... performance on precipitating heavy metal and sulphide, decolouring, deodorizing, removing oil, disinfecting, dephosphorizing and to reducing COD&BOD. ... (PAC), Poly Ferric Sulfate(PFS) and other flocculating agent. High performance on flocculating aspect, sinking speed is ... higher than PAC series flocculating agent(such as Aluminum Sulphate, Poly Aluminum Chloride ), and ...