Fouling of reverse osmosis membranes by hydrophilic organic matter: implications for water reuse

Lee, Sangyoup; Ang, Wui Seng; Elimelech, Menachem

doi:10.1016/j.desal.2005.04.090

Cited by 253 publications

(112 citation statements)

References 18 publications

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“…This is in good agreement with ion-exchange selectivity data published by Mukherjee et al (2003) and other membrane-field researchers (Jae-Wook Lee et al, 2006;Feini et al, 2008). Theoretically, a ion exchange selectivity for a specific ion represents a smaller hydrated ionic radius, which in turn leads to a greater inter-diffusion coefficient or so-called salt permeability coefficient.…”

Section: Speciessupporting

confidence: 79%

“…As a consequence, concentration polarization and the formation of a fouling layer are minimized, and an increase in the cross flow has a marked beneficial effect on fouling reduction. An inverse behavior has been reported for wastewater with significant conductivity but very low organics by Jae-Wook Lee et al (2006). Moreover, it should not be disregarded that some ionic speciessuch as calcium ions -tend to promote intra-and inter-molecular bridge formation and aggregation of organic matter Peng et al, 2003).…”

Section: Speciesmentioning

confidence: 99%

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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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Section: Speciessupporting

confidence: 79%

Section: Speciesmentioning

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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“…The fouling behavior of the mixtures was quite similar to that of polysaccharides alone. Research efforts on organic fouling have also been made on RO membranes [18,19], which discovered that there was an inverse correlation between the size of the foulants aggregates and the intermolecular adhesion force. Foulant aggregate size generally decreases with the increase in intermolecular adhesion force.…”

Section: Introductionmentioning

confidence: 99%

Identification of key factors affecting the organic fouling on low-pressure ultrafiltration membranes

Xiao

Zhang

et al. 2013

Journal of Membrane Science

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“…Pre-treatment can be done in RO application to control membrane fouling and scaling by removing impurities from the feed water [3,9,10]. Unfortunately, pre-treatment is not capable to perfectly remove all impurities from feed water and even causes fouling of the membrane [9,11]. Chemical membrane cleaning is an alternative way to control fouling on the membrane [12].…”

Section: Introductionmentioning

confidence: 99%

Case Study of a Small Scale Reverse Osmosis System for Treatment of Mixed Brackish Water and STP Effluent

Widiasa

Jayanti

2017

J. Eng. Technol. Sci.

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Abstract.A case study on utilizing reverse osmosis (RO) technology to fulfill fresh water needs at a mall and a hotel has been done on Bali Island, Indonesia. A mix of brackish water and sewage treatment plant (STP) effluent was used as feed water in the RO system. The system used 36 membrane elements (CSM RE 8040 BLN) arranged into two stages: 8 pressure vessels (PVs) in the first stage and 4 PVs in the second stage, each loaded with 3 membranes. The objectives of this research were to assess the cleaning effectivity in the plant, to evaluate the cleaning of 1 membrane element using a CIP system, and to assess the use of the membrane for filtration in the pre-treatment system. SEM and FTIR analysis indicated that the foulants on the membrane surface were dominated by organic foulants and inorganic deposits. To clean the discarded membrane the proposed method used NaOH solution (pH 12 and pH 13) and citric acid (pH 2 and pH 3). All membranes displayed a dramatic decline in rejection of about 80%. Based on the rejection tests of SO 4 2-, Cl -, turbidity reduction approached 100%. It can be concluded that an RO membrane that has undergone selectivity decline can be re-used as a filtration membrane in the pre-treatment system.

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Fouling of reverse osmosis membranes by hydrophilic organic matter: implications for water reuse

Cited by 253 publications

References 18 publications

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

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

Identification of key factors affecting the organic fouling on low-pressure ultrafiltration membranes

Case Study of a Small Scale Reverse Osmosis System for Treatment of Mixed Brackish Water and STP Effluent

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