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《Chemistry》 2012-08
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Study on High Denitrification of Rotating Biological Contactor

Li Fang1,Kan Lianbao1,Cui Hongmei1,Lv Bingnan2,(1Department of Water Draining and Supply,School of Civil Engineering,Northeast Petroleum University,Daqing 163318; 2School of Municipal & Environmental Engineering,Harbin Institute of Technology,Harbin 150090)  
To adopt a 3-stage rotating biological contactor(RBC),the removal rate of total nitrogen(TN) is 30.94%,51.52%,58.67% respectively when the hydraulic retention time(HRT) is 5、8、12h.It is proved that the BRC has the function of simultaneous nitrification and denitrification.After increasing nitrification liquid circulation system,the removal rate of TN achieved to 74.57% at 15℃ and reflux ratio 200%.Changing rotation rate of RBC and water temperature,removal rate of TN achieved to 85.35% at water temperature 30℃ and rotation rate 10r/min.The results showed that the RBC exhibits a good prospect for removing of nitrogen in wastewater treatment.
【CateGory Index】: X703
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