4Cote P, Buisson H, Praderie M. Immersed membranes activated sludge process applied to the treatment of municipal wastewater[J]. Wat Sci Tech, 1998, 38 (4/5) : 437 - 442.
5Muller E B, Stouthamber A H, Verseveld H W, et al. Aerobic domestic wastewater treatment in a pilot plant with complete sludge retention by cross- flow filtration [J]. War Res, 1995,29(4) : 1179 - 1189.