You sort your recycling, leave it to be collected – and then what? From councils burning the lot to foreign landfill sites overflowing with British rubbish, Oliver Franklin-Wallis reports on a global waste crisis

An alarm sounds, the blockage is cleared, and the line at Green Recycling in Maldon, Essex, rumbles back into life. A momentous river of garbage rolls down the conveyor: cardboard boxes, splintered skirting board, plastic bottles, crisp packets, DVD cases, printer cartridges, countless newspapers, including this one. Odd bits of junk catch the eye, conjuring little vignettes: a single discarded glove. A crushed Tupperware container, the meal inside uneaten. A photograph of a smiling child on an adult’s shoulders. But they are gone in a moment. The line at Green Recycling handles up to 12 tonnes of waste an hour.

“We produce 200 to 300 tonnes a day,” says Jamie Smith, Green Recycling’s general manager, above the din. We are standing three storeys up on the green health-and-safety gangway, looking down the line. On the tipping floor, an excavator is grabbing clawfuls of trash from heaps and piling it into a spinning drum, which spreads it evenly across the conveyor. Along the belt, human workers pick and channel what is valuable (bottles, cardboard, aluminium cans) into sorting chutes.