Résumé
For a given SMBR system, membrane fouling is linked to the more or less reversible accumulation of macromolecules and solids on the membrane surface and the irreversible sorption of soluble molecules inside the pores. If reversible accumulation can be minimized by filtering in subcritical conditions, adsorption can also be minimized by reducing the content of soluble organic matter (EPS, SMP) in mixed liquor. This paper shows (i) how the choice of operating parameters related to biological criteria (SRT and OL) can influence biological kinetic intensity and by-product (SMP) production by using a modified ASM3 model and (ii) how suspension characteristics and membrane aeration intensity can influence membrane fouling control according to the Hollow Fibre system configuration and to the different scale of observed fouling.