Oil crop wastes as substrate candidates for enhancing erythritol production by modified Yarrowia lipolytica via one-step solid state fermentation. (December 2019)

• Record Type: Journal Article
• Authors: Liu, Xiaoyan; Yan, Yubo; Zhao, Pusu; Song, Jie; Yu, Xinjun; Wang, Zhipeng; Xia, Jun; Wang, Xiaoyu
• Is Part Of: Bioresource technology. Volume 294(2019)
• Publication Date: 2019-12
• Subjects: Erythritol production -- Oil crop wastes -- One-step solid state fermentation -- Modified Yarrowia lipolytica -- Repeated-batch fermentation -- Nitrogen-rich cultivation; Biomass -- Periodicals; Biomass energy -- Periodicals; Bioremediation -- Periodicals; Agricultural wastes -- Periodicals; Factory and trade waste -- Periodicals; Organic wastes -- Periodicals; Bioénergie -- Périodiques; Déchets agricoles -- Périodiques; Déchets industriels -- Périodiques; Déchets organiques -- Périodiques; Déchets (Combustible) -- Périodiques; 662.88
• DOI: 10.1016/j.biortech.2019.122194
• Languages: English
• ISSNs: 0960-8524

Abstract

Graphical abstract: Highlights: Oil crop wastes were utilized as potential substrates for erythritol cultivation. One-step SSF for erythritol production by a modified strain M53-S was implemented. Enhanced erythritol yield of 185.4 mg/gds was achieved in optimized conditions. This process showed advantages of both low material cost and short culture cycle. Erythritol was continuously produced for 7 cycles in repeated-batch fermentation. Abstract: Oil crop wastes are attractive feedstocks in microbial processes due to their low cost. However, the product yields can be limited by their undesirable nitrogen surplus. Present study proposed a one-step solid state fermentation (SSF) method for producing erythritol from unrefined oil crop wastes using a modified strain Y. lipolytica M53-S. Enhanced erythritol production (185.4 mg/gds) was obtained from peanut press cake mixed with 40% sesame meal and 10% waste cooking oil. The process was performed at pH 4.0 in 5 L flasks, with initial moisture content, NaCl addition, and inoculum size of 70%, 0.02 g/gds, and 7.5 × 10 4 cells/gds, respectively. This procedure showed advantages in terms of lower material cost than that of submerged fermentation and shorter culture cycle (96 h) than other SSF processes. In repeated-batch fermentation, erythritol was continuously produced for seven cycles. This study presents a feasible approach in developing an efficient erythritol cultivation from nitrogen-rich wastes.