Microbial Lipid Production from Corn Stover by the Oleaginous Yeast Rhodosporidium toruloides Using the PreSSLP Process

Xiaozan Dai, Hongwei Shen, Qiang Li, Kamal Rasool, Qian Wang, Xue Yu, Lei Wang, Jie Bao, Dayu Yu and Zongbao K. Zhao
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Xiaozan Dai: Sci-Tech Center for Clean Conversion and High-valued Utilization of Biomass, Jilin Province, Northeast Electric Power University, Jilin 132012, China
Hongwei Shen: Division of Biotechnology, Dalian Institute of Chemical Physics, CAS, Dalian 116023, China
Qiang Li: Division of Biotechnology, Dalian Institute of Chemical Physics, CAS, Dalian 116023, China
Kamal Rasool: Division of Biotechnology, Dalian Institute of Chemical Physics, CAS, Dalian 116023, China
Qian Wang: Division of Biotechnology, Dalian Institute of Chemical Physics, CAS, Dalian 116023, China
Xue Yu: Division of Biotechnology, Dalian Institute of Chemical Physics, CAS, Dalian 116023, China
Lei Wang: Sci-Tech Center for Clean Conversion and High-valued Utilization of Biomass, Jilin Province, Northeast Electric Power University, Jilin 132012, China
Jie Bao: School of Biotechnology, East China University of Science and Technology, Shanghai 200237, China
Dayu Yu: Sci-Tech Center for Clean Conversion and High-valued Utilization of Biomass, Jilin Province, Northeast Electric Power University, Jilin 132012, China
Zongbao K. Zhao: Division of Biotechnology, Dalian Institute of Chemical Physics, CAS, Dalian 116023, China

Energies, 2019, vol. 12, issue 6, 1-10

Abstract: Dry acid pretreatment and biodetoxification (DryPB) has been considered as an advanced technology to treat lignocellulosic materials for improved downstream bioconversion. In this study, the lipid production from DryPB corn stover was investigated by the oleaginous yeast Rhodosporidium toruloides using a new process designated prehydrolysis followed by simultaneous saccharification and lipid production (PreSSLP). The results found that prehydrolysis at 50 °C and then lipid production at 30 °C improved lipid yield by more than 17.0% compared with those without a prehydrolysis step. The highest lipid yield of 0.080 g/g DryPB corn stover was achieved at a solid loading of 12.5%. The fatty acid distribution of lipid products was similar to those of conventional vegetable oils that are used for biodiesel production. Our results suggested that the integration of DryPB process and PreSSLP process can be explored as an improved technology for microbial lipid production from lignocellulosic materials.

Keywords: corn stover; dry acid pretreatment and biodetoxification; microbial lipids; prehydrolysis; Rhodosporidium toruloides (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2019
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (4)

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