1.7 A waste treatment system is developed to treat chemical Z at a rate of 1 kg min-'(Fig. P-1.7). Assume 20% of the chemical is adsorbed on the soil, and that the waste stream goes through a sedimentation process that removes all the soil and a negligible amount of water. Distilled water (1.1 m min ) is lost by heating the wastewater. (a) Calculate the rate (kg min-') of chemical lost in the soil. (b) Calculate the concentration of chemical leaving the WWTP if 0.5 kg min of the chemical is destroyed there. Q. = 10 mmin' of water es le Qout Qin= 10 mmin' Liquid and soil Sorting Heat WWTP Solids (soil) Figure P-1.7 Solidification