Olive mill wastewater degradation by Fenton oxidation with zero-valent iron and hydrogen peroxide

Kallel, Monem; Belaid, Chokri; Boussahel, R.; Ksibi, Mohamed; Montiel, A.; Elleuch, Boubaker

doi:10.1016/j.jhazmat.2008.07.006

Cited by 160 publications

(95 citation statements)

References 44 publications

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“…In most cases, these waters are dumped into the environment untreated. The inadequate and uncontrolled disposal methods of OMW to the water bodies pose an environmental concern as these e uents contain appreciable amounts of COD and BOD concentrations and high amounts of microbial growthinhibiting compounds, such as phenolic compounds and tannins [4][5][6].…”

Section: Introductionmentioning

confidence: 99%

Influence of the Process Parameters on the Foam Fractionation Treatment of Olive Mill Wastewater

Matavos-Aramyan

Ghazi-MirSaeed²,

Saeedi-Emadi³

et al. 2016

Scientia Iranica

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Abstract. Olive Mill Wastewater (OMW) is a highly organic load waste produced by the three-phase decanter system used in the processing of olives for oil that has phytotoxic and antibacterial phenolic compounds, which help this waste to resist biological degradation. Foam fractionation has not yet been studied with regard to its potential for treatment of such wastewaters. In the present study, this technique was investigated in a simple model system. The e ects of di erent operational conditions, namely, surfactant concentration, process time, pH, and gas ow rate, were evaluated in this study. Statistical analysis of the fractional factorial design revealed that surfactant concentration, pH, and gas ow rate were the most in uential process parameters. Low surfactant concentration and pH of 3-4 were found to be advantageous in terms of good Chemical Oxygen Demand (COD) removal. More than 80% of COD was removed through a single-stage foam fractionation process. This method has proved to be a feasible technique for the OMW e uent treatment.

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Section: Introductionmentioning

confidence: 99%

Influence of the Process Parameters on the Foam Fractionation Treatment of Olive Mill Wastewater

Matavos-Aramyan

Ghazi-MirSaeed²,

Saeedi-Emadi³

et al. 2016

Scientia Iranica

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“…Besides the oxidation carried out by the hydroxyl radicals the removal of pollutants is also promoted by coagulation and sedimentation. This AOP has been largely studied and good efficiency is reported for the treatment of wastewaters polluted with different organics [8,9]. Fenton reaction was also successfully applied to wastewater consisted only of surfactants [10,11] as well as to real effluents from different resources like chemical or pharmaceutical manufacturers [12,13].…”

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confidence: 99%

Combined Chemical-Biological Treatment of Effluents from Soil Remediation Processes by Surfactants Solutions Flushing

Hallmann¹,

Tomczak-Wandzel²,

Mędrzycka³

2012

Ecological Chemistry and Engineering S

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Abstract:In recent years combined chemical-biological wastewater treatment processes have received increasing interest. In the present study wastewater from soil remediation processes were treated by means of 1-step processes like Fenton, aerobic degradation and 2-steps combined method. The effluents resulting from soil remediation processes consist of high surfactant concentration solutions, mobilized oils and oil-in-water (o/w) emulsions. The effectiveness of wastewater treatment was evaluated by COD reduction and surfactant removal. The application of Fenton process alone showed around 80% of COD and surfactant removal, and in case of aerobic process only 60% of COD and 50% of surfactant removal was accomplished. However, the maximum COD reduction and surfactant removal from wastewater samples, above 90%, was obtained in aerobic degradation with Fenton process as pretreatment. Thus, the Fenton process could be effectively applied as a pretreatment step to improve the reduction of both COD and surfactant from wastewater resulting from soil remediation.

