Removal of Organics in Micpolluted Water Sources by Bio-rehabilitation Process

The removal effect of organic pollutants on the bio-rehabilitation of the polluted water sources by the bio-contact oxidation process with the elastic packing and micro-pore aeration has been studied under the condition of COD_(Mn)6~11 mg/L,color 30~40 pei for raw water in the polluted river.The research results show the biofilm process can reach a removal efficiency of 22%~36% for COD_(Mn) of water sources with ordinary temperature 24~28℃,COD_(Mn) 6~11 mg/L in the water sources and a removal efficiency of 10%~23% for COD_(Mn) of water sources with low temperature 10~16℃,COD_(Mn) 6~10 mg/L,color 32~35 pei in the water sources under the conditions of the running parameters HRT 1.2 h,gas and water ratio(0.5∶1) and DO 8~10 mg/L for the biofilm process.