Consider experimental data of dissolved oxygen (DO) concentrations measured in a water sample over time in a reactor of 1m2 surface area. The data are reported in Table 1. Determine: 1) the saturation concentration of oxygen from the measurements; 2) the partial pressure of oxygen applied during the test at 25C considering the Henry's constant (KH) equal to 38.9mgO2/(L atm); 3) the mass transfer coefficient (kla) (Hint: you need to exclude the values at saturation and use the polyfit MATLAB function and polyval to plot the regression); and 4) retention time of a basin with flow rate equal to 0.5m3/d and optimal oxygen concentration ( DOopt ) equal to 6.5mg/L. The consumption of oxygen in the basin due to chemical reactions follows a first order kinetics with a rate constant equal to 1041/s. Consider experimental data of dissolved oxygen (DO) concentrations measured in a water sample over time in a reactor of 1m2 surface area. The data are reported in Table 1. Determine: 1) the saturation concentration of oxygen from the measurements; 2) the partial pressure of oxygen applied during the test at 25C considering the Henry's constant (KH) equal to 38.9mgO2/(L atm); 3) the mass transfer coefficient (kla) (Hint: you need to exclude the values at saturation and use the polyfit MATLAB function and polyval to plot the regression); and 4) retention time of a basin with flow rate equal to 0.5m3/d and optimal oxygen concentration ( DOopt ) equal to 6.5mg/L. The consumption of oxygen in the basin due to chemical reactions follows a first order kinetics with a rate constant equal to 1041/s