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Sorting and landfill

Landfill

Dry waste is received on the tipping floor and inspected. Bulky items and non-compliant bags are removed. The remaining transparent bags are passed through a bag opener.

In the first sorting station, staff manually remove large objects including cardboard, bulky items and reject material. The waste then moves onto a “fine-screen” to remove small debris. The waste is then transported to the second sorting station where glass, cardboard
and plastic film are removed manually.

After the second sorting station, the waste is sent to the material separator. The material separator divides the waste into two distinct streams: a “flat” stream, which includes mainly paper products, and a “round” stream, which includes mostly containers and plastics. The “flats” are directed to the third sorting station, while the “rounds” are directed to the fourth sorting station. Sorters in the third sorting station remove any contaminants or plastics from the paper.

Sorters in the fourth sorting station extract mixed plastic, clear plastic, PET and all redeemables, including nonferrous metals. A magnetic separator then removes ferrous metals.

The rejected material from the third and fourth sorting stations is directed to trailers for disposal in the landfill cell (SERSC).

Wet waste is delivered to the Wet Plant tipping floor. It is loaded onto a conveyor and sent through a bag opener. The waste is then passed through a trommel screen, which removes plastics and bulkier items. A magnetic separator removes ferrous metals from the Wet stream. A shredder mixes the material with bulking agents such as wood shavings, and it is placed in one of five silos for primary composting. It remains here for 21 days, during which time it is regularly turned by machinery and computer-controlled for air, moisture and temperature levels. The material in the primary silos is then directed to one of the three secondary silos.

After another 21 days, secondary composting is complete and the material is discharged to the refining systems. Rejected material from the refining area are sent to the landfill face while the compost is directed to the final maturing pad outside the Wet Plant (SERSC)

In 1998, New Brunswick became the first Canadian province to close all of its old dumpsites and make the move to a system of regional sanitary landfills. Instead of over 300 open dumps scattered throughout New Brunswick’s landscape, six regional sanitary landfills now house all of New Brunswick’s waste.