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“…Besides the classical Fenton reaction, there are also some alternative advanced oxidization processes following different pathways, including the Fe(III)/ hydrogen peroxide, Fe(II)/persulfate, zero-valent iron/hydrogen peroxide, zero-valent iron/persulfate and so on (Kallel et al, 2009;Le et al, 2011;Zhen et al, 2012c). In these reactions, different kinds of catalyst other than Fe(II) were applied; and in some persulfate involved reactions, sulfate radicals rather than hydroxyl radicals were produced.…”

Section: Introductionmentioning

confidence: 99%

“…While exposing to sludge, the hydroxyl radicals could change the sludge structure through oxidation reactions, thereby contributing to the sludge conditioning process and improving the sludge dewaterability (Buyukkamaci, 2004;Dewil et al, 2005;Tony et al, 2009). However, Fe(II) salt is easy to be oxidized in the air, and thus hard to be kept (Kallel et al, 2009),which makes the conditioning process difficult to operate.…”

Section: Introductionmentioning

confidence: 99%

“…In ZVI-H 2 O 2 system, ZVI could be oxidized to Fe(II) rapidly by acid due to its highly reductive characteristics (Eq. 5.1) (Kallel et al, 2009). Following that, the Fenton reaction is initiated by HP and Fe(II) (Bremner et al, 2006;Kallel et al, 2009 Due to the oxidization capacity caused by the Fenton-like reaction, the combination of ZVI and hydrogen peroxide (HP) has been used for the decomposition of refractory organics with high removal efficiency achieved.…”

Section: Introductionmentioning

confidence: 99%

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Improving dewaterability of waste activated sludge through advanced oxidization process

Zhou¹

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The production of excess sludge in biological wastewater treatment processes has been a serious issue for the operation of wastewater treatment plants (WWTPs) on both economic and environmental sides. To reduce the volume of sludge to be disposed of, the sludge dewaterability needs to be improved through conditioning processes. Many conditioning methods have been developed and applied for this purpose. Among them, the advanced oxidization process is a promising technique due to its high efficiency, and economical and environmental advantages. The aim of this thesis is to apply a series of novel advanced oxidization techniques on sludge conditioning process for the improvement of sludge dewaterability, such as the indigenous iron activated peroxidation and zero-valent iron (ZVI)/hydrogen peroxide, zero-valent iron/persulfate. Also, the role of extracellular polymeric substances (EPS) during the advanced oxidization process was also investigated to expand the knowledge of basic mechanism on the sludge dewaterability.Capillary suction time stands for the time needed for completing the filtration of sludge, is used as quantitative indexes for the evaluation of the sludge dewaterability.The indigenous iron was firstly utilized as the substitute for externally supplied iron salt to improve dewaterability of waste activated sludge through catalysing the hydrogen peroxide. Significant improvement in sludge dewaterability was attained after the addition of hydrogen peroxide at 30 mg/g total solid (TS) and 28 mg/g TS under acidic conditions (pH = 3.0), with the highest reduction of capillary suction time being 68% and 56%, respectively, for sludge containing an iron concentration of 56 mg Fe/g TS and 25 mg Fe/g TS, respectively. The observations were due to Fenton reactions between the iron contained in sludge (indigenous iron) and hydrogen peroxide. For the sludge with an insufficient level of indigenous iron, the addition of iron salt was found to be able to improve the sludge dewaterability.To expand the understanding of the indigenous iron activated advanced oxidization process, the effect of indigenous iron activated peroxidation on methane production from waste activated sludge was also investigated. Pre-treatment of waste activated sludge for 30 min at 50 mg H 2 O 2 /g TS and pH 2.0 (iron concentration in sludge was 7 mg/g TS) substantially enhanced waste activated sludge solubilization. Biochemical methane potential tests demonstrated that methane production was II improved by 10% at a digestion time of 16 d after incorporating the indigenous iron activated peroxidation pre-treatment.The combined conditioning process with zero-valent iron and hydrogen peroxide was applied to improve dewaterability of a full-scale waste activated sludge. The combination of ZVI and hydrogen peroxide at pH 2.0 substantially improved the waste activated sludge dewaterability due to Fentonlike reactions. The highest improvement in waste activated sludge's dewaterability was attained at 500 mg ZVI/L and 250 mg hydrogen peroxide/...

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Olive mill wastewater degradation by Fenton oxidation with zero-valent iron and hydrogen peroxide

Cited by 160 publications

References 44 publications

Influence of the Process Parameters on the Foam Fractionation Treatment of Olive Mill Wastewater

Influence of the Process Parameters on the Foam Fractionation Treatment of Olive Mill Wastewater

Combined Chemical-Biological Treatment of Effluents from Soil Remediation Processes by Surfactants Solutions Flushing

Improving dewaterability of waste activated sludge through advanced oxidization process

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