A belt filter press with an effective belt width of 1.5 m dewaters anaerobically digested sludge at a sludge feed rate of 70 gpm. The polymer dosage is 6.0 gpm containing 0.20% polymer by weight, and the wash-water usage is 50 gpm. Based on laboratory analyses, total solids in the feed sludge are 4.0%, total solids in the cake are 35%. and suspended solids in the wastewater (filtrate, polymer feed, and wash water) are 1800 mg/l. Calculate Ihe hydraulic feed rate solids loading rate polymer dosage, and solids recovery. Compare these values with those listed in Table 13.9. .
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