生物滤池处理微污染原水中氨氮及“氮亏损”影响因素分析  

Impacting Factors of NH_4^+-N Removal and Nitrogen Loss for Micro-polluted Raw Water in Biofilter

作　　者：刘冰[1,2] 古励[2] 李清飞[1] 翟慧敏[1] 余国忠[1] 

机构地区：[1]信阳师范学院城市与环境科学学院,河南信阳464000 [2]重庆大学城市建设与环境工程学院,重庆400044

出　　处：《河南科学》2014年第2期263-269,共7页Henan Science

基　　金：国家自然科学基金项目(51208448);河南省教育厅科学技术研究重点项目(14A610004);信阳师范学院博士科研启动基金项目(91231);省部共建黄河中下游数字地理技术教育部重点实验室开放基金项目(GTYR2011006);信阳师范学院青年骨干教师资助计划项目(120511);重庆大学三峡库区生态环境教育部重点实验室基金项目

摘　　要：为探讨饮用水生物滤池对NH4+-N去除和"氮亏损"现象的影响因素,测定生物滤池进出水中NH4+-N,NO2--N,NO3--N等指标.结果表明,陶粒生物滤池对NH4+-N的去除率从14.97%到60.99%,活性炭生物滤池对NH4+-N的去除率从16.59%到83.02%;陶粒和活性炭滤池对NH4+-N的去除率都随着流速的增加而降低;陶粒滤池内NH4+-N的去除率随着气水比和C∶N的增加而先增加后下降;NH4+-N的去除率在活性炭滤池内随C∶N的增加而降低,气∶水的增加而增加;气∶水对两种生物滤池中NH4+-N去除的影响最大.陶粒生物滤池氮亏损的量从0.10 mg/L到0.70 mg/L,活性炭生物滤池氮亏损量从0.11 mg/L到1.01 mg/L;氮亏损量随着流速增加而降低,随着气水比增加而增加,随着C∶N的增加而先下降后增加;气水比对陶粒和活性炭生物滤池的氮亏损量影响最大.In order to explore the impacting factors of NH4＋-N removal and“nitrogen loss” in drinking biofilter, water quality parameters,such as NH4＋-N,NO2--N,NO3--N,and dissolved oxygen etc,were determined in inflow and outflow of biofilter. Removal of NH4＋-N was increased from 14.97% to 60.99% in ceramic biofilter,and that in activated carbon biofilter was increased from 16.59% to 83.02%. NH4＋-N removal was decreased with the increase of the flow rate in ceramic and activated carbon biofilter. Removal of NH4＋-N in ceramic biofilter was first increased and then decreased with the ratio of air/water and C∶N. In activated carbon biofilter,NH4＋-N removal was decreased with the ratio of C∶N and increased with the ratio of air/water. The ratio air/water has maximum impacting factor for removal of NH4＋-N. Nitrogen losses increased from 0.10 mg/L to 0.70 mg/L in ceramic biofilter,and from 0.11 mg/L to 1.01 mg/L in activated carbon biofilter. The amount of nitrogen loss was decreased with the flow rate increase,and increased with the increase air-water ratio. Nitrogen loss first increased and then decreased with the ratio of C∶N. The ratio air/water has maximum impacting factor for nitrogen losses.

关 键 词：饮用水生物滤池 氮亏损现象 NH4+-N去除 陶粒和活性炭 

分 类 号：X52[环境科学与工程—环境工程] TU991.2[建筑科学—市政工程]