Figure 4
Chemostat SA productivities (q SA and r SA ) plotted against D. The rSA vs. D curve is expected to follow a straight line fit with the slope giving Yx,SA true and the intercept giving mSA. The straight line trend is observed for all values except the highest values of D. This is most likely connected to inaccurate measurements at low biomass concentrations, where small amounts of insoluble material inflate the measurements. Accordingly, only the rSA measurements at the D values between 0.1h−1 and 0.5h−1 were considered for the linear regression. Regression model given by equation (1).