Which statement best describes methods of energy recovery in landfills?

Which statement best describes methods of energy recovery in landfills?

• A. Energy recovery can include heat from incineration, energy from landfill gas, and conversion of waste into fuels.
• B. Energy recovery relies solely on recycling programs.
• C. Energy recovery is not used in landfills.
• D. Energy recovery is achieved only by anaerobic digestion.

Answer: (D)

Energy recovery from waste involves turning different waste streams or byproducts into usable energy, not relying on a single method. In landfills, energy can be recovered by capturing and using landfill gas (primarily methane) to generate electricity or heat, by using waste in energy-recovery incinerators to produce heat and power, and by converting waste into fuels or fuels via processes like gasification or pyrolysis. Anaerobic digestion is one way to produce biogas from organic materials, but it is not the only path for energy recovery in landfills. The best description recognizes multiple avenues for turning waste and its gases into energy, including heat from incineration, energy from landfill gas, and conversion of waste into fuels.

Energy recovery from waste involves turning different waste streams or byproducts into usable energy, not relying on a single method. In landfills, energy can be recovered by capturing and using landfill gas (primarily methane) to generate electricity or heat, by using waste in energy-recovery incinerators to produce heat and power, and by converting waste into fuels or fuels via processes like gasification or pyrolysis. Anaerobic digestion is one way to produce biogas from organic materials, but it is not the only path for energy recovery in landfills. The best description recognizes multiple avenues for turning waste and its gases into energy, including heat from incineration, energy from landfill gas, and conversion of waste into fuels.