摘要
利用酿酒酵母NL22对乳清粉进行分步糖化发酵(SHF)和同步糖化发酵(SSF),对其生产燃料乙醇的条件进行比较,同时考察pH、温度和底物浓度对SHF和SSF过程的影响。结果表明:SHF工艺和SSF工艺都可以实现酿酒酵母NL22对高浓度乳清粉的发酵,但SSF工艺可明显缩短生产周期,提高生产效率。在pH 6和30℃的条件下进行补料同步糖化发酵,最终乙醇质量浓度为118.52 g/L,产率为1.74 g/(L·h)。
We studied two different processes,namely separate hydrolysis and fermentation（SHF） and simultaneous saccharification and fermentation（SSF）,to produce ethanol from high concentration of whey powder by Saccharomyces cerevisiae NL22.Effects of pH,temperature,and substrate concentration on both process were studied.Both SHF and SSF process produced ethanol efficiently from high concentration of whey powder,but the productivity of SSF was much higher. Under the condition of pH 6 and 30 ℃,118. 52 g/L bio-ethanol was produced by fed-batch SSF with the productivity of 1. 74 g/（L·h）.
出处
《生物加工过程》
CAS
2018年第1期89-94,共6页
Chinese Journal of Bioprocess Engineering
基金
国家自然科学基金组织间合作研究项目(中泰NSFC-NRCT)
江苏省高校自然科学研究重大项目(16KJA220004)
关键词
酿酒酵母
乳清粉
同步糖化发酵
燃料乙醇
Saccharomyces cerevisiae
wheypowder
simultaneous saccharification and fermentation
bio-ethanol
