TY - JOUR T1 - [Impact of fermentation system initial status on oscillations in very high gravity ethanol continuous fermentation process and analysis of fermentation efficiency improvement]. AU - Shen,Yu, AU - Ge,Xumeng, AU - Bai,Fengwu, PY - 2010/8/6/entrez PY - 2010/8/6/pubmed PY - 2012/10/16/medline SP - 604 EP - 9 JF - Sheng wu gong cheng xue bao = Chinese journal of biotechnology JO - Sheng Wu Gong Cheng Xue Bao VL - 26 IS - 5 N2 - Prior research reported the oscillatory behavior characterized by long period and high amplitude during high gravity continuous ethanol fermentations at the dilution rate of 0.027 h(-1). In this paper, high gravity continuous ethanol fermentations using Saccharomyces cerevisia at different dilution rates were carried out. Similar oscillations were observed when the dilution rate was switched to 0.04 h(-1). Both oscillatory and steady processes can be achieved at dilution rates of 0.027 or 0.04 h(-1), which depends on the initial status of the fermentation system. However, compared to steady process at the same dilution rate of 0.04 h(-1), the average residual sugar concentration was lowered by 14.8% for the oscillatory process, while the average ethanol concentration and productivity were increased by 12.6% and 12.3%, respectively. Further investigation revealed that besides the lag time, oscillatory processes were different from steady ones in kinetics because a higher specific growth rate can be achieved at the same residual sugar and ethanol concentrations (increased by 53.8% in average). SN - 1000-3061 UR - https://www.unboundmedicine.com/medline/citation/20684303/[Impact_of_fermentation_system_initial_status_on_oscillations_in_very_high_gravity_ethanol_continuous_fermentation_process_and_analysis_of_fermentation_efficiency_improvement]_ DB - PRIME DP - Unbound Medicine ER -