Process intensification strategies for enhanced holocellulose solubilization: Beneficiation of pineapple peel waste for cleaner butanol production

Manisha A. Khedkar, Pranhita R. Nimbalkar, Sanjay P. Kamble, Shashank G. Gaikwad, Prakash V. Chavan, Sandip B. Bankar*

*Corresponding author for this work

Research output: Contribution to journalArticleScientificpeer-review

4 Citations (Scopus)
16 Downloads (Pure)

Abstract

Biorefinery sector has become a serious dispute for cleaner and sustainable development in recent years. In the present study, pretreatment of pineapple peel waste was carried out in high pressure reactor using various pretreatment-enhancers. The type and concentration effect of each enhancer on hemicellulose solubilization was systematically investigated. The binary acid (phenol + sulfuric acid) at 180 °C was found to be superior amongst other studied enhancers, giving 81.17% (w/v) hemicellulose solubilization in liquid-fraction under optimized conditions. Solid residue thus obtained was subjected to enzymatic hydrolysis that resulted into 24.50% (w/v) cellulose breakdown. Treated solid residue was further characterized by scanning electron microscopy and fourier transform infrared spectroscopy to elucidate structural changes. The pooled fractions (acid treated and enzymatically hydrolyzed) were fermented using Clostridium acetobutylicum NRRL B 527 which resulted in butanol production of 5.18 g/L with yield of 0.13 g butanol/g sugar consumed. Therefore, pretreatment of pineapple peel waste evaluated in this study can be considered as milestone in utilization of low cost feedstock, for bioenergy production.

Original languageEnglish
Pages (from-to)937-947
Number of pages11
JournalJournal of Cleaner Production
Volume199
DOIs
Publication statusPublished - 20 Oct 2018
MoE publication typeA1 Journal article-refereed

Keywords

  • Biobutanol
  • Enzymatic hydrolysis
  • Hemicellulose solubilization
  • Pineapple peel
  • Steam explosion

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