摘要
对1株热带假丝酵母Candida tropicalis在不同的发酵条件下发酵木糖产乙醇的特性进行研究。结果表明:溶氧浓度对乙醇的产量和产率有很大影响,适中的溶氧浓度有利于菌体生长和乙醇的积累;较高的起始菌体浓度和尿素添加量对乙醇的生产积累有促进作用;在碳源和氮源充足的情况下,延长发酵时间,乙醇的产量最高达到25.58 g/L的稳定状态,菌体生长也趋于平稳,浓度为6.54×108/mL。
The characteristics of one Candida tropicalis yeast strain which can produce ethanol from xylose-fermenting was studied under different fermentation conditions.The results showed that dissolved oxygen concentration had a great influence on both the yield and productivity of ethanol,with moderate dissolved oxygen concentration being conducive to cell growth and ethanol accumulation.A higher initial cell concentration and urea are conducive to the yield of ethanol.In the condition of sufficient carbon and nitrogen source,extending the fermentation time,yield of ethanol can reach up to the steady-state of 25.58 g/L while the cell concentration tends to be stable,about 6.54×10^8/mL.The steady state is a dynamic balance due to the equivalent of ethanol production and consumption.
出处
《华中农业大学学报》
CAS
CSCD
北大核心
2010年第6期727-731,共5页
Journal of Huazhong Agricultural University
基金
国家科技支撑计划(2008BAI63B04)资助
关键词
木糖
乙醇
热带假丝酵母
xylose
ethanol
Candida tropicalis
