%0 Journal Article
%T Relationship Between the Nitrogen Removal and Oxygen Demand in Constructed Wetlands<br>人工湿地氮转化与氧关系研究
%A HE Lian-sheng
%A LIU Hong-liang
%A XI Bei-dou
%A ZHU Ying-bo
%A WEI Zi-min
%A HUO Shou-liang
%A WEI Zi-min
%A HUO Shou-liang
%A <br>何连生
%A 刘鸿亮
%A 席北斗
%A 朱迎波
%A 魏自民
%A 霍守亮
%J 环境科学
%D 2006
%I 
%X A simplified model of sequential N transformations and sink was applied to investigate the relationship between the nitrogen removal and oxygen demand to verify the validity of full nitrification-denitrification mechanism in a newly-built multi-stages constructed wetlands. Average net rates of N mineralization ranged from 0.01 to 0.28 g x (m2 x d)(-1), nitrification from 0.50 to 1.54 g x (m2 x d)(-1), denitrification from 0.41 to 1.13 g x (m2 x d)(-1)(3.4% approximately 35.4% of measured N removal in different stage) and plant assimilation from 0.07 to 0.26 g x (m2 x d)(-1) in the five tanks. Nitrification and denitrification occurred concurrently with BOD removal, even in the first stage receiving the higher-strength wastewater. Surprisingly, net areal nitrification rates, was correlated with BOD removal rates positively. Nitrification rates were also correlated linearly with average NH4+-N concentrations in the cascade tanks. The nitrogenous oxygen demand (NOD) required to support full nitrification of ammonia and mineralized Org-N in the wetland was in the upper range of that expected to be able to be supplied through surface and plant-mediated oxygen transfer. Some potential alternative nitrogen removal pathways with reduced overall oxygen requirements that have relevance to constructed wetlands were discussed.
%K constructed wetlands
%K nitrification
%K denitrification
%K nitrogen oxygen demand<br>人工湿地
%K 硝化
%K 反硝化
%K 硝化需氧量
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=3FF3ABA7486768130C3FF830376F43B398E0C97F0FF2DD53&cid=A7CA601309F5FED03C078BCE383971DC&jid=64CD0AA99DD39F69401C615B85F123EF&aid=A13006C1813CFDDD&yid=37904DC365DD7266&vid=DB817633AA4F79B9&iid=B31275AF3241DB2D&sid=74253B3A525E9002&eid=DE3C727FE2D9509D&journal_id=0250-3301&journal_name=环境科学&referenced_num=16&reference_num=14