Fig. 6
Response surface plots for optimization of independent fermentation variables to maximize bioethanol production of a co-fermentation of S. cerevisiae TA2 and W. anomalus HCJ2F-19. Plots show the interaction between variables, viz. a temperature and mixing rate, (b) molasses concentration and mixing rate, (c) incubation time and mixing rate, (d) molasses concentration and temperature, (e) incubation time and temperature, and (f) incubation time and molasses concentration. Green, yellow, and red colors represent lower, medium, and higher levels of ethanol yield, respectively