磁场强化在流体制备系统中氢氧化钠预处理玉米秸秆。
Intensification of sodium hydroxide pretreatment of corn stalk using magnetic field in a fluidic system.
机构信息
State Key Laboratory of Food Science and Technology, Jiangnan University, Wuxi 214122, China; School of Food Science and Technology, Jiangnan University, Wuxi 214122, China; Synergetic Innovation Center of Food Safety and Nutrition, Jiangnan University, Wuxi 214122, China.
State Key Laboratory of Food Science and Technology, Jiangnan University, Wuxi 214122, China; School of Food Science and Technology, Jiangnan University, Wuxi 214122, China.
出版信息
Bioresour Technol. 2016 Nov;220:1-7. doi: 10.1016/j.biortech.2016.08.054. Epub 2016 Aug 13.
To promote NaOH pretreatment of corn stalk (CS), a continuous processing system uniting magnetic field and millimeter-scaled channel flow was established. First, four comparative pretreatments were conducted: (I) CS was pretreated with NaOH under traditional agitation; (II) CS was pretreated with NaOH in a flowing state inside the millimeter-scaled channel; (III) CS was pretreated with NaOH in a flowing state and under a static magnetic field; or (IV) CS was pretreated with NaOH in a flowing state and under a rotating magnetic field. By comparison, the highest pentose (121.22mg/g dry CS) and hexose (287.04mg/g dry CS) yields were obtained in the shortest pretreatment time with Pretreatment IV (8h). Accordingly, the key parameters of Pretreatment IV were optimized as 6.71Hz frequency, 0.50L/min flow rate, and 1.02% NaOH concentration. Under these conditions, 439.24mg sugars were released by 1g dry CS during pretreatment and enzymatic hydrolysis.
为了促进玉米秸秆（CS）的 NaOH 预处理，建立了一个联合磁场和毫米级通道流的连续处理系统。首先，进行了四项对比预处理：（I）在传统搅拌下用 NaOH 预处理 CS；（II）在毫米级通道内的流动状态下用 NaOH 预处理 CS；（III）在静态磁场下用 NaOH 在流动状态下预处理 CS；或（IV）在旋转磁场下用 NaOH 在流动状态下预处理 CS。相比之下，在最短的预处理时间内（8 小时），预处理 IV 获得了最高的戊糖（121.22mg/g 干 CS）和己糖（287.04mg/g 干 CS）产量。因此，优化了预处理 IV 的关键参数为 6.71Hz 频率、0.50L/min 流速和 1.02%NaOH 浓度。在这些条件下，1g 干 CS 在预处理和酶解过程中释放了 439.24mg 糖。
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