2013
DOI: 10.4314/wsa.v39i1.2
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Infrasonic backpulsed membrane cleaning of micro- and ultrafiltration membranes fouled with alumina and yeast

Abstract: Membrane fouling is universally considered to be one of the most critical problems in the wider application of membrane filtration. In this research microfiltration and ultrafiltration membranes were fouled during a cross-flow filtration process, using yeast and alumina suspensions in a flat cell. Infrasonic backpulsing directly into the permeate space was then used to clean the membrane, using both permeate water and soap solutions. Ultrasonic time domain reflectometry (UTDR) was used to detect and measure th… Show more

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Cited by 2 publications
(2 citation statements)
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“…Echo A is associated with the top plate or feed interface, and echo B is associated with the initial feed solution or membrane interface. If the fouling layer is dense and thick enough to produce a reflected ultrasonic signal, a new echo signal will appear as a consequence of the new feed/fouling interface . Δ S can be determined with the following equation: ΔS= 0.5cΔt where c is the ultrasonic velocity in the medium through which the wave travels and Δ t is the change in the arrival time of the fouling peak.…”
Section: Analytical Techniques For Studying Foulingmentioning
confidence: 99%
“…Echo A is associated with the top plate or feed interface, and echo B is associated with the initial feed solution or membrane interface. If the fouling layer is dense and thick enough to produce a reflected ultrasonic signal, a new echo signal will appear as a consequence of the new feed/fouling interface . Δ S can be determined with the following equation: ΔS= 0.5cΔt where c is the ultrasonic velocity in the medium through which the wave travels and Δ t is the change in the arrival time of the fouling peak.…”
Section: Analytical Techniques For Studying Foulingmentioning
confidence: 99%
“…One of the major drawbacks is susceptibility to biofilm formation, especially in the case of liquid retention in the system. The techniques like cross-flow or back pulse are sometimes insufficient when it comes to maintaining optimum process performance [6]. Combining them with surface the modification and functionalization of a membrane providing reduction in microbial concentration is considered to be potentially the most reasonable approach.…”
Section: Introductionmentioning
confidence: 99%