Integrated treatment of olive oil mill effluents (OME): Study of ozonation coupled with anaerobic digestion

Andreozzi, Roberto; Longo, Giovanna P.; Majone, Mauro; Modesti, G.

doi:10.1016/s0043-1354(97)00440-5

Cited by 103 publications

(56 citation statements)

References 16 publications

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“…In the previous few decades, the majority of the research conducted on OME treatment was focused on the use and development of anaerobic methods and bioreactors that can efficiently remove high organic loads [6][7][8][9]. The advantages of anaerobic digestion include low levels of biological sludge, high efficiency and the production of methane, which can be utilized as an energy source for on site heating and electricity.…”

Section: Introductionmentioning

confidence: 99%

Effect of organic loading rate on the performance of an up-flow anaerobic sludge blanket reactor treating olive mill effluent

Azbar

Tutuk

Keskin

2009

Biotechnol Bioproc E

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The primary objective of this study was to evaluate the effects of the organic loading rate on the performance of an up-flow anaerobic sludge blanket (UASB) reactor treating olive mill effluent (OME), based on the following indicators: (i) chemical oxygen demand (COD) removal efficiency; and (ii) effluent variability (phenol, suspended solids, volatile fatty acids, and pH stability). The UASB reactor was operated under different operational conditions (OLRs between 0.45 and 32 kg COD/m 3 ·day) for 477 days. The results demonstrated that the UASB reactor could tolerate high influent COD concentrations. Removal efficiencies for the studied pollution parameters were found to be as follows: COD, 47~92%; total phenol, 34~75%; color, 6~46%; suspended solids, 34~76%. The levels of VFAs in the influent varied between 310 and 1,750 mg/L. Our measurements of the VFA levels indicated that some of the effluent COD could be attributed to VFAs (principally acetate, butyrate, iso-butyrate, and propionate) in the effluent, which occurred at levels between 345 and 2,420 mg/L. As the OLRs were increased, more VFAs were measured in the effluent. A COD removal efficiency of 90% could be achieved as long as OLR was kept at a level of less than 10 kg COD/m 3 ·day. However, a secondary treatment unit for polishing purposes is necessary to comply with discharge standards. © KSBB

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Section: Introductionmentioning

confidence: 99%

Effect of organic loading rate on the performance of an up-flow anaerobic sludge blanket reactor treating olive mill effluent

Azbar

Tutuk

Keskin

2009

Biotechnol Bioproc E

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“…Therefore, the high initial concentration of OMW and the slow removal kinetics of the refractory fraction of OMW pollutants combined with the fact that the refractory fraction also accounts for the colour of these effluents, makes OMW unsuitable for direct treatment by aerobic biological treatments (Niaounakis and Halvadakis 2004). Some physico-chemical pretreatments have therefore been investigated: Low-frequency ultrasound irradiation (Atanassova et al 2005) and ozonation (Andreozzi et al 1998;Beltran-Heredia et al 1999, 2000 both reduce the antioxidant activity of OMW by removing up to 50% of the phenolic compounds, hence facilitating the latter biological treatments. An alternative method for improving the performance of aerobic treatment of OMW is to mix it with municipal wastewaters.…”

Section: Biological Treatmentmentioning

confidence: 99%

“…Solely or combined with other methods (Konstas et al 1994;Andreozzi et al 1998;Sabbah et al 2004;Bertin et al 2004) it is increasingly being used to treat wastewaters, because it allows the recovery of an appreciable fraction of the chemical energy in the waste as methane and it produces much less waste sludge than aerobic processes (Dalis et al 1996;Erguder et al 2000). Due to its high organic content, OMW is suitable for anaerobic treatment, even if high purification efficiencies cannot be achieved (Dalis 1989;Dalis et al 1994;Beccari et al 1996).…”

Section: Anaerobic Processesmentioning

confidence: 99%

Olive oil history, production and by-product management

Kapellakis

Tsagarakis

Crowther

2007

Rev Environ Sci Biotechnol

159

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In this review paper, the history of the olive tree and the development of the main olive oil extraction systems employed in the past are presented. Furthermore, the management techniques employed from antiquity until today for the treatment of olive mill wastewater (OMW), which constitutes the most important by-product of olive oil production, are addressed and compared. Reference is also made to global olive oil production, the environmental impacts of the uncontrolled disposal of OMW, and to the legal framework concerning its management in the main olive oil producing countries. Other byproducts of olive processing are also discussed.

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“…Besides these methods; advanced treatment processes such as ozonation [7]- [8]- [9], photocatalysis [10], electrocoagulation [5]- [11], fenton oxidation [12], ozone and fenton oxidation [13] and wet air oxidation [14] have been tested for olive mill wastewater treatment. However, these processes have a disadvantage of either high operating costs or high sludge quantities which requires additional treatment thereby additional investment and operating cost.…”

Section: Introductionmentioning

confidence: 99%

Electrohydrolysis of Olive Mill Wastewater: Effect of Applied DC Voltage

2017

IJAAEE

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Abstract-The aim of this study is the investigation of electrohydrolysis treatment process for olive mill wastewater in terms of pollutants removal and hydrogen production. For this purpose, Different voltages including 4, 6 and 8 V DC were tested for 3 hours. 8 V DC for 3 hours was found to be as the most effective condition. At this optimum voltage, different time periods were also investigated. At 8 V, significant pollutant removal efficiencies were obtained. 68% turbidity, 70% TSS, 52% COD and 19% sCOD removal efficiencies were achieved. Volume of produced gas was 1500±10 ml and hydrogen percent was determined as 85%. Hydrogen production along with pollutant removal is one of the advantages of electrohydrolysis. Therefore, electrohydrolysis can be proposed as a feasible alternative treatment step for wastewaters which is characterized by high organic matter and also suspended matter.

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Integrated treatment of olive oil mill effluents (OME): Study of ozonation coupled with anaerobic digestion

Cited by 103 publications

References 16 publications

Effect of organic loading rate on the performance of an up-flow anaerobic sludge blanket reactor treating olive mill effluent

Effect of organic loading rate on the performance of an up-flow anaerobic sludge blanket reactor treating olive mill effluent

Olive oil history, production and by-product management

Electrohydrolysis of Olive Mill Wastewater: Effect of Applied DC Voltage

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