Evaluating impact of fouling on reverse osmosis membranes performance

Peña, Nuria; Gallego, Silvia; Vigo, F.; Chesters, Stephen P.

doi:10.1080/19443994.2012.699509

Cited by 66 publications

(53 citation statements)

References 12 publications

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“…Aluminum and silicon were detected by EDS in all of the membrane samples with an average concentration of 1-5 at% (Supplementary data S6) and local maxima up to 17 at%, showing the presence of aluminosilicates (e.g. clay), a commonly found colloidal foulant in NF and RO membrane elements [29]. The deposition and precipitation of aluminosilicates leads to an NPD increase, K w decrease, gradually affects all membrane elements and it is one of the limiting factors of high-recovery reverse osmosis operations [29,30].…”

Section: Inorganic Precipitation and Scalingmentioning

confidence: 99%

Long-term performance and fouling analysis of full-scale direct nanofiltration (NF) installations treating anoxic groundwater

Beyer

Rietman²,

Zwijnenburg³

et al. 2014

Journal of Membrane Science

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Section: Inorganic Precipitation and Scalingmentioning

confidence: 99%

Long-term performance and fouling analysis of full-scale direct nanofiltration (NF) installations treating anoxic groundwater

Beyer

Rietman²,

Zwijnenburg³

et al. 2014

Journal of Membrane Science

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“…Oxidative damage by single or repetitive harsh CIPs will lead to decreased salt rejection of the membranes. Oxidative damage was diagnosed in ∼15% (severe damage) to ∼50% (slight damage) of all membranes analyzed in a big study of 500 autopsied membrane elements [3]. All three plants produce demineralized water and therefore membrane integrity as indicated by stable and high salt rejection is a key performance parameter.…”

Section: Full-scale Operation: Effect Of Cip On Membrane Integrity (Smentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

“…Biofouling, the most common form of membrane fouling, is the type of fouling that is the hardest to control [1][2][3]. An increase of the normalized feed channel pressure drop (NPD) over the feed spacer channel, a decrease in the normalized specific water permeability ( ), and/or changes in salt retention are common operational key performance indicators that show fouling development in full-scale applications [3][4][5]. Rapid biofouling typically manifests in the lead modules of the first stage, causing a strong increase in NPD and moderate decrease in [3][4][5], while slow biofouling may manifest throughout the whole installation [5].…”

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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“…Importantly, the performance and productivity of membrane filtration systems are reduced by fouling, which increases membrane resistance and reduces flux due to the formation of unwanted deposits on the membrane surface and/or in the membrane pores [97,98]. Extensive fouling may be caused, among others, by proteins, polysaccharides and polydisperse technical lignin, all of which are present during the enzymatic degradation of lignocellulosic biomass [92,97]. Accordingly, the filtration performance of membranes used in delignification reactions must be robustly tested, including their fouling and separation characteristics.…”

Section: Applications Of Enzymatic Lignin Degradationmentioning

confidence: 99%

Lignin Degradation Processes and the Purification of Valuable Products

Schoenherr¹,

Ebrahimi²,

Czermak³

2018

Lignin - Trends and Applications

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Lignin is a heterogeneous, phenolic and polydisperse biopolymer which resists degradation due to its aromatic and highly branched structure. Lignin is the most abundant renewable source of aromatic molecules on earth. The valorization of lignin could therefore provide a sustainable alternative to petroleum refineries for the production of valuable aromatic compounds. Even so, paper mills and lignocellulose feedstock biorefineries treat lignin largely as a waste product. In paper mills, 98% of technical lignin is incinerated for internal energy recovery while only 2% is used commercially (e.g. for the production of aromatics such as vanillin). The reasons for the underutilization of lignin include its recalcitrance to degradation and the challenge of separating mixtures of numerous degradation products. The successful valorization of lignin in the future thus depends on a broad understanding of biological and technical degradation processes, and the implementation of efficient product purification strategies. This article describes enzymatic, photocatalytic and thermochemical lignin degradation processes and considers purification methods for valuable lignin-derived degradation products. We focus on the potential of membrane-based separation technology, including data from our own recent research.

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Evaluating impact of fouling on reverse osmosis membranes performance

Cited by 66 publications

References 12 publications

Long-term performance and fouling analysis of full-scale direct nanofiltration (NF) installations treating anoxic groundwater

Long-term performance and fouling analysis of full-scale direct nanofiltration (NF) installations treating anoxic groundwater

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

Lignin Degradation Processes and the Purification of Valuable Products

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