Analysis of foulant layer in all elements of an RO train

Schneider, René Peter; Ferreira, Lucas Moreira; Binder, P.; Ramos, J. R.

doi:10.1016/j.memsci.2005.03.044

Cited by 82 publications

(25 citation statements)

References 27 publications

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“…Basically, the compositions of salt deposits on RO membranes are determined by inorganic compositions in feed water, chemicals added during pretreatment, as well as the chemical properties of the sparingly soluble inorganic salts (Schneider et al, 2005). analyzed the components of inorganic foulants on RO membranes through membrane autopsy and by means of SEM.…”

Section: Inorganic Scalingmentioning

confidence: 99%

A review of reverse osmosis membrane fouling and control strategies

Jiang

Li²

2017

Science of The Total Environment

750

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: Inorganic Scalingmentioning

confidence: 99%

A review of reverse osmosis membrane fouling and control strategies

Jiang

Li²

2017

Science of The Total Environment

750

362

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“…The biofilm matrix is highly hydrated when exposed to bulk liquid, with water accounting for over 98% of the biofilm matrix mass (Cooksey 1992). The biofilm matrix is known to be hygroscopic (Fletcher 1992;Schneider et al 2005), and therefore water sorption will occur when the hygroscopic biofilm surfaces are dried and then re-exposed to water based liquids. For a hygroscopic substance the decreased y adv observed is consistent with hygroscopic surfaces being known to be spontaneously invaded when wetted (Bico et al 2001).…”

Section: Impact Of Biofilm Growth Depositsmentioning

confidence: 99%

Impact of wastewater fouling on contact angle

Thomas

Muirhead

2009

Biofouling

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Capillary dependent systems are highly influenced by surface fouling and may degrade as material surface properties change. In anticipation of a spacecraft microgravity fluids management system exposed to highly variable wetting conditions, the impact of urine wastewater fouling on capillary contact angle was examined. The results indicate that, in general, surface fouling can decrease the contact angle when crystalline structures or biofilms form. Small crystalline growth on the order of 10 mm can lower advancing contact angles y adv by approximately 308, while biofilm growth can lower it by approximately 158. Vacuum drying of fouled surfaces increased y adv by about 88, and defects greater in height than 5% of the capillary length increased y adv by approximately 308. These trends may indicate that promotion of wastewater fouling may improve the performance of capillary dependent fluids management systems. These results may also influence terrestrial technologies, including medical catheters and sustainable wastewater treatment systems exposed to wastewater fouling.

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“…Fouling of the RO membrane can occur because of a variety of contaminants present in the feed water, including inorganic compounds, colloidal or particulate matter, dissolved organics, chemical reactants, microorganisms and microbial products [18][19][20]. It is difficult to predict the origin and extent of the fouling because of the simultaneous occurrence of these fouling mechanisms [21].…”

Section: Introductionmentioning

confidence: 99%