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《Chemical Industry and Engineering Progress》 2012-07
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COD and nitrogen removal with rotating biological contactor

LI Fang1,2,CUI Hongmei1,2,L? Bingnan3(1Department of Water Draining and Supply,School of Civil Engineering,Northeast Petroleum University,Daqing 163318,Heilongjiang,China;2Heilongjiang Key Laboratory of Disaster Prevention,Mitigation and Protection Engineering,Daqing 163318,Heilongjiang,China;3School of Municipal & Environmental Engineering,Harbin Institute of Technology,Harbin 150090,Heilongjiang,China)  
A 3-stage rotating biological contactor was used to study simultaneous removal of COD and nitrogen.When temperature was 15 ℃ and influent COD concentration was about 400mg/L,removal rate of COD was about 85%.Through controlling proper alkalinity nitrification rate of ammonia was about 75% and removal rate of TN was about 50%.After addition of a nitrification liquid circulation system,removal rate of TN,at reflux ratio of 200% increased to 73.87 %.Experimental results showed good effect of rotating biological contactor on removing COD and nitrogen.
【CateGory Index】: X703
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