Ws0312 MGD 106 galMx3785 Lgal x1660260 mgL x106 kgmg165329 kgday

(C) Determine the volume of sludge produced per day where Ws is the mass of dry solids removed per day, pw is the density of the water, and Ps is the percentage of sludge solids.

1000 Si 1,03 ii 0.06

Example 4

Physicochemical treatment of a typical pharmaceutical plant generating 33,800 GPD wastewater has indicated that at optimum doses of FeSO4 (500 mg/L), FeCl3 (500 mg/L), and alum (250 mg/L), COD and SS removal of the effluent of 25 and 70%, respectively, can be achieved. Determine the quantities of various chemicals required per day. If 49% strength alum is to be used and 30 days supply is to be stored at the treatment facility, estimate the storage capacity required for the alum.

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