By a News Reporter-Staff News Editor at Journal of Technology -- Investigators publish new report on Membrane Science. According to news reporting originating from London, United Kingdom, by VerticalNews correspondents, research stated, "Pre-coagulation by alum before ultrafiltration without (CUF) and with (CAUF) powdered activated carbon (PAC) addition was investigated to explore the influence of PAC on membrane fouling. It was found that the continuous addition of a low dosage of PAC reduced membrane fouling for operational run periods
Our news editors obtained a quote from the research from the University of London Imperial College, "The presence of PAC increased the removal of dissolved organic matter (DOM), particularly proteinaceous substances, and some fractions of humic-type substances. For a longer operation time (>20 days) an increase in mainly reversible fouling was evident and was attributed to microorganism growth in the cake layer, as indicated by the enhanced concentrations of extracellular polymeric substances, such as polysaccharides and proteins. A process of crystallization of the coagulant floc in the cake layer with increasing operation time was believed to cause desorption of DOM from primary coagulation particles and a decrease in their size, and consequently a higher density of cake layer."
According to the news editors, the research concluded: "PAC absorption of desorbed DOM within the cake layer, and residual DOM after coagulation, reduced DOM reaching the membrane surface and the extent of subsequent internal membrane fouling."
For more information on this research see: Investigation of pre-coagulation and powder activate carbon adsorption on ultrafiltration membrane fouling. Journal of Membrane Science, 2014;459():157-168. Journal of Membrane Science can be contacted at: Elsevier Science Bv, PO Box 211, 1000 Ae Amsterdam, Netherlands. (Elsevier - www.elsevier.com; Journal of Membrane Science - www.elsevier.com/wps/product/cws_home/502692)
The news editors report that additional information may be obtained by contacting W.Z. Yu, University of London Imperial College, Dept. of Civil & Environm Engn, London SW7 2AZ, United Kingdom. Additional authors for this research include L. Xu, J.H. Qu and N. Graham.
Keywords for this news article include: London, Europe, United Kingdom, Membrane Science
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