Viridor to stop landfilling APCr by-products

摘要

Waste management firm Viridor has bought into new technology that treats air pollution control residues (APCr) from incineration and turns them into a useful product. Viridor signed a ten-year contract with Carbon8 Aggregates for removing, treating and recycling APCr, a by-product of the filtering process to clean exhaust gases that leave the plants through flue stacks. The move brings the company closer to sending zero waste from its energy-from-waste (EfW) plants to landfill and puts it ahead of the curve since APCrs could be banned from landfill. Under the new contract, Carbon8 Aggregates will treat 25,000 tonnes of APCr a year from Viridor's EfW plants in Exeter, Cardiff, Ardley and Peterborough. Traditionally this material had to be disposed of at landfill sites. But Carbon8 Aggregates uses waste CO_2, which reacts with the lime content of the APCr to form a carbonated compound similar to limestone. This chemically immobilises the heavy metals in the residue.