Groundwater at a flow rate of 1,500 gpm, containing three volatile organic compounds (VOCs), is to be stripped in a trayed tower with air to produce drinking water that will meet EPA standards. Relevant data are given below. Determine the maximum air flow rate in scfm (60F, 1 atm) and the number of equilibrium stages required if an air flow rate of twice the minimum is used and the tower operates at 25°C and 1 atm. Also determine the composition in parts per million for each VOC in the resulting drinkingwater.

Transcribed Image Text:

Concentration, ppm Мах. for Ground Drinking Component K-value water water 1,2-Dichloroethane (DCA) Trichloroethylene (TCE) 1,1,1-Trichloroethane (TCA) 60 85 0.005 0.005 650 120 0.200 275 145 Note: ppm = parts per million by weight.