Preozonation and Prechlorination Effects on TOC Removal by Nanofiltration in Water Treatment

	Preozonation and Prechlorination Effects on TOC Removal by Nanofiltration in Water Treatment
International Journal of Environmental Research
مقاله 8، دوره 2، شماره 3، مهر 2008، صفحه 269-274 اصل مقاله (58.88 K)
شناسه دیجیتال (DOI): 10.22059/ijer.2010.203
چکیده
In this study, NF membrane was used for surface water treatment. The rejection of organic material, measured as Total organic carbon (TOC), by Nanofiltration was examined. The effects of application of pre-ozonation and pre-chlorination on TOC removal are discussed and their performances are compared with the performances of Nanofiltraion system without pretreatment process. In NF, natural organic rejection is high and no pre-treatment are required. Coagulation targets large hydrophobic organics which foul NF membranes by precipitation and gel layer formation. The results showed that TOC removal in Preozonation-coagulation was higher than prechlorination-Coagulation. In addition pretreatment increases Nanofiltration efficiency.
کلیدواژه‌ها
Water treatment؛ Nanofiltration؛ Preozonation؛ Prechlorination؛ Total Organic Carbon removal

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