Foulant characterization and distribution in spiral wound reverse osmosis membranes from different pressure vessels

Kim, Sung Jo; Oh, Byung Soo; Yu, Hye Weon; Kim, Lan Hee; Kim, Chang Min; Yang, Euntae; Shin, Myung Seop; Jang, Am; Hwang, Moon Hyun; Kim, In Soo

doi:10.1016/j.desal.2015.05.013

Cited by 46 publications

(19 citation statements)

References 37 publications

(53 reference statements)

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“…2D reveals a RO membrane surface fouled by a common colloidal foulant, silica (Ho et al, 2016). In practice membrane fouling is usually caused by a combination of different foulants and membrane autopsy methods are widely used to study the origin and extent of membrane fouling and distribution of foulants because it can provide precise information about foulants compositions and properties (Gorzalski and Coronell, 2014;Kim et al, 2015;Tang et al, 2014;Tran et al, 2007). However, fundamental understanding of formation mechanism of fouling layer could not be obtained through autopsy.…”

Section: Membrane Foulingmentioning

confidence: 99%

A review of reverse osmosis membrane fouling and control strategies

Jiang

Li²

2017

Science of The Total Environment

711

362

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Reverse osmosis (RO) membrane technology is one of the most important technologies for water treatment. However, membrane fouling is an inevitable issue. Membrane fouling leads to higher operating pressure, flux decline, frequent chemical cleaning and shorter membrane life. This paper reviews membrane fouling types and fouling control strategies, with a focus on the latest developments. The fundamentals of fouling are discussed in detail, including biofouling, organic fouling, inorganic fouling and colloidal fouling. Furthermore, fouling mitigation technologies are also discussed comprehensively. Pretreatment is widely used in practice to reduce the burden for the following RO operation while real time monitoring of RO has the advantage and potential of providing support for effective and efficient cleaning. Surface modification could slow down membrane fouling by changing surface properties such as surface smoothness and hydrophilicity, while novel membrane materials and synthesis processes build a promising future for the next generation of RO membranes with big advancements in fouling resistance. Especially in this review paper, statistical analysis is conducted where appropriate to reveal the research interests in RO fouling and control.Graphic Abstract

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Section: Membrane Foulingmentioning

confidence: 99%

A review of reverse osmosis membrane fouling and control strategies

Jiang

Li²

2017

Science of The Total Environment

711

362

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“…It was known that different types of foulants and scalants were characterized in each RO elements according to its specific position within a pressure vessel [45,46]. Each RO element was autopsied for the extraction of the flat sheet membrane samples and the foulants accumulated on the membrane surfaces.…”

Section: Membrane and Foulant Analysismentioning

confidence: 99%

Long-Term Stability of Low-Pressure Reverse Osmosis (RO) Membrane Operation—A Pilot Scale Study

Park

Kwon

2018

Water

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Reverse osmosis (RO) elements operating at a low pressure (LP) or a low energy (LE) are generally called "LPRO" or "LERO", and the nomenclature "LP" and "LE" are convertible due to the interrelated features of the pressure and the energy in the RO process. Not only can LPRO be operated at lower pressures, which enables energy saving, but also at the standard operating pressure with an enhanced permeate flux. In this study, the feasibility of the LPRO element was evaluated in the face of high fouling potential feed water. The commercially available standard RO and LPRO were chosen, and the membrane properties including the fouling susceptibility and the surface characteristics were thoroughly evaluated. The variations of various performance parameters were monitored during an 872 h operation in a pilot system, which was operated in a constant flux mode. Then, the used membranes were analyzed to further verify the fouling load localization and the fouling intensities. The average flux variation of the individual RO elements in a vessel and the economic feasibility of LPRO were also evaluated through a simulation study using an RO system design software. This study showed that the localization of fouling load within a pressure vessel of an LPRO system caused about 20% higher flux decline and almost 2-times higher salt passage than those of a standard RO membrane system. Furthermore, the simulation study predicted that average operating pressure difference ratio (%) between two RO membranes decreased from 24.4% to 17.8% and a substantial quantity of LPRO elements (83.3%) must be replaced to meet the designated water criteria only after 2 years' operation.

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“…Various analysis helps to explanation the morphology of a fouled membrane surface and the identification and the distribution of organic/inorganic and biological components onto the membrane surface. While the membrane autopsies provide accurate information about the origin and the extent of foulants and fouling mechanisms, the more efficient membrane operation could be achieved by considering the membrane autopsy results (Kim et al 2015).…”

Section: Introductionmentioning

confidence: 99%

“…The results indicated that inorganic fouling was mainly formed calcium carbonate and aluminosilicates and operation under appropriate conditions and correct pretreatment increased the membrane lifespan. In another study, Kim et al (2015) performed a membrane autopsy of three fouled spiral wound, reverse osmosis membrane from different pressures vessel to identify the origin and extent of membrane fouling. The results showed that fulvic acid components from feed water was the main contributor of fouling.…”

Section: Introductionmentioning

confidence: 99%

Understanding the operational problems and fouling characterization of RO membrane used for brackish water treatment via membrane autopsy

Balcik

2021

Water Science and Technology

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An autopsy of spiral wound RO membrane operated in brackish water treatment was conducted to understand the origin and extent of foulants and fouling mechanisms. Structural and chemical characterization was determined by visual inspection and instrumental analysis such as SEM-EDS and XRD. It was observed that the membrane surfaces were completely covered with a gray/brown pollutant layer in all membrane sheets. SEM images proved accumulation of mineral pollutants on membrane surface. Also, the high levels of Al and Si which was attributed to aluminum silicates originating from feed water were determined on membrane surfaces. Additionally, the XRD analysis results showed that the foulant sample collected from membrane surfaces include halloysite, SiO2 and LiCl components. Fujiwara result proved that no damage was occurred on the membrane surface due to oxidation. Consequently, a fouling control strategy for RO-based brackish water treatment plants was also recommended to increase the membrane life.

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Foulant characterization and distribution in spiral wound reverse osmosis membranes from different pressure vessels

Cited by 46 publications

References 37 publications

A review of reverse osmosis membrane fouling and control strategies

A review of reverse osmosis membrane fouling and control strategies

Long-Term Stability of Low-Pressure Reverse Osmosis (RO) Membrane Operation—A Pilot Scale Study

Understanding the operational problems and fouling characterization of RO membrane used for brackish water treatment via membrane autopsy

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