体积比对分段进水改良A^2/O工艺脱氮除磷性能的影响  

Effect of Volume Ratio on N and P Removal in Step-feed Inflow Modified A^2/O Process System

作　　者：王振国[1] 何争光[1] 彭赵旭[1] 焦耀亮 

机构地区：[1]郑州大学水利与环境学院,河南郑州450001

出　　处：《河南科技大学学报（自然科学版）》2015年第5期100-104,10,共5页Journal of Henan University of Science And Technology:Natural Science

基　　金：国家水体污染控制与治理科技重大专项基金项目(2012ZX07204-001-02-01)

摘　　要：为了探究体积比对脱氮除磷性能的影响,采用分段进水改良厌氧-缺氧-好氧(A2/O)工艺处理高氨氮低碳氮比的生活污水。在污泥回流比为70%,水力停留时间(HRT)为10 h条件下,考察了体积比(V预缺氧∶V厌氧∶V缺氧∶V好氧)对系统去除有机物、硝化效果、反硝化效果、总氮(TN)和总磷(TP)的影响。试验结果表明:不同体积比对系统有机物的去除和硝化效率影响不显著,出水化学需氧量(COD)和氨氮浓度分别在50 mg/L、5 mg/L以下;系统TN和TP去除受体积比影响较大,体积比为18∶18∶36∶72时,缺氧体积所占比例较大,反硝化细菌获得充足反应时间,反硝化效果最好,TN去除率平均达83.24%;体积比为12∶24∶24∶84时,厌氧体积的增加,为聚磷菌厌氧释磷提供有利条件,TP去除效果最佳,平均去除率达93.63%。The sewage of high ammonia nitrogen and low carbon nitrogen ratio was treated by the step-feed modified anaerobic-anoxic-oxic( A2/ O) process system in order to explore the influence of volume ratio( Vpre-anoxic∶ Vanaerobic∶ Vanoxic∶ Voxic) on nitrogen and phosphorus removal. Under the conditions of sludge reflux ratio 70% and hydraulic retention time( HRT) 10 h,the influence of volume ratio on organic matter,nitrification,denitrification,total nitrogen and total phosphorus was analyzed. The results indicate that different volume ratio has little effect on chemical oxygen demand( COD) and NH4+- N removal with the effluent of COD and NH4+- N less than 50 mg / L and 5 mg / L respectively. The removal efficiency of total nitrogen and total phosphorus is significantly affected by volume ratio. The anoxic volume is increased and more time is provided for denitrification. When the volume ratio is 18∶ 18∶ 36∶ 72,the denitrification efficiency is better with the average removal efficiency of total nitrogen being 83. 24%. Under the volume ratio 12 ∶ 24 ∶ 24 ∶ 84,the anaerobic volume is increased and a good condition is created for phosphorus released. The average removal efficiency of total nitrogen and total phosphorus reaches 93. 63%.

关 键 词：体积比 改良A2/O 高氨氮污水 分段进水 

分 类 号：X52[环境科学与工程—环境工程]