%0 Journal Article
%T Impact of fermentation system initial status on oscillations in very high gravity ethanol continuous fermentation process and analysis of fermentation efficiency improvement<br>初始条件对高浓度乙醇连续发酵过程的影响及振荡行为提高发酵效率的机理分析
%A Yu Shen
%A Xumeng Ge
%A Fengwu Bai Engineering Research Center for Waste Oil Recovery Technology
%A Equipment
%A Ministry of Education
%A Chongqing Technology
%A Business University
%A Chongqing
%A China
%A <br>申渝
%A 葛旭萌
%A 白凤武
%J 生物工程学报
%D 2010
%I 
%X 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).
%K very high gravity continuous ethanol fermentation
%K oscillation
%K Saccharomyces cerevisia
%K fermentation efficiency improvement<br>高浓度乙醇连续发酵，振荡，酿酒酵母，发酵效率提高
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=90BA3D13E7F3BC869AC96FB3DA594E3FE34FBF7B8BC0E591&jid=A66E90C274451689E69F6F0291467824&aid=DFEE21B05BD309F516C7CFCBA4120D2F&yid=140ECF96957D60B2&vid=96C778EE049EE47D&iid=94C357A881DFC066&sid=1A0C7C60D40EFD74&eid=5568599C60D4BE87&journal_id=1000-3061&journal_name=生物工程学报&referenced_num=0&reference_num=0