“…Hollow fiber membranes have been used previously in a number of gas transfer applications including: air stripping of VOCs from contaminated water (Castro and Zander, 1995;Semmens et al, 1989), recovery of cyanide from wastewater (Shen et al, 1997), bubble-free aeration of bioreactors Semmens, 1992, 1996;Coté et al, 1988Coté et al, , 1989, and biological treatment of VOCs in wastewaters (Aziz et al, 1996;Freitas dos Santos and Livingston, 1995a;Pavasant et al, 1996). Several authors have also investigated the use of HFMBs for treatment of gas phase VOCs (Ergas and McGrath, 1997;Hartmans et al, 1992;Parvatiyar et al, 1996a,b;Reij et al, 1995Reij et al, , 1997.…”