Clarifier & Settling

Question 1

(SOR) Surface settling (overflow) rate (gal/day/ft^2)

Answer 1

Flow,gpd/ surface area, ft^2

Question 2

(WOR) weir overflow rate, gal/ day/ft

Answer 2

Flow,gpd/weir length, ft

Question 3

Sludge solids, lbs

Answer 3

(Sludge volume, gal)(% solids/100)(8.34 lbs/gal)

Question 4

Raw sludge (ras) pumping, gpm

Answer 4

(Settleable solids, ml/l)(plant flow,gpm)/1000 ml/l

Question 5

Solids loading, lbs/ft^2

Answer 5

(Plant flow, mgd + ras flow, mgd)(mlss, mg,l)(8.34 lbs/gal)/ clarifier surface area, ft^2