The Rise of Landfill Gas to Energy

The following is an excerpt of an article with the above title in the January 2012 issue of Waste Age magazine:

Landfill gas (LFG) provides power for one million homes and heat for 737,000 homes across the country.  It provides 14 billion kilowatt-hours of electricity and 102 billion cu. ft of LFG for direct use by industry.  It contributes to the nation’s supply of natural gas and clean-burning fuel for vehicles.

The environmental benefits of these LFG uses are huge.  According to the U.S. Environmental Protection Agency (EPA), the use of LFG reduced the consumption of oil in the United States by about 229 million barrels of oil last year.

Using LFG also reduces greenhouse gas emissions.  EPA says that landfills rank as the third-largest human-generated source of methane emissions in the United States.  Among greenhouse gases, methane, the fuel component of LFG, is one of the most potent.  For instance, it is 21 times stronger than carbon dioxide.

The EPA also estimates that a typical LFG energy project collects and uses 60 to 90 percent of the methane emitted by a landfill.

Thanks to the environmental benefits of putting LFG to use, landfill-gas-to-energy has begun to emerge as a renewable energy industry.

Consider the landfill-gas-to-energy (LFGTE) project at the Newton County Landfill in Brook, Ind., for example.  There, LFG is helping to manufacture egg cartons.

One of the largest landfills in the country, Newton County, owned by Phoenix-based Republic Services, Inc., receives nearly 2.7 million tons of trash per year.  Recently, the landfill began sending LFG to the neighboring Newton County Renewable Energy Park through a 2,500-foot pipeline.

At the industrial park, Canadian firm Urban Forestf Recyclers Inc. (UFR) of Swift Current, Sask., manufactures packaging, such as egg cartons, from recycled fiber.  The process blends mixed newsprint and cardboard into a slurry that is poured into molds.  The LFG fuels the system of blowers used to dry the molds.