scholarly journals Catalytic Efficiency of Red Mud for the Degradation of Olive Mill Wastewater through Heterogeneous Fenton’s Process

Water ◽  
2019 ◽  
Vol 11 (6) ◽  
pp. 1183 ◽  
Author(s):  
Eva Domingues ◽  
Nelson Assunção ◽  
João Gomes ◽  
Daniela V. Lopes ◽  
Jorge R. Frade ◽  
...  
Keyword(s):  
Hydrogen Peroxide ◽  
Phenolic Acids ◽  
Red Mud ◽  
Catalytic Efficiency ◽  
Olive Mill Wastewater ◽  
Residual Hydrogen ◽  
Simulated Effluent ◽  
Wide Range ◽  
Olive Mill ◽  
Fenton's Process

Olive mill wastewater is a challenging effluent, especially due to its toxicity related to the presence of phenolic compounds. Fenton’s process was analysed on the abatement of phenolic acids typically found in this kind of effluents. To overcome the main drawback of Fenton’s process, a waste from the aluminium industry commonly called red mud was used as a heterogeneous source of iron. The adsorption of simulated effluent on the red mud was negligible. Therefore, the degradation of phenolic acids during Fenton’s process was due to oxidation by hydroxyl radicals. The amount of red mud and hydrogen peroxide were optimized regarding phenolic acids degradation. The optimal conditions leading to the highest removal of contaminants (100% of phenolic acids degradation and 25% of mineralization after 60 min of reaction) were 1 g/L of catalyst and 100 mg/L of hydrogen peroxide. The possibility of recovering treated water for agricultural purposes was evaluated by assessing the toxic impact over a wide range of species. The toxicity observed for the treated samples was mainly related to the residual hydrogen peroxide remaining after treatment.

scholarly journals Biodegradation of Olive Mill Wastewater by Trichosporon Cutaneum and Geotrichum Candidum

2010 ◽  
Vol 61 (4) ◽  
pp. 399-405 ◽  
Author(s):  
Tibela Dragičević ◽  
Marijana Hren ◽  
Margareta Gmajnić ◽  
Sanja Pelko ◽  
Dzoko Kungulovski ◽  
...  
Keyword(s):  
Phenolic Compounds ◽  
Oxygen Demand ◽  
Geotrichum Candidum ◽  
Olive Mill Wastewater ◽  
Trichosporon Cutaneum ◽  
Aerobic Conditions ◽  
Wide Range ◽  
Dark Colour ◽  
Static Conditions ◽  
Olive Mill

Biodegradation of Olive Mill Wastewater by Trichosporon Cutaneum and Geotrichum CandidumOlive oil production generates large volumes of wastewater. These wastewaters are characterised by high chemical oxygen demand (COD), high content of microbial growth-inhibiting compounds such as phenolic compounds and tannins, and dark colour. The aim of this study was to investigate biodegradation of olive mill wastewater (OMW) by yeasts Trichosporon cutaneum and Geotrichum candidum. The yeast Trichosporon cutaneum was used because it has a high potential to biodegrade phenolic compounds and a wide range of toxic compounds. The yeast Geotrichum candidum was used to see how successful it is in biodegrading compounds that give the dark colour to the wastewater. Under aerobic conditions, Trichosporon cutaneum removed 88 % of COD and 64 % of phenolic compounds, while the dark colour remained. Geotrichum candidum grown in static conditions reduced COD and colour further by 77 % and 47 %, respectively. This investigation has shown that Trichosporon cutaneum under aerobic conditions and Geotrichum candidum under facultative anaerobic conditions could be used successfully in a two-step biodegradation process. Further investigation of OMW treatment by selected yeasts should contribute to better understanding of biodegradation and decolourisation and should include ecotoxicological evaluation of the treated OMW.

scholarly journals Treatment of Olive Mill Wastewater and the Use of Polyphenols Obtained After Treatment

2012 ◽  
Vol 1 (1) ◽  
Author(s):  
Semih Otles ◽  
Ilknur Selek
Keyword(s):  
Membrane Filtration ◽  
Iron Oxidation ◽  
Antioxidant Properties ◽  
Olive Mill Wastewater ◽  
Treatment Methods ◽  
Ferrous Iron Oxidation ◽  
Short Period ◽  
Wide Range ◽  
Olive Oil Mills ◽  
Olive Mill

Olive mill wastes are signicant environmental problem especially in Mediterranean areas where they are generated in huge quantities in a short period of time. They are phytotoxic materials because of their high phenol, lipid and organic acid concentrations, but these wastes also contain valuable resources that could be recycled such as a large proportion of organic matter and a wide range of nutrients. The effluent from olive oil mills contains a large amount of polyphenols that have antioxidant properties. The market value of these antioxidants is high and they are commonly used in the food, cosmetics, pharmaceutics and chemical industries. For the management of olive mill wastewater (OMW) and other olive residues, various treatment methods can be used. Many scientists work on more efficient and cheaper treatment alternatives. Due to the great variety of compounds in the waste, several technologies to remove the harmful compounds for the environment should be used single or together. Some of the most used OMW treatments are drying / evaporation, forced evaporation, thermal treatment, centrifugation-ultraltration, electrocoagulation, composting, lagooning, adsorption, powdered activated carbon, filtration, sand filtration, membrane filtration, ultrafiltration, precipitation / flocculation, distillation, electrolysis, co-composting, advanced oxidation processes (AOPs) such as ozonation, hydrogen peroxide / ferrous iron oxidation (the so-called Fentons reagent). Several OMW treatment technologies have been developed aiming at the removal of the main toxic organic compounds. A lot of factors must be considered to choose the treatment methods among them the investment, required area, specic training of the workers, noise and odour emissions and seasonality of production.

scholarly journals Olive Mill Wastewater Valorization in Multifunctional Biopolymer Composites for Antibacterial Packaging Application

2019 ◽  
Vol 20 (10) ◽  
pp. 2376 ◽  
Author(s):  
Laura Sisti ◽  
Grazia Totaro ◽  
Nicole Bozzi Cionci ◽  
Diana Di Gioia ◽  
Annamaria Celli ◽  
...  
Keyword(s):  
In Situ Polymerization ◽  
Virgin Olive Oil ◽  
Antibacterial Properties ◽  
Morphological Characteristics ◽  
Olive Mill Wastewater ◽  
Bioactive Molecules ◽  
Scanning Calorimetry ◽  
Hybrid Filler ◽  
Wide Range ◽  
Olive Mill

Olive mill wastewater (OMW) is the aqueous waste derived from the production of virgin olive oil. OMW typically contains a wide range of phenol-type molecules, which are natural antioxidants and/or antibacterials. In order to exploit the bioactive molecules and simultaneously decrease the environmental impact of such a food waste stream, OMW has been intercalated into the host structure of ZnAl layered double hydroxide (LDH) and employed as an integrative filler for the preparation of poly(butylene succinate) (PBS) composites by in situ polymerization. From the view point of the polymer continuous phase as well as from the side of the hybrid filler, an investigation was performed in terms of molecular and morphological characteristics by gel permeation chromatography (GPC) and X-ray diffraction (XRD); also, the thermal and mechanical properties were evaluated by thermogravimetric analysis (TGA), differential scanning calorimetry (DSC), and dynamic thermomechanical analysis (DMTA). Antibacterial properties have been assessed against a Gram-positive and a Gram-negative bacterium, Staphylococcus aureus and Escherichia coli, respectively, as representatives of potential agents of foodborne illnesses.

Integrating Fenton’s process and ion exchange for olive mill wastewater treatment and iron recovery

2017 ◽  
Vol 39 (3) ◽  
pp. 308-316 ◽  
Author(s):  
Patrícia M. Reis ◽  
Pedro J. M. Martins ◽  
Rui C. Martins ◽  
Licínio M. Gando-Ferreira ◽  
Rosa M. Quinta-Ferreira
Keyword(s):  
Wastewater Treatment ◽  
Ion Exchange ◽  
Olive Mill Wastewater ◽  
Iron Recovery ◽  
Olive Mill ◽  
Fenton's Process

A compact process for the treatment of olive mill wastewater by combining wet hydrogen peroxide catalytic oxidation and biological techniques

2010 ◽  
Vol 183 (1-3) ◽  
pp. 62-69 ◽  
Author(s):  
Samia Azabou ◽  
Wahiba Najjar ◽  
Mohamed Bouaziz ◽  
Abdelhamid Ghorbel ◽  
Sami Sayadi
Keyword(s):  
Hydrogen Peroxide ◽  
Catalytic Oxidation ◽  
Olive Mill Wastewater ◽  
Olive Mill

scholarly journals Treatment of Olive Mill Wastewater and the Use of Polyphenols Obtained After Treatment

2012 ◽  
Vol 1 (1) ◽  
Author(s):  
Semih Otles ◽  
Ilknur Selek
Keyword(s):  
Membrane Filtration ◽  
Iron Oxidation ◽  
Antioxidant Properties ◽  
Olive Mill Wastewater ◽  
Treatment Methods ◽  
Ferrous Iron Oxidation ◽  
Short Period ◽  
Wide Range ◽  
Olive Oil Mills ◽  
Olive Mill

Olive mill wastes are signicant environmental problem especially in Mediterranean areas where they are generated in huge quantities in a short period of time. They are phytotoxic materials because of their high phenol, lipid and organic acid concentrations, but these wastes also contain valuable resources that could be recycled such as a large proportion of organic matter and a wide range of nutrients. The effluent from olive oil mills contains a large amount of polyphenols that have antioxidant properties. The market value of these antioxidants is high and they are commonly used in the food, cosmetics, pharmaceutics and chemical industries. For the management of olive mill wastewater (OMW) and other olive residues, various treatment methods can be used. Many scientists work on more efficient and cheaper treatment alternatives. Due to the great variety of compounds in the waste, several technologies to remove the harmful compounds for the environment should be used single or together. Some of the most used OMW treatments are drying / evaporation, forced evaporation, thermal treatment, centrifugation-ultraltration, electrocoagulation, composting, lagooning, adsorption, powdered activated carbon, filtration, sand filtration, membrane filtration, ultrafiltration, precipitation / flocculation, distillation, electrolysis, co-composting, advanced oxidation processes (AOPs) such as ozonation, hydrogen peroxide / ferrous iron oxidation (the so-called Fentons reagent). Several OMW treatment technologies have been developed aiming at the removal of the main toxic organic compounds. A lot of factors must be considered to choose the treatment methods among them the investment, required area, specic training of the workers, noise and odour emissions and seasonality of production.

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