2.6.2. Concentration of the micro#ltratedflsh
meal efluent by NF
The nanofiltration experiment for the concentration
of the microfiltrated fish meal effluent run
at its natural pH, ambient temperature, and the
optimal operating pressure and crossflow velocity
determined in the previous section, i.e. 4 bar, and
4 m/s, respectively. The plant operated in open
loop mode since it is very hard to regulate the
concentrate flow rate and collect meaningful concentrate
samples in closed loop mode.