Evaluation of biobutanol production from non-pretreated rice straw hydrolysate under non-sterile environmental conditions

Wen Hsing Chen*, Yi Chun Chen, Jih-Gaw Lin

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

40 Scopus citations

Abstract

The study aims to investigate a cost-effective approach to convert non-pretreated rice straw hydrolysate into biobutanol. The influences of the initial cell concentration and incubation temperature on biobutanol production were evaluated under both sterile and non-sterile conditions. Results indicate that 100% glucose utilization could be achieved for initial cell concentrations greater than 2100. mg/L under both sterile and non-sterile conditions. Regression analyses resolve that under the sterile condition, the maximum butanol productivity of 1.45. g/L/d was projected at 1.96. g/L of cells and 32.3. °C, while the maximum butanol yield of 0.22. g/g was predicted at 2.01. g/L of cells and 26.3. °C. These two maximum values could not be projected by the regression analyses for the non-sterile condition. However, this study confirms that a high initial cell concentration of Clostridium saccharoperbutylacetonicum N1-4 can minimize interference from other microbes so that non-sterile biobutanol production is comparable to sterile biobutanol production.

Original languageEnglish
Pages (from-to)262-268
Number of pages7
JournalBioresource Technology
Volume135
DOIs
StatePublished - 1 Jan 2013

Keywords

  • Biofuels
  • Butanol
  • Fermentable sugars
  • Fermentation
  • Rice straw

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