The KMS Peel Inc. energy-from- waste facility is the cornerstone of the integrated waste management system in Ontario’s Peel Region (population one million). KMS has a waste contract with Peel that continues to 2012. Under the terms of the agreement, the region guarantees a minimum annual delivery of 127,900 tonnes of MSW at an agreed tipping fee.
The region employs comprehensive recycling and composting programs that were recently cited by the Association of Municipal Recycling Coordinators. The award recognized the partnership and also the implementation of leading edge technology. The facility serves as an excellent model for jurisdictions that face complex waste disposal decisions.
The provincial environment ministry approved construction of the facility in late 1988 and commissioning ceremonies were held in April 1992. The facility has operated continuously since start up, 365 days per year. The tip fee for solid waste is approximately $70 per tonne.
Incoming waste arrives by truck and is processed through a fuel enhancement system that recovers metal, glass and grit prior to storage on the tipping floor. Hydraulic rams feed four “two-stage” furnaces where high temperatures are maintained by control systems. The primary furnace is maintained at 8,500 degrees Celsius and the secondary furnace is maintained at a minimum of 10,250 degrees Celsius.
“KMS and Peel Region have developed an innovative technology that recycles the ash into approved asphalt construction products.”
Hot combustion gases flow to boilers that produce 100,000 lbs. of steam hourly. A steam turbine drives a generator that produces up to 9 megawatts per hour of electricity. The system can handle 450 tonnes per day of pre-processed solid waste, and can deliver 216,000 KW hrs of electricity daily, which is sold to Ontario Hydro.
Continuous emissions monitors control and monitor flue gases. The units are calibrated automatically each day. The control system stores all operating data which is used to compile monthly reports to the ministry. The Certificate of Approval also mandates periodic checks.
Bottom ash represents 10 per cent of the volume of incoming waste. KMS and Peel Region have developed an innovative technology that recycles the ash into approved asphalt construction products.
KMS, which conducts quarterly audits and annual accuracy tests, has recently decided to expand the plant’s capacity by 25 per cent. The new facility will incorporate the latest advances in emission control and innovative ash processing technology. The fly ash is currently considered to be a hazardous waste and is shipped to a licensed landfill in southern Ontario.
Written by Roy Edwards, an ecologist and (retired) professor of Biology and Edward McLellan, P.Eng., a retired engineer based in Brampton, Ontario.