![]() Landfill Gas Energy Basics of LMOP's LFG Energy Project Development Handbook. In Landfill Gas Primer - An Overview for Environmental Health Professionals. The time after placement scale (total time and phase duration) varies with landfill conditions.įigure adapted from ATSDR 2008. Gas composition changes with each phase and waste in a landfill may be undergoing several phases of decomposition at once. Bacteria decompose landfill waste in four phases. The following diagram illustrates the changes in typical LFG composition after waste placement. Learn about alternative options for managing organic waste. Then, typically within less than 1 year, anaerobic conditions are established and methane-producing bacteria begin to decompose the waste and generate methane. When MSW is first deposited in a landfill, it undergoes an aerobic (with oxygen) decomposition stage when little methane is generated. At the same time, methane emissions from MSW landfills represent a lost opportunity to capture and use a significant energy resource. ![]() The methane emissions from MSW landfills in 2020 were approximately equivalent to the greenhouse gas (GHG) emissions from about 20.3 million passenger vehicles driven for one year or the CO 2 emissions from nearly 11.9 million homes’ energy use for one year. Municipal solid waste (MSW) landfills are the third-largest source of human-related methane emissions in the United States, accounting for approximately 14.5 percent of these emissions in 2020. Greenhouse Gas Emissions and Sinks: 1990–2020. Note: All emission estimates from the Inventory of U.S. Learn more about methane emissions in the United States. Methane is a potent greenhouse gas 28 to 36 times more effective than CO 2 at trapping heat in the atmosphere over a 100-year period, per the latest Intergovernmental Panel on Climate Change (IPCC) assessment report (AR5). LFG is composed of roughly 50 percent methane (the primary component of natural gas), 50 percent carbon dioxide (CO 2) and a small amount of non-methane organic compounds. Landfill gas (LFG) is a natural byproduct of the decomposition of organic material in landfills. View answers to frequent questions about landfills and LFG energy projects. ![]()
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