Achieving advanced nitrogen removal from low C/N wastewater by combining endogenous partial denitrification with anammox in mainstream treatment.
Achieving advanced nitrogen removal from low C/N wastewater by combining endogenous partial denitrification with anammox in mainstream treatment.
复制标题
DOI：
10.1016/j.biortech.2018.08.124
复制
发表时间：
2018-12
影响因子：
11.4
通讯作者：
Jiantao Ji;Yongzhen Peng;Wenke Mai;Jianzhong He;Bo Wang-;Xiyao Li;Qiong Zhang
中科院分区：
文献类型：
--
作者：
Jiantao Ji;Yongzhen Peng;Wenke Mai;Jianzhong He;Bo Wang-;Xiyao Li;Qiong Zhang
主流厌氧氨氧化的成功应用将有利于能源和资源节约型污水处理。本研究提出了一种实现主流厌氧氨氧化的新策略，结合内源部分反硝化（EPD）来处理生活污水。在该EPD-Anammox系统中，EPD稳定产生亚硝酸盐，硝酸盐到亚硝酸盐的转化率为80%。通过调节厌氧反应后EPD反应器的体积交换比，获得适合厌氧氨氧化反应的NO2−N/NH4+-N比率～1.20。此外，结果显示，在低 C/N (∼2.9) 下，具有稳定、高的脱氮效率 (90%)，出水总氮为 5.8mgN/L。由于环保署提供稳定的亚硝酸盐供应，厌氧氨氧化贡献了总脱氮量的 49.8%。具有内源反硝化潜力的反硝化糖原积累生物（GAOs，36.6％）和Candidatus Brocadia（34.6％）分别在EPD-SBR和anammox-UASB中占主导地位，负责高亚硝酸盐积累和厌氧氨氧化反应。
Successful application of mainstream anammox would be favorable for energy- and resource-efficient sewage treatment. This study presents a new strategy to achieve mainstream anammox, which combined with endogenous partial denitrification (EPD) for treating sewage wastewater. In this EPD-Anammox system, nitrite was stably produced by EPD with a nitrate-to-nitrite transformation ratio of 80%. Through adjusting the volume exchange ratio of EPD-reactor after anaerobic reaction, a suitable NO2−-N/NH4+-N ratio of ∼1.20 for anammox reaction was achieved. Further, results showed a stable, high nitrogen removal efficiency (90%) with an effluent total nitrogen of 5.8 mg N/L under low C/N (∼2.9). Anammox contributed 49.8% of the overall nitrogen removal owing to the steady nitrite supply from EPD. Denitrifying glycogen-accumulating organisms (GAOs, 36.6%) having potential for endogenous denitrification andCandidatus Brocadia(34.6%) were respectively dominated in the EPD-SBR and anammox-UASB and responsible for the high nitrite accumulation and anammox reaction.