Malaviya National Institute of Technology, Jaipur, India.
Malaviya National Institute of Technology, Jaipur, India.
Bioresour Technol. 2020 Oct;314:123737. doi: 10.1016/j.biortech.2020.123737. Epub 2020 Jun 25.
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 NH-N (removed) & NO-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.
本研究旨在评估位于印度斋浦尔的两个深层人工湿地（CW1 和 CW2）中经典氮去除途径的贡献。氮质量平衡表明，CW1 和 CW2 中 T-N 的 44.87%和 43.77%损失无法解释。为了阐明这些显著的损失，本研究扩展到评估整体氮去除过程中一种新途径（厌氧氨氧化）的发生和贡献。CW1 和 CW2 中 NH-N（去除）和 NO-N（产生）的比例表明，除微生物膜中的硝化-反硝化外，厌氧氨氧化可能是 CWs 中氮去除的关键途径之一。分子分析证实了内在形成的厌氧氨氧化菌的条带。该研究表明，深层湿地可为厌氧氨氧化菌的维持提供可行的选择，并可能有助于为 CWs 开发设计参数，以在类似的表面积下实现更高的 T-N 去除。
