Integrated hydrothermal and deep eutectic solvent-mediated fractionation of lignocellulosic biocomponents for enhanced accessibility and efficient conversion in anaerobic digestion

Bikram Basak, Swapnil Patil, Ramesh Kumar, Geon Soo Ha, Young Kwon Park, Moonis Ali Khan, Krishna Kumar Yadav, Ahmed M. Fallatah, Byong Hun Jeon

Research output: Contribution to journalArticlepeer-review

40 Scopus citations

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.

Original languageEnglish
Article number127034
JournalBioresource Technology
Volume351
DOIs
StatePublished - May 2022

Keywords

  • Anaerobic digestion
  • Biomass fractionation
  • Deep eutectic solvent
  • Hydrothermal pretreatment
  • Lignocellulosic biomass

Fingerprint

Dive into the research topics of 'Integrated hydrothermal and deep eutectic solvent-mediated fractionation of lignocellulosic biocomponents for enhanced accessibility and efficient conversion in anaerobic digestion'. Together they form a unique fingerprint.

Cite this