Three different conditions for relaxation and five for backwashing
as well as the continuous mode (Table 2) were applied to the
MBR, each for 24 h. The productivity was identical and equivalent
to an average flux of 20 L/(m2 h). The deviation of netwater productivity
for each run was less than 1%. A new membrane module was
used for each condition. Before use, the intrinsic resistance of the
membrane (Rm)was determined by cleanwater tests. The deviation
of each module Rm was less than 10%.