ABSTRACT
Example l: (Solution Chemical Feed Calibration) 01 A calibration test is conducted for a solution chemical feeder. During 5 minutes, a total of 750 m[, is delivered by the solution fteder. The polymer solution is a 1.2% solution. What is the lbslday feed rate? (Assume the polymer solution weighs 8.34 lbslgal.) Normally the mg/L to lbslday equation* is used to determine the lbs/day fced rate. And in making these calculations, the flow rate must be expressed as MGD. Therefore, the m n flow rate must first be converted to gpd and then MGD. The a m i n flow rae is calculated as:
(12,000 mglL ) (0.000057 MGD) (8.34 lbs/day) = 5.7 lbs/day l Polymer l * A detailed discussion of the mg/L to Ibslday calculation is given in Chapter 3.
