Author/Authors :
Tobiason، j.e نويسنده College of Engineering, Department of Civil and Environmental Engineering, University of Massachusetts Amherst, 21 Marston Hall, 130 Natural Resources Road, Amherst, Massachusetts 01003- USA , , Nabi Bidhendi، Gh. R. نويسنده , , Torabian، A نويسنده Department of civil- environmental engineering, Graduate Faculty of Environment, University of Tehran, P.O.Box 14155-6136, Tehran, Iran , , Ghadimkhani، A.A نويسنده Department of civil- environmental engineering, Graduate Faculty of Environment, University of Tehran, P.O.Box 14155-6136, Tehran, Iran , , Etemadi، H نويسنده Department of civil- environmental engineering, Graduate Faculty of Environment, University of Tehran, P.O.Box 14155-6136, Tehran, Iran ,
Abstract :
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 prechlorinationCoagulation. In addition pretreatment increases Nanofiltration efficiency.
