Waste-to-Energy has various benefits, such as eliminating landfills and creating a significant amount of energy.
FREMONT, CA: In waste-to-energy (WtE), also known as energy-from-waste, waste is used to generate energy, usually heat and electricity. Waste is often burned directly in waste incinerators - i.e., burned - or a combustible fuel is produced from a gas, such as methane. It requires processes such as gasification or anaerobic digestion, which are less common.
In the US, incineration is the most common waste-to-energy method. In order to create electricity, waste is burned, which boils water into steam, which spins turbines. Additionally, the heat generated by combustion can be used.
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Waste-to-energy has the following benefits:
Incineration of waste is better than waste-to-energy: When compared with wasteful incineration practices of the past, waste-to-energy is often promoted as "clean energy." This means it utilizes energy that would otherwise be wasted and does not increase the amount of waste burned. Most responsible waste management plans now include minimal damage and extensive circular solutions that contribute less to climate change than incineration.
Landfills should be avoided: In terms of waste management, landfills are the last resort, generating greenhouse gases, taking up large amounts of land, and potentially allowing pollutants to seep into the ground and groundwater. In 2018, the Environmental Protection Agency reported that 146 million tons of Municipal Solid Waste were disposed of in landfills - approximately 50 percent of all MSW.
The volume of waste that is landfilled can be greatly reduced by waste-to-energy processes at specialist incineration plants. The US Energy Information Administration states that WtE plants reduce waste volume by 87 percent, burning 2,000 pounds of garbage into ash that weighs between 300 and 600 pounds. Still, the benefit assumes that such large quantities of waste will continue to be generated.
Recovering resources: The recovery of valuable resources such as metals post-incineration is another advantage of waste-to-energy over landfilling. Then, they can be recycled and kept in the economy. It even applies to mixed materials, which are notoriously difficult to recycle. By burning plastics, metals are left behind, which is better than burying recyclable materials in landfills.
Waste-to-energy systems of other types: In addition to incineration, there are other waste-to-energy methods that are being implemented to make waste processing more sustainable. Other notable WtE methods include:
The gasification process: Despite being used for centuries, gasification has only been applied to waste in a serious way in the past few decades. Syngas - also known as combustible natural gas - is produced by processing biomass at extremely high temperatures without combustion. Fuel is then produced from this gas.
Distillation and fermentation: Ethanol can be produced by fermenting and distilling biomass. It can then be used as an alternative fuel for engines or other applications. This method can only be used for organic waste and other similar waste streams, like other WtE methods.