Microfiltration trends

FIGURE 19.14 Application of microfiltration and ultrafiltration in milk protein standardization and fractionation. (Rosenberg, M., Trends Food Sci. Tech., 6, 12, 1995. With permission.)... 

Figure 33.13 shows the amplitude of reflection B in Figure 33.12 as a function of frequency for the three PVDF microfiltration membranes. One observes that the amplitude decreases (i.e., attenuation increases) as the nominal pore size increases. A similar trend was observed for the mixed cellulose-ester membranes. Ramaswamy et al. (2004) corroborated their UTDR measurements with SEM and porometry analyses that confirmed that there were substantive differences in the stmctuie of these membranes. They also developed a simple neural network model in which five characteristic frequencies in the UTDR waveform response were used to determine the mean pore size of a membrane. Hence, the... 

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