Integrated hydrothermal and deep eutectic solvent-mediated fractionation of lignocellulosic biocomponents for enhanced accessibility and efficient conversion in anaerobic digestion
- Authors
- Basak, Bikram; Patil, Swapnil; Kumar, Ramesh; Ha, Geon-Soo; Park, Young-Kwon; Ali, Khan Moonis; Kumar, Yadav Krishna; Fallatah, Ahmed M.; Jeon, Byong Hun
- Issue Date
- May-2022
- Publisher
- ELSEVIER SCI LTD
- Keywords
- Hydrothermal pretreatment; Deep eutectic solvent; Anaerobic digestion; Biomass fractionation; Lignocellulosic biomass
- Citation
- BIORESOURCE TECHNOLOGY, v.351, pp.1 - 10
- Indexed
- SCIE
SCOPUS
- Journal Title
- BIORESOURCE TECHNOLOGY
- Volume
- 351
- Start Page
- 1
- End Page
- 10
- URI
- https://scholarworks.bwise.kr/hanyang/handle/2021.sw.hanyang/138693
- DOI
- 10.1016/j.biortech.2022.127034
- ISSN
- 0960-8524
- Abstract
- Effective fractionation of lignocellulosic biocomponents of lignocellulosic biomass can increase its utilization in anaerobic digestion for high yield biomethane production. A hydrothermal process was optimized and integrated with a deep eutectic solvent (DES) pretreatment to preferentially fractionate hemicellulose, cellulose, and lignin in rice straw. The optimized hydrothermal process resulted in 96% hemicellulose solubilization at moderately low combined pretreatment severity (log S = 2.26), allowing increased hemicellulosic sugar recovery with minimal formation of inhibitory byproducts. Subsequent DES pretreatment resulted in highly bioaccessible cellulosic pulp, removing 81.3% of lignin that can be recovered and converted into value-added products. Anaerobic digestion of hemicellulosic fraction and cellulosic pulp using a microbial methanogenic consortium seed acclimatized to the lignocellulosic inhibitors resulted in a 33.4% higher yield of methane (467.84 mL g−1 VSinitial) than with anaerobic digester sludge seed. This integrated approach can facilitate and maximize the targeted utilization of different biocomponents through sustainable biorefining.
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