Word Count : 262

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Aeration is a crucial method in the treatment of daily wastes, primarily aimed at reducing organic pollutants and improving water quality. This process involves introducing air into wastewater to increase the dissolved oxygen content, which promotes the growth and activity of aerobic microorganisms. These microorganisms metabolize the organic matter present in the _____ _________ _____ _________ __________ ___ ________ ___.
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