1. IntroductionBio-ethanol production from different feedstocks using micro-bial cells (mainly yeast) has received a great deal of attention inthe last few decades [1]. However, conventional microbial fermen-tation processes have faced obstacles that restrict cost-effectiveand eco-friendly bio-ethanol production. One such obstacle is theadverse effects of excessive glucose concentrations on the micro-bial fermentation process [2]. Attempts to resolve this problemhave been made by employing simultaneous saccharification andfermentation (SSF) in which the production and consumption ofglucose occurs concurrently [3,4], yet SSF is hampered by dif-ferences between the temperature optima of the saccharificationand fermentation processes. Specifically, the optimum tempera-ture of saccharifying enzymes is 45–50◦C, temperatures that aretoo high for fermentation and microbial growth, which are optimalat 25–35◦C [5,6]. Therefore, developing an approach that can over-come the temperature difference between the saccharification andfermentation processes is of utmost importance [7,8].