前置反硝化BAF工艺处理景观水体  

Treatment of Landscape Water by Pre-denitrification Biological Aerated Filter

作　　者：伊学农[1] 高玉琼[1] 李晨光[1] 谭学军[2] 

机构地区：[1]上海理工大学环境与建筑学院,上海200093 [2]上海市政工程设计研究总院,上海200092

出　　处：《中国给水排水》2010年第5期69-72,共4页China Water & Wastewater

基　　金：国家科技支撑计划项目(2007BAK27B05-4)

摘　　要：为了提高曝气生物滤池（BAF）对景观水体的脱氮效果，开发了前置反硝化BAF工艺，考察了其对景观水体的处理效果及影响因素，并与传统BAF工艺作比较。结果表明，前置反硝化BAF工艺对TN和浊度的去除效果明显优于传统BAF工艺，前者对TN和浊度的平均去除率分别为45％和88％，而后者的分别为30％和47％；两种工艺对COD和氨氮的去除效果相近，但前置反硝化BAF工艺的出水水质更稳定；对于前置反硝化BAF工艺，当水力负荷为1．42～4．95m／h时，对COD、氨氮和TN的去除率均随水力负荷的增加而降低；在水力负荷为2．12m／h的条件下，回流比对COD和氨氮的去除效果影响不大，但对TN的去除率随回流比的增加呈先升高后降低的趋势，最佳回流比为1．5：1；另外，对TN的去除率随进水C／N值的增加而升高，当C／N〉6时，系统的脱氮效果较好。In order to improve the removal efficiency of nitrogen from landscape water by biological aerated filter （BAF）, the pre-denitrification BAF process was developed. The treatment efficiency of landscape water and the influence factors were investigated, and the pre-denitrification BAF was com- pared with traditional BAF. The results indicate that the removal efficiencies of TN and turbidity by the pre-denitrification BAF are better than those by traditional BAF. The removal rates of TN and turbidity by the pre-denitrification BAF and traditional BAF are 45%, 88% and 30%, 47% respectively. The removal efficiencies of COD and ammonia nitrogen by two kinds of processes are similar, but the effluent quality of the pre-denitrification BAF is more stable. For the pre-denitrification BAF, when the hydraulic load is 1.42 to 4.95 m/h, the removal rates of COD, ammonia nitrogen and TN decrease with the hydraulic load increasing. When the hydraulic load is 2.12 m/h, the return ratio has little effect on the removal of COD and ammonia nitrogen, but the removal rate of TN increases first and then decreases with the return ratio increasing, and the optimal return ratio is 1.5 ： 1. In addition, the removal rate of TN increases with increasing of the influent C/N ratio. When the C/N ratio exceeds 6, the nitrogen removal ef- ficiency of the system is better.

关 键 词：曝气生物滤池 景观水体 前置反硝化 脱氮 

分 类 号：TU991.2[建筑科学—市政工程]