Question: Problem 3 (Water Sample #3) Component Concentration (mg/L) CO 6.0 Ca2+ 50 Mg2+ 20 Na+ 5 Alkalinity 120 as Caco; pH 7.5 Cl- 69.5 For

Problem 3 (Water Sample #3) Component Concentration (mg/L) CO 6.0 Ca2+ 50 Mg2+ 20 Na+ 5 Alkalinity 120 as Caco; pH 7.5 Cl-

Problem 3 (Water Sample #3) Component Concentration (mg/L) CO 6.0 Ca2+ 50 Mg2+ 20 Na+ 5 Alkalinity 120 as Caco; pH 7.5 Cl- 69.5 For each of three water samples (Problems 1-3), calculate the amount of generated sludge (a) report in 1b/day (mass of solids in sludge); and (b) in gallon/day (volume of the sludge) if the sludge contains 11% solids, specific gravity of the sludge is 1.0. Take total residual hardness be 40 mg/L as CaCO3. An excess of 35 mg/L as CaO of lime is added for softening. Both of added lime and soda ash are 100% pure. Treated flow rate is 1 MGD

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