In this work, the treatment of raisins processing wastewater using micellar-enhanced ultrafiltration (MEUF) with two cationic surfactants, hexadecyl pyridinium chloride and Cetyl trimethyl ammonium bromide, has been investigated. The effect of process parameters, such as transmembrane pressure (TMP), temperature, and surfactant concentration, on permeate flux and rejection of the wastewater pollutants have been studied. COD, turbidity, TDS, and electrical conductivity were selected as the indicators of wastewater pollution. The obtained results show that rising TMP or temperature led to rejection decrease and flux increase. However, rejection of pollutants increased and flux decreased with increasing surfactant concentration. Applying surfactants enhanced the rejection of the pollutants, thereby a considerable amount of wastewater pollution was omitted and the turbidity of the wastewater was decreased to a high extent through this process. As a result, the MEUF process can be applied as an efficient method for the treatment of raisins factories’ wastewater.

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