BIOLOGY IN HUMAN WELFARE
MICROBES IN HUMAN WELFARE
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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The primary treatment of sewage involves-
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digestion
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decomposition
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sedimentation and filtration
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none of these
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Explanation:
Detailed explanation-1: -Primary sewage water treatment entails filtration and sedimentation of solid waste inside the water. Secondary sewage water treatment includes biofiltration, oxidation, and aeration. Tertiary sewage water treatment involves the removal of inorganic chemicals such as nitrogen and phosphorus.
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