The influence of antiscalants on biofouling of RO membranes in seawater desalination

Sweity, Amer; Oren, Yoram; Ronen, Zeev; Herzberg, Moshe

doi:10.1016/j.watres.2013.03.042

Cited by 111 publications

(25 citation statements)

References 49 publications

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“…Sweity et al [61] found that polyacrylate-based anti-scalants promoted biofouling by altering the hydrophobicity and surface charge of RO membrane surfaces. Polyphosphonatebased anti-scalants also contributed to biofouling by providing a source of phosphorous in otherwise phosphorous-limited conditions typical in seawater desalination [61]. More recently, the effects of different anti-scalants during brackish water desalination were investigated using microscopy techniques.…”

Section: Biological Foulingmentioning

confidence: 99%

Critical aspects of RO desalination: A combination strategy

et al. 2017

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Due to a significant drop in the energy needed for RO desalination from 12 kWh/m 3 to ~2 kWh/m 3 over the past 20 years, which is close to 1 kWh/m 3 , the theoretical minimum for recovering salt-free water from seawater, the focus here is on the critical aspects that offer opportunities to further reduce costs. These include pre-and post-treatment; and analysis and optimization of the performance of RO systems, such as selectivity, capacity, and flux decline. Flux decline includes concentration polarization and fouling from inorganic, organic, biological constituents. We call these the "three legs' that undergird all membrane processes. The approach here is quantitative and includes detailed fluid mechanics and associated mass transfer of RO systems for optimizing performance.

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Section: Biological Foulingmentioning

confidence: 99%

Critical aspects of RO desalination: A combination strategy

et al. 2017

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“…shown that polyacrylate-and phosphate based anti-scalants can enhance biofouling by modifying the physico-chemical properties of the membranes [22,118] and acting as a source of nutrients.…”

Section: Ultrasoundmentioning

confidence: 99%

Reverse osmosis pretreatment technologies and future trends: A comprehensive review

2019

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Recent progress in reverse osmosis (RO) technology is not limited to RO membrane materials, module designs and RO process optimization. It involves prior feed treatment which directly impacts RO system performance. The ongoing challenges of membrane fouling in RO membranes can be addressed by increasing the operational efficiency through the use of correct pretreatment options which can mitigate organic and inorganic fouling by selectively rejecting contaminants prior to reaching the RO unit. Highly polluted water resources have put critical stress on the existing conventional pretreatment techniques, whereby membrane pretreatment has emerged as a promising alternative. This paper provides an overview of the development and current trends in conventional and nonconventional RO pretreatment techniques whereby the techniques are critically reviewed to 2 inform readers of potential improvements in such areas. This paper addresses the major drawbacks of conventional pretreatment methods which have necessitated the use of membrane pretreatment techniques. Special attention is given to microfiltration, ultrafiltration and nanofiltration methods and their development in terms of advanced membrane materials based on ceramics and self-cleaning membranes. Studies from laboratory scale standalone systems, pilot scale and large scale integrated systems for performance, cost and ecological analysis have been reviewed to familiarize readers with the many factors which need to be analyzed for selection of the appropriate pretreatment method(s). The critical review in this paper will help researchers focus more on the areas which have room for further development for cost-effective and advanced RO pretreatment techniques.

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“…Since reuse of CTBD requires electric conductivity (EC) values below 1000 lS/cm , the majority of these studies focused on desalination of CTBD by physicochemical water treatment technologies (Zhang et al, 2008;Altman et al, 2012;van Limpt & van der Wal, 2015;L€ owenberg et al, 2015). Various studies showed that physicochemical CTBD desalination is hampered by conditioning chemicals (CC) that are present in CTBD (Greenlee, Testa, Lawler, Freeman, & Moulin, 2010;L€ owenberg et al, 2015;Sweity, Oren, Ronen, & Herzberg, 2013). CC are used to prevent processes that disturb the cooling process efficiency, such as fouling, scaling, and corrosion.…”

Section: Introductionmentioning

confidence: 99%

A review on the removal of conditioning chemicals from cooling tower water in constructed wetlands

Wagner

Parsons

Rijnaarts

et al. 2018

Critical Reviews in Environmental Science and Technology

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Large volumes of freshwater are used globally for cooling towers. The reuse of discharged cooling tower water in cooling towers itself could mitigate freshwater scarcity problems. Prior to its reuse, the cooling tower blowdown has to be desalinated. However, physicochemical desalination techniques are hampered by conditioning chemicals (CC) that are added to the cooling tower water circuit to prevent corrosion, mineral scaling, and biofouling and can damage physicochemical desalination equipment. The potential of constructed wetlands (CWs) for the cost-effective removal of these CC prior to desalination is discussed in this review. The characteristics of CWs that determine their suitability for the removal of CC from cooling tower blowdown are elucidated, such as multiple removal pathways working simultaneously. In addition, specific challenges for the design of a constructed wetland for cooling tower blowdown treatment are reviewed, such as configuration options, the toxicity of CC, and the formation and removal of harmful byproducts.

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The influence of antiscalants on biofouling of RO membranes in seawater desalination

Cited by 111 publications

References 49 publications

Critical aspects of RO desalination: A combination strategy

Critical aspects of RO desalination: A combination strategy

Reverse osmosis pretreatment technologies and future trends: A comprehensive review

A review on the removal of conditioning chemicals from cooling tower water in constructed wetlands

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