A　flux　recovery　model　of　chemical　cleaning　of　microfiltration　membranes　in　membrane　bioreactor　(MBR)　was　proposed　based　on　Hom-Haas　model.　This　model　provides　intuitive　prediction　of　flux　recovery　as　a　function　of　cleaning　time　and　cleaning　solution　concentration　for　PAN　microfiltration　membrane　fouled　with　activated　sludge　from　membrane　bioreactor　(MBR).　The　quantitative　effects　of　different　chemical　cleaning　conditions　(temperature,　transmembrane　pressure　and　agitation　speed)　on　model　parameters　were　calculated　by　means　of　Multiple　Linear　Regression.　High　accuracy　of　the　proposed　model　is　approved　not　only　by　chemical　cleaning　agent　of　NaOCl,　but　also　by　other　cleaning　agents　such　as　NaOH　and　SDS.　(c)　2016　Taiwan　Institute　of　Chemical　Engineers.　Published　by　Elsevier　B.V.　All　rights　reserved.