通过两段式部分硝化-同步厌氧氨氧化和反硝化（PN-SAD）工艺从城市废水中进行高级脱氮。
Advanced nitrogen removal from municipal wastewater via two-stage partial nitrification-simultaneous anammox and denitrification (PN-SAD) process.
机构信息
National Engineering Laboratory for Advanced Municipal Wastewater Treatment and Reuse Technology, Engineering Research Center of Beijing, Beijing University of Technology, Beijing 100124, PR China.
National Engineering Laboratory for Advanced Municipal Wastewater Treatment and Reuse Technology, Engineering Research Center of Beijing, Beijing University of Technology, Beijing 100124, PR China.
出版信息
Bioresour Technol. 2020 May;304:122955. doi: 10.1016/j.biortech.2020.122955. Epub 2020 Feb 4.
A modified two-stage anammox process was constructed and achieved advanced nitrogen removal from municipal wastewater. The first stage was Partial Nitrification (PN), in which nitrite accumulation rate was over 95% by controlling dissolved oxygen concentration (<1 mg/L) and aeration time (90-120 min). The second stage was simultaneous anammox and denitrification (SAD), in which the reactor was fed with the effluent of the first stage and a part of raw wastewater. The effluent total inorganic nitrogen (NH-N, NO-N and NO-N) was only 1.6 ± 0.8 mg N/L and the nitrogen removal efficiency reached 97.1%. The proportion of anammox in nitrogen removal was up to 73-82% and Candidatus Brocadia was the main anammox genus accounted for 8.0-2.2%. And partial denitrification occurred with the appearance of Thauera (0-1.0%). The PN-SAD process is an energy-saving treatment for municipal wastewater with a total hydraulic retention time of 6 h.
构建了改良的两段式厌氧氨氧化工艺，实现了从城市废水中的深度脱氮。第一阶段为部分硝化（PN），通过控制溶解氧浓度（<1mg/L）和曝气时间（90-120min），亚硝酸盐积累率超过 95%。第二阶段为同步厌氧氨氧化和反硝化（SAD），向反应器中加入第一阶段的出水和部分原水。出水总无机氮（NH-N、NO-N 和 NO-N）仅为 1.6±0.8mgN/L，氮去除率达到 97.1%。厌氧氨氧化在脱氮中的比例达到 73-82%，其中Candidatus Brocadia 是主要的厌氧氨氧化菌，占 8.0-2.2%。同时出现了少量的 Thauera（0-1.0%），发生了部分反硝化作用。PN-SAD 工艺是一种节能型城市污水处理工艺，水力停留时间总时长为 6 小时。
Zotero 插件