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波式潜流人工湿地对氮的去除效果研究
郭玉章, 赵楠, 王晓欧, 赵新华
天津大学环境科学与工程学院 天津 300072
摘要:
在不同的水力停留时间(HRT)、温度、碳氮比(COD/N)条件下,研究了波式潜流人工湿地(W-SFCW)试验装置对水体总氮和氨氮的去除效果。通过检测W-SFCW沿程各形态氮的含量,探讨了其对氮的去除原理。结果表明,HRT、温度、COD/N分别为5d,26.8℃,5条件下总氮去除率较高,可达74.92%此外,研究发现氨氮主要在浅水区通过硝化作用转化为NO3-N,所得的NO3-N通过深水区的反硝化作用转化为N2而得以去除。
关键词:  波式潜流人工湿地  水力停留时间  COD/N  温度  去除率
DOI:
分类号:
基金项目:天津市科技创新专项(08FDZDSF03200);水体污染污染控制与治理科技重大专项(2008ZX07314-004-002)
Treatment Efficiency of Wavy Subsurface Constructed Wetland for Removal of Nitrogen
GUO Yu-zhang, ZHAO Nan, WANG Xiao-ou, ZHAO Xin-hua
Environmental Science and Engineering College, Tianjin University Tianjin 300072 China
Abstract:
A lot of experiences were conducted in different hydraulic retention time(HRT),temperature and COD/N to explore the removal efficiency of TN,NH3-N in the water using the wavy subsurface constructed wetland(W-SFCW) test device,and to discuss the nitrogen removal principle by detecting nitrogen removal content in various forms along the path of W-SFCW device.The results showed that total nitrogen rate was higher and could amount to 74.92% when HRT,temperature,COD/ N were 5 d,26.8℃,5,respectively.In addition,we found that ammonia nitrogen was mainly in shallow water through the nitrification into NO3-N,and the NO3-N was removed through the deep water denitrification into Nz in the deep water.
Key words:  W-SFCW  HRT  COD/ N  temperature  removal rate