School of Environmental and Municipal Engineering, Tianjin Chengjian University, Jinjing Road 26, Tianjin, 300384, China; Tianjin Key Laboratory of Aquatic Science and Technology, Jinjing Road 26, Tianjin, China; Joint Research Centre for Protective Infrastructure Technology and Environmental Green Bioprocess, School of Environmental and Municipal Engineering, Tianjin Chengjian University, Tianjin, 300384, China.
School of Environmental and Municipal Engineering, Tianjin Chengjian University, Jinjing Road 26, Tianjin, 300384, China; Tianjin Key Laboratory of Aquatic Science and Technology, Jinjing Road 26, Tianjin, China; Joint Research Centre for Protective Infrastructure Technology and Environmental Green Bioprocess, School of Environmental and Municipal Engineering, Tianjin Chengjian University, Tianjin, 300384, China.
Environ Res. 2020 Jul;186:109581. doi: 10.1016/j.envres.2020.109581. Epub 2020 Apr 28.
By manipulating influent nitrogen load and DO concentration in bulk liquid, the start-up and performance of a new micro-granule based partial nitritation-anammox process was investigated in a continuous stirred tank reactor (CSTR). Under the condition of nitrogen loadings from 0.3 to 1.4 kgN /m³/d and DO <0.21mg/L, the