Effect of Ultrasound on Membrane Filtration and Cleaning Operations

Ng, Kok-Kwang; Wu, Congyi; Yang, Hsiu-Lan; Panchangam, Sri Chandana; Lin, Yu-Hsuan; Hong, Pui-Kwan Andy; Wu, Chung‐Hsin; Lin, Cheng‐Fang

doi:10.1080/01496395.2012.682289

Cited by 13 publications

(4 citation statements)

References 31 publications

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“…The application of ultrasound in conventional membrane filtration has been investigated and various studies report process enhancement. Research has often been carried out during membrane cleaning process [7][8][9][10][11] but online ultrasonication has also been applied in both cross-flow [8,10,[12][13][14][15] and dead-end filtration [16]. In most of these studies, the ultrasound devices are ultrasonic water baths, in which the loss of acoustic power is reported to be very high, about 90% [17].…”

Section: Introductionmentioning

confidence: 99%

Effects of ultrasound on colloidal organization at nanometer length scale during cross-flow ultrafiltration probed by in-situ SAXS

Yao

Hengl

Baup

et al. 2014

Journal of Membrane Science

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Section: Introductionmentioning

confidence: 99%

Effects of ultrasound on colloidal organization at nanometer length scale during cross-flow ultrafiltration probed by in-situ SAXS

Yao

Hengl

Baup

et al. 2014

Journal of Membrane Science

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“…In addition, the membrane micrographs ( Figure 8) revealed a larger biofilm coverage area for the untreated cells compared to the ultrasonically treated ones. Kwang Ng et al [102] reported an experimental increment of 15%-20% permeate flux when they used ultrasound of 20kHz on a 10 kDa pore size membrane with trans-membrane pressure (TMP) of 100 kPa.…”

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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“…Recently, many researchers have used ultrasound to clean fouled membranes or even control membrane fouling [7][8][9][10][11]. During ultrasonic cleaning, microjets are formed above the surface of the membrane, with an average velocity of 100-200 m s -1 [12].…”

Section: Introductionmentioning

confidence: 99%

High‐Pressure Jet Cleaning of Polymeric Microfiltration Membranes

2020

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The cleaning effect of a high‐pressure jet of water on a polymeric microfiltration membrane was investigated at different pressures, durations, and angles. The angle of 70° at a pressure of 130 bar and a cleaning duration of 10 s were found to be promising parameters. Throughput measurements show that this cleaning method can restore about 80 % of the initial throughput of the membrane. Analyses by capillary flow porometer and UV‐vis spectrophotometer imply that an impact on the membrane was detectable after 1800 cleaning cycles at a pressure of 130 bar. Therefore, high‐pressure jet cleaning is a promising method for mechanical cleaning of track‐etched microfiltration membranes.

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Effect of Ultrasound on Membrane Filtration and Cleaning Operations

Cited by 13 publications

References 31 publications

Effects of ultrasound on colloidal organization at nanometer length scale during cross-flow ultrafiltration probed by in-situ SAXS

Effects of ultrasound on colloidal organization at nanometer length scale during cross-flow ultrafiltration probed by in-situ SAXS

Reverse osmosis pretreatment technologies and future trends: A comprehensive review

High‐Pressure Jet Cleaning of Polymeric Microfiltration Membranes

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