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Applied biochemistry and biotechnology
2011
Aug
;
(7)
:0
Pretreatment of rice straw by proton beam irradiation for efficient enzyme digestibility.
Kim SB
,
Kim JS
,
Lee JH
,
Kang SW
,
Park C
,
Kim SW
Abstract
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.
DHARA ID:
D015863
Pubmed ID:
21340534
Access to Full Paper Not Available
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