An integrated green fractionation of coconut husk: Hydrothermal and deep eutectic solvent pretreatment for enhanced sugar and lignin production

Wijaya, Candra and Sangadji, Ningsi Lick and Muharja, Maktum and Widjaja, Tri and Riadi, Lieke and Widjaja, Arief (2025) An integrated green fractionation of coconut husk: Hydrothermal and deep eutectic solvent pretreatment for enhanced sugar and lignin production. Bioresource Technology Reports, 29. 102078/1-15. ISSN 2589-014X

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Abstract

Coconut husk was explored for sugar and lignin production using an integrated approach combining hydrothermal treatment (HT) and deep eutectic solvent (DES) pretreatments, followed by enzymatic saccharification, to enhance lignocellulose fraction recovery. Optimized HT conditions yielded 4.802 g/L of total reducing sugars, including 0.223 g/L glucose and 0.998 g/L xylose, with minimal degradation products. Subsequent DES pretreatment with choline chloride and lactic acid effectively removed lignin, recovering high-purity lignin with a native-like structure. The combined pretreatment resulted in a cellulose-rich solid, enhancing saccharification yield by 3.24-fold compared to single pretreatments. This improvement stemmed from the extensive disruption and removal of non-cellulose components, confirmed by solid characterizations. The integrated process demonstrated a synergistic effect, achieving 31.3 % total sugar recovery and 48 % lignin recovery, highlighting the potential of coconut husk as a promising biorefinery feedstock.

Item Type:	Article
Uncontrolled Keywords:	Coconut husk; Hydrothermal pretreatment; Deep eutectic solvents; Enzymatic saccharification; Lignin recovery; Sugars; Lignin
Subjects:	T Technology > TP Chemical technology
Divisions:	Faculty of Engineering > Department of Chemical Engineering
Depositing User:	Lieke Riadi 6116
Date Deposited:	22 Jul 2025 07:58
Last Modified:	22 Jul 2025 07:58
URI:	http://repository.ubaya.ac.id/id/eprint/49074

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