The　effectiveness　of　enhancing　treatment　of　water　with　low　turbidity　through　combined　effects　of　permanganate　oxidation,　PAM　aiding　coagulation　and　sludge　recycling　was　investigated　through　continuous　bench　scale　studies.　In　comparing　with　ferric　chloride　coagulation,　only　recycling　sedimentation　sludge　was　ineffective　in　enhancing　treatment　of　water　with　low　turbidity.　PAM　with　recycled　sludge　showed　positive　effects,　and　the　additional　permanganate　dosing　exhibited　the　best　potential　of　favoring　coagulation,　which　leaded　to　much　lower　effluent　turbidity　and　CODMn.　Additionally,　it　was　observed　that　the　optimal　permanganate　dosage　was　0.4　mg/L　and　the　higher　permanganate　dosage　exhibited　inhibiting　effects　for　pollutants　removal.　SEM　analysis　indicated　that　the　flocs　were　loosely　formed　and　the　particle　diameter　was　critically　low　for　ferric　chloride　coagulation　process.　Comparatively,　the　addition　of　PAM　and　permanganate　with　recycled　sludge　facilitated　the　aggregation　of　tinny　particles　onto　compact　PAM　polymer　chains,　therefore　contributing　to　the　formation　of　compact　flocs　with　high　particle　diameter.　The　combined　employment　of　recycled　sludge,　PAM　and　permanganate　showed　the　best　potential　of　favoring　coagulation,　mainly　through　synergistic　effects　between　seeding,　polymer　bridging　and　increasing　effective　collision　in　mechanism.　Additionally,　the　variation　of　Fe　and　Mn　concentration　after　recycling　and　sedimentating　units　was　studied　for　the　processes,　and　the　main　species　was　also　investigated　for　elements　Fe　and　Mn.　Sludge　recycling　and　permanganate　addition　did　not　increase　Fe　and　Mn　concentration　in　the　sedimented　water.