Preliminary Study on Ethanol Fermentation with Very High Gravity and Micro-Aeration Technologies

doi:10.3969/j.issn.1673-1689.2017.06.013

Home > Archive>Volume 36, Issue 6, 2017 >649-656. DOI:10.3969/j.issn.1673-1689.2017.06.013

Preliminary Study on Ethanol Fermentation with Very High Gravity and Micro-Aeration Technologies
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                        10.3969/j.issn.1673-1689.2017.06.013
                    
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Ethanol is widely used in renewable fuels，chemical engineering，medicine and food industry. In developed countries there is a growing trend towards employing modern technologies and ef?cient bio-energy conversion using a range of biofuels. In order to improve Very High Gravity（VHG） ethanol fermentation efficiency the optimization process of VHG ethanol fermentation from liquefied VHG cassava mash filtrate with micro-aeration were investigated in this thesis. Changes of fermentation parameters during the ethanol fermentation from VHG liquefied starch filtrate with aeration rate （0，0.04，0.08，0.16，0.24，0.35 L/min） by Saccharomyces cerevisiae GGSF16 under batch condition in a 5-L bioreactor were studied. The optimum condition for ethanol fermentation was shown as a continuous aeration rate of 0.08 L/min. The verification experiments under the optimum condition clearly indicated that the aeration strategies improved ethanol production. The biomass and fermentation efficiency were 5.40×108 cells/mL and 90.00%，respectively，representing about 56.52% and 2.45% increase compared to anaeration fermentation. In conclusion，micro-aeration can improve VHG ethanol fermentation efficiency because it can enhance cell viability.

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LIU Guangpeng, WANG Juan, WU Shihua, ZHAO Yan, HE Fatao, GE Bangguo, ZHU Fengtao. Preliminary Study on Ethanol Fermentation with Very High Gravity and Micro-Aeration Technologies[J]. Journal of Food Science and Biotechnology,2017,36(6):649-656.

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