Static cleaning tests as the first step to optimize RO membranes cleaning procedure

García-Fayos, B.; Arnal, J.M.; Gimenez, A.; Álvarez-Blanco, Silvia; Sancho, M.

doi:10.1080/19443994.2014.957924

Cited by 9 publications

(9 citation statements)

References 31 publications

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“…As organic matter is hydrophobic, the hydrophobic tail of SDS can adhere to the foulants while the hydrophilic head tends to move toward water (Madaeni and Samieirad, 2010). Furthermore, it is reported that SDS could effectively remove colloidal fouling under proper cleaning conditions (Garcia-Fayos et al, 2015). For physical cleaning, rinsing with water is the most frequent method used in practice.…”

Section: Membrane Cleaningmentioning

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 Cleaningmentioning

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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“…Although some of the factors affecting cleaning efficiency (e.g., pH or temperature) were not directly investigated in this study, the adapted cleaning procedures developed (Table 3), as well as the standard cleaning procedures (Table 2), were already performed at optimized conditions (based on literature data such as [10,11,16]). The CIPs were performed tightly at the permitted limits of the membrane manufacturer in terms of cleaning solution type, concentration, temperature, pH, and velocity (Tables 2 and 3 and Supplementary Table S4).…”

Section: Discussionmentioning

confidence: 99%

“…CIP efficiencies strongly depend on chemical reactions between foulants and membrane surface, as well as the 2 Journal of Engineering reactions between foulants and chemicals, which include hydrolysis, peptization, saponification, solubilization, dispersion, and chelation [9][10][11]. There are several categories of cleaning agents such as alkaline solutions, acids, metal chelating agents, surfactants, enzymes, and oxidizing agents.…”

Section: Introductionmentioning

confidence: 99%

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Membrane Fouling and Chemical Cleaning in Three Full-Scale Reverse Osmosis Plants Producing Demineralized Water

Beyer

Laurinonyte²,

Zwijnenburg³

et al. 2017

Journal of Engineering

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Membrane fouling and cleaning were studied in three reverse osmosis (RO) plants. Feed water was secondary wastewater effluent, river water, and surface water. Membrane autopsies were used for fouling characterization. Fouling layer measurements included total organic carbon (TOC), adenosine triphosphate, polysaccharides, proteins, and heterotrophic plate counts. In all locations, membrane and spacer fouling was (bio)organic. Plant chemical cleaning efficiencies were evaluated from full-scale operational data and cleaning trials in a laboratory setup. Standard cleaning procedures were compared to two cleaning procedures specifically adapted to treat (bio)organic fouling using commercial blend cleaners (mixtures of active substances). The three RO plants were impacted by irreversible foulants causing permanently decreased performance in normalized pressure drop and water permeability even after thorough chemical cleaning. The standard plant and adapted cleaning procedures reduced the TOC by 45% on average, with a maximum of ∼80%. In general, around 20% higher biomass removal could be achieved with adapted procedure I compared to adapted procedure II. TOC measurements and SEM showed that none of cleaning procedures applied could remove foulants completely from the membrane elements. This study underlines the need for novel cleaning approaches targeting resistant foulants, as none of the procedures applied resulted in highly effective membrane regeneration.

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“…Physical method is also referred to as the hydraulic method. It employs the use of mechanical forces to displace and remove the fouling agents from the membrane surface [69]. These methods of cleaning are typically used in the cleaning in place (CIP) situations.…”

Section: Membrane Cleaningmentioning

confidence: 99%

Fouling and Cleaning in Osmotically Driven Membranes

Chollom¹,

Rathilal²

2018

Osmotically Driven Membrane Processes - Approach, Development and Current Status

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Fouling is a phenomenon that occurs in all membrane processes. It is a complex problem, which limits the full operation of this technology. Fouling in pressure-driven membranes (PDMs) has been studied extensively, and the occurrence is well understood in that methods of mitigation have been proposed; however, limitations still occur for their full implementation. The use of osmotically driven membranes (ODMs) for water treatment is an emerging technology, which has shown some advantages such as low hydraulic pressure operation, high solute rejection and high recovery over PDMs. However, like in PDMs, fouling still presents a challenge. This chapter is aimed at evaluating the impact of fouling on the ODM performance, exploring the factors and mechanisms governing the fouling behaviour, developing approaches for mitigating fouling, elucidating the effect of membrane fouling and providing mitigation strategies as well as the causes of fouling in ODMs.

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Static cleaning tests as the first step to optimize RO membranes cleaning procedure

Cited by 9 publications

References 31 publications

A review of reverse osmosis membrane fouling and control strategies

A review of reverse osmosis membrane fouling and control strategies

Membrane Fouling and Chemical Cleaning in Three Full-Scale Reverse Osmosis Plants Producing Demineralized Water

Fouling and Cleaning in Osmotically Driven Membranes

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