Kinetics of aerobic treatment of olive-mill wastewater (OMW) with Aspergillus terreus

Hoyos, Sofia Esperanza Garrido; Nieto, Leonardo Martín; Rubio, F. Camacho; Cormenzana, Alberto Ramos

doi:10.1016/s0032-9592(01)00332-6

Cited by 52 publications

(16 citation statements)

References 7 publications

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“…Many studies have been published on the biological OMW treatment under aerobic [10,[20][21][22] or anaerobic conditions [2,23,24]. However, high organic load especially phenolic compounds were found to inhibit the efficiency of anaerobic digestion and make OMW recalcitrant to biological degradation [20,25]. In some cases, advanced oxidation processes (AOPs) should be considered as a viable alternative [26,27].…”

Section: Introductionmentioning

confidence: 99%

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

Kallel

Belaid

Boussahel³

et al. 2009

Journal of Hazardous Materials

159

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Section: Introductionmentioning

confidence: 99%

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

Kallel

Belaid

Boussahel³

et al. 2009

Journal of Hazardous Materials

159

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“…A wide variety of stand-alone and integrated processes for the treatment of OMW have already been proposed and developed but have not yet led to completely satisfactory results (Borja et al, 2006), such as lagooning or natural evaporation and thermal concentration (Annesini and Gironi, 1991;Paraskeva and Diamadopoulos, 2006), composting (Cegarra et al, 1996;Papadimitriou et al, 1997), treatments with clay (Al-Malah et al, 2000) or with lime (Aktas et al, 2001), biological processes (Ena et al, 2007;Garrido et al, 2002;Marques, 2001;Hodaifa et al, 2008), physico-chemical procedures including coagulation-flocculation (Sarika et al, 2005), electro-coagulation (Inan et al, 2004;Tezcan et al, 2006) and biosorption , advanced oxidation processes comprising ozonation (Beltrán et al, 2000), Fenton's reaction (Martínez-Nieto et al, 2011a;Hodaifa et al, 2013b) and photocatalysis (Sacco et al, 2012), electrochemical treatments (Papastefanakis et al, 2010) and hybrid processes (Grafias et al, 2010;Lafi et al, 2009).…”

Section: Introductionmentioning

confidence: 99%

Recovery of iron after Fenton-like secondary treatment of olive mill wastewater by nano-filtration and low-pressure reverse osmosis membranes

2016

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SUMMARY:In this work, the performances of novel nano-filtration (NF) and low-pressure reverse osmosis (RO) polymeric membranes were examined with the aim of recovering the iron used as catalyst in former secondary treatment based on the Fenton-like advanced oxidation of olive mill wastewater (OMW). Results highlight that both membranes exhibit a good performance towards the rejection of iron (99.1% for the NF membrane vs. 100% for the low-pressure RO membrane) in the secondary-treated OMW effluent, thus permitting the recovery of iron in the concentrate stream in order to recycle it back into the oxidation reactor to reduce catalyst consumption. Finally, the permeate streams could be re-used for irrigation. Major productivity was observed by the selected NF membrane, about 47.4 L/hm 2 upon 9 bar, whereas 30.9 L/hm 2 could be yielded with the RO membrane under an operating pressure of 8 bar. Moreover, a sensibly lower fouling index was measured on the NF membrane (0.0072 in contrast with 0.065), which ensures major steady-state performance on this membrane and a longer service lifetime. This also results in lower required membrane area and membrane plant over dimension (4 modules in case of RO operation whereas only 2 modules for NF). KEYWORDS: Iron recovery; Nano-filtration; Olive mill wastewater; Reverse osmosis; Wastewater treatment RESUMEN:Recuperación de hierro tras tratamiento secundario tipo Fenton de agua residual de la industria oleícola por membranas de nanofiltración y ósmosis inversa de baja presión. En este trabajo, se examinó el rendimiento de membranas modernas de nanofiltración (NF) y ósmosis inversa (OI) poliméricas con el objetivo de recuperar el hierro utilizado como catalizador en un tratamiento secundario previo de agua residual oleícola (OMW) basado en oxidación avanzada tipo Fenton. Los resultados ponen de relieven que ambas membranas exhiben buen rendimiento en cuanto al rechazo de hierro (99.1 % para la membrana de NF vs. 100 % para la membrana de OI de bajas presiones) en el efluente oleícola tras tratamiento secundario, permitiendo en consecuencia la recuperación de hierro en la corriente de concentrado para su recirculación de nuevo al reactor de oxidación para reducir el consumo de catalizador. Finalmente, las corrientes de permeado podrían ser reutilizadas para riego. Por otro lado, la productividad asegurada por la membrana de NF seleccionada fue mayor, en torno a 47.4 L/hm 2 a 9 bar, mientras que 30.9 L/hm 2 pudieron ser producidos por la membrana de OI bajo una presión operativa de 8 bar. Además, un índice de fouling sensiblemente menor fue medido en la membrana de NF (0.0072 en contraste con 0.065), lo que asegura mayor rendimiento en estado estacionario para esta membrana, y mayor vida de servicio. Además, ello también resultó en una menor área de membrana y sobredimensionamiento de la planta requeridas (4 módulos en caso de OI mientras que sólo para NF).

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“…Hence, biological treatment of OMW is currently not applied at industrial scale (Ammary, 2005;Ena et al, 2007;Fountoulakis et al, 2002;Garrido et al, 2002;Hodaifa et al, 2008;Marques, 2001).…”

Section: Introductionmentioning

confidence: 99%

The importance of pretreatment tailoring on the performance of ultrafiltration membranes to treat two-phase olive mill wastewater

Pulido¹

2015

Grasas y Aceites

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SUMMARY:In this work, the performance of an ultrafiltration (UF) membrane in the treatment of the effluents by-produced by olive mills is addressed by applying different pretreatments on the raw effluents. By conducting a photo-catalytic process (UV/TiO 2 PC) after pH-temperature flocculation (pH-T F) higher threshold flux values were observed for all feed stocks than by applying solely the pH-T F process, with an 18.8-34.2% increment. In addition, the performance of the UF membrane was also improved in terms of rejection efficiency, such that higher rejection values were yielded by the membrane for the organic pollutants (R COD ) by 48.5 vs. 39.9% and 53.4 vs. 42.0%. The UF membrane performance was also improved in terms of the volume feed recovery factor (VFR), achieving up to 88.2 vs. 87.2% and 90.7 vs. 89.3%. Results in the same line were also observed when the highly polluted olives oil washing wastewater raw stream was previously mixed with the effluent stream coming from the washing of the olives. This permits the UF to permeate, achieving the standard limits to reuse the purified effluent for irrigation purposes (COD values below 1000 mg·L −1 ), which makes the treatment process cost-effective and results in making the olive oil production process environmentally friendly. KEYWORDS: Olive mill wastewater; Pretreatment tailoring; Threshold flux; Ultrafiltration; Wastewater treatmentRESUMEN: La importancia del pretratamiento focalizado para el rendimiento de las membranas de ultrafiltración en el tratamiento de las aguas residuales de la industria oleícola. En este estudio se aborda el rendimiento de una membrana de ultrafiltración (UF) para el tratamiento de los efluentes generados por la industria oleícola, mediante la aplicación de distintos pretratamientos. Tras aplicar un proceso fotocatalítico (UV/TiO 2 PC) después de una floculación pH-temperatura (pH-T F) se observaron flujos límite para todos los efluentes mayores que tras la aplicación únicamente del proceso pH-T F, con incrementos del 18.8-34.2 %. Además, el rendimiento de la membrana de UF mejoró en términos de eficiencia de rechazo, con mayores valores de rechazo respecto de los contaminantes orgánicos (R COD ), 48.5 vs. 39.9 % y 53.4 vs. 42.0 %. El rendimiento de la membrana mejoró también en términos de recuperación de volumen de alimentación (VRF), alcanzando hasta un 88.2 vs. 87.2 % y 90.7 vs. 89.3 %. Se observaron resultados en la misma línea cuando las aguas residuales del lavado del aceite, altamente contaminadas, fueron previamente mezcladas con el efluente generado en el lavado de las aceitunas. Esto permite que el permeado de la UF cumpla con los límites estándar para la utilización del efluente para riego (valores de la DQO inferiores a 1000 mg L −1 ), favoreciendo la eficiencia económica del proceso de tratamiento y permitiendo que el proceso de producción del aceite de oliva pueda ser respetuoso con el medio ambiente. PALABRAS CLAVE: Agua residual de la industria oleícola; Flujo límite; Pretratamiento focalizado; Tratamiento de ag...

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Kinetics of aerobic treatment of olive-mill wastewater (OMW) with Aspergillus terreus

Cited by 52 publications

References 7 publications

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

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

Recovery of iron after Fenton-like secondary treatment of olive mill wastewater by nano-filtration and low-pressure reverse osmosis membranes

The importance of pretreatment tailoring on the performance of ultrafiltration membranes to treat two-phase olive mill wastewater

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