Toxicity and organic content characterization of olive oil mill wastewater undergoing a sequential treatment with fungi and photo-Fenton oxidation

Justino, Celine I.L.; Duarte, Kátia; Loureiro, Filipe; Pereira, Ruth; Antunes, Sara C.; Marques, Sérgio M.; Gonçalves, Fernando; Rocha-Santos, Teresa; Freitas, Ana C.

doi:10.1016/j.jhazmat.2009.08.028

Cited by 65 publications

(36 citation statements)

References 41 publications

(67 reference statements)

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“…Before the encapsulation (immobilization procedure), mycelium of P. sajor caju was grown in a liquid medium containing 20 g/L of malt extract and 1 g/L of peptone during 11 days, at 25°C and 120 ± 10 rpm. After growth, the mycelium was collected by filtering the culture medium through a sterilized gaze, and kept in sterilized plastic containers at 4°C, until fungus immobilization (Ferreira et al 2008;Freitas et al 2009;Justino et al 2009;Rocha-Santos et al 2010;Justino et al 2010). Before the immobilization procedure, the filtered mycelium was processed using a commercial homogenizer (Taurus, Portugal).…”

Section: Biological Materials and Culture Conditionsmentioning

confidence: 99%

“…(Justino et al 2010). A 25 % (v/v) of OMW was used for the treatment since the efficiency of biological treatment depends on composition and dilution of the OMW (Ferreira et al 2008;Justino et al 2009). Dilutions were made with deionised water and the following additives were added to the diluted OMW: 1.0 g/L of potassium dihydrogen phosphate, 0.405 g/L of diammonium tartrate dibasic, and 0.05 g/L of yeast extract.…”

Section: Fungi Immobilizationmentioning

confidence: 99%

“…Dilutions were made with deionised water and the following additives were added to the diluted OMW: 1.0 g/L of potassium dihydrogen phosphate, 0.405 g/L of diammonium tartrate dibasic, and 0.05 g/L of yeast extract. pH was adjusted to 4.02 ± 0.05 before starting treatment (Ferreira et al 2008;Justino et al 2009). …”

Section: Fungi Immobilizationmentioning

confidence: 99%

“…The treated samples were then analyzed for relative absorbance ratio and COD. The samples after 28 days of treatment were also evaluated for phenolic and other organic compounds previously targeted by Justino et al (2009).…”

Section: Omw Treatmentmentioning

confidence: 99%

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Removal of phenolic compounds in olive mill wastewater by silica–alginate–fungi biocomposites

Duarte

Justino

Panteleitchouk

et al. 2013

Int. J. Environ. Sci. Technol.

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This study aims to attempt a treatment strategy based on fungi immobilized on silica-alginate (biocomposites) for removal of phenolic compounds in olive oil mill wastewater (OMW), OMW supplemented (OMWS) with phenolic compounds and water supplemented (WS) with phenolic compounds, thus decreasing its potential impact in the receiving waters. Active (alive) or inactive (death by sterilization) Pleurotus sajor caju was encapsulated in alginate beads. Five beads containing active and inactive fungus were placed in a mold and filled with silica hydrogel (biocomposites). The biocomposites were added to batch reactors containing the OMW, OMWS and WS. The treatment of OMW, OMWS and WS by active and inactive biocomposites was performed throughout 28 days at 25°C. The efficiency of treatment was evaluated by measuring the removal of targeted organic compounds, chemical oxygen demand (COD) and relative absorbance ratio along the time. Active P. sajor caju biocomposites were able to remove 64.6-88.4 % of phenolic compounds from OMW and OMWS and 91.8-97.5 % in water. Furthermore, in the case of OMW there was also a removal of 30.0-38.1 % of fatty acids, 68.7 % of the sterol and 35 % of COD. The silica-alginate-fungi biocomposites showed a high removal of phenolic compounds from OMW and water. Furthermore, in the application of biocomposites to the treatment of OMW it was observed also a decrease on the concentration of fatty acids and sterols as well as a reduction on the COD.

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Section: Biological Materials and Culture Conditionsmentioning

confidence: 99%

Section: Fungi Immobilizationmentioning

confidence: 99%

Section: Fungi Immobilizationmentioning

confidence: 99%

Section: Omw Treatmentmentioning

confidence: 99%

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Removal of phenolic compounds in olive mill wastewater by silica–alginate–fungi biocomposites

Duarte

Justino

Panteleitchouk

et al. 2013

Int. J. Environ. Sci. Technol.

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“…The salinity of wastewater was high which affected the treatment efficiency. Lefebvre and Moletta reported that coagulationflocculation can be used as a pretreatment of hypersaline effluents to remove their colloidal COD [18]. …”

Section: Coagulation/flocculationmentioning

confidence: 99%

Investigation of effective treatment techniques for Olive mill wastewater

2018

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SELECTION of cost-effective treatment modules for high saline wastewater produced from the olive mill is a challenging task. The aim of this study is to select the most effective technology applied to treat Olive mill wastewater. Several trials using various techniques were carried out to treat wastewater produced from pickling olives and olive oil manufacturing; for instance, anaerobic-aerobic, coagulation/flocculation, and electrocoagulation. The characteristics of olive manufacturing raw wastewater in terms of total dissolved solids (TDS), chemical oxygen demand (COD) and oil and grease were 10032, 9174, and 914.8 mg/l respectively. The results showed that electro-coagulation technique with aluminum electrodes and operating parameters of 30 voltage and 1.5 hours achieved COD removal rate 84%. However, the residual concentration (900 mgO 2 /l) still needs further treatment. Aerobic treatment using activated sludge was applied after electrocoagulation. The results showed that the use aerobic treatment after electrocoagulation is more efficient than the use of anaerobic. Analysis of the treated water showed that the maximum COD removal efficiencies were 98% at optimum conditions. The effluent quality meets the discharge regulatory standard. Consequently, the electrocoagulation followed by aerobic process can be considered as a reliable, safe and costeffective method for the treatment of olive millwastewater.

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