Butyrate is to be used as a substrate for single-cell protein production in a chemostat. Assuming Monod type kinetics of cell growth on the substrate and max=0.5h1;KS=25mg/L; YXs=0.45gX/gs;YO2S=1.75gO2/gs. For a substrate concentration in the feed S0=18gss/L : i) Determine the optimum dilution rate (Dop) for maximum biomass productivity (DX) ii) How much is that maximum biomass productivity and its concentration in the reactor (X) ? iii) Available aeration equipment can achieve only an oxygen transfer rate (OTR) of 8gO2/Lh. Will it be sufficient to operate at the Dopt above? Explain your result