What are ‘flocs’, formed during secondary treatment of sewage?
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Answer:
Flocs formed during secondary sewage treatment arr the masses of bacteria associated with fungal filaments.
Explanation:
• during secondary waste treatment the primary effulent is passed in large aeration tanks where they are constantly moved mechanically and air is pumped into it
• this allows vigrous growth of flocs ( masses of bacterial associated with fungal filaments to form a mesh like network) and these microbes consume a large portion of organic matter and reduces biological oxeygen demand (BOD) .
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