An　integrated　process　of　powdered　activated　carbon　(PAC)　and　ultrafiltration　(UF)　was　used　to　treat　a　micro-polluted　water.　Effects　of　PAC　dosages　on　turbidity,　UV254　and　CODMn　removal,　as　well　as　membrane　fouling　were　investigated.　Effects　of　PAC　retention-time　on　organic　removal　was　conducted　simultaneously.　The　results　indicate　that　the　effluent　turbidity　is　under　0.1000　NTU,　which　could　not　be　influenced　by　PAC　dosage　and　the　turbidity　of　influent.　Organics　removal　is　enhanced　with　the　increase　of　PAC　dosage　at　10,　20　and　40　mg/L,　but　the　performance　of　unit　PAC　mass　is　reduced.　It　could　meet　the　demand　of　economics　and　effluent　quality　at　the　dosage　of　10　mg/L　PAC.　Organics　removal　is　decreased　with　the　increase　of　PAC　retention-time,　and　the　decline　is　weaker　at　a　higher　dosage.　Membrane　fouling　is　reduced　with　PAC-UF　process.　A　better　trans-membrane　pressure　(TMP)　recovery　is　received　for　sodium　hypochlorite　composite　with　acid　or　alkali　during　chemical　cleaning.