Figure 5

Results of MD filtration tests at high recovery with synthetic feed water mixtures. The feed waters in the different graphs were as follows: (a) synthetic water, (b) synthetic water without SDS, (c) synthetic water after Fenton oxidation, (d) synthetic water without SDS after Fenton oxidation. Blue open squares represent the experimental water flux (left Y-axis), while orange solid circles and squares refer to the permeate conductivity and feed TOC concentration, respectively (Y-right axis; note the double measure unit). The model for water flux is depicted by a blue dash line. The composition of synthetic waters is summarized in Table 2. All the tests were conducted at a feed temperature of 50 °C and a distillate temperature of 25 °C, using PTFE membranes.