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Q7) An aeration test for determining KLa for a wastewater yielded the following data at 25C : dCL/dt=65mg/L/h,=0.76,=0.92,Cs=8.90 mg/L in tap water, CL=0.8mg/L at that rate of change of CL with time (i.e., at that dCL/dt ). Determine KLa at 25C and at 20C