State Key Joint Laboratory of Environmental Simulation and Pollution Control, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China; University of Chinese Academy of Sciences, Beijing 100049, China.
State Key Joint Laboratory of Environmental Simulation and Pollution Control, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China.
Bioresour Technol. 2020 Nov;315:123837. doi: 10.1016/j.biortech.2020.123837. Epub 2020 Jul 15.
A challenge during the startup of the combined partial nitritation and anammox process is how to balance dissolved oxygen control and nitrite accumulation for converting partial nitritation into anammox, maintaining stable partial nitritation and promoting growth of anammox bacteria. An innovative regulation strategy of nitrite dosing and dissolved oxygen control in this study was developed to achieve the rapid startup of a full-scale combined partial nitritation and anammox reactor within 77 days and the total nitrogen removal rate of reactor was 0.097 kg N/kgMLSS·d, and the activity and gene copy concentration of anammox bacteria reached 0.307 kg N/kgMLVSS·d and 7.79 × 10 copies/gMLVSS, respectively. Microbial community analysis revealed that Candidatus_Kuenenia and Nitrosomonas were the dominant nitrogen transformation bacteria with an abundance of 2.49% and 14.86%, respectively. This study offers a new method for rapid startup and spreading application of the full-scale anammox process.
在启动联合部分亚硝化和厌氧氨氧化工艺过程中面临的一个挑战是如何平衡溶解氧控制和亚硝酸盐积累，以将部分亚硝化转化为厌氧氨氧化，保持稳定的部分亚硝化并促进厌氧氨氧化菌的生长。本研究开发了一种亚硝酸盐投加和溶解氧控制的创新调控策略，可在 77 天内实现全规模联合部分亚硝化和厌氧氨氧化反应器的快速启动，反应器的总氮去除率达到 0.097kgN/kgMLSS·d，厌氧氨氧化菌的活性和基因拷贝浓度分别达到 0.307kgN/kgMLVSS·d 和 7.79×10 拷贝/gMLVSS。微生物群落分析表明，Candidatus_Kuenenia 和 Nitrosomonas 是主要的氮转化细菌，丰度分别为 2.49%和 14.86%。本研究为全规模厌氧氨氧化工艺的快速启动和推广应用提供了一种新方法。
