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首页> 外文期刊>Acta Horticulturae >Evaluation of Second Extraction of Olive Oil in Australia
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Evaluation of Second Extraction of Olive Oil in Australia

机译：澳大利亚第二次提取橄榄油的评估

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In Australia, the widespread distribution of olive processing plants, their relatively small throughput and the absence of pomace treatment plants determines that the utilisation of the classical solvent extraction processes to recover the oil remaining in the olive-pomace is virtually impossible and economically unjustifiable. In Europe, and increasingly in other parts of the world, processing plants have been trying the partial extraction of the oil contained in the pomace from the first centrifugation using a second centrifugation. This process is possible if the processing plant has spare processing capacity, if it sets up additional processing lines for second extraction or if it stocks the pomace to be reprocessed at a later time. The objective of this project is to evaluate the technical and economical feasibility of reprocessing olive pomace both in small and large scale processing plants. The processing parameters studied were: re-processing delay, malaxing time and malaxing temperature. In a second extraction process carried out immediately after the first extraction the oil recovery was 37.4%. The increase in the delay between the first and second extraction did not provide significant increments in oil recovery. Malaxing time trials atconstant temperature showed higher oil recoveries with longer malaxing times, whereas temperature trials at constant malaxing time did not show improvements in extractability with higher temperatures. A study of the chemical composition showed that theoil of all the project treatments fell outside any recognised categories according to international legislations for olive oil. The economic feasibility of second extraction practices was evaluated for each plant case.
机译：在澳大利亚，橄榄加工厂的广泛分布，相对较小的产量以及没有果渣处理厂的情况决定了利用传统的溶剂提取工艺来回收残留在橄榄果渣中的油几乎是不可能的，并且在经济上是不合理的。在欧洲以及世界其他地区，加工厂一直在尝试通过第二次离心从第一次离心中部分提取果渣中所含的油。如果加工厂具有闲置的加工能力，设置了额外的加工线以进行第二次提取，或者库存的果渣待以后再加工，则可以进行此过程。该项目的目的是评估在小型和大型加工厂中对橄榄果渣进行再加工的技术和经济可行性。研究的处理参数为：重新处理延迟，错误处理时间和错误处理温度。在第一次萃取之后立即进行的第二次萃取过程中，油的回收率为37.4％。第一次和第二次萃取之间的延迟增加并未显着增加采油量。在恒定温度下进行的放样时间试验显示，在更长的放样时间下，油的采收率更高，而在恒定的放样时间下进行的温度试验并未显示出在较高温度下可采性的改善。对化学成分的研究表明，根据国际橄榄油法规，所有项目处理的油都不属于任何公认的类别。针对每种植物案例评估了二次提取实践的经济可行性。

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