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Screening debris in silicon valley...

Any digging or demolition job inevitably yields material mixed in size and composition. To sort such a mixture and separate its constituent elements, Raptor Screening, owns a portable screening machine—a orbital mobile screening plant with a Kubota diesel engine.

“It will screen anything,” says David, Raptor’s president. “When you tear down a building, it will screen small particles out of concrete. It will separate and screen aggregate and reprocessed asphalt, and separate fine topsoil from trash.

“If you’re developing a site, you take down all the trees and end up with dirt and other foreign matter. You dump this on top of the screening box, which separates out the rocks and roots, leaving you with finished topsoil to spread across the lawn and seed for grass.”

The topsoil falls through the screen; on tot he fines conveyor a 20' long conveyor that can load end dump, ten wheelers or dumpsters or leave a nice fines pile on site. The material being removed drops on to the overs conveyor into a dumpster to haul off debris. Then the rocks can be rescreened and sorted by size for other uses, and the roots can be shredded for mulch. “It’s the ultimate recycling machine,” Lara says.

He estimates that his screener can process 300 cubic yards of topsoil per day.

Lara laments the lack of screening in Demolition all mixed in with topsoil,” he says. “It’s too easy to bring in a big loader and take everything to the landfill the cost of mobilizing a trucks, and a large loader and disposal fees screen the soil and save lots of money. It’s a shame some  people don’t realize the importance of recycling and the cost saving.”