Conversion of corn stover alkaline pre-treatment waste streams into biodiesel via Rhodococci
- Univ. of Tennessee, Knoxville, TN (United States). Department of Chemical & Biomolecular Engineering; Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Bioscience Division
- Michigan State Univ., East Lansing, MI (United States). Department of Chemical Engineering & Materials Science and Great Lakes Bioenergy Research Center
- Michigan State Univ., East Lansing, MI (United States). Great Lakes Bioenergy Research Center and Department of Biochemistry
- Michigan State Univ., East Lansing, MI (United States). Department of Chemical Engineering & Materials Science, Great Lakes Bioenergy Research Center and Department of Biosystems & Agricultural Engineering
- Texas A & M Univ., College Station, TX (United States). Synthetic and Systems Biology Innovation Hub, Department of Plant Pathology and Microbiology
- Univ. of Tennessee, Knoxville, TN (United States). Department of Chemical & Biomolecular Engineering and Department of Forestry, Wildlife, and Fisheries, Center for Renewable Carbon; Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Bioscience Division
We present the bioconversion of second-generation cellulosic ethanol waste streams into biodiesel via oleaginous bacteria is a novel optimization strategy for biorefineries with substantial potential for rapid development. In this study, one- and two-stage alkali/alkali-peroxide pretreatment waste streams of corn stover were separately implemented as feedstocks in 96 h batch reactor fermentations with wild-type Rhodococcus opacus PD 630, R. opacus DSM 1069, and R. jostii DSM 44719T . Here we show using 31P-NMR, HPAECPAD, and SEC analyses, that the more rigorous and chemically-efficient two-stage chemical pretreatment effluent provided higher concentrations of solubilized glucose and lower molecular weight (70 300 g mol1 ) lignin degradation products thereby enabling improved cellular density, viability, and oleaginicity in each respective strain. The most significant yields were by R. opacus PD 630, which converted 6.2% of organic content with a maximal total lipid production of 1.3 g L1 and accumulated 42.1% in oils based on cell dry weight after 48 h.
- Research Organization:
- Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States). Joint Institute for Biological Sciences (JIBS)
- Sponsoring Organization:
- USDOE Office of Science (SC)
- Grant/Contract Number:
- AC05-00OR22725; EE0006112
- OSTI ID:
- 1356963
- Journal Information:
- RSC Advances, Vol. 7, Issue 7; ISSN 2046-2069
- Publisher:
- Royal Society of ChemistryCopyright Statement
- Country of Publication:
- United States
- Language:
- English
Web of Science
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