Based on laboratory testing the settling velocity of alum floc is 0.0014 ft/sec in water at 10c. convert the settling velocity to units of overflow rate in gallonsper day per square foot. what is the retention time in quiescent water in hours for alum floc to settle from the surface of the water to a depth of 10ft ?

what size pipe should be used to supply 82 l/s so that the velocity does not exceed 1 m/s assuming a c =100 ?

the alkalinity of a water sample consists of 12 mg/l of (co3 - ) and 100 mg/l of (hco3 calcculate the alkalinity in milligrams per liters as caco3.