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1. Biotechnology Conversion Area, Biofuels Division, CSIR-Indian Institute of Petroleum, Mohkampur, Dehradun, 248 005, Uttarakhand, India 2. Process Modeling and Simulation Area, Separation Process Division, CSIR-Indian Institute of Petroleum, Mohkampur, Dehradun, 248 005, Uttarakhand, India
ISSN:1615-7605
文摘
High temperature ethanol fermentation from sugarcane molasses B using thermophilic Crabtree-positive yeast Kluyveromyces sp. IIPE453 was carried out in batch bioreactor system. Strain was found to have a maximum specific ethanol productivity of 0.688?g/g/h with 92?% theoretical ethanol yield. Aeration and initial sugar concentration were tuning parameters to regulate metabolic pathways of the strain for either cell mass or higher ethanol production during growth with an optimum sugar to cell ratio 33:1 requisite for fermentation. An assessment of ethanol recovery from fermentation broth via simulation study illustrated that distillation-based conventional recovery was significantly better in terms of energy efficiency and overall mass recovery in comparison to coupled solvent extraction–azeotropic distillation technique for the same.