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Comparative Study of Conventional and Combined Process (Immobilized Microorganisms Pretreatment - Ultrafiltration) for Surface Water Treatment

Abstract. The research investigated the performance of two different surface water treatment methods: conventional and combined process (immobilized microorganisms pretreatment - ultrafiltration).The two sytems were carried out in a water supply plant in Guangzhou city, south China. In order to remove ammonia nitrogen (NH4+-N) efficiently, fluidized biofilm process with entrapped microorganisms pellets was applied to the combined process. NH4+-N concentration in the produced water was less than 0.5mg/l at the overall combined process. CODMn, UV254 and turbidity removals of 34.2%, 32.7% and 99.8% were also achieved in combined process and better than the traditional process. The results showed that the combined process was highly competitive in comparison to conventional treatment for surface water.