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Nanofiltration (NF) of waste water originated from nanofiltration drinking   water plant stationed in town of Kikinda (Northern Serbia) was investigated.   Experiments on removal characteristics of nanofiltration membranes when   exposed to influent rich in arsenic and natural organic matter under   different flux and transmembrane pressure (TMP) conditions were conducted in   order to obtain drinking water from waste water and reduce total amount of   waste water. Applied NF membranes showed remarkable removal characteristic.   Also, obtained result for concentrate yield, an indicator of reduced   concentrate amount, of 8.89% under optimum flux value presents considerable   amount of reclamated drinking water. Calculated empirical and theoretical   concentration factors quotients were indicated to probable accumulation of   some inlet water components at NF membrane surface. Based on the obtained   results that nanofiltration membranes remove natural organic matter, arsenic,   ammonia and sodium with high efficiencies of 98%, 96%, 80% and 93%   respectively, conceptual design of drinking water plant for City of Kikinda   was defined and presented

Groundwater nanofiltration process efficiency improvement with additional concentrate membrane treatment