1. A packed tower for removal of TCE is being designed to treat a water flow rate of 0.20 m3/s. The tower diameter is 2.5 m and gas hydraulic loading rate of 1.0 m/s. The influent concentration of TCE in the water is 20 mg/L and the treatment objective is 0.2 mg/L. The packing material is 2-inch plastic tripacks. The design temperature is 10C at which temperature H for TCE is 0.208. The diffusion coefficient for TCE in air is 0.079 cm2/s at 10C. a. Assuming that the gas phase is initially free of contaminant, determine the minimum air/liquid ratio (in L air / L water) required to achieve 98% removal of TCE. b. Determine the liquid hydraulic loading rate (in m/s) and the liquid mass loading rate (in kg m-25-1). c. Determine the air to water ratio (in L air / L water). Is it within the typical range for air strippers? d. Calculate the stripping factor for TCE for this column. e. What is the HTU for the column and the required length of column (in m)? Use a Kla value of 0.025 /s