By Pete Lewis, NGT News.
As communities across the U.S. convert their fleets to cleaner-burning, domestically produced alternative fuels, the next logical step is to power those fleets with fuel that's already produced by the community.
Digester gas is a natural byproduct of landfills and wastewater treatment plants. Until recently, digester gas, or biogas, was considered an unavoidable nuisance. The challenge was finding a method to get rid of the gas in the cleanest, safest and cheapest manner. The gas typically was released into the atmosphere or flared off. Landfills and treatment plants were satisfied to simply dispose of this potentially valuable resource.