Liquid from a brewery fermenter can be considered to contain 10% ethanol and 90% water. In a continuous distillation process, 50.0 tonne/h of this fermentation product are pumped to the distillation column. Under current operating conditions a distillate of 45% ethanol and 55% water is produced from the top of the column at a rate one-tenth that of the feed. All compositions are as weight percent. What is the composition of the waste 'bottoms' from the still? What is the rate of alcohol loss in the bottoms? What is the efficiency of the process expressed as the % of ethanol recovered in the distillate? Determine the composition of the distillate as mole fractions and the production rate in kmol/h.