://tinyurl.com/czqk).