This study investigated the feasibility of enhanced MABR for the surface water treatment. Membrane module suitable for efficient aeration and microbial adhesion was designed. In Phase 1, only half of the membrane modules were aerated to facilitate the formation of stable biofilm with aerobic and anaerobic microbial community, achieving the simultaneous hydrolytic-acidification, aerobic oxidation, and nitrification-denitrification effects. In Phase 2, all the membrane modules were aerated and poly-hydroxyalkanoate(PHA) was utilized as carbon resource to promote the microbial growth. Nitrogen and phosphorus were bio-transformed concurrently.