复合垂直流人工湿地的脱氮机理及影响因素分析  

ANALYSIS OF NITROGEN REMOVAL MECHANISM AND INFLUENCE FACTORS IN INTEGRATED VERTICAL FLOW CONSTRUCTED WETLAND

作　　者：张迎颖[1] 丁为民[1] 陈秀娟[2] 李新宇 刘静[1] 

机构地区：[1]南京农业大学工学院,南京210031 [2]常州市排水管理处,江苏常州213002 [3]无锡市城北污水处理厂,江苏无锡214002

出　　处：《环境工程》2009年第5期36-40,共5页Environmental Engineering

基　　金：江苏省200 8年度普通高校研究生科研创新计划(CX08B-135Z)

摘　　要：采用沸石和砾石作为填料,研究复合垂直流人工湿地处理农村生活污水的脱氮机理。试验结果表明:复合垂直流人工湿地对污水中氮的去除主要发生在下行流填料柱中,其去除机理主要是微生物对溶解态氮的硝化和反硝化作用;悬浮态氮沉积在填料孔隙中,会出现"氮释放"现象;水温、气水比、碳氮比、氮源形式等因素对湿地系统的脱氮效率有显著影响。The nitrogen removal mechanism was investigated in the integrated vertical flow constructed wetland which took zeolite and gravel as fillers to treat rural domestic sewage. Based on the experiments, the results showed that nitrogen was mostly removed in the down-flow colunm and the major dissolved nitrogen was removed by nitrification and denitrification of microogranism. Suspendednitrogen which sedimentated in filler pore could cause nitrogen-releasing phenomenon. The factors including temperature, gas-flow ratio, C/N ratio and nitrogen-source forms had significant influence on nitrogen removal efficency.

关 键 词：复合垂直流人工湿地 农村生活污水 脱氮机理 影响因素 

分 类 号：X703[环境科学与工程—环境工程]