Question: Please provide the equation needed to solve for how much sludge should be wasted to maintain an effluent solids concentration from the clarifier of 3

Please provide the equation needed to solve for how much sludge should be wasted to maintain an effluent solids concentration from the clarifier of 30 mg/L. Please see the attached PFD and equations.
Please provide the equation needed to solve for how much sludge

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