Six bacterial strains, Bacillus subtilis LQOB-SE1, Bacillus coagulans LQOB-SE2, Bacillus pumilus LQOB-SE3, Brevibacillus brevis LQOB-SE4, Lysinibacillus sp. LQOB-SE5 and Serratia marcescens LQOB-SE6, isolated from a tropical peat soil, were assessed for 2,3-butanediol (2,3-BD) production by fermentation of glucose and glycerol. Only S. marcescens LQOB-SE6 strain was capable of producing 2,3-BD from both glucose and glycerol fermentation, and this process was optimized by changes in fermentation parameters. The best conditions for glycerol fermentation were initial pH 7.0, 8 g L−1 nutrient broth, 50 g L−1 substrate, and an incubation time of seven days, with 2,3-BD yield of 0.30 g g−1, and productivity of 0.13 g L−1 h−1. The best conditions for glucose fermentation were initial pH 7.0, 8 g L−1 nutrient broth, 75 g L−1 substrate, and an incubation time of five days, with 2,3-BD yield of 0.42 g g−1 and productivity of 0.15 g L−1 h−1. meso-2,3-butanediol was the only stereoisomer obtained from glucose fermentation, while glycerol fermentation also produced smaller amounts of (2R,3R)-2,3-butanediol. © 2020 Elsevier Ltd
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- Authors: de A Santos, D., Casari, L.P., Lucas, S.C.O., Romão, L.P.C., Porto, A.L.M.
- Author Affiliation: Universidade de São Paulo, Universidade Federal de Sergipe, Universidade Federal do Sul e Sudeste do Pará
- Subjects: peat soils, tropics, soil organic matter, soil properties, microbial community
- Publication type: Journal Article
- Source: Biocatalysis and Agricultural Biotechnology 26: 101615
- Year: 2020
- DOI: https://doi.org/10.1016/j.bcab.2020.101615