Long-term flux decay

Figure 3.59 Long term flux decay and restoration by cleaning.

Figure 3.60 Effect of cross-flow velocity on long term flux decay.

Figure 3.63 Effect of "charged" membrane on long term flux decay with cathodic paint.

UF can remove metal values from metal plating wastes provided the metals are first precipitated to form a colloidal suspension. The process is described in Chapter 2 in the section on cross-flow applications. Even though MF membranes provide a higher flux, they are more prone to flux decay than UF due to internal pore fouling. The long term UF flux may be higher than that from MF. 

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