%0 Journal Article
%T Removal Nitrogen in Wavy Subsurface-flow Constructed Wetland Utilizing Aeration and Recirculation<br>利用充氧和回流强化波形潜流人工湿地的脱氮效果
%A REN Yong-zheng
%A ZHANG Bei-ping
%A HAI Ben-zeng
%A <br>任拥政
%A 章北平
%A 海本增
%J 环境科学
%D 2007
%I 
%X To improve the removal rates of ammonium nitrogen in the constructed wetlands, the traditional wavy subsurface-flow constructed wetland (W-SFCW) was modified to install the aeration tube in the second wave interval to improve the DO and the nitrification rates within the constructed wetlands. It was found that as most of COD had been removed in the second wave interval, nitrifying bacteria become dominant in the third wave interval, which led to the nitrification extent reaching more than 90%, and the ability to endure the impact of hydraulic loading was enhanced. Recirculation rates of 50% were adopted to evaluate the effect on TN removal. It showed that with effluent recirculation the average removal efficiencies of TN obviously increased to 50% when the wastewater entered 1/3 of the wetland not infall. The hydraulic loading of wetland reached 0.8 m3/(m2 x d), and COD organic loading was 56-112 g/(m2 x d), and the ammonium loading rate was 20-28 g/(m2 x d).
%K wavy subsurface-flow constructed wetland
%K aeration
%K recirculation
%K removal TN
%K nitrification<br>波形潜流人工湿地
%K 充氧
%K 回流
%K 脱氮
%K 硝化
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=3FF3ABA7486768130C3FF830376F43B398E0C97F0FF2DD53&cid=A7CA601309F5FED03C078BCE383971DC&jid=64CD0AA99DD39F69401C615B85F123EF&aid=1AFD4DF8469E8C59AF65968847FC35D5&yid=A732AF04DDA03BB3&vid=D3E34374A0D77D7F&iid=59906B3B2830C2C5&sid=BAF57314E6F4EA41&eid=45CB7E0782363B9E&journal_id=0250-3301&journal_name=环境科学&referenced_num=3&reference_num=23