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No-Cook Process for Ethanol Production Using Indian Broken Rice and Pearl Millet

机译:使用印度大米和珍珠粟的免煮乙醇生产工艺

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摘要

No-cook process using granular starch hydrolyzing enzyme (GSHE) was evaluated for Indian broken rice and pearl millet. One-factor-at-a-time optimization method was used in ethanol production to identify optimum concentration of GSHE, under yeast fermentation conditions using broken rice and pearl millet as fermentation feedstocks. An acid fungal protease at a concentration of 0.2 kg per metric ton of grain was used along with various dosages of GSHE under yeast fermentation conditions to degrade the grain proteins into free amino nitrogen for yeast growth. To measure the efficacy of GSHE to hydrolyze no-cook broken rice and pearl millet, the chemical composition, fermentation efficiency, and ethanol recovery were determined. In both feedstocks, fermentation efficiency and ethanol recovery obtained through single-step no-cook process were higher than conventional multistep high-temperature process, currently considered the ideal industrial process. Furthermore, the no-cook process can directly impact energy consumption through steam saving and reducing the water cooling capacity needs, compared to conventional high-temperature process.
机译:对于印度碎米和珍珠粟,评估了使用粒状淀粉水解酶(GSHE)的免煮过程。在将破米和珍珠粟作为发酵原料的酵母发酵条件下,一次乙醇生产中一次优化因子的方法用于确定GSHE的最佳浓度。在酵母发酵条件下,将浓度为每公吨谷物0.2 kg的酸性真菌蛋白酶与各种剂量的GSHE一起使用,以将谷物蛋白降解为游离氨基氮,以进行酵母生长。为了测量GSHE水解免煮碎米和珍珠粟的功效,测定了化学成分,发酵效率和乙醇回收率。在这两种原料中,通过单步免蒸工艺获得的发酵效率和乙醇回收率均高于传统的多步高温工艺(目前被认为是理想的工业工艺)。此外,与传统的高温工艺相比,免蒸工艺可通过节省蒸汽直接影响能源消耗并减少水冷却能力的需求。

著录项

  • 作者

    Gohel, Vipul; Duan, Gang;

  • 作者单位
  • 年度 2012
  • 总页数
  • 原文格式 PDF
  • 正文语种 {"code":"en","name":"English","id":9}
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