How does anaerobic digestion of waste takes place?
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Feb 18
Anaerobic digestion of waste takes place in a sealed, oxygen-free environment such as a digester tank. The process involves the breakdown of organic materials by microorganisms in the absence of oxygen.
During anaerobic digestion, different types of bacteria break down the organic matter in the waste, producing biogas as a byproduct. The biogas is primarily composed of methane and carbon dioxide, and can be used as a renewable energy source.
The process typically involves four main stages: hydrolysis, acidogenesis, acetogenesis, and methanogenesis. In the hydrolysis stage, complex organic molecules are broken down into simpler compounds. These compounds are then further broken down into volatile fatty acids and alcohols in the acidogenesis stage.
In the acetogenesis stage, acetate and hydrogen are produced from the volatile fatty acids. Finally, in the methanogenesis stage, methane and carbon dioxide are produced by methanogenic bacteria.
Overall, anaerobic digestion is a natural process that can help to reduce the volume of waste, produce renewable energy, and reduce greenhouse gas emissions.