El Abbassi, AbdelilahKhayet Souhaimi, MohamedHafidi, Abdellatif2023-06-202023-06-202011-10-010043-135410.1016/j.watres.2011.05.044https://hdl.handle.net/20.500.14352/44261© 2011 Elsevier Ltd. The authors gratefully acknowledge the financial support from International Foundation of Science (Stockholm, Sweden) Grant No: W/4749-1.Olive mill wastewater (OMW) is an important environmental pollution problem, especially in the Mediterranean, which is the main olive oil production region worldwide. Environmental impact of OMW is related to its high organic load and particularly to the phytotoxic and antibacterial action of its phenolic content. In fact, polyphenols are known as powerful antioxidants with interesting nutritional and pharmaceutical properties. In the present work, the efficiency of OMIV Micellar Enhanced Ultrafiltration (MEUF) treatment for removal and concentration of polyphenols was investigated, using an anionic surfactant (Sodium Dodecyl Sulfate salt, SDS) and a hydrophobic poly(vinyldene fluoride) (PVDF) membrane. The effects of the process experimental conditions on the permeate flux were investigated, and the secondary membrane resistance created by SDS molecules was evaluated. The initial fluxes of OMW processing by MEUF using SDS were 25.7 and 44.5 l/m(2) h under transmembrane pressures of 3.5 and 4.5 bar, respectively. The rejection rate of polyphenols without using any surfactant ranged from 5 to 28%, whereas, it reached 74% when SDS was used under optimum pH (pH 2). The MEUF provides a slightly colored permeate (about 88% less dark), which requires clearly less chemical oxygen demand (COD) for its oxidation (4.33% of the initial COD). These results showed that MEUF process can efficiently be applied to the treatment of OMW and for the concentration and recovery of polyphenols.engjournal articlehttp://dx.doi.org/10.1016/j.watres.2011.05.044http://www.sciencedirect.com/restricted access536Phenolic-compoundsFouling reductionOilMembraneWastewatersHydroxytyrosolDetoxificationQuantitiesOxidationMixturesTermodinámica2213 Termodinámica