Journal
BIORESOURCE TECHNOLOGY
Volume 271, Issue -, Pages 210-217Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.biortech.2018.09.056
Keywords
Liquid hot water; Pretreatment; Deep eutectic solvents; Garden waste
Funding
- National Natural Science Foundation of China [51876206, 21476233, 21606230]
- Natural Science Foundation of Guangdong Province [2018A030313012]
- Young Top-Notch Talent of Guangdong Province, China [2016TQ03N647]
- Pearl River S&T Nova Program of Guangzhou, China [201610010110]
- National High-tech RD Program [2015AA020202]
- Science and Technology Planning Project of Guangdong Province, China [2017B020238005]
- Youth Innovation Promotion Association, CAS [2015289]
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Biomass pretreatment can improve the conversion efficiency of bioenergy production. Liquid hot water (LHW) pretreatment is a truly green pretreatment due to its zero chemical use, but has the disadvantages of low lignin removal and pseudo-lignin formation. A modified liquid hot water (MLHW) process based on in situ synthesis of deep eutectic solvent (DES) could efficiently improve delignification of Roystonea regia leaves (LR) and leaf sheaths (LSR). LSR was less recalcitrant than LR, and its characteristics of higher porosity (34.8%) and thinner cell walls (5.2 mu m) for LSR contributed it higher lignin removal (53.6%) and lower choline chloride (ChCl) consumption (H2O-ChCl mass ratio of 2:1) than those (44.6% and 1:2) from LR. Moreover, a great improvement of 309.0% in bio-methane yield was achieved for the MLHW-treated LSR. In addition, in situ DES in MLHW had good biocompatibility with cellulase, microalgae, and yeast.
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