Vancouver Landfill: Landfill Gas Collection and Utilization Project

摘要

The Vancouver Landfill is owned and operated by the City of Vancouver and is located in the southwest corner of Burns Bog in Delta, B.C. An active landfill gas (LFG) collection and control system has been operated at the Landfill since 1990 to prevent odours and reduce greenhouse gas emissions. In 2003, the City of Vancouver expanded the existing collection system such that the system now collects approximately 2000 standard cubic feet per minute (scfm) of LFG at a methane content of approximately 50%. The gas collection system includes approximately 200 vertical extraction wells, and 10 horizontal extraction laterals. The laterals are bedded in approximately 2 metres of construction and demolition material that acts as a gas collection and drainage layer. Since September 2003, a beneficial use system owned by Maxim Power Corporation has been operating at the Landfill. Maxim pipes LFG to CanAgro Greenhouses, and at the greenhouse burns the gas generating 5.55 MW of electricity for sale to B.C. Hydro and 100,000 GJ/year of heat for sale to CanAgro. The project results in the recovery of approximately 500,000 GJ/year of energy, the total energy requirements of 3,000 to 4,000 homes, and results in a reduction of more than 230,000 tonnes per year CO2 equivalents or the emissions of approximately 45,000 automobiles. The City of Vancouver will receive revenues of approximately $400,000 per year for the duration of the 20- year contract period.