Optimization of microwave-assisted extraction of carbohydrates from industrial waste of corn starch production using response surface methodology

Tomoki Yoshida, Shuntaro Tsubaki, Yoshikuni Teramoto, Jun ichi Azuma

Research output: Contribution to journalArticlepeer-review

102 Citations (Scopus)

Abstract

Microwave-assisted extraction (MAE) was applied for production of carbohydrates mainly consisting of arabinoxylan from corn pericarp which is an industrial waste of corn starch production by using hot compressed water as a solvent. The solubilization rate increased with increase in heating temperature and reached 75.2% at 220°C. The main extracted materials were carbohydrates consist of glucose, xylose and arabinose indicating solubilization of starch and hemicellulose, while residues were composed of cellulose. Four independent variables (heating temperature, come-up time, heating time and solid to liquid ratio) were optimized for maximizing the carbohydrates yield using the response surface methodology including fractional factorial design, the path of steepest ascent and central composite design. The optimized condition was as follows; heating temperature 176.5°C, come-up time 2. min, heating time 16. min and solid to liquid ratio 1/20 (g/mL), respectively. The maximal yield attained 70.8% of carbohydrates with predominant production of xylo-oligosaccharides.

Original languageEnglish
Pages (from-to)7820-7826
Number of pages7
JournalBioresource Technology
Volume101
Issue number20
DOIs
Publication statusPublished - Oct 2010
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Bioengineering
  • Environmental Engineering
  • Renewable Energy, Sustainability and the Environment
  • Waste Management and Disposal

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