Olive oil extraction industry wastewater treatment by coagulation and Fenton’s process

Domingues, Eva; Fernandes, Eryk; Gomes, João; Castro‐Silva, Sérgio; Martins, Rui C.

doi:10.1016/j.jwpe.2020.101818

Cited by 40 publications

(22 citation statements)

References 48 publications

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“…Olive oil extraction technologies are summarized in Figure 2. There are two main olive oil extraction processes: traditional oil mills, and a relatively new extraction process known also by continuous mills and characterized by two or three phases [4,5] All the above processes aim at separating the liquid oil phase from the other constituents of the fruit [6]. Likewise, olives should be processed as rapidly as possible after harvesting to reduce oxidation and preserve their quality [7].…”

Section: Olive Oil Extraction Technologiesmentioning

confidence: 99%

“…The pressing process is the oldest method of obtaining olive oil [8]. Owing to lower production efficiency and high labor costs, during the last decade, the discontinuous pressing systems have widely been substituted by continuous systems, along with the development of centrifuge technology [4,9]. After the steps of washing, crushing, and Olive Oil: Extraction Technology, Chemical Composition, and Enrichment Using Natural… DOI: http://dx.doi.org/10.5772/intechopen.102701 mixing, the mechanical extraction of the oil occurs mainly by a continuous process based on centrifugation using a decanter.…”

Section: Olive Oil Extraction Technologiesmentioning

confidence: 99%

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Olive Oil: Extraction Technology, Chemical Composition, and Enrichment Using Natural Additives

Sakar¹,

Gharby²

2022

Olive Cultivation

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Virgin Olive oil (VOO) is considered the primary source of added fat in the Mediterranean diet. Its consumption is linked to numerous health-promoting properties along with its high energetic value. These properties are the results of various chemical compounds (fatty acids, tocopherols, polyphenols, etc.). VOO provides monounsaturated fatty acids, which lower total cholesterol and low-density lipoprotein cholesterol levels. VOO is obtained by three mechanical extraction processes, which can be classified into two systems that can be followed to extract olive oil from olives: the so-called traditional or discontinuous method, and the modern or continuous one. After the extraction of olive oil, its oxidative stability and chemical composition are subjected to deterioration especially when stored under inappropriate conditions (light, O2, temperature, etc.). To deal with the problem, VOO enrichment using natural additives became an important practice to enhance VOO oxidative stability and its chemical composition. In this chapter, various aspects related to VOO extraction processes, chemical composition, stability oxidative and enrichment via natural additives will be reviewed and discussed in light of published literature.

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Section: Olive Oil Extraction Technologiesmentioning

confidence: 99%

Section: Olive Oil Extraction Technologiesmentioning

confidence: 99%

Olive Oil: Extraction Technology, Chemical Composition, and Enrichment Using Natural Additives

Sakar¹,

Gharby²

2022

Olive Cultivation

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“…Spillage and discharge of organic dyes and petroleum pose grave threats to the ecology and health of living organisms. Various techniques, such as oxidation, 1 coagulation, 2 biodegradation, 3 photocatalytic decomposition, 4 and adsorption, 5 have been developed and used to treat dyes and oils. In particular, porous adsorbents with large specific surface areas are highly desired owing to their reusability.…”

Section: Introductionmentioning

confidence: 99%

Electrospun Porous Nanofibers with Imprinted Patterns Induced by Phase Separation of Immiscible Polymer Blends

et al. 2022

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Nanofibrous nonwoven fabrics have attracted attention as porous adsorbents with high specific surface areas for the safe and efficient treatment of spilled organic dyes and petroleum. For this purpose, a method of fabricating porous nanofibers with high specific surface areas would be highly beneficial. In this study, the phase separation in nanofibers electrospun from blended solutions of immiscible polymers [poly(styrene) (PS) and poly(vinylpyrrolidone) (PVP)] was investigated. The removal of PVP as a sacrificial polymer afforded the imprinting of mesopores (40–70 nm) in the PS nanofibers. The effects of solution composition (PS/PVP in N , N -dimethylformamide) on the structure formation in the fibers were investigated. The nanofibers thus obtained could selectively adsorb low-molecular-weight hydrophobic dyes, such as Nile Red and Oil Red O. Thus, it is expected that the combined approach of electrospinning of immiscible polymer blends and phase separation-induced patterning can be applied to the fabrication of functional nanofibers for diverse applications.

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“…Several technologies have been developed to improve the quality of OMW and sequester phenolic and organic compounds [14], including biological methods like the addition of anaerobic [15][16][17] or aerobic cultures [18][19][20], physicochemical [14,[21][22][23][24][25][26] and ozonation with electrocoagulation [27] in addition to chemical methods like using Fenton reagent [28,29], surfactants [21,23], and adsorption processes [6,11,30,31]. Some techniques showed high effectiveness for wastewater treatment application due to their simplicity, no odor emissions, and ease of design but have some limitation such as high cost and toxicity [32].…”

Section: Introductionmentioning

confidence: 99%

Coupling magnetite and goethite nanoparticles with sorbent materials for olive mill wastewater remediation

et al. 2022

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This work aimed at treating OMW by developing an environmentally friendly and cost-effective media capable of removing phenolic compounds upon the interaction between magnetic nanoparticles and sorbent material such as zeolite. Magnetite (Fe3O4) and goethite (FeO(OH)) nanoparticles were prepared using the microemulsion method by using dimethylene-1,2-bis (dodecyl dimethyl ammonium bromide) (CTAB) as a surfactant. The prepared nanoparticles had magnetic properties. X-Ray Diffraction (XRD), and Transmission Electron Microscope (TEM) were used for the structural and morphological characterization. The average crystalline sizes for magnetite and goethite obtained from TEM were 7–16 and 5–14 nm, respectively. The nanocomposite media of magnetite and goethite with zeolite were prepared via coupling natural Jordanian zeolite with magnetic nanoparticles using two approaches; mixing and coating. The adsorption process of phenolic compounds was analyzed by the direct photometric method after treating real samples with nanocomposite media at different conditions. In the batch experiment, the optimum conditions were percent of media to OMW 3%, contact time 3 days, pH of 5, and room temperature. Results revealed that the percent removal of phenolic compounds was 79% and 80% for magnetite/zeolite and goethite/zeolite, respectively using the mixing approach, while with coating approach of magnetite/zeolite, the percentage removal was 75%. A significant improvement of % removal from 61 to 93% was observed with the new composite media of granular activated carbon (GAC) with various percentages to the (Fe3O4, FeO(OH)/zeolite) even at pH of 3.

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Olive oil extraction industry wastewater treatment by coagulation and Fenton’s process

Cited by 40 publications

References 48 publications

Olive Oil: Extraction Technology, Chemical Composition, and Enrichment Using Natural Additives

Olive Oil: Extraction Technology, Chemical Composition, and Enrichment Using Natural Additives

Electrospun Porous Nanofibers with Imprinted Patterns Induced by Phase Separation of Immiscible Polymer Blends

Coupling magnetite and goethite nanoparticles with sorbent materials for olive mill wastewater remediation

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