Microwave assisted hydro-distillation of essential oils from wet citrus peel waste
Microwave assisted hydro-distillation of essential oils from wet citrus peel waste
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DOI：
10.1016/j.jclepro.2016.07.108
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发表时间：
2016-11-20
影响因子：
11.1
通讯作者：
Clark, James H.
中科院分区：
文献类型：
--
作者：
Bustamante, Julen;van Stempvoort, Sytze;Clark, James H.
全世界种植的柑橘类水果中有超过30%经过加工，产生大量果皮废料，通常通过传统方法提取柑橘精油，这些方法需要高能源成本，长提取时间和额外的试剂。在这项研究中，一种基于微波辅助水蒸馏（MAHD）的替代技术已被研究，以成功地提取存在于湿柑橘皮废物中的精油，同时降低成本，避免使用添加剂和提高该过程的有效性。为了实现这一目标，考虑了影响该过程的可扩展性的因素，以开发用于工业规模的新的生物精炼模型。精油MAHD的最佳条件涉及照射的废物橙子皮：水的混合物（1：1.5），在两个后续步骤中使用不同的照射功率的总提取时间为20分钟（保持恒定的压力为300毫巴，通过所有的过程）。使用MAHD在脐橙中获得的精油产率占1.8 +/- 0.1%（干基; n = 3），并且与通过常规水蒸馏获得的精油产率（1.7 +/- 0.1%;干基; n = 3）相当。在其他品种的橙子和柑橘类水果中成功测试了所建议方法的适用性，从而有可能应用来自其他废物原料的精油的MAHD，并为未来的工业规模提取工艺提供有吸引力的工艺。(C)2016爱思唯尔有限公司版权所有。
Over 30% of the total citrus fruits grown all over the World are processed, generating large quantities of peel waste from which essential citrus oils are often extracted by traditional methods demanding high energy costs, long extraction times and additional reagents. In this research an alternative technique based on microwave-assisted hydro-distillation (MAHD) has been studied to successfully extract the essential oil present in wet citrus peel waste whilst reducing costs, avoiding the use of additives and improving the effectiveness of the process. To achieve this goal factors affecting the scalability of the process to develop a new bio-refinery model to be used at industrial scale were considered. Optimal conditions for the essential oil MAHD involved the irradiation of a waste orange peel:water mixture (1:1.5) over two subsequent steps using different irradiation powers for a total extraction time of 20 min (keeping a constant pressure of 300 mbar through all the process). The essential oil yield obtained in Navel Navelate oranges using MAHD accounted for 1.8 +/- 0.1% (dry basis; n = 3) and was comparable to that obtained by conventional hydro-distillation (1.7 +/- 0.1%; dry basis; n = 3). The applicability of the suggested methodology was successfully tested in other varieties of orange and citrus fruits leading to the potential to apply MAHD of essential oils from other waste feedstocks and offering an attractive process for future extraction processes at industrial scale. (C) 2016 Elsevier Ltd. All rights reserved.