Pretreatment of rice straw by proton beam irradiation for efficient enzyme digestibility

Sung Bong Kim, Jun Seok Kim, Jong Ho Lee, Seong Woo Kang, Chulhwan Park, Seung Wook Kim

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14 Citations (Scopus)


Biomass was pretreated with proton beam irradiation (PBI) in order to enhance enzyme digestibility. Rice straw and soaking in aqueous ammonia (SAA)-treated rice straw were treated with 1-25 kGy doses of PBI at a beam energy of 45 MeV. The optimal doses of PBI for efficient sugar recovery were 15 and 3 kGy for rice straw and SAA-treated rice straw, respectively. When PBI was applied to rice straw at 15 kGy, the glucose conversion reached 68% of the theoretical maximum at 72 h. When 3 kGy of PBI was applied to SAA-treated rice straw, approximately 90% of the theoretical glucose conversion was obtained at 12 h compared to a 89% conversion at 48 h. After 2 h of enzymatic saccharification, the initial reaction rates of raw rice straw pretreated with 15 kGy of PBI and SAA-treated rice straw pretreated with 3 kGy of PBI were 1.4×10-4 and 9.7×10-4 g L-1 s -1, respectively. Further, the results of X-ray diffractometry support the effect of PBI on sugar recovery, whereas scanning electron microscopy images revealed a more rugged rice straw surface.

Original languageEnglish
Pages (from-to)1183-1191
Number of pages9
JournalApplied Biochemistry and Biotechnology
Issue number7
Publication statusPublished - 2011 Aug


  • Biomass
  • Pretreatment
  • Proton beam irradiation
  • Rice straw
  • Saccharification

ASJC Scopus subject areas

  • Biotechnology
  • Bioengineering
  • Biochemistry
  • Applied Microbiology and Biotechnology
  • Molecular Biology


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