Micro organsims decompose the organic matter present in sewage
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Saprophytic bacteria devour dead organic substances, which helps to break down waste into inorganic and organic byproducts. These bacteria play a critical role in the treatment of sewage by facilitating or accelerating the decomposition process of organic matter.
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The organic matter present in sewage is unstable and decomposes readily through chemical and bacterial action. ... The nitrogenous and carbonaceous materials present in sewage serve as food for these bacteria. The decomposition of organic matter by bacteria under biological action is termed as biological decomposition.
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