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Materials Recovery Facility

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The District’s Materials Recovery Facility (MRF) was constructed in 1995 in order to meet the state’s requirement that recyclable materials be separated from the municipal waste stream.  The facility is currently operating ten hours per day, five days per week.

Mixed solid waste is delivered to the facility by District collection vehicles.  The vehicles are weighed and then backed into the tip hall to discharge their material.  Floor monitors remove large recyclable and reject items (cardboard boxes, tires, wood, large plastics, etc.) to a separate area for removal.  The remainder of the waste is moved by front-end loader to an inclined feed conveyor.  This conveyor feeds a rotating trommel screen, which tears open the bags and separates the waste material according to size.
Interior view of trommel sorting of waste
 

The smaller fraction (0 – 4 inches) contains mostly organic waste, inerts, small papers, and some containers.  This material passes under a cross-belt magnet to remove ferrous metal for recycling, then moves onto a sorting belt for manual picking of recyclable materials.  The remaining waste drops onto a rejects conveyor to be loaded into transfer trailers for disposal at the Hempstead Resource Recovery Facility.

The mid-sized fraction (4 – 8 inches) contains mostly plastic and metal containers, small packaging items, small papers and some organics.  This material also passes under a cross-belt magnet to remove ferrous metal for recycling, then moves onto a sorting belt for manual picking of recyclable materials.  As with the smaller fraction, the remaining waste drops onto a rejects conveyor to be loaded into transfer trailers for disposal off-site.

The largest fraction (>8 inches) contains mostly paper products of various grades, corrugated items, large containers and film plastics.  This material exits the trommel into an enclosed picking station where recyclable materials are removed.  The remaining waste is loaded into transfer trailers for disposal off-site.

Recyclable materials recovered by the MRF include newspaper, mixed paper, corrugated cardboard, mixed plastics (HDPE, PET, etc.), metals (ferrous, bi-metals, tin, aluminum, etc.), and wood.

 

 

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