Treatment of olive mill wastewaters by ozonation, aerobic degradation and the combination of both treatments

Benítez, F. Javier; Beltrán‐Heredia, J.; Torregrosa, Joaquin; Acero, Juan L.

doi:10.1002/(sici)1097-4660(199907)74:7<639::aid-jctb92>3.0.co;2-i

Cited by 76 publications

(35 citation statements)

References 15 publications

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“…[15,25,29,30] The pretreatment is necessary to modify the structure of contaminants by changing them into less toxic and easily biodegradable by-products. [31][32][33] Textile wastewater was also pretreated by photochemical technology followed by an activated sludge process successfully. Acute toxicity measured as luminescence inhibition of vibro fischeri was affected by ozone as a first process.…”

Section: Inhibitory Compoundsmentioning

confidence: 99%

See 1 more Smart Citation

Integration of Advanced Oxidation Technologies and Biological Processes: Recent Developments, Trends, and Advances

Tabrizi¹,

Mehrvar²

2004

J Environ Sci Health A Tox Hazard Subst Environ Eng

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The greatest challenge of today's wastewater treatment technology is to optimize the use of biological and chemical wastewater treatment processes. The choice of the process and/or integration of the processes depend strongly on the wastewater characteristics, concentrations, and the desired efficiencies. It has been observed by many investigators that the coupling of a bioreactor and advanced oxidation processes (AOPs) could reduce the final concentrations of the effluent to the desired values. However, optimizing the total cost of the treatment is a challenge, as AOPs are much more expensive than biological processes alone. Therefore, an appropriate design should not only consider the ability of this coupling to reduce the concentration of organic pollutants, but also try to obtain the desired results in a cost effective process. To consider the total cost of the treatment, the residence time in biological and photochemical reactors, the kinetic rates, and the capital and operating costs of the reactors play significant roles. In this study, recent developments and trends (1996-2003) on the integration of photochemical and biological processes for the degradation of problematic pollutants in wastewater have been reviewed. The conditions to get the optimum results from this integration have also been considered. In most of the studies, it has been shown that the integrated processes were more efficient than individual processes. However, slight changes in the configuration of the reactors, temperature, pH, treatment time, concentration of the oxidants, and microorganism's colonies could lead to a great deviation in results. It has also been demonstrated that the treatment cost in both reactors is a function of time, which changes by the flow rate. The minimum cost in the coupling of the processes cannot be achieved unless considering the best treatment time in chemical and biological reactors individually.

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Section: Inhibitory Compoundsmentioning

confidence: 99%

“…[31] But for the following biological step, it was observed that the best model for degradation of organics obeyed the Grau's [55] model according to the following equation: The very same procedures were followed for the treatment of olive mill wastewater for the ozonation step.…”

Section: Reprintsmentioning

confidence: 99%

Integration of Advanced Oxidation Technologies and Biological Processes: Recent Developments, Trends, and Advances

Tabrizi¹,

Mehrvar²

2004

J Environ Sci Health A Tox Hazard Subst Environ Eng

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“…The main problem is the fact that olive oil production is seasonal; consequently, biological processes are not flexible enough to cope with intermittent operation for a few months per year. Furthermore, aerobic processes generally remain quite prohibitive due to the high cost involved, aside from acclimation problems and partial removal of the organic carbon usually below 90% . Similarly, anaerobic processes require additional treatment as a polishing step and often suffer from the toxic and inhibitory impact of lipids and polyphenols .…”

Section: Introductionmentioning

confidence: 99%

Particle size distribution analysis of chemically enhanced two‐phase membrane filtration for olive mill effluents

Khaligh

Yağcı

Balcik

et al. 2016

J of Chemical Tech & Biotech

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BACKGROUND This study used particle size distribution (PSD) to reveal how chemical conditioning inflicted changes on different chemical oxygen demand (COD) size fractions to improve the potential of two‐phase membrane separation as an effective preliminary step for the sustainable management of olive processing wastewaters. RESULTS Experiments were designed to explore: (i) the potential of membrane separation as a pretreatment step; and (ii) the way in which chemical conditioning improved the removal potential of membrane treatment. Particle size distribution analysis was conducted to observe changes inflicted on different COD size fractions by chemical conditioning. The chemically enhanced membrane process achieved 95% COD removal, reducing the effluent COD to 6000–8000 mg L−1 range and the total phenol down to 100 mg L−1. Chemical conditioning also removed a significant portion of soluble COD, so that the resulting PSD fingerprint in the effluent was properly reshaped to allow effective removal by membrane treatment. CONCLUSION The investigated treatment schemes involving pretreatment of oil wastewater by chemical conditioning together with membrane filtration offered high COD reduction in the effluent and biodegradable permeate when properly diluted for co‐treatment with a compatible wastewater stream. The use of chemical conditioning prior to membrane filtration improved final permeate quality and ultrafiltration membrane flux. © 2016 Society of Chemical Industry

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“…So far, the application of AOTs to a wide variety of organic and inorganic model pollutants of different natures has been investigated in detail 9. 10 However, relatively few studies reported in the literature dealt with their application to actual wastewater cases mainly due to their inability to cope with the complex background matrices and high pollution loads normally encountered in real wastewater 11–16. In fact, extraordinary high oxidant/UV doses and reaction times are necessary which makes the industrial scale stand‐alone application of AOTs unfeasible from the economic point of view 9.…”

Section: Introductionmentioning

confidence: 99%

Advanced oxidation of raw and biotreated textile industry wastewater with O3, H2O2 /UV-C and their sequential application

Arslan

Balcıoğlu

2001

J. Chem. Technol. Biotechnol.

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The advanced chemical oxidation of raw and biologically pretreated textile wastewater by (1) ozonation, (2) H 2 O 2 /UV À C oxidation and (3) sequential application of ozonation followed by H 2 O 2 / UV À C oxidation was investigated at the natural pH values (8 and 11) of the textile ef¯uents for 1 h. Analysis of the reduction in the pollution load was followed by total environmental parameters such as TOC, COD, UV±VIS absorption kinetics and the biodegradability factor, f B . The successive treatment combination, where a preliminary ozonation step was carried out prior to H 2 O 2 /UV À C oxidation without changing the total treatment time, enhanced the COD and TOC removal ef®ciency of the H 2 O 2 /UV À C oxidation by a factor of 13 and 4, respectively, for the raw wastewater. In the case of biotreated textile ef¯uent, a preliminary ozonation step increased COD removal of the H 2 O 2 /UV À C treatment system from 15% to 62%, and TOC removal from 0% to 34%. However, the sequential process did not appear to be more effective than applying a single ozonation step in terms of TOC abatement rates. Enhancement of the biodegradability factor (f B ) was more pronounced for the biologically pretreated wastewater with an almost two-fold increase for the optimized Advanced Oxidation Technologies (AOTs). For H 2 O 2 /UV À C oxidation of raw textile wastewater, apparent zero order COD removal rate constants (k app ), and the second order OH . formation rates (r i ) have been calculated. NOTATION AOXAdsorbable organic halogens BOD 5, o 5-day Biochemical Oxygen Demand at time t = 0 (mg dm À3 ) BOD 5, t 5-day Biochemical Oxygen Demand at treatment time t (mg dm À3 ) COD o Chemical Oxygen Demand at time t =0 (mg dm À3 ) COD t Chemical Oxygen Demand at treatment time t (mg dm À3 ) C OH Concentration of OH . (mol dm À3 ) d Effective path length of UV-C light in the reactor (cm) f B Biodegradability factor (dimensionless) F H Fraction of incident radiation at 254 nm absorbed by H 2 O 2 (dimensionless) I o Incident light¯ux of the UV-C lamp (Einstein dm À3 s À1 ) k app Apparent zero order rate constant for COD abatement (mg dm À3 min À1 ) k OH Rate constant for reaction of pollutants with OH . (dm 3 mol s À1 ) r i Second order rate of initiation of OH . formation (mol dm À3 s À1 ) UV-C Light emission in the spectral wavelength region 180 nm`l`290 nm UV H 2 O 2 Absorbance of H 2 O 2 at 254 nm wavelength (m À1 ) UV T Total absorbance at 254 nm wavelength (m À1 ) UV 254 Absorbance of the wastewater at 254 nm wavelength (m À1 ) f Quantum yield for H 2 O 2 photolysis (dimensionless)

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Treatment of olive mill wastewaters by ozonation, aerobic degradation and the combination of both treatments

Cited by 76 publications

References 15 publications

Integration of Advanced Oxidation Technologies and Biological Processes: Recent Developments, Trends, and Advances

Integration of Advanced Oxidation Technologies and Biological Processes: Recent Developments, Trends, and Advances

Particle size distribution analysis of chemically enhanced two‐phase membrane filtration for olive mill effluents

Advanced oxidation of raw and biotreated textile industry wastewater with O3, H2O2 /UV-C and their sequential application

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