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Decomposing waste in these landfills produces landfill gas, which is a mixture of about half methane and half carbon dioxide. Landfills are the third-largest source of methane emissions in the United States, with municipal solid waste landfills representing 95 percent of this fraction. [15] [16]
In January, the Department of Agriculture announced a $11.5 million investment into composting and food waste diversion programs across 23 states through the American Rescue Plan Act of 2021.
America’s landfills—and the environmental havoc they create—are sizable. There are roughly 1,200 landfills currently in operation, and on average, each one takes up about 600 acres of land ...
One of the more fruitful fields of work is food waste—when deposited in landfills, food waste produces the greenhouse gas methane and other toxic compounds that can be dangerous to humans and local ecosystems. [11] Landfill gas utilization and municipal composting can capture and use the organic nutrients. [11]
Landfill gas is a mix of different gases created by the action of microorganisms within a landfill as they decompose organic waste, including for example, food waste and paper waste. Landfill gas is approximately forty to sixty percent methane , with the remainder being mostly carbon dioxide .
Landfill bans make it illegal to dispose of certain items in a landfill. Most often these items include yard waste, oil, and recyclables easily collected in curbside recycling programs. States with landfill bans of recyclables include Wisconsin, California, Minnesota, Michigan, [4] and North Carolina. [5] Other states focus on recycling goals.
Landfills are the primary method of waste disposal in many parts of the world, including United States and Canada.Bioreactor landfills are expected to reduce the amount of and costs associated with management of leachate, to increase the rate of production of methane (natural gas) for commercial purposes and reduce the amount of land required for land-fills.
Typically, gas extraction rates from a municipal solid waste (MSW) landfill range from 25 to 10000 m 3 /h where Landfill sites typically range from 100,000 m 3 to 10 million m 3 of waste in place. [5] MSW landfill gas typically has roughly 45 to 60% methane and 40 to 60% carbon dioxide, depending on the amount of air introduced to the site ...