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Valorisation of avocado seeds: extraction and characterisation of starch for textile applications

机译：鳄梨种子的增值：用于纺织应用的淀粉的提取和表征

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摘要

Sustainable disposal of the waste is problematic due to increasing shortages of landfill space. Avocado is a common fruit that is widely consumed in many countries. This consumption results in large quantities of avocado waste being generated by the avocado processing industries. However, avocado seeds contain large amounts of starch that could be beneficiated. Starch is widely used in various industrial applications and is routinely sourced from food crops, thus competing with traditional sources of food. Alternative non-food sources of starch are needed. This work focused on ascertaining the cleaner way of extracting starch from avocado seeds for use in industrial applications. The starch was extracted from avocado seeds via a wet extraction method and tested for application in the textile industry. Optimal conditions for the extraction of starch were determined using statistically designed experiments employing a Box–Behnken design and Statistica 13 software for the experimental design, statistical analysis and optimisation of the extraction process. The analysis of variance results revealed that a quadratic model is significant for the factors and responses studied. A quadratic mathematical model was developed, and the optimum combination of a response factor was obtained by the simultaneous optimisation of the responses. The starch yield was 64% (on dry weight basis). Analysis of the extracted starch showed that it contained well over 90% starch content. Application of the starch in textile applications showed that it performed as well as a commercial starch sample. The collection and processing of waste avocado seeds can be a new source of employment and provide income generation opportunities.
机译：由于垃圾掩埋空间的日益短缺，废物的可持续处理存在问题。鳄梨是一种常见的水果，在许多国家被广泛食用。这种消耗导致鳄梨加工业产生大量鳄梨废料。但是，鳄梨种子中含有大量可能被选为淀粉的淀粉。淀粉广泛用于各种工业应用中，通常来自粮食作物，因此可与传统粮食来源竞争。需要替代性的非食物淀粉来源。这项工作的重点是确定从鳄梨种子中提取淀粉以用于工业应用的更清洁方法。通过湿提取法从鳄梨种子中提取淀粉，并测试了其在纺织工业中的应用。使用Box-Behnken设计和Statistica 13软件进行统计设计的实验来确定淀粉提取的最佳条件，该软件用于实验设计，统计分析和提取过程的优化。方差结果分析表明，二次模型对于所研究的因素和响应具有重要意义。建立了二次数学模型，并通过同时优化响应获得了响应因子的最佳组合。淀粉产率为64％（以干重计）。提取淀粉的分析表明，其淀粉含量超过90％。淀粉在纺织品中的应用表明它的性能与商业淀粉样品一样好。鳄梨废种子的收集和加工可以成为一种新的就业来源，并提供创收机会。

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