Sugar recovery from rice straw by dilute acid pretreatment

Sung Bong Kim, Sang Jun Lee, Eun Ji Jang, Sung Ok Han, Chulhwan Park, Seung Wook Kim

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26 Citations (Scopus)

Abstract

Rice straw was pretreated with dilute sulfuric acid in order to decrease the amorphous portion and enhance enzyme accessibility. Dilute acid pretreatment process was optimized using a statistical method, and the relationships between each factor were investigated. Saccharification of pretreated rice straw was then performed, followed by fermentation of glucose, the hydrolysate of the saccharification process. The optimal dilute acid pretreatment process was as follows: temperature 110°C, reaction time 14.02. min, and acid concentration 1.2%. Following dilute acid pretreatment, the solid weight was decreased by about 20% and 73.14% of the theoretical maximum content of xylose was solubilized. Glucose was recovered at a rate of about 90% at 24. h after rice straw was treated with dilute acid. Qualitative analysis such as SEM, XRD, and FT-IR were conducted after the pretreatment process, and the results supported the pretreatment process.

Original languageEnglish
Pages (from-to)183-187
Number of pages5
JournalJournal of Industrial and Engineering Chemistry
Volume18
Issue number1
DOIs
Publication statusPublished - 2012 Jan 25

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Keywords

  • Dilute acid pretreatment
  • Optimization
  • Response surface methodology
  • Saccharification
  • Sulfuric acid

ASJC Scopus subject areas

  • Chemical Engineering(all)

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