不同运行工况条件下Orbal氧化沟工艺脱氮除磷效果研究  

Study on Nitrogen and Phosphorus Removal by Orbal Oxidation Ditch Process under Different Operating Conditions

作　　者：付朝臣 刘家宏[2] 栾清华[1] 窦鹏 周晋军 Fu Chaochen;Liu Jiahong;Luan Qinghua;Dou Peng;Zhou Jinjun(School of Water Conservancy and Hydroelectric Power,Hebei University of Engineering,Handan 056038,China;State Key Laboratory of Simulation and Regulation Water Cycle in River Basin,China Institute of Water Resources and Hydropower Research,Beijing 100038,China;Engineering and Technology Research Center for Water Resources and Hydroecology of the Ministry of Water Resources,Beijing 100048,China;College of Architecture and Civil Engineering,Beijing University of Technology,Beijing 100124,China)

机构地区：[1]河北工程大学水利水电学院,河北邯郸056038 [2]水利部水资源与水生态工程技术研究中心,北京100038 [3]北京市水科学技术研究院,北京100048 [4]北京工业大学建筑工程学院,北京100124

出　　处：《环境科学与管理》2021年第4期108-112,共5页Environmental Science and Management

基　　金：国家水体污染控制与治理科技重大专项(2017ZX07102-004)。

摘　　要：研究了不同运行工况条件下Orbal氧化沟工艺脱氮除磷效果。在水温25℃左右时系统脱氮效果较好,NH 3-N去除率在90%左右,TN去除率67.14%左右。增加污泥回流比可以提高系统脱氮效率,污泥回流比为100%和200%时,TN平均去除率分别为55%和65%。好氧区DO在2 mg/L时,TP平均去除率为88%,好氧区过量曝气时即DO>3.5 mg/L,TP去除率也由95%下降到26%。结论:提高曝气量虽能提高NH 3-N硝化效果,但并不能提高TN去除率;增加回流比可以提高脱氮效率,但需综合考虑能耗、运行费用等因素;维持好氧区DO浓度为2~3 mg/L,可以实现较好的除磷效果。This paper studies the nitrogen and phosphorus removal effects of orbal oxidation ditch process under different operating conditions.When water temperature is about 25℃,the denitrification effect of the system is the best with average removal rate of ammonia nitrogen more than 90%and the average removal rate of total nitrogen 67.14%.Increasing reflux ratio can improve denitrification efficiency,when the sludge reflux ratio of oxidation ditch are 100%and 200%.The average removal rate of total nitrogen is 55%and 65%respectively.When DO in aerobic area is maintained at 2 mg/L,the phosphorus removal rate is 88%.When Do exceed 3.5 mg/L in case of excessive aeration in aerobic area,the phosphorus removal rate decreased from 95%to 26%.Although increasing the aeration can make the nitrification of ammonia nitrogen complete,it can't improve the removal rate of total nitrogen.Increasing the reflux ratio can improve the denitrification efficiency.In the actual operation process,energy consumption,operation cost and other issues need to be considered comprehensively.In low load,aeration is adopted to control,reduce aeration and maintain DO concentration of 2~3 mg/L in aerobic area can achieve better phosphorus removal effect.

关 键 词：脱氮除磷 污泥回流 溶解氧 反硝化 

分 类 号：X703[环境科学与工程—环境工程]