Hollow fiber reverse osmosis

A hollow-fiber reverse-osmosis module consists of a shell which houses the hollow fibers (Fig. 11.3). The fibers are grouped together in a bundle with one end sealed and the other open to the atmosphere. The open ends of the fibers are potted into Ml epoxy sealing head plate after which the permeate is collected. The pressurized feed solution (denoted by the shell side fluid) flows radially from a central porous tubular distributor. As the feed solution flows around the outer side of the fibers toward the shell perimeter, the permeate solution penetrates through the fiber wall into the bore side by virtue of reverse osmosis. The permeate is collected at the open ends of the fibers. The reject solution is collected at the porous wall of the shell. 

Dandavati, M S., Doshi, M. R., and Gill, W. N. (1975). Hollow fiber reverse osmosis Experiments and analysis of radial flow systems. Chem. Eng. Sci., 30, 877-886. 

Gupta, S. K. (1987). Design and analysis of a radial-flow hollow-fiber reverse-osmosis system. Ind. Eng. Chem. Res. 26, 2319-2323,... 

Orofino, T. A. (1977). Technology of hollow fiber reverse osmosis systems. In Reverse Osmosis and Synthetic Membranes (S. Sourirajan, eds.), pp. 313-341 National Research Council, Ottawa, Canada. 

Soltanieh, M., and Gill, W. N. (1984). An experimental study of the complete mixing model for radial flow hollow fiber reverse osmosis systems. Desalination, 49, 57-88. 

Hollow-Fiber Reverse-Osmosis Composite Membranes Process and Properties... 

Fig 5. Hollow fiber reverse osmosis module used in desalination and other separation processes. Tmoho C o. Lnl.. Osaka, Japan)... 

In reverse osmosis, the commonly used modules are spiral-wound. Plate-and-frame and tubular modules are limited to a few applications in which membrane fouling is particularly severe, for example, in food applications or processing heavily contaminated industrial wastewater. The hollow fiber reverse osmosis modules used in the past have now been almost completely displaced by spiral-wound modules, which are inherently more fouling resistant, and require less feed pretreatment. 

Schiffer, D.K. Davis, R.B. Coplan, M.J. "Development of Composite Hollow Fiber Reverse Osmosis Membranes" NTIS Report No, 80-213044, 1979. 

Davis, R.B. Schiffer, D.K. and Kramer C.E. "Hollow Fiber Reverse Osmosis Composite Membranes Process and Properties", ACS Symposium Series 153, Synthetic Membranes, Vol 1 ACS, Washington D.C. 367, 1981. 

FIGURE 20.1-3 Sketch of a Purmasep hollow-fiber reverse osmosis module. Courtesy of E. I. Du Pont Co. 

Hollow Fiber Reverse Osmosis Systems", NTIS Report No. PB80-213044, loc. cit. (June 1979). 

Sekino, M., Precise analytical model of hollow fiber reverse osmosis modules, J. Membr. ScL, 85, 241-252, 1993. 

Sekino M (1995) Study of an analytical model for hollow fiber reverse osmosis module systems. Desalination 100(l) 85-97... 

Hollow-fiber reverse-osmosis modules (a) sheU-side feed and (b) bore-side feed. 

Dance, E. L., Davis, T. E., Mahon, H. I., McLain, E. A., Skiens, W. E., and Spano, J. O. (1971). Development of cellulose triacetate hollow fiber reverse osmosis modules for brackish water desalination. Report No. 763. U.S. Office of Sahne Water Res. Develop. Progr., New York. 

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