复合构建湿地运行初期理化性质及氮的变化  

PHYS-CHEMICAL CHARACTER AND NITROGEN CHANGES IN INTEGRATED CONSTRUCTED WETLAND AT THE INITIAL STAGE OF OPERATION

作　　者：贺锋[1] 吴振斌[1] 付贵萍[1] 陈辉蓉[1] 成水平[1] 熊丽[1] 邱东茹[1] 金建明[1] 李玉元[1] 

机构地区：[1]中国科学院水生生物研究所淡水生态与生物技术国家重点实验室,湖北武汉430072

出　　处：《长江流域资源与环境》2002年第3期279-283,共5页Resources and Environment in the Yangtze Basin

基　　金：中国科学院知识创新工程重要方向项目(KSCX2 SW 12 0 0 9);国家杰出青年基金项目 (3 992 5 0 0 7)资助;欧洲联盟合作项目(合同号ERBIC18CT960 0 5 9)

摘　　要：研究了在间歇式进水条件下 ,复合构建湿地系统对氮的去除效果 ,阐述了温度、溶氧、pH等理化因子变化的原因。实验初期 ,系统尚处于不稳定时期 ,对N的去除不够理想。随着系统运转逐步步入稳定状态 ,对KN、NH+ 4 N、NO-2 N有明显的去除效果 ,平均去除率分别为 5 0 %、6 6 %和 71%。硝化 -反硝化作用是氨氮去除的主要途径。从总体上看 ,有植物系统中硝态氮的出水含量较对照系统高 ,说明间歇式进水以及植物的存在都有利于硝化作用的发生。实验发现 ,复合构建湿地在冬季仍能较好地改善水质 ,是一种有效的水链管理对策 。This paper reported the removal efficiency of nitrogen in a downflow upflow constructed wetland purifying system with intermittent loading,and described the changes of temperature, dissolved oxygen and pH. The result indicated that the system was in unstable condition at the beginning of operation, and the removal efficiency was not remarkable. The removal efficiency of KN, NH\++\-4 N and NO\+-\-2 N become significant as the system becomes stable, and the average removal rates are 50%, 66% and 71% respectively. Nitrification is the predominant removal process of ammonia. Generally, the concentrations of nitrate in plants treatment system are higher than that in the control, which reveals that intermittent loading and the presence of plants are beneficial to nitrification. The research result shows that the downflow upflow system of constructed wetlands has a good performance in improving water quality in winter. It will be an important sense to improve water quality and restore degraded aquatic ecosystem.

关 键 词：复合构建湿地 间歇式进水 硝化作用 除氮 水质 水生态系统恢复 初期理化性质 

分 类 号：P941.78[天文地球—自然地理学] X171.4[环境科学与工程—环境科学]