Investigation of two ultrafiltration membranes for treatment of olive oil mill wastewater

Akdemir, Ezgi Oktav; Özer, Adem

doi:10.1016/j.desal.2008.06.035

Cited by 94 publications

(34 citation statements)

References 18 publications

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“…On another hand, Akdemir and Ozer [25] applied pH adjustment (acidic or alkaline) and cartridge iltration (20 μm) as pretreatment before UF (MWCO 30-100 kDa) and reported the best performance for the 100 kDa UF membrane, pointing for 1 bar as the critical pressure to reduce fouling issues. Also, Coskun et al [26] examined UF as part of an integral membrane process for OMW-3 reclamation, but did not consider the entity of fouling in the performance of the membranes.…”

Section: Microiltration and Ultrailtration Membranesmentioning

confidence: 99%

On the Purification of Agro-Industrial Wastewater by Membrane Technologies: The Case of Olive Mill Effluents

Ochando-Pulido¹,

Martínez-Férez²

2017

Desalination

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Section: Microiltration and Ultrailtration Membranesmentioning

confidence: 99%

On the Purification of Agro-Industrial Wastewater by Membrane Technologies: The Case of Olive Mill Effluents

Ochando-Pulido¹,

Martínez-Férez²

2017

Desalination

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“…However, despite the relevant COD reduction, the organic matter concentration in the final permeate stream was still too high. Akdemir and Ozer (2009) examined the suitability of pH adjustment (pH = 2) and cartridge filtration (20 μm) as pretreatments for pressuredriven crossflow UF of OMW from a three-phase mill, reaching COD removal efficiencies up to 63%. However, cartridge filtration is not a suitable operation for being transferred to an industrial scale and the whole treatment did not meet the discharge standard compliance pursued.…”

Section: Infl Uence Of the Different Pretreatments On The Threshold Umentioning

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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“…In this regard, membrane technology is compact and modular, presents high efficiency and moderate investment and maintenance expenses (Akdemir and Ozer A., 2009;Ochando-Pulido et al, 2013a. The biggest technical drawback for the implementation of membrane technologies in wastewater treatment plants is still membrane fouling (Stoller and.…”

Section: Introductionmentioning

confidence: 99%

Regarding the rejection performance of a polymeric reverse osmosis membrane for the final purification of two-phase olive mill effluents previously treated by an advanced oxidation process

Ochando-Pulido

Martínez-Férez

2017

Grasas y Aceites

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SUMMARY:In previous works on olive mill wastewater (OMW), secondary advanced oxidation treatment solved the problem related to the presence of phenolic compounds and considerable chemical oxygen demand. However, the effluent presented a significant salinity after this treatment. In this work, an adequate operation of a reverse osmosis (RO) membrane is addressed to ensure constant performance over a long period of time. In this paper, the effect of the operating parameters on the dynamic membrane rejection performance towards the target species was examined and discussed. Rejection efficiencies of all species were observed to follow a similar pattern, which consisted of slight initial improvement that further decreased over time. Rejection of both divalent ions remained constant at over 99% regardless of the operating conditions. Rejections were noticed to follow the order SO , as a rule. Divalent species were moderately more highly rejected than monovalent ones, in accordance with their higher charge and molecular size, and sulfate anions were consistently rejected by over 99%. Finally, the RO membrane exiting treated effluent was depleted of the high electro conductivity initially present (above 97% rejection), permitting its re-use as good quality irrigation water (below 1 mS/cm). KEYWORDS: Effluents reclamation; Olive mill wastewater; Rejection; Reverse osmosis; Wastewater purificationRESUMEN: Sobre la eficiencia del rechazo de una membrana polimérica de ósmosis inversa para la purificación del agua residual de almazara de dos fases, previamente tratada mediante un proceso avanzado de oxidación. En trabajos previos con agua residual de almazara, se solucionó el problema en relación a la presencia de compuestos fenólicos y la considerable concentración de material orgánico. Sin embargo, el efluente presentaba una salinidad significativa tras éste. Este trabajo tiene por objetivo estudiar la adecuada operación de una membrana de ósmosis inversa (OI) para asegurar rendimientos constantes por largos períodos de tiempo de operación. Se examina y discute el efecto de los parámetros de operación en el rendimiento dinámico del rechazo de especies diana. Se observó que la eficiencia de rechazo de todas las especies siguió un patrón similar, consistente en una mejora inicial que posteriormente minoró con el tiempo de operación. El rechazo de iones divalentes se mantuvo constante sobre 99% independientemente de las condiciones de operación. La selectividad del rechazo siguió el orden , en general. Las especies divalentes fueron moderadamente más rechazadas que las monovalentes, en concordancia con su mayor carga y tamaño molecular, y los iones sulfato fueron consistentemente rechazados al 99%. Finalmente, el efluente a la salida de la membrana de OI se encontraba exento de los altos valores de conductividad inicialmente presentes (rechazo superior al 97%), permitiendo su reutilización como agua de regadío de buena calidad (inferior a 1 mS/cm). PALABRAS-CLAVE:

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Investigation of two ultrafiltration membranes for treatment of olive oil mill wastewater

Cited by 94 publications

References 18 publications

On the Purification of Agro-Industrial Wastewater by Membrane Technologies: The Case of Olive Mill Effluents

On the Purification of Agro-Industrial Wastewater by Membrane Technologies: The Case of Olive Mill Effluents

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

Regarding the rejection performance of a polymeric reverse osmosis membrane for the final purification of two-phase olive mill effluents previously treated by an advanced oxidation process

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