(Joe Amon, The Denver Post)
Construction on the machine for fine grinding of secondary products continues at the Momentum Recycling facility scheduled to open in September.
John Lair rattles a plastic bag full of broken glass.
There are bits of plastic, paper labels and chunks of food mixed in with the green, amber and clear — or flint — shards.
"And this is pretty clean," he said of the glass-recycling sample from Waste Management's materials recovery facility on Franklin Street. "Still, it takes a lot of work to clean this up."
That dirty glass, which crumbles into unusable sand as it moves from single-stream bins to recovery facilities, is the bane of recyclers.
Glass tears up sorting machinery. As it crumbles, it becomes even more difficult to clean and sort. It costs big money to move glass around, unlike a bale of paper, plastic or aluminum. Any bit of contaminant — food, paper, pebbles, a chip of ceramic — can ruin a bottlemaker's batch of glass.