Development of a new model of olives de-stoner machine: Evaluation of electric consumption and kernel characterization

Leone, Alessandro; Romaniello, Roberto; Peri, G.; Tamborrino, Antonia

doi:10.1016/j.biombioe.2015.06.016

Cited by 18 publications

(17 citation statements)

References 35 publications

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“…In order to improve the logic of the process and to optimize the use of the machines for each single phase of the extraction process, in the last few years a new olives de-stoner machine has been developed. [24][25][26][27][28] It is characterized by an innovative system to separate the specific fraction of stone (from 0% to 100% of olive stone fragments) leaving. Thus, it is possible to remove a variable amount of pits from the paste while the remaining amount is retained in the paste to be sent to the next malaxation operation.…”

Section: Introductionmentioning

confidence: 99%

Partial De‐Stoning of Olive Paste to Increase Olive Oil Quality, Yield, and Sustainability of the Olive Oil Extraction Process

Tamborrino

Servili

Leone

et al. 2020

Euro J Lipid Sci & Tech

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Stone recovery in the olive oil extraction process can be an opportunity to increase both incomes and environmental sustainability. To this aim a new partial de-stoning machine (called Moliden) is installed at the first stage of an olive oil extraction plant to investigate its influence on the quality and sustainability of the extraction process. Quantitative and qualitative results are compared with those achieved using a conventional extraction process. Despite the 60% of stone recovered, no significant differences are registered for oil yield and extractability. A high-quality biomass is recovered by the partial de-stoner machine, belonging to A1 class quality when compared to the standard of the wood pellet, with the only exception of the moisture content. The partial de-stoning also improves the extra virgin olive oil (EVOO) quality in terms of hydrophilic phenols resulting in an enhancement of bitter and pungent sensory notes and most of all provides a beneficial effect for human health. Practical Applications: The new concept of partial de-stoner machine proposed in this work allows reducing the equipment employed in the extraction process of olive oil, since it consists of two sections: crushing and de-stoning. When compared with a standard unit, which recover pits from pomace, it provides a higher quality stone to be used as a biomass fuel. This leads to economic benefits for the millers and has a significant impact on the environmental sustainability of the process.

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Section: Introductionmentioning

confidence: 99%

Partial De‐Stoning of Olive Paste to Increase Olive Oil Quality, Yield, and Sustainability of the Olive Oil Extraction Process

Tamborrino

Servili

Leone

et al. 2020

Euro J Lipid Sci & Tech

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“…The SF, recovered in quantity of 0.126 t/t olives, help to increase the income of oil mill (about 3024 Euro/day) because their use as fuel, widespread in Italy, allows to sell them at a price not lower than 120 Euro/t. SF, in fact, are constituted of lignin, an organic three‐dimensional complex polymer of phenolic compounds, and are a good natural fuel because they have a medium‐high value of the lower thermal power (about 17 166 kJ/kg) and their burning leaves a negligible quantity of ash and the produced smokes are almost free of nitrogen and sulfur gaseous compounds .…”

Section: Resultsmentioning

confidence: 99%

“…The technology of the double extraction of olive oil was already used in the past, when the pressing system was used , but also in more recent years, when oil mills have adopted the more effective new centrifugal decanter at two‐ and three‐phases . In addition, the same oil mills have improved the value of the solid by‐product by the use of a stoner machine, useful to separate and recover part of SF from olive pomace . However, it is known that the second extraction of olive oil from olive paste already centrifuged may cause a change of some characteristics of virgin olive oil and, therefore, the present work had the purpose to ascertain the effects of the complex diagram of olive processing, adopted in some Italian big‐sized oil mills, on the quality and composition of the obtained virgin olive oils, on the characteristics of the by‐products and on the economy of the process.…”

Section: Introductionmentioning

confidence: 99%

Double extraction of olive oil in large oil mills of Southern Italy: Effects on extraction efficiency, oil quality, and economy of the process

Giovacchino

Preziuso

Serio

et al. 2016

Euro J Lipid Sci & Tech

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In recent years, in Italy, some large oil mills, equipped with centrifugal decanter at high loading capacity have adopted the complex diagram of the double extraction of oil and, in addition, have been supplied with suitable machine to recover part of stone fragments from olive pomace with the aim to reduce the costs. Our experimental tests were carried out in a large oil mill, located in Apulia region, which processes olives of Olea europaea L. “Coratina” cultivar by double centrifugation of olive pastes prepared by using the double crushing (millstones and metallic crusher) or the single crushing (metallic crusher). The results showed that the oil yield of the first extraction was high (between 85 and 86%), regardless to the method used for olive crushing. The quality of virgin olive oil of the first extraction was extra virgin with some differences due to the different batches of olives and, in part, also to the used crushing methods. The oil of the second extraction was recovered in a low quantity (0.3 kg/100 kg olives) and its composition was not normal only for the percentage of triterpene dialcohols. The recovery of stone fragments was satisfying (about 0.13 t/t olives) and helped to significantly increase the income of oil mill. Practical applications: The double extraction of oil, by the centrifugation system, and the recovery of SF allow to reduce the costs of olive processing in medium‐big sized oil mills. The second centrifugation, which permits to recover about 3 kg of oil/t of olives, and the recovery of SF, suitable to sell as fuel, allow to increase the income of oil mill. The double extraction of oil, by the centrifugation system and the recovery of olive stone fragments (SF) allow to reduce the costs of olive processing in medium‐big sized oil mills. The second centrifugation, which permits to recover about 3 kg of oil/t of olives, and the recovery of SF, suitable to sell as fuel, allow to increase the income of oil mill.

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“…Increasing attention has recently been focused on the use of decanter machines that use energy and water resources efficiently, as well as the promotion of sustainable consumption [13,[16][17][18][19][20][21][22]. The specific decanters are characterized by the large application of the three-phase water saving and two-phase decanters [23,24].…”

Section: Introductionmentioning

confidence: 99%

Modelling Energy Consumption and Energy-Saving in High-Quality Olive Oil Decanter Centrifuge: Numerical Study and Experimental Validation

et al. 2019

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In this study, an energy consumption model of a decanter centrifuge was proposed, in particular for a technologically evolved machine equipped with an electromechanical recovery system. This model should be suitably coupled with an auto-adaptive controlling technique used to accurately manage the olive oil process. To achieve this goal, a solid physical and theoretical basis that simple to implement is required. To date there have only been limited scientific studies modelling energy consumption applied to the machines used in olive oil extraction processes. Therefore, the model was developed using fluid dynamic analysis and physical constraints to give it a solid basis. It was then simplified sufficiently for future implementation in automatic machine systems. The empirical model was validated through power measurements conducted in two harvesting seasons under varying operating conditions. The model estimates the power absorbed by the bowl and that produced and recovered by the screw, with high accuracy in each harvesting season. When considering the two harvesting seasons as a single season, the prediction accuracy remains considerable, despite a marginal increase in errors (correlation coefficient greater than 0.90). Finally, the model indicates that the screw conveyor speed is the most important parameter to achieve the desired energy recovery level, while the differential speed, which is a process parameter, has only a negligible impact on energy saving.

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Development of a new model of olives de-stoner machine: Evaluation of electric consumption and kernel characterization

Cited by 18 publications

References 35 publications

Partial De‐Stoning of Olive Paste to Increase Olive Oil Quality, Yield, and Sustainability of the Olive Oil Extraction Process

Partial De‐Stoning of Olive Paste to Increase Olive Oil Quality, Yield, and Sustainability of the Olive Oil Extraction Process

Double extraction of olive oil in large oil mills of Southern Italy: Effects on extraction efficiency, oil quality, and economy of the process

Modelling Energy Consumption and Energy-Saving in High-Quality Olive Oil Decanter Centrifuge: Numerical Study and Experimental Validation

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