Oil mill coadjuvants: Aggregation due to moisture and action on olive-pomace oils

Moya, Manuel; Alcalá, Sonia; Ocaña, María Teresa; Vidal, Alfonso M.; Cara, Cristóbal

doi:10.1016/j.jfoodeng.2018.05.013

Cited by 3 publications

(4 citation statements)

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“…The low value obtained in the present work resulted possibly from sampling in a different season of the year (where differences are frequently found in the acid value of the raw oil that is going to be refined) or due to variations in the process used to produce the acid oil from soapstock (by-product of refining), namely different mineral acid dosings (conventionally it is added to break the soaps). Olive pomace is reported in the literature as having a high content of oil and water depending upon the extraction process used to obtain the olive oil [18,23]. In the present work, the following results were obtained: 15 ± 2 wt.% of lipid content and a moisture content of 31 ± 1 wt.%.…”

Section: Characterization Of Feedstockssupporting

confidence: 62%

“…Acid oil is obtained by acidulation of soapstocks in the presence of sulfuric acid [17]. Olive pomace is a solid by-product from olive oil processing, usually containing pulp, skin, stones, and oil [18]. From the traditional olive press process, Bayram et al [19] indicates that the processing of 1 tonne of olives leads to around 400 kg of solid waste (olive pomace), 200 kg of olive oil, and 600 kg of wastewater containing residual solids and oil.…”

Section: Introductionmentioning

confidence: 99%

“…From the traditional olive press process, Bayram et al [19] indicates that the processing of 1 tonne of olives leads to around 400 kg of solid waste (olive pomace), 200 kg of olive oil, and 600 kg of wastewater containing residual solids and oil. Moya et al [18] specifies the following average composition of the olive pomace: 49% of moisture and volatile matter, 24% of oil, and 27% of solid content. In Portugal, the olive production forecast for 2017 was around 858 thousand tonnes, which was almost twice the 2016 production (around 476 thousand tonnes) [20].…”

Section: Introductionmentioning

confidence: 99%

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Monitoring Enzymatic Hydroesterification of Low-Cost Feedstocks by Fourier Transform InfraRed Spectroscopy

et al. 2019

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Enzymatic hydroesterification is a heterogeneous catalyzed process suitable for the conversion of low-cost feedstocks in biodiesel production, namely, because of its tolerance to high free fatty acid contents. The current study describes the use of Fourier transform infrared spectroscopy (FTIR) to monitor biodiesel production using enzymatic hydroesterification and, as raw materials, acid oil from soapstock and olive pomace oil. Acid oil (~34 wt.% FFA) and olive pomace oil (~50 wt.% FFA) were first hydrolyzed (35 °C, 24 h, 200 rpm, 3 wt.% of lipase from Thermomyces lanuginosus, and 1:0.5 water:oil ratio, w:w), and then enzymatic esterification was performed (35 °C, 7 h, 200 rpm, 2 wt.% of lipase from Thermomyces lanuginosus, and 2:1 molar ratio of methanol to acid). FTIR analyses were conducted on the products using a Jasco FT/IR-4100 with a scanning range of 4000–650 cm−1 at 4 cm−1 spectral resolution and 54 scans. For free fatty acid (FFA) quantification, the C=O band at 1708 cm–1 was used, corresponding to the carboxylic acid, whereas for fatty acid methyl ester (FAME) quantification, the peak corresponding to C=O at 1746 cm−1 was considered, which corresponded to the ester. The results were calibrated using volumetric titration and gas chromatography analyses, concerning FFA and FAME quantification, respectively. The best conditions for analysis were determined, and a calibration method was established. FTIR has shown to be a simple, fast, and clean technique suitable to monitor hydroesterification of low-cost feedstocks.

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Section: Characterization Of Feedstockssupporting

confidence: 62%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Monitoring Enzymatic Hydroesterification of Low-Cost Feedstocks by Fourier Transform InfraRed Spectroscopy

et al. 2019

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“…CaCO3 has a great ability to bind pectin so that with the reduction of pectin, the solvent will more easily into the cell [3]. Moya et al [4] reported that the use of CaCO3 as a coadjuvant could enhance the yield of olive oil. Meanwhile, Tamborrino et al [5] found that the use of CaCO3 acts as an absorption medium to support coalescence.…”

Section: Introductionmentioning

confidence: 99%

Optimization of avocado oil solvent extraction assisted by CaCO₃ as coadjuvant using Response Surface Methodology

Humairah,

Annisa,

Moulana

et al. 2024

IOP Conf. Ser.: Earth Environ. Sci.

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Coadjuvants, such as CaCO3, are essential to improve the effectiveness of the extraction process. This study aimed to assess how the addition of CaCO3 as a coadjuvant impacts the yield of avocado oil through the process of solvent extraction using hexane. Response surface methodology was employed to optimize parameters influencing oil yield during solvent extraction. A Box-Behnken design with three factors and three levels was utilized for the optimization process. Factors involved are, concentration of CaCO3 (1, 1.5, 2%), extraction time (30, 60, 90 min), and temperature of extraction (25, 35, 45 °C). The linear model provided the most accurate fit to the experimental data, substantiated by the highest determination coefficient (R2) value. The experiment showed that the highest yield of avocado oil, reaching 48.06%, was obtained by extracting it under the specified conditions: a CaCO3 concentration of 1.92%, an extraction time of 89.85 minutes, and a temperature of 43 °C. The extraction yield of 48.77±0.14% obtained from the experiments using optimized conditions.

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Elaboration of extra-virgin olive oils rich in oleocanthal and oleacein: pilot plant’s proposal

Vidal

Alcalá

Ocaña

et al. 2020

Eur Food Res Technol

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Oil mill coadjuvants: Aggregation due to moisture and action on olive-pomace oils

Cited by 3 publications

References 28 publications

Monitoring Enzymatic Hydroesterification of Low-Cost Feedstocks by Fourier Transform InfraRed Spectroscopy

Monitoring Enzymatic Hydroesterification of Low-Cost Feedstocks by Fourier Transform InfraRed Spectroscopy

Optimization of avocado oil solvent extraction assisted by CaCO₃ as coadjuvant using Response Surface Methodology

Elaboration of extra-virgin olive oils rich in oleocanthal and oleacein: pilot plant’s proposal

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Oil mill coadjuvants: Aggregation due to moisture and action on olive-pomace oils

Cited by 3 publications

References 28 publications

Monitoring Enzymatic Hydroesterification of Low-Cost Feedstocks by Fourier Transform InfraRed Spectroscopy

Monitoring Enzymatic Hydroesterification of Low-Cost Feedstocks by Fourier Transform InfraRed Spectroscopy

Optimization of avocado oil solvent extraction assisted by CaCO3 as coadjuvant using Response Surface Methodology

Elaboration of extra-virgin olive oils rich in oleocanthal and oleacein: pilot plant’s proposal

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Optimization of avocado oil solvent extraction assisted by CaCO₃ as coadjuvant using Response Surface Methodology