The superintendent of a water treatment plant requests your assistance in calculating the...

 The superintendent of a water treatment plant requests your assistance in calculating the dissolved mineral solids removed in the lime softening of a well water and the sludge solids produced. He wants to present these data to the city council to emphasize the improvement in water quality resulting from treatment. The plant processes 0.45 mgd by the addition of 300 mg/l of hydrated lime, which is 74% CaO by weight, followed by reca rbonat ion.The lime treatment also removes iron and manganese from the water. Analyses of the well water and treated water are listed below,

 (a) Tabulate the ionic concentrations, calculate the milliequivalents per liter, and sketch milliequivalent-per-liter bar graphs. (Refer to Example 11.2.) ,

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 (b) Calculate the dissolved minerals (calcium, magnesium, iron, manganese, and bicarbonate) removed in pounds per day for the 0.45 mil gal of water treated, ,

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 (c) Calculate the dry sludge solids produced per day and the weight of the wet sludge, assuming a solids concentration of 5%.