Stability and Performance Analysis of Bioethanol Production with Delay and Growth Inhibition in a Continuous Bioreactor with Recycle

This paper proposes and analyzes a mathematical model for the production of bioethanol in continuous bioreactor with recycling. The kinetics correspond to use Saccharomyces bayanus fermentation sugars found wastewater from soft drinks. proposed considers product growth latency, which was experimentally batch studies ethanol production. Furthermore, inhibition effect is expressed by modified version classical Andrew’s substrate inhibition. consists only three ordinary differential equations containing minimal number operating parameters, include residence time, glucose feed concentration, recycle ratio fraction biomass removed reactor flow. positivity boundedness solutions were confirmed under reasonable restrictions parameters. stability analysis showed that there value time at an exchange occurs between trivial washout non-washout solutions. critical depends on death rate, purge fraction. Dynamic simulations carried out concentration range 100–250 g/L, commonly used ethanol. An inverse response due effects observed evolution concentrations. Parametric increases ratio, latency has, other hand, substantial concentration. Despite its unstructured nature fact some parameters such as temperature acidity not taken into consideration, managed provide useful results bioreactor-settler key dynamic behavior, could pave way future optimization studies.