Separation of value-added chemical groups from bio-oil of olive mill waste

Pozo, C. del; Bartrolı́, Jordi; Puy, Neus; Fàbregas, Esteve

doi:10.1016/j.indcrop.2018.08.062

Cited by 47 publications

(13 citation statements)

References 22 publications

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“…During the 90s, a new extraction system for olive oil, the two-phase system, expanded rapidly in Spain. This innovative system contributed to an improvement in the quality of the product and a decrease in water consumption during the process (del Pozo et al, 2018). Even so, during two-phase olive oil processing a huge amount of highly polluting waste (800 kg of olive mill solid waste for one ton of processed olives) is generated in a short period of time (November-February) every year.…”

Section: Introductionmentioning

confidence: 99%

“…Even so, during two-phase olive oil processing a huge amount of highly polluting waste (800 kg of olive mill solid waste for one ton of processed olives) is generated in a short period of time (November-February) every year. The olive mill solid waste (OMSW) is underutilized and often ends up polluting the environment (del Pozo et al, 2018). OMSW is a lignocellulosic by-product with high water content and it is characterized as a highly polluting waste, not only because of the large amount that is generated every year but also due to its composition.…”

Section: Introductionmentioning

confidence: 99%

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Evolution of control parameters in biochemical methane potential tests of olive mill solid waste (OMSW), thermal pre-treated OMSW, and its co-digestion with Dunaliella salina

et al. 2020

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The aim of the present work was to compare the mesophilic anaerobic digestion of untreated olive mill solid waste (OMSW), soft hydrothermal pre-treated OMSW (SHP OMSW) and a co-digestion mixture of 95% OMSW and 5% microalga Dunaliella salina (Co-OMSW). During the co-digestion experiment, the volatile fatty acid accumulation decreased in comparison with that obtained for OMSW and SHP OMSW, reducing the slight inhibition observed during the OMSW and SHP OMSW experiments. Final values of methane yield of 380±1 mL CH4 g -1 VSadded for the OMSW, 424±2 mL CH4 g -1 VSadded for the SHP OMSW and 491±1 mL CH4 g -1 VSadded for the co-OMSW were determined. Two mathematical models, first-order kinetics and modified Gompertz model, were employed to fit the experimental data with the aim of elucidating the anaerobic biodegradation and obtain the kinetic constants. Both models allowed for adequately fitting the experimental results of methane production with time. The kinetic constant, k, of the first-order model increased by 12% for the Co-OMSW compared with the values achieved for OMSW and SHP OMSW. The modified Gompertz model revealed that the maximum methane production rate, Rm, for the Co-OMSW and SHP OMSW increased by 34.7% and 10.3% compared to the value obtained for OMSW.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Evolution of control parameters in biochemical methane potential tests of olive mill solid waste (OMSW), thermal pre-treated OMSW, and its co-digestion with Dunaliella salina

et al. 2020

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“…del Pozo et al [68] reported that an acid based extraction method performed with hexane extraction at pH 12 followed by an ethyl acetate extraction at pH 6 was found better in separating the value-added chemicals such as phenol, ketones, acetic acids, and carboxylic acids from the aqueous and non-aqueous phases of bio-oil. The acetic acid recovered from the bio-oil can be used to produce hydrogen as an energy source in the upgradation process of bio-oil i.e.…”

Section: Solvent Extractionmentioning

confidence: 99%

An overview of recent development in bio-oil upgrading and separation techniques

Panwar

Paul

2020

Environmental Engineering Research

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Bio-oil produced from the fast pyrolysis/hydrothermal liquefaction is gaining popularity worldwide as the forerunner to replace fossil fuel. The bio-oil can be produced from agricultural waste, forest residue, and urban organic waste. It is also called pyrolysis oil, renewable fuel, and has the potential to be used as fuel in many applications. The application of bio-oil as transportation fuel helps to reduce the emission of greenhouse gases and to keep up the ecological balance. The bio-oil has the heating value of nearly half of the diesel fuel i.e. 16-19 MJ/kg; but, the inferior properties such as high water content, high viscosity, low pH, and poor stability hinder bio-oil application as a fuel. Thus, this paper provides a detailed review of bio-oil properties, its limitations and focuses on the recent development of different upgrading and separation techniques, used to date for the improvement of the bio-oil quality. Furthermore, the advantages and disadvantages of each upgrading method along with the application and environmental impact of bio-oil are also discussed in this article.

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“…By-products and waste coming from olive production and olive oil industry are characterized by the presence of phytotoxic components representing an environmental issue [49]. Anaerobic digestion is a suitable technology to produce biogas [50] and pyrolysis is a treatment to recover rich value-added chemical groups from common olive oil residues [51]. Therefore, a consistent number of resources can be valorized providing opportunities for the olive oil industry [52] and eliminating a source of potential pollution [53].…”

Section: Literature Reviewmentioning

confidence: 99%

A Social Analysis of the Olive Oil Sector: The Role of Family Business

et al. 2019

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Extra-virgin olive oil (EVOO) is one of the most popular products in Mediterranean diet. Spain produces about 52% of olive oil with the presence of larger firms; Italy follows with a share of 9% and a production structure characterized instead by small family businesses. A social analysis, based on a multiple-questionnaire, has analyzed the perspectives of 500 consumers conferring their olives to a family-owned olive oil mills (OOMs). This work aims to assess the role of family business evaluating the opportunities associated with the development of circular economy (CE) models. Results show that Italian consumers’ preferences give attention to the use of natural resource and the olive oil is perceived as a natural product. In addition, family owned-OOMs provide a great sense of trust and the relevant role of family within the entire life cycle of olive oil is demonstrated. OOMs that work for residential market are strongly preferred to industrial ones being able to manage single lots of olives belonging to the same customers’ land. The recovery of some by-products represents an opportunity for OOMs and policy support is required to favor the needed generational change, whose absence is perceived as a serious obstacle to the future development of the sector along circularity principles.

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Separation of value-added chemical groups from bio-oil of olive mill waste

Cited by 47 publications

References 22 publications

Evolution of control parameters in biochemical methane potential tests of olive mill solid waste (OMSW), thermal pre-treated OMSW, and its co-digestion with Dunaliella salina

Evolution of control parameters in biochemical methane potential tests of olive mill solid waste (OMSW), thermal pre-treated OMSW, and its co-digestion with Dunaliella salina

An overview of recent development in bio-oil upgrading and separation techniques

A Social Analysis of the Olive Oil Sector: The Role of Family Business

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