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Engineering · Civil Engineering
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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.

Data:

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

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