厌氧氨氧化菌
反硝化
湿地
氮气
污水
环境化学
环境工程
环境科学
污水处理
化学
生物
生态学
反硝化细菌
有机化学
作者
Aakanksha Rampuria,Akhilendra Bhushan Gupta,Urmila Brighu
标识
DOI:10.1016/j.biortech.2020.123737
摘要
This work was aimed to assess the contribution of classical nitrogen removal pathways in two deep constructed wetlands CW1 and CW2 located at Jaipur, India. Nitrogen mass balance revealed that 44.87% and 43.77% losses of T-N in CW1 and CW2 were unaccounted for. To elucidate these significant losses, the study was extended to assess the occurrence and contribution of a novel pathway (ANAMMOX) in overall nitrogen removal. The ratio of NH4+-N (removed) & NO3--N (produced) in CW1 & CW2 indicated that ANAMMOX could be one of the key pathways for nitrogen removal in the CWs besides nitrification-denitrification in microbial films. The molecular analysis confirmed bands of ANAMMOX bacteria developed intrinsically. The study revealed that deep wetlands can offer a feasible option for the sustenance of ANAMMOX bacteria and may help develop design parameters for CWs for achieving higherT-N removal withsimilarsurface area as that of conventional wetlands.
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