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Study on the Pretreatment of Rice Hull to Enhance Enzymatic Saccharification Efficiency  

Bark, Surn-Teh (Bioenergy Crop Research Center, National Institute of Crop Science, RDA)
Koo, Bon-Cheol (Bioenergy Crop Research Center, National Institute of Crop Science, RDA)
Moon, Youn-Ho (Bioenergy Crop Research Center, National Institute of Crop Science, RDA)
Cha, Young-Lok (Bioenergy Crop Research Center, National Institute of Crop Science, RDA)
Yoon, Young-Mi (Bioenergy Crop Research Center, National Institute of Crop Science, RDA)
Kim, Jung Kon (Bioenergy Crop Research Center, National Institute of Crop Science, RDA)
An, Gi Hong (Bioenergy Crop Research Center, National Institute of Crop Science, RDA)
Park, Kwang-Geun (Bioenergy Crop Research Center, National Institute of Crop Science, RDA)
Park, Don-Hee (Interdisciplinary Program of Bioenergy and Biomaterials, Chonnam National University)
Publication Information
Applied Chemistry for Engineering / v.23, no.4, 2012 , pp. 399-404 More about this Journal
Abstract
The objective of this study was to investigate the efficient pretreatment method for bioethanol production from rice hull. Ammonia and sodium hydroxide as an alkaline solution and dilute sulfuric acid as an acidic solution were used in a batch reactor under high-temperature and high-pressure conditions. The highest enzymatic saccharification efficiency of 82.8% and ash removal rate of 94.7% were obtained in the dilute sulfuric acid treated sample after the sodium hydroxide solution treatment. The enzymatic saccharification efficiencies and ash removals of pretreated rice hull samples have very similar variation tendency. This means that the maximum obstructive factor for the enzymatic saccharification of rice hull is the ash (silicate) content in biomass. The findings suggest that the combined sodium hydroxide-dilute sulfuric acid treatment system under high-temperature and high-pressure conditions is a promising pretreatment method to enhance the enzymatic saccharification of the silica-rich biomass.
Keywords
rice hull; silicate; pretreatment; enzymatic saccharification; bioethanol;
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