1) a: if the influent concentration increases, but flow remains the same, what is the predicted response after the system reaches a new steady state?

b: Controlling effluent concentration is a main goal of wastewater engineering design. What practical operational condition could the engineering manipulate to adjust the effluent concentration? Hint: note that the operational engineer does not have control of the influent flow, the influent concentrations, or the dimensions of the treatment tanks (i.e. volume).