文献类型：期刊文献

英文题名：Elevating fermentation yield of cellulosic lactic acid in calcium lactate form from corn stover feedstock

作者：Wei, Chengxiang[1];Liu, Gang[1];Zhang, Jian[1,2];Bao, Jie[1]

机构：[1]East China Univ Sci & Technol, State Key Lab Bioreactor Engn, 130 Meilong Rd, Shanghai 200237, Peoples R China;[2]Tsinghua Univ, Minist Educ China, Key Lab Solid Waste Management & Environm Safety, Beijing 10084, Peoples R China

年份：2018

卷号：126

起止页码：415

外文期刊名：INDUSTRIAL CROPS AND PRODUCTS

收录：;EI(收录号：20184305980017);WOS:【SCI-EXPANDED(收录号:WOS:000452346400045)】；

基金：This research was supported by the National Key Research and Development Program of China (2017YFB0309302) Shanghai Pujiang Program, the Fundamental Research Funds for the Central Universities of China (WF1514325, WF1814033), China Postdoctoral Science Foundation (2018M632043), and the Open Funding Project of the Key Laboratory for Solid Waste Management and Environment Safety (SWMES2017-10), Ministry of Education of China, Tsinghua University (Beijing, China).

语种：英文

外文关键词：Chiral lactic acid; Lignocellulose; Calcium lactate; Sodium lactate; Simultaneous saccharification and co-fermentation (SSCF)

摘要：Chiral lactic acid is recovered as sodium lactate or calcium lactate from fermentation broth, then the lactate are released to its lactic acid form as monomer chemical of polylactic acid (PLA). This study investigated the fermentation behaviors of chiral lactic acid from corn stover feedstock when lactic acid was recovered in different lactate forms, calcium lactate or sodium lactate. When chiral lactic acid is recovered in calcium lactate form in the simultaneous saccharification and co-fermentation (SSCF) of corn stover feedstock, L-lactic acid titer reached 130.3 g/L, approximately 14% greater than that in sodium L-lactate form; D-lactic acid titer reached 124.8 g/L, approximately 11.2% greater than that in sodium D-lactate form. The lessened lactate inhibition in calcium lactate form on cellulase activity and cell viability was found to be responsible for the elevated cellulosic L- and D-lactic acid yield. The techno-economic analysis showed the greater economic advantage of chiral lactic acid in calcium lactate than that in sodium lactate. This study provides the strong evidence and simple option for improving cellulosic chiral lactic acid yield.