Similar removal efficiencies were obtained with the UF membranes of polyethersulfone: PW and PT by Benítez et al.(2009) in purification of cork processing wastewater, reported Robs for tannins above 70%. In addition, these values are also comparable with those reported by other authors that used different NF spiral membrane modules (thin film composite,TFC S2540 and NF 45-2540), and reported Robs for tannins above 90%, although they reported lower permeate flux since they used exhausted tanning liquors (Molinari et al., 2004). To the best of our knowledge there are no previous studies related to the removal of vegetable tannins of tannery industry byusing UF polymeric membranes, therefore this study sets a precedent because the results obtained are very promisingregarding permeate flux and rejection observed. Feed and permeate streams for GR60PP membrane in the experiment with synthetic wastewater at 5 bar after 4 h are shown in Fig. 8.