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Thermal assisted alkaline pretreatment of rice husk for enhanced biomass deconstruction and enzymatic saccharification: Physico-chemical and structural characterization

Bioresource Technology, ISSN: 0960-8524, Vol: 263, Page: 199-206
2018
  • 56
    Citations
  • 0
    Usage
  • 118
    Captures
  • 0
    Mentions
  • 185,960
    Social Media
Metric Options:   Counts1 Year3 Year

Metrics Details

  • Citations
    56
  • Captures
    118
  • Social Media
    185,960
    • Shares, Likes & Comments
      185,960
      • Facebook
        185,960

Article Description

Thermal assisted alkaline pretreatment (TAAP) of rice husk (RH) was investigated to facilitate enzymatic saccharification by enhancing the enzyme accessibility to cellulosic components. Statistically guided experiments based on the Box-Behnken design involving four factors viz. biomass loading, particle size, NaOH loading and reaction time was considered for optimization. The maximum sugar yield of 371 mg g −1 biomass was obtained at optimized pretreatment condition [biomass loading (10% w/w), particle size (0.25–0.625 mm), NaOH loading (2% w/w), and reaction time (40 min)]. The TAAP of RH resulted in the efficient removal of lignin (14.9–54% (w/w)) with low hemicellulose solubilization [10.7–33.1% (w/w)] and with a simultaneous increase in cellulose concentration [32.65–51.65% (w/w)]. The SEM analysis indicated increased porosity and biomass disruption during TAAP. The FTIR analysis showed progressive removal of noncellulosic constituents, and XRD analysis revealed an increase in cellulose crystallinity post-TAAP indicating the effectiveness of pretreatment.

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