In the presence of a specific enzyme E, which acts as a homogeneous catalyst, a harmful organic A present in industrial waste water degrades into harmless chemicals. At a given enzyme concentration CE, tests in a laboratory CSTR give the following results: CAO, mmol/m CA, mmol/m t, min 2 0.5 30 5 3 1 6 1 50 6 2 8 11 6 4 14 10 20 16 8 20 24 4 4 We wish to treat 0.1 m/min of this waste water having CAO = 10 mmol/m to 90% conversion with this enzyme at concentration CE. (a) What design do you recommend if a tubular reactor is to be used? Sketch the design. Give the size of the reactor, tell if it should be used with recycle, and if so determine the recycle flow rate (m/min). (b) What arrangement of plug flow and mixed flow reactors would you use to minimize the total volume of reactors needed? Sketch your recommended design and show the size of units selected.