摘要
在搅拌罐式生物反应器中,考察了乙醇发酵过程中不同溶氧控制条件对菌体量和其它发酵参数的影响。结果表明,溶氧浓度和通气时间是影响菌体生长和乙醇发酵强度的重要因素。通过将溶氧控制在较为合适的水平,发酵48h,菌体密度达到5.5～6亿个/mL,发酵强度为2.7lg/(L·h),比传统发酵分别提高了200%和48.9%。为进一步深入研究溶氧控制策略,实现高密度和高强度乙醇发酵提供了依据。
The effect of different dissolved oxygen concentration on the biomass and other fermentation parameters was investigated in the process of ethanol fermentation using stirred tank fermentor.It showed that dissolved oxygen concentration and aeration time were important factors which influenced the growth of ceils and the ethanol fermentation intensity.At preferred dissolved oxygen level,the biomass amounted to 5.5～6 hundred million/mL and the fermentation intensity reached 2.71g/（L·h） after 48h fermentation, which increased 200% and 48.9% than traditional fermentation.This study might provide foundation for further investigation of optimum dissolved oxygen control strategy in order to achieve the goal of high density and high intensity ethanol fermentation.
出处
《食品与发酵工业》
CAS
CSCD
北大核心
2008年第1期20-23,共4页
Food and Fermentation Industries
基金
国家863计划资助课题(2007AA102359
关键词
溶氧浓度
高密度
乙醇发酵
发酵强度
dissolved oxygen
high cell-density
ethanol fermentation
ethanol intensity
作者简介
硕士研究生
石贵阳教授为通讯作者。
