Organics, sulfates and ammonia removal from acrylic fiber manufacturing wastewater using a combined Fenton-UASB (2 phase)-SBR system

► A novel Fenton-UASB (2 phase)-SBR system was employed to treat the acrylic fiber manufacturing wastewater. ► Based on the special characteristics of the wastewater, the running parameters and mechanism of each unit were studied. ► The simultaneous removal of COD, sulfate and ammonium-N in the novel combined system was achieved.