Evaluation of novel hollow fibre membranes for NOM removal by advanced membrane autopsy

Keucken, Alexander; Wang, Yuan; Tng, Ken; Leslie, Greg; Persson, Kenneth M; Köhler, Stephan Jürgen; Spanjer, Tom

doi:10.2166/ws.2015.170

Cited by 12 publications

(8 citation statements)

References 19 publications

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“…This is especially an issue for spiral-wound modules, which are prone to (bio)fouling and have limited cleaning possibilities [12]. HF NF membranes have been named as a promising alternative [20,43], since they offer the advantage to combine the beneficial cleaning conditions of HF UF membranes with the separation efficiency of spiral-wound modules.…”

Section: Natural Organic Matter Removalmentioning

confidence: 99%

“…Biopolymers and humic substances were almost completely removed. An autopsy of the membrane was performed after 12 months of operation, which demonstrated no significant changes compared to the virgin membrane [20]. In a follow-up pilot study, the same membrane type was evaluated for drinking water production on the same lake water without the prior coagulation [45].…”

Section: Natural Organic Matter Removalmentioning

confidence: 99%

“…Nevertheless, biofouling is a potential threat for these membranes and therefore several of the commercially available HF NF membranes have been developed based on selective layers that are chemically stable. This, for instance, allows the use of oxidizing chemical solutions [18,20]. This combination of chemical stability and HF geometry has been a big accelerator for the development of these new membranes, as they enable simple and direct water treatment processes based on NF-like selectivities.…”

Section: Introductionmentioning

confidence: 99%

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Advances and Applications of Hollow Fiber Nanofiltration Membranes: A Review

Sewerin¹,

Elshof²,

Matencio

et al. 2021

Membranes

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Hollow fiber nanofiltration (NF) membranes have gained increased attention in recent years, partly driven by the availability of alternatives to polyamide-based dense separation layers. Moreover, the global market for NF has been growing steadily in recent years and is expected to grow even faster. Compared to the traditional spiral-wound configuration, the hollow fiber geometry provides advantages such as low fouling tendencies and effective hydraulic cleaning possibilities. The alternatives to polyamide layers are typically chemically more stable and thus allow operation and cleaning at more extreme conditions. Therefore, these new NF membranes are of interest for use in a variety of applications. In this review, we provide an overview of the applications and emerging opportunities for these membranes. Next to municipal wastewater and drinking water processes, we have put special focus on industrial applications where hollow fiber NF membranes are employed under more strenuous conditions or used to recover specific resources or solutes.

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Section: Natural Organic Matter Removalmentioning

confidence: 99%

Section: Natural Organic Matter Removalmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Advances and Applications of Hollow Fiber Nanofiltration Membranes: A Review

Sewerin¹,

Elshof²,

Matencio

et al. 2021

Membranes

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“…Membranes treated with a high dose of hypochlorite age the most intensively. Keucken et al (Keucken et al, 2016) found no changes in the performance of the ultrafiltration polyethersulfone membrane (PES) for a period of 1 year during wastewater treatment. They also concluded that it was too short a period of time for a complete evaluation.…”

Section: Membrane Permeability and Fouling Behavior In Ultrafiltrationmentioning

confidence: 99%

Application of the Ultrafiltration and Photooxidation Process for the Treatment of Rainwater

Marszałek

Dudziak

2021

Water Air Soil Pollut

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As water resources become increasingly scarce, the concept of water reuse is gaining importance. Recently, attention has been paid to the use of rainwater as an alternative water resource. Part of this study, laboratory-scale experiments were conducted to evaluate the effectiveness and efficiency of the ultrafiltration process. The aim of the research was to assess the influence of pollutants from various roof coverings on the ultrafiltration process and the occurrence of membrane fouling. Additionally, the rainwater disinfection process was performed using UV radiation. Analysis of rainwater collected from various roofing materials, evaluating rainwater treatment by ultrafiltration in a cross-flow system, determination of the effectiveness and efficiency of the UF membrane, and additional disinfection of rainwater using UV radiation were carried out. Rainwater was collected from various roofing materials, such as steel roof tiles (RW1), bituminous shingles (RW2), and tar paper roofing (RW3). The treatment efficiency of ultrafiltration was evaluated by monitoring typical quality parameters: color, turbidity, COD, TOC, absorbance of UV254, ammonium, conductivity, and pH. Coliform bacteria, Escherichia coli and Enterococci, were monitored as total number of microorganisms at 22 ± 2 °C after 72 h. As expected, a significant reduction in individual parameters was recorded. COD of rainwater decreased in RW1 by 59%, in RW2 by 69%, and in RW3 by 74%. The ultrafiltration process ensured the complete retention of the coliform bacteria and E. coli. Complete elimination of microorganisms was demonstrated when the ultrafiltration process and UV radiation disinfection were combined.

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“…However, there are findings from another study with the same flux and crossflow as in this work, but with lower organic loading and less frequent chemically enhanced forward flushes. After a year, the membrane was examined through an autopsy, and no changes to the membrane surface could be detected between the sampled fibers and the samples taken from virgin fibers [36].…”

Section: Economic Summarymentioning

confidence: 99%

Feasibility Study of Advanced NOM-Reduction by Hollow Fiber Ultrafiltration and Nanofiltration at a Swedish Surface Water Treatment Plant

Lidén

Persson

2016

Water

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Abstract:Membrane technology, i.e., ultrafiltration and nanofiltration, is growing in popularity, as it is a space efficient alternative for surface water treatment. Two types of hollow fiber membranes were tested in a fully equipped and automated pilot at a Swedish water treatment plant. Raw water was treated by a nanofilter and by coagulation before an ultrafilter. Operation parameters recorded during these trials have been the basis for cost estimations and assessments of environmental impact, comparing the two membrane modules to the existing conventional treatment. The membranes required lower chemical consumption, but led to increased costs from membrane modules and a higher energy demand. Compared to the existing treatment (0.33 €/m 3 ), the operational costs were estimated to increase 6% for ultrafiltration and 30% for nanofiltration. Considering the low emissions from Nordic energy production, the membrane processes would lower the environmental impact, including factors such as climate and ecosystem health. Greenhouse gas emissions would decrease from 161 g CO 2 -eq/m 3 of the existing process, to 127 g CO 2 -eq/m 3 or 83 g CO 2 -eq/m 3 for ultrafiltration and nanofiltration, respectively. Lower chemical consumption and less pollution from the sludge leaving the water treatment plant lead to lower impacts on the environment.

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Evaluation of novel hollow fibre membranes for NOM removal by advanced membrane autopsy

Cited by 12 publications

References 19 publications

Advances and Applications of Hollow Fiber Nanofiltration Membranes: A Review

Advances and Applications of Hollow Fiber Nanofiltration Membranes: A Review

Application of the Ultrafiltration and Photooxidation Process for the Treatment of Rainwater

Feasibility Study of Advanced NOM-Reduction by Hollow Fiber Ultrafiltration and Nanofiltration at a Swedish Surface Water Treatment Plant

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