Question
Which among the following are the by-products of wastewater treatment?
Answer: Option C
:
C
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:
C
When wastewater is allowed to settle in a large tank, solids like mud, faeces settle at the bottom of the tank. This is called sludge. It is transferred to a separate tank where it is decomposed by anaerobic bacteria. Biogas is produced during this process. Dried sludge can be used as a manure.
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