文献类型：期刊文献

英文题名：Competition between biodetoxification fungus and lactic acid bacterium in the biorefinery processing chain for production of cellulosic L-lactic acid

作者：Li, Zhibin[1];Zhang, Lingxiao[1];He, Niling[1];Zhang, Bin[1];Bao, Jie[1]

机构：[1]East China Univ Sci & Technol, State Key Lab Bioreactor Engn, 130 Meilong Rd, Shanghai 200237, Peoples R China

年份：2024

卷号：11

期号：1

外文期刊名：BIORESOURCES AND BIOPROCESSING

收录：;EI(收录号：20242216157506);WOS:【SCI-EXPANDED(收录号:WOS:001230267700002)】；

基金：This research was supported by the National Key R&D Program of China (2023YFA0914400), the National Natural Science Foundation of China (32301269), China Postdoctoral Science Foundation (2023M741175), and the Yangfan Project of Science and Technology Committee of Shanghai Municipality (23YF1409900).

语种：英文

外文关键词：Lignocellulose; Biodetoxification; High temperature; L-lactic acid fermentation; Paecilomyces Variotii FN89; Pediococcus acidilactici ZY271

摘要：Biodetoxification fungus selectively degrades toxic inhibitors generated from pretreatment of lignocellulose without consuming fermentable sugars. However, one barrier for practical application is the sustained cell viability in the consequent fermentation step to compete the fermentable sugars with fermenting strains, resulting in sugar loss and reduced target product yield. This study investigated the competitive growth property between the biodetoxification fungus Paecilomyces variotii FN89 and the L-lactic acid bacterium Pediococcus acidilactici ZY271 under varying temperature and lactic acid osmatic stress. The results show that the L-lactic acid bacterium Ped. acidilactici ZY271 showed less thermotolerance to Pae. variotii FN89 at high temperature of 45degree celsius to 50 degree celsius in both synthetic medium and wheat straw hydrolysate. In the higher temperature environment, the growth of the biodetoxification strian failed to compete with the lactic acid fermentation strain and was quickly eliminated from the fermentation system. The high temperature fermentation facilitated a fast transition from the detoxification stage to the fermentation stage for higher production of L-lactic acid.