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Research concerning polymerized titanium salts for preliminary treatment of municipal wastewater remains limited.We proposed the pre-coagulation of municipal wastewater with polymerized titanium based coagulants,followed by direct crossflow ultrafiltration for water reuse by avoiding biological treatment.Compared with polymerized aluminum chloride(PAC),polymerized ferric sulfate(PFS)and polymerized titanium sulfate(PTS),the polymerized titanium chloride(PTC)achieved higher coagulation efficiency,with chemical oxygen demand(COD)and total phosphorus(TP)removal reached 80.5%and 99.1%,respectively.