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۱Effect of Corroded and non Corroded Pipe Materials on Biofilm Formation in Water Distribution Systems
اطلاعات انتشار: World Applied Sciences Journal، سي و چهارم،شماره۲، ۲۰۱۶، سال
تعداد صفحات: ۹
The effect of pipe materials on biofilm formation in drinking water distribution system was studied using simulated drinking water distribution system. Biofilm was grown on different pipe materials under laminar flow rate (Reynolds number: 2000). The parameters analyzed were the numbers of cultivable bacteria using chromogenic media. The impact of different pipe materials were assessed after the biofilms reached steady–state. The total numbers of Salmonella Typhimuruim biofim was mostly higher than Listeria monocytogenes biofim cells. The steady–state of L. monocytogenes and S. Typhimuruim biofilm gorwon on PVC, PP and PE pipe materials was achieved in 70 days. While, steady–state biofilm formed in R material was at 60 days of L. monocytogenes and 80 d ays of S. Typhimuruim. In addition to, steady–state biofilm formed in I pipe material was achieved in 60 days of L. monocytogenes with total numbers of biofilm cells 108 CFU\cm2) and 70 days of S. Typhimuruim with total numbers of biofilm cells (109 CFU\cm2). In case of biofilm formed in Cu, L. monocytogenes and S. Typhimuruim biofilm have no steady–state. These results concluded that, the plasticbased materials are the most appropriate to be used for carrying the drinking water. While, the iron pipes are not recommended for carrying water in DWDS.
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