Highly efficient production of d-lactic acid from chicory-derived inulin by Lactobacillus bulgaricus

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• 作者：Qianqian Xu ; Ying Zang ; Jie Zhou ; Peng Liu ; Xin Li…
• 关键词：d ; Lactic acid ; Inulin ; Fermentation ; Lactobacillus bulgaricus ; Inulinase
• 刊名：Bioprocess and Biosystems Engineering
• 出版年：2016
• 出版时间：November 2016
• 年：2016
• 卷：39
• 期：11
• 页码：1749-1757
• 全文大小：919 KB
• 刊物类别：Chemistry and Materials Science
• 刊物主题：Chemistry
  Biotechnology
  Industrial Chemistry and Chemical Engineering
  Industrial and Production Engineering
  Waste Management and Waste Technology
  Waste Water Technology, Water Pollution Control, Water Management and Aquatic Pollution
  Food Science
  
• 出版者：Springer Berlin / Heidelberg
• ISSN：1615-7605
• 卷排序：39

文摘

Inulin is a readily available feedstock for cost-effective production of biochemicals. To date, several studies have explored the production of bioethanol, high-fructose syrup and fructooligosaccharide, but there are no studies regarding the production of d-lactic acid using inulin as a carbon source. In the present study, chicory-derived inulin was used for d-lactic acid biosynthesis by Lactobacillus bulgaricus CGMCC 1.6970. Compared with separate hydrolysis and fermentation processes, simultaneous saccharification and fermentation (SSF) has demonstrated the best performance of d-lactic acid production. Because it prevents fructose inhibition and promotes the complete hydrolysis of inulin, the highest d-lactic acid concentration (123.6 ± 0.9 g/L) with a yield of 97.9 % was obtained from 120 g/L inulin by SSF. Moreover, SSF by L. bulgaricus CGMCC 1.6970 offered another distinct advantage with respect to the higher optical purity of d-lactic acid (>99.9 %) and reduced number of residual sugars. The excellent performance of d-lactic acid production from inulin by SSF represents a high-yield method for d-lactic acid production from non-food grains.