Anything termed anaerobic means that it does it without oxygen. So an anaerobic digester would be something that is able to digest items without oxygen being present. Using an anaerobic digester for composting limits access to oxygen and promotes production of CO2 and methane, which can be captured and burned to generate electricity.
An anaerobic digester is an airtight tank in which anaerobic digestion processes can take place. The container allows anaerobic digestion to take place by keeping out oxygen.
Anaerobic digestion is the process of natural gas recovery from animal manure and other organic waste by anaerobic bacteria. These bacteria break down organic material in the absence of oxygen. After digestion, they give off natural gas as a waste product.
Anaerobic digesters decompose organic waste while limiting access to oxygen. It encourages the generation of methane and carbon dioxide by microbes in the organic waste. The digester gas is used to make electricity by burning the gas. Keep in mind that “digesters aren’t emissions-free. They are known to emit nitrogen and sulfur oxides, particulate matter, carbon monoxide and ammonia.”
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