Implications of critical flux and cake enhanced osmotic pressure (CEOP) on colloidal fouling in reverse osmosis: Experimental observations

Chong, Tzyy Haur; Wong, Fook-Sin; Fane, Anthony G.

doi:10.1016/j.memsci.2008.01.030

Cited by 130 publications

(119 citation statements)

References 36 publications

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“…Cake enhanced concentration polarization (CECP) or cake enhanced osmotic 600 pressure (CEOP) is a condition where back diffusion of the retained particles from 601 the membrane surface which is fouled, to the bulk solution is slowed down and 602 hence cake layer is formed [129][130][131]. In this condition, the particles need to diffuse 603 longer through tortuous channels within the cake layer.…”

Section: Concentration Polarization 594mentioning

confidence: 99%

Membrane-Based Point-Of-Use Water Treatment (PoUWT) System in Emergency Situations

Shamsuddin

Das

Starov

2014

Separation & Purification Reviews

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Citation: SHAMSUDDIN, N., DAS, D.B. and STAROV, V., 2016. Membranebased point-of-use water treatment (PoUWT) system in emergency situations: a review. Separation and Purification Reviews, 45 (1), pp. 50-67. During emergency situations, effective and quick reactions are vital in order to supply 7 safe and unpolluted drinking water within approved guidelines Point-of-use water 8 treatment (PoUWT) system, for instance, portable membrane-based water treatment 9 devices, could help affected people to survive while waiting for aids to arrive. In the 10 context of portable membrane-based water purification devices, it is also found that 11 the most literature does not mention particle depositions and interactions, and 12 membrane fouling mechanisms that might occur in these devices.

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Section: Concentration Polarization 594mentioning

confidence: 99%

Membrane-Based Point-Of-Use Water Treatment (PoUWT) System in Emergency Situations

Shamsuddin

Das

Starov

2014

Separation & Purification Reviews

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“…A number of studies employ the critical flux, rather than steady-state flux, as a reference flux for the study of filtration parameters (such as crossflow velocity, slurry particle size, or eletrokinetic effects). Examples include Chellappah et al (2008), Chong et al (2008), Kim and Zydney (2006), and Huisman et al (1999b). As stated above, critical flux is related to conditions that lead to the incipient deposition of particles on the filter surface.…”

Section: 7mentioning

confidence: 99%

“…While the bulk of the work has involved micro-and ultra-filtration media, the critical flux has recently been demonstrated on reverse osmosis media (Chong et al 2008). Operation below or at critical filter flux avoids entirely the formation of a filter cake on the surface of the filter element, potentially eliminating the need for process cleaning strategies like backpulsing.…”

Section: 7mentioning

confidence: 99%

A Brief Review of Filtration Studies for Waste Treatment at the Hanford Site

Daniel¹,

Schonewill²,

Shimskey³

et al. 2010

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SummaryThis document completes the requirements of Milestone 1-2, PNNL Draft Literature Review, discussed in the scope of work outlined in the EM-31 Support Project task plan WP-2.3.6-2010-1. The focus of task WP-2.3.6 is to improve the U.S. Department of Energy's (DOE's) understanding of filtration operations for high-level waste (HLW) to enhance filtration and cleaning efficiencies, thereby increasing process throughput and reducing the sodium demand (through acid neutralization). Developing the processes for fulfilling the cleaning/backpulsing requirements will result in more efficient operations for both the Hanford Tank Waste Treatment and Immobilization Plant (WTP) and the Savannah River Site (SRS), thereby increasing throughput by limiting cleaning cycles.The purpose of this document is to summarize Pacific Northwest National Laboratory's (PNNL's) literature review of historical filtration testing at the laboratory and of testing found in peer-reviewed journals. Eventually, the contents of this document will be merged with a literature review by SRS to produce a summary report for DOE of the results of previous filtration testing at the laboratories and the types of testing that still need to be completed to address the questions about improved filtration performance at WTP and SRS. To this end, this report presents 1) a review of the current state of crossflow filtration knowledge available in the peer-reviewed literature, 2) a detailed review of PNNLrelated filtration studies specific to the Hanford site, and 3) an overview of current waste filtration models developed by PNNL and suggested avenues for future model development.This extensive review provides a starting point to help achieve the ultimate goal of the current project, which is to identify technologies such as modifications to the process (e.g., reconfiguration of the filter geometry or changes to operational techniques) or the use of physical property modifiers that increase the sustainability of the filter process. Overall, two avenues of future model development are recommended: 1) determination of long-term filtration dynamics of actual waste and waste simulant slurries and 2) evaluation of the impact of solution chemistry on the rate of filtration and filter fouling. A better understanding of these long-term fouling dynamics and solution chemistry effects will help in developing better predictive models and improved process optimization.v

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“…Chong and Fane (2009) proposed a model which accounts the accumulation of deposits by relating the fractional deposition constant and critical flux. Fractional deposition constant quantifies the amount of silica convected toward the membrane and finally deposited on the surface (Chong and Fane, 2009;Chong et al, 2008). All these models used Kozeny-Carman relation to represent the cake formation which is primarily valid for low porosity values (Bowen and Jenner, 1995a;Kim et al, 2006) and considers constant structure for the colloidal suspension.…”

Section: Introductionmentioning

confidence: 99%

Colloidal fouling of nanofiltration membranes: A novel transient electrokinetic model and experimental study

Mamun

Sadrzadeh

Chatterjee

et al. 2015

Chemical Engineering Science

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Implications of critical flux and cake enhanced osmotic pressure (CEOP) on colloidal fouling in reverse osmosis: Experimental observations

Cited by 130 publications

References 36 publications

Membrane-Based Point-Of-Use Water Treatment (PoUWT) System in Emergency Situations

Membrane-Based Point-Of-Use Water Treatment (PoUWT) System in Emergency Situations

A Brief Review of Filtration Studies for Waste Treatment at the Hanford Site

Colloidal fouling of nanofiltration membranes: A novel transient electrokinetic model and experimental study

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