Study of mass transfer characteristics for a hollow fiber reverse osmosis module

Kumano, Atsuo; Sekino, Masaaki; Matsui, Yoichi; Fujiwara, Nobuya; Matsuyama, Hideto

doi:10.1016/j.memsci.2008.07.011

Cited by 25 publications

(15 citation statements)

References 7 publications

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“…Fig. 6 [108] shows the structure of a hollow fiber module. As pressurized feed water enters the module through the core tube, water molecules permeate radially into the fibers and exit through the open fiber ends in the epoxy tube sheet while the concentrate leaves the module at the same end as the feed inlet.…”

Section: Hollow Fiber Modulesmentioning

confidence: 99%

Reverse osmosis desalination: A state-of-the-art review

et al. 2019

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Water scarcity is a grand challenge that has always stimulated research interests in finding effective means for pure water production. In this context, reverse osmosis (RO) is considered the leading and the most optimized membrane-based desalination process that is currently dominating the desalination market. In this review, various aspects of RO desalination are reviewed. Theories and models related to concentration polarization and membrane transport, as well as merits and drawbacks of these models in predicting polarization effects, are discussed. An updated review of studies related to membrane modules (plate and frame, tubular, spiral wound, and hollow fiber) and membrane characterization are provided. The review also discusses membrane cleaning and different pre-treatment technologies in place for RO desalination, such as feed-water pre-treatment and biocides. RO pre-treatment technologies, which include conventional (e.g., coagulationflocculation, media filtration, disinfection, scale inhibition) and non-conventional (e.g., MF, UF, and NF) are reviewed and their relative attributes are compared. As per the available literature, UF, MF and coagulation-flocculation are considered the most widely used pre-treatment technologies. In addition, this review discusses membrane fouling, which represents a serious challenge in RO processes due to its significant contribution to energy requirements and process economy (e.g., flux decline, permeate quality, membrane lifespan, increased feed pressure, increased pre-treatment and membrane maintenance cost). Different membrane fouling types, such as colloidal, organic, inorganic, and biological fouling, are addressed in this review. Principles of RO process design and the embedded economic and energy considerations are discussed. In general, cost of water desalination has dropped to values that made it a viable option, comparable even to conventional water treatment methods. Finally, an overview of hybrid RO desalination processes and the current challenges faced by RO desalination processes are presented and discussed.

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Section: Hollow Fiber Modulesmentioning

confidence: 99%

Reverse osmosis desalination: A state-of-the-art review

et al. 2019

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“…According to the model under consideration, the solvent flux can be expressed in a form [1,2,[28][29][30]:…”

Section: Pore Flow-based Modelsmentioning

confidence: 99%

Modern trends in the mathematical simulation of pressure-driven membrane processes

Huliienko

Korniienko

Gatilov³

2020

JES

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The presented article is an attempt to evaluate the progress in the development of the mathematical simulation of the pressure-driven membrane processes. It was considered more than 170 articles devoted to the simulation of reverse osmosis, nanofiltration, ultrafiltration, and microfiltration and the others published between 2000 and 2010 years. Besides the conventional approaches, which include the irreversible thermodynamics, diffusion and pore flow (and models which consider the membrane surface charge for nanofiltration process), the application of the methods the computational fluid dynamics, artificial neural networks, optimization, and economic analysis have been considered. The main trends in this field have been pointed out, and the areas of using approaches under consideration have been determined. The technological problems which have been solved using the mentioned approaches have also been considered. Although the question of the concentration polarization has not been considered separately, it was defined that, in many cases, the sufficiently accurate model cannot be designed without considering this phenomenon. The findings allow evaluating more thoroughly the development of the simulation of pressure-driven membrane processes. Moreover, the review allows choosing the strategy of the simulation of the considered processes. Keywords: membrane, simulation, model, reverse osmosis nanofiltration, ultrafiltration, microfiltration.

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“…The surface roughness of the skin layer can be observed using scanning electron microscopic (SEM), as seen in the image of the ESPA2 RO membrane (Hydranautics) ( than TFC RO membranes, which requires RO systems using CTA membranes to be operated at a lower permeate flux than systems using TFC membranes. Despite this, systems with CTA RO membranes still have a smaller footprint than systems with TFC RO membranes, because the thin hollow fibres allows a higher membrane packing density in CTA modules [40].…”

Section: Polyamidementioning

confidence: 99%