Potential use of olive mill wastewater in the preparation of functional beverages: A review

Zbakh, Hanaâ; El-Abbassi, Abdelilah

doi:10.1016/j.jff.2012.01.002

Cited by 126 publications

(79 citation statements)

References 108 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Most of the signals appeared to be due to MAG and DAG according to assignments by Sacchi et al [33] with very little contribution from TAG. The lipids content of olive mill wastewater is usually very low ranging from 1.6 to 9.8 g/L [34], which appeared to support the weak signals observed for the HE. Further, it was reported that fats and carbohydrates in olive mill wastewater degraded when they were stored and converted to sludges in open ponds [3], but Saiz-Jimenez et al [32] detected lipids in the studied OMWS.…”

Section: Characteristics Of Omws Feedstockmentioning

confidence: 63%

Pyrolytic Conversion of Olive Mill Wastewater Sludge to Biofuels Using Red Mud as Catalyst

Agblevor¹,

Abdellaoui²,

Halouani³

et al. 2017

IJEPE

View full text Add to dashboard Cite

Abstract:Olive mill wastewater sludge (OMWS) is an environmental pollutant in olive oil industry. The problem stems from the strong odor and poor biodegradability of OMWS because of its high phenolic compounds. In most Mediterranean countries, olive mill wastewater is stored in evaporation ponds and the residual sludge is landfilled for disposal. To address this environmental pollution problem, fluidized bed catalytic pyrolysis of OMWS was developed to produce pyrolysis liquids that are stable, low viscosity (5-7 cP), neutral pH (6-7), and high higher heating value (41 MJ/kg). The pyrolysis was conducted at 400-500°C in a red mud catalyst bed. The yields of the organic fraction were 29-35 mass%; char/coke yield was 20-29 mass%; and gas yield was 24-37 mass%. The 13 C NMR and GC/MS analyses of the liquid products showed predominance of aliphatic hydrocarbons and small fractions of aromatic hydrocarbons and ketones. The composition of these liquid products is in sharp contrast with most lignocellulosic biomass pyrolysis products which are normally rich in aromatic compounds and have very low aliphatic product content. In the absence of the red mud catalyst, the liquid product was viscous and contained acidic compounds.

show abstract

Section: Characteristics Of Omws Feedstockmentioning

confidence: 63%

Pyrolytic Conversion of Olive Mill Wastewater Sludge to Biofuels Using Red Mud as Catalyst

Agblevor¹,

Abdellaoui²,

Halouani³

et al. 2017

IJEPE

View full text Add to dashboard Cite

show abstract

“…The optimum crystallization conditions (T hot = 70˚C, T cold = 5˚C) were selected in order to impose a large temperature gradient in the test solution taking into account the variation of solubility of FA and TCA with temperature. In this series of experiments, solutions were cooled in the same way as the model FA and TCA solutions, in an attempt to examine the potential of the selective recovery of high-added value products (namely PPs, which have important applications as food additives, pharmaceuticals [1]). The cooling crystallization process involves the separation of a solute based on the reduction of its solubility with decreasing temperature.…”

Section: Crystallization Of Mixture Of Fa and Tca In Hot Solutions Bymentioning

confidence: 99%

“…Due to the antioxidant activity of phenolic compounds contained in OMW, a number of researchers have demonstrated that their isolation and subsequent use in the food industry and in pharmaceuticals may have beneficial effects toward a number of human disease, including gastric and intestinal digestion and atherosclerosis [1,2]. On the other hand, the uncontrolled disposal of the produced wastewaters into aquatic receptors has serious environmental consequences leading to water pollution, contamination, eutrophication, etc.…”

Section: Introductionmentioning

confidence: 99%

Application of combined physicochemical techniques for the efficient treatment of olive mill wastewaters

Kontos

Koutsoukos

Paraskeva

2015

Desalination and Water Treatment

View full text Add to dashboard Cite

Olive Mill Wastewaters (OMW), produced from olive processing for the extraction of olive oil by units scattered in the Mediterranean countries, is a hardly degradable byproduct due to very high concentration of organic load of complex composition. Several treatment methods have been proposed for the efficient treatment of OMW, but because of the high operational cost, the application of these methods seems to be prohibitive, as olive mills are small family units and operate only 3-4 months per year. In the present work, the implementation of a combination of physicochemical treatment methods is proposed for the effective treatment of OMW. Initially, a membrane filtration process was used (ultrafiltration, nanofiltration, and reverse osmosis membranes) for the fractionation of OMW in concentrate and permeate streams. OMW was thus sufficiently treated and as a result the final permeate of the reverse osmosis was a pure water stream appropriate for irrigation purposes or for reuse in the OMW premises. The concentrated fraction from NF and RO membranes was further treated, to separate and isolate carbohydrates and the phenolic compounds, through the implementation of adsorption on specific resins. Alternatively, the enriched in phenolic content concentrated fractions could be investigated for the possibility of their selective recovery from the respective solution by cooling crystallization, applied directly to the concentrated fractions. During this process, it is possible to recover a number of components from their solutions according to the respective freezing points. Two Poly-Phenols (PP) contained in the OMW, namely trans-cinnamic acid (TCA) and ferulic acid (FA) were examined for the possibility of their selective extraction from their aqueous solutions by cooling crystallization, in order an operational model of the process to be developed. Initially, short cooling crystallization experiment cycles were done to test the effect of molecular diffusion and convection phenomena to the total PP recovery. Furthermore, crystallization of FA and TCA was followed during one cooling cycle as a function of time past the immersion of a cold surface in hot homogeneous solutions of the test compounds. It was estimated that in the case of mixtures, a total recovery of 66% FA and 50% TCA was achieved. The combination of membrane filtration and cooling crystallization may be quite promising for the development of more effective and integrated exploitation of OMW abiding to the zero waste targets.

show abstract

“…However, these by-products are relatively rich in polyphenols. Polyphenols are bioactive molecules commonly used as antioxidants and antimicrobials in the food industry [3][4][5]. One important alternative is the utilization of by-products from olive tree culture and the olive oil industry as sources of nutrients for animals [6].…”

Section: Introductionmentioning

confidence: 99%

Dietary Administration of Olive Mill Wastewater Extract Reduces Campylobacter spp. Prevalence in Broiler Chickens

et al. 2016

View full text Add to dashboard Cite

Food wastes are sources of compounds that can be used as natural additives in the food and feed industry. The olive oil industry produces two main wastes: aqueous waste (olive mill wastewater) and solid waste (pomace or olive cake). These by-products are rich in phenols, which are antioxidant and antimicrobial compounds able to inhibit or delay the growth of several bacteria in vitro. The dietary effect of both olive mill wastewater polyphenolic extract (OMWPE) and dehydrated olive cake (DOC) on the prevalence of Campylobacter spp. in broiler chickens was investigated. A commercial basal diet was supplemented with either OMWPE-or DOC-enriched maize at two dosages (low: 16%; high: 33%). The prevalence of Campylobacter spp. shedding was evaluated at 21, 35, and 49 days of age. The prevalence of Campylobacter spp. differed among groups only at 49 days of age. Both OMWPE groups showed a lower (p < 0.05) prevalence compared to the control group. The odds ratio evaluation showed that the higher dose of OMWPE reduced the possibility of shedding 11-fold compared to the control group (p < 0.001). These results highlight the potential use of olive by-products against Campylobacter spp. in poultry.

show abstract

Potential use of olive mill wastewater in the preparation of functional beverages: A review

Cited by 126 publications

References 108 publications

Pyrolytic Conversion of Olive Mill Wastewater Sludge to Biofuels Using Red Mud as Catalyst

Pyrolytic Conversion of Olive Mill Wastewater Sludge to Biofuels Using Red Mud as Catalyst

Application of combined physicochemical techniques for the efficient treatment of olive mill wastewaters

Dietary Administration of Olive Mill Wastewater Extract Reduces Campylobacter spp. Prevalence in Broiler Chickens

Contact Info

Product

Resources

About