Goal: The goal of the present work is to analyze the techno-economic viability of a biorefinery to generate ethanol and alcohol-based hand sanitizer from sweet potato waste within the concept of a circular economy. Design / Methodology / Approach: A survey of expenses for a 1000 L.day-1 distilled plant was carried out, and five different market scenarios were evaluated, varying the rate of production of each product. Results: Results show that the higher the production of the hand sanitizer, the more lucrative the scenarios are. The economic breakeven point occurs when the percentage of the alcohol-based hand sanitizer production is equal to 34%. However, the project becomes economically attractive from the production rate of 39%. The scenario for 80% of alcohol-based hand sanitizer production resulted in NPV of US$ 913,140.92, IRR of 64%, with a discounted payback of 0.72 year. Limitations of the investigation: It was considered that all the production was sold, which is in line with the current market demand. However, if the market slows down, the sales and the revenue obtained may be lower. Practical implications: The production of hand sanitizer from sweet potato waste is an opportunity to meet the market needs in scenarios such as the COVID-19 pandemic. Besides, the proposed biorefinery promotes the development of the circular economy through waste minimization. Originality / Value: No studies about the production of ethanol and alcohol-based hand sanitizer from sweet potato waste in an integrated way and the simulation of different real market scenarios were found.

中文翻译：

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COVID-19背景下的甘薯废弃物中乙醇和酒精类洗手液的循环经济模型

目标：当前工作的目标是分析生物炼油厂在循环经济概念下从甘薯废物中产生乙醇和酒精类洗手液的技术经济可行性。设计/方法/方法：对1000 L.day-1蒸馏厂的费用进行了调查，并评估了五个不同的市场情况，从而改变了每种产品的生产率。结果：结果表明，洗手液的产量越高，这种情况就越有利可图。当酒精类洗手液的生产百分比等于34％时，就会达到经济收支平衡点。但是，该项目从39％的生产率开始就具有了经济吸引力。假设以酒精为基础的洗手液产量为80％，则净现值为913,140.92美元，内部收益率为64％，折现的投资回收期为0.72年。调查的局限性：认为所有产品都已售出，符合当前市场需求。但是，如果市场放缓，则销售和获得的收入可能会降低。实际意义：在诸如COVID-19大流行的情况下，用红薯废料生产洗手液是满足市场需求的机会。此外，拟建的生物精炼厂通过减少废物来促进循环经济的发展。原创性/价值：尚未发现以集成方式从甘薯废料生产乙醇和酒精类洗手液的研究，也没有对不同实际市场情况进行模拟的研究。认为所有产品都已售出，这符合当前的市场需求。但是，如果市场放缓，则销售和获得的收入可能会降低。实际意义：在诸如COVID-19大流行的情况下，用红薯废料生产洗手液是满足市场需求的机会。此外，拟建的生物精炼厂通过减少废物来促进循环经济的发展。原创性/价值：尚未发现以集成方式从甘薯废料生产乙醇和酒精类洗手液的研究，也没有对不同实际市场情况进行模拟的研究。认为所有产品都已售出，这符合当前的市场需求。但是，如果市场放缓，则销售和获得的收入可能会降低。实际意义：在诸如COVID-19大流行的情况下，用红薯废料生产洗手液是满足市场需求的机会。此外，拟建的生物精炼厂通过减少废物来促进循环经济的发展。原创性/价值：尚未发现以集成方式从甘薯废料生产乙醇和酒精类洗手液的研究，也没有对不同实际市场情况进行模拟的研究。在诸如COVID-19大流行的情况下，用红薯废料生产洗手液是满足市场需求的机会。此外，拟建的生物精炼厂通过减少废物来促进循环经济的发展。原创性/价值：尚未发现以集成方式从甘薯废料生产乙醇和酒精类洗手液的研究，也没有对不同实际市场情况进行模拟的研究。在诸如COVID-19大流行的情况下，用红薯废料生产洗手液是满足市场需求的机会。此外，拟建的生物精炼厂通过减少废物来促进循环经济的发展。原创性/价值：尚未发现以集成方式从甘薯废料生产乙醇和酒精类洗手液的研究，也没有对不同实际市场情况进行模拟的研究。