This　study　focused　on　the　effects　of　three　different　filtration-backwash　modes　on　membrane　fouling　control　for　various　sludge　suspensions　treatment.　A　relatively　slow　flux　decline　profile　showed　that　more　frequent　and　shorter　backwashing　mode　(Mode　1)　had　a　less　fouling　tendency.　Moreover,　this　mode　possessed　higher　capacity　to　remove　the　reversible　fouling　with　higher　hydraulic　cleaning　efficiency　(HCE)　and　lower　hydraulically　irreversible　fouling　index　(HIFI).　Typically,　when　fed　with　higher　carbon-to-nitrogen　ratio　suspension　(SBR6),　the　HCE　value　of　Mode　1　was　over　twice　as　high　as　that　of　Mode　3　(less　frequent　and　longer　backwashing).