Combined effect of hot water and deep eutectic solvent (DES) pretreatment on a lignocellulosic biomass mixture for improved saccharification efficiency

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Author list: Gundupalli, Marttin Paulraj; Anne Sahithi S.T.; Jayex, Elizabeth Panakkal; Asavasanti, Suvaluk; Yasurin, Patchanee; Cheng, Yu-Shen; Sriariyanun, Malinee;

Publisher: Elsevier

Publication year: 2022

Volume number: 17

Issue number: 100986

Start page: 1

End page: 9

Number of pages: 9

ISSN: 2589-014X

eISSN: 2589-014X

URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-85125364361&doi=10.1016%2fj.biteb.2022.100986&partnerID=40&md5=9ab24e7df93e828462a1979564f991d1

Languages: English-Great Britain (EN-GB)

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Abstract

The combined effect of hot water (HW) and deep eutectic solvent (DES) on the solubilization of hemicellulose and lignin present in a lignocellulose mixture (rice straw, napier grass, and sugarcane bagasse in a 1:1:1 ratio) was investigated. The selected DES for present study included choline chloride (ChCl) with urea (U), glycerol (G), and lactic acid (LA) at a molar ratio of 1:2 w/w. The selection of different lignocellulosic biomass was made taking into account the similar percentage of hemicellulose and lignin. The hot water and DES pretreatment was performed with biomass loading of 1:10 w/v, 121 °C, 40 min. and 130 °C, 95 min, and 150 rpm, respectively. The HW-ChCl-LA resulted in 4.51-fold increase in cellulose digestibility at 72 h (20.63 ± 0.68% to 93 ± 3.62%). The FTIR spectrum for pretreated solids showed significant changes in the wavelength related to hemicellulose and lignin. © 2022 Elsevier Ltd

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