원문정보
초록
영어
Acid hydrolysis of process residue of Laminaria japonica using hydrothermal reaction was conducted to maximize the production of reducing sugar (RS) and the response surface methodology (RSM) was applied to study the effects of independent variables, such as reaction temperature (116 ~ 184 ℃), reaction time (12 ~ 28 min.) and hydrochloric acid concentration (HCl, 0.0159 ~ 0.1841 N) on reducing sugar concentration and production yield from the process residue of Laminaria japonica. The reducing sugar production yield was fitted by a second order polynomial quadratic model, which was found to be significant with high coefficient (R2=0.91). The optimized conditions of acid-catalyzed hydrothermal hydrolysis were 142.8 6℃ of the reaction temperature, 18.56 min. of the reaction time and 0.11N of the hydrochloric acid concentration. Under the optimum conditions, the experimental yield of RS was 11.29% (0.1129g-RS/g-dried Laminaria japonica), which was not significantly different with predictive yield of 10.75% (0.1075g-RS/g-dried Laminaria japonica). As a result of F-value analysis, the reaction temperature was found to be more important than reaction time and/or hydrochloric acid concentration.