Types hollow fiber contained liquid

Liquid Membranes Se eral types of liquid membranes exist molten salt, emulsion, irnmobilized/siipported, and hollow-fiber-contained liquid membranes, Arald and Tsiikiibe (Liquid Membranes Chemical Ajijilieafions, (JR(J Press, 1990) and Sec, IX and (Jhap, 42 in Ho and Sirlcar (eds,) (op, cit, pp, 724, 764-808) contain detailed information and extensi -e bibliographies. 

Ultrafiltration (UF) refers to the removal of high molecular weight colloids (10,000 MW) up to particles less than 0.05 pm in diameter [10]. Like MF, UF places a mechanical barrier into the flow stream to separate the solid and liquid phases. The most common UF is a cross-flow hollow fiber type whereby a UF module contains hundreds of hollow microfibers. Whether or not the medium to be filtered flows inside or outside, the microfibers depends on the characteristics of the waste stream. UF is different from MF not only because UF can filter very small particles and some colloids, but also because of the cross-flow dynamics inside the UF module that keeps the surface of the hollow libers clean. Because of the cross flow, UF modules require a reject stream as well as a permeate stream. In other words, 100% of the liquid that enters the UF module does not exit as permeate. Figure 19.1 shows the differences between the UF and microlilters with respect to flow path. 

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