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首页> 外文期刊>Cereal Chemistry >Assessing Fermentation Quality of Grain Sorghum for Fuel Ethanol Production Using Rapid Visco-Analyzer.
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Assessing Fermentation Quality of Grain Sorghum for Fuel Ethanol Production Using Rapid Visco-Analyzer.

机译：使用快速粘度分析仪评估谷物高粱用于燃料乙醇生产的发酵质量。

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The Rapid Visco-Analyzer (RVA) was used to characterize the pasting properties of 68 sorghum grains with a standard 23-min temperature profile. The results showed a strong linear relationship between ethanol yield and final viscosity as well as setback. Ethanol yield increased as final viscosity decreased. A modified RVA procedure (10 min) with an application of l-amylase was developed to simulate the liquefaction step in dry-grind ethanol production. There was a remarkable difference in mashing properties among the sorghum samples with the normal dosage of l-amylase. The sorghum samples which were difficult to liquefy in the mashing step had much higher peak viscosities than the samples that were easily liquefied. The results also showed that the relationship between conversion efficiency and mashing property was significant. Tannins cause high mash viscosities. There was a strong linear relationship between tannin content and final viscosity as well as peak viscosity. The modified RVA procedure is applicable not only for characterization of mashing properties but also for optimization of l-amylase doses for starch liquefaction.
机译：快速粘度分析仪（RVA）用于以标准23分钟温度曲线表征68个高粱颗粒的糊化特性。结果表明，乙醇收率与最终粘度和回落之间存在很强的线性关系。乙醇的收率随着最终粘度的降低而增加。开发了一种改良的RVA程序（10分钟），应用了L-淀粉酶，以模拟干磨乙醇生产中的液化步骤。在正常剂量的l-淀粉酶中，高粱样品的糖化特性存在显着差异。在糖化步骤中难以液化的高粱样品的峰值粘度比易于液化的样品高得多。结果还表明，转化效率与糖化性质之间的关系是显着的。单宁会导致高糊状粘度。单宁含量与最终粘度以及峰值粘度之间存在很强的线性关系。改进的RVA程序不仅适用于糖化特性的表征，而且适用于淀粉液化的L-淀粉酶剂量的优化。

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