3Bouhabila E H, Aim R Ben and Buisson. Fouling characterisation in membrane bioreactors [J]. Sep PurifTechnol., 2001.22-23,123-132.
4Sato T and Ishii Y. Effects of activated sludge properties on water flux of ultrafiltration membrane used for human excrement treatment[J]. Water Sci Technol., 1991, 23, 1601-1608.