By a News Reporter-Staff News Editor at Journal of Technology -- A new study on Desalination is now available. According to news originating from Vancouver, Canada, by VerticalNews correspondents, research stated, "The effect of surface shear stress on membrane fouling during submerged hollow fiber ultrafiltration of three different surface waters ( two lakes, one river) was investigated. Surface shear stresses that mimicked those induced when applying continuous and intermittent coarse bubble air sparging, large pulse bubble air sparging, as well as no air sparging were considered."
Our news journalists obtained a quote from the research from the University of British Columbia, "The results suggest that fouling was mainly due to the accumulation of the biopolymer fraction of the natural organic matter present in the raw water. Inducing shear stresses onto the membrane surface significantly decreased the rate of membrane fouling (relative to no shear stress applied) in all waters tested. Of the shear stress conditions studied, that which mimicked large pulse bubble sparging had the greatest effect, reducing fouling by up to 80% when compared to conditions with no sparging applied. Conditions that mimicked intermittent and continuous coarse bubble fouling reduced the rate of fouling by up to 77 and 49%, respectively. These results suggest that the shear stresses induced by sparging can promote back transport of soluble organic material from the membrane surface."
According to the news editors, the research concluded: "A semi-empirical relationship was developed to estimate the effect of raw water characteristics and applied sparging conditions on membrane fouling."
For more information on this research see: Surface shear stress and membrane fouling when considering natural water matrices. Desalination, 2013;330():22-27. Desalination can be contacted at: Elsevier Science Bv, PO Box 211, 1000 Ae Amsterdam, Netherlands. (Elsevier - www.elsevier.com; Desalination - www.elsevier.com/wps/product/cws_home/502683)
The news correspondents report that additional information may be obtained from H.E. Wray, University of British Columbia, Dept. of Civil Engn, Vancouver, BC V6T 1Z4, Canada. Additional authors for this research include R.C. Andrews and P.R. Berube.
Keywords for this news article include: Canada, Vancouver, Desalination, British Columbia, North and Central America
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