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A primary circular settling tank with average flow is 5000 m3/day with wall depth 4.5m and peak factor of 2.0. To achieve 70% SS reduction and 30% BOD reduction, a surface overflow rate (SOR) of 25 m³/day/m² is required. Calculate the volume of the circular settling tank and surface overflow rate (SOR) at peak flow.

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(x) = -x – 2D) f'(x)=-1 - **534.
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