Brewers spent grains (BSG) represents ≤85% of a brewery's solid waste and common disposal to landfill is increasingly more difficult. Yet BSG is a food‐grade by‐product with potential economic valorization that can significantly improve resource efficiency and reduction in carbon emissions. This study investigated valorization of BSG through the application of novel high solids hydrothermal processing technology in a small‐scale biorefinery, annexed to a brewery. It focused on three scenarios for the production of: (A) the sugar replacement xylitol; (B) prebiotic xylo‐oligosaccharide (XOS); and (C) co‐production of xylitol and XOS. Economic assessment was conducted by comparing the capital and operating expenditure from process simulations created in Aspen Plus®. The process models developed were supplemented with experimental data to improve accuracy.

中文翻译：

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酿造商啤酒糟价格的技术经济分析：木糖醇和木糖寡糖的生产

啤酒厂的废谷物（BSG）占啤酒厂固体废物的≤85％，并且难以将其普遍丢弃到垃圾填埋场。然而，BSG是具有潜在经济价值的食品级副产品，可以显着提高资源效率并减少碳排放。这项研究通过在啤酒厂附近的小型生物精炼厂中应用新型高固体水热加工技术，研究了BSG的增值作用。它集中于三种生产方案：（A）替代糖的木糖醇；（B）益生元低聚木糖（XOS）; （C）木糖醇和XOS的联合生产。通过比较在Aspen Plus中创建的过程模拟的资本和运营支出来进行经济评估®。开发的过程模型补充有实验数据，以提高准确性。