How　to　determine　characteristic　parameters　in　Tiller＇s　power-law　expressions　is　crucial　to　analyze　cake　properties　in　microfiltration　using　conventional　cake　filtration　theory.　In　this　study,　these　characteristic　parameters　of　activated　sludge　from　MBRs　were　determined　by　fitting　experimental　data　to　our　proposed　equation,　and　then　cake　properties　were　analyzed　from　two　aspects　of　time　and　location.　In　addition,　the　relative　cake　resistance　(R-x/R-c),　and　the　resistance　and　location　of　the　skin　layer　under　different　operating　conditions　were　quantitatively　analyzed　by　our　developed　equations.　Results　indicated　that　variations　of　cake　properties　with　time　were　inconspicuous,　while　cake　properties　varied　sharply　over　location　until　the　relative　thickness　(x/L)　reached　0.2.　The　cake　consisted　of　a　skin　layer　(at　the　location　of　x/L　＜　0.2)　below　a　loose　layer,　which　was　opposite　to　the　structure　of　asymmetric　membrane.　More　than　70%　of　cake　resistance　concentrated　in　the　skin　layer　whose　thickness　was　only　20%　of　cake　thickness.　Predictions　of　permeate　flux　determined　by　obtained　cake　properties　showed　good　agreement　with　experimental　data.　(C)　2016　Elsevier　B.V.　All　rights　reserved.