Journal
BIORESOURCE TECHNOLOGY
Volume 315, Issue -, Pages -Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.biortech.2020.123893
Keywords
Biodiesel; Palm empty fruit bunch; Oleaginous microorganism; Lipid; Simultaneous saccharification and fermentation
Funding
- Agricultural Research Development Agency (ARDA), Thailand
- PSU-Ph.D. scholarship, Graduate School, Prince of Songkla University
- Thailand Research Fund [RTA6280014]
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Consolidated bioprocesses for bioconversion of lignocellulosic biomass into biodiesel feedstocks were developed. Palm empty fruit bunch (EFB) was biologically pretreated coupling with fungal lipid production (121.4 +/- 2.7 mg/g-EFB) by lignocellulolytic oleaginous fungi prior to lipid production by oleaginous yeasts. In subsequent separate hydrolysis and fermentation (SHF) of fungal pretreated EFB (FPEFB), the oleaginous yeast with the maximum lipid yield of 37.0 +/- 0.1 mg/g-FPEFB was screened. While a higher lipid yield of 47.9 +/- 1.5 mg/g-FPEFB was achieved in simultaneous saccharification and fermentation (SSF) with less enzyme requirement. Fed-batch SSF of non-sterile FPEFB was proven as a practical and efficient strategy to increase lipid yield up to 53.4 +/- 0.5 mg/g-FPEFB. Total lipid yield by both fungi and yeast was 165.0 +/- 4.4 mg/g-EFB. Interestingly, the consolidated bioprocesses of enzyme and lipid production also achieved comparable total lipid yield of 149.3 +/- 6.6 mg/g-EFB. These strategies may contribute greatly to cost-effective and sustainable bioconversion of lignocellulosic biomass into biodiesel feedstocks.
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