Suspended Solids are to be removed through coagulation/flocculation followed by gravity settling. Alum and lime are added at stoichiometry rates sufficient to form 25mg/L of Aluminum Hydroxide sludge. For the following data, calculate the alum and lime dosages.
Flow - 1.0 Mgal/day
Al2(SO4)3 + 3 Ca(OH)2 -> 2Al(OH)2 (settled) + 3CaSO4
Alum = Al2(SO4)3
Lime = Ca(OH)2