Component membrane resistances (i.e., Rf, Rc and Rt) were calculated by Eq. (1) of the resistance-in-series model to examine the effect of mixing intensity on aggregates, and the resulting cake property on membrane permeability. The resistances over 4 filtration cycles are summarized in Table 1. Cake resistance (Rc) is generally the primary resistance in membrane filtration. Most membrane resistance is the result of cake resistance, Rc: the properties of a cake layer thus play a critical role in cake permeability. Other work has suggested that during filtration, cakes containing high cake compressibility lead to low cake porosity and high specific cake resistance [22], which reduces the cake permeability. Aggregates with a high fractal dimension (df) can resist the collapse of cakes, which lowers cake compressibility [21] and [23]. A previous study of ours found that cake compressibility was mainly governed by the structure of aggregates formed prior to membrane filtration [9]. Other studies have suggested that the cake layer formed from aggregates with high df has low specific cake resistance [7] and [8], which results in increased permeate flux. Fig. 6 shows the variation of specific cake resistance with filtration time at low and high mixing intensities during chlorination. At low mixing intensity, the cake layer of both oxides exhibited much higher specific cake resistance, along with smaller df, which accelerates the decline of the relative flux, as seen in Fig. 5. The results show that flux can be improved by enhanced-mixing oxidation as a result of the formation of a permeable cake layer with low cake compressibility in the membrane filtration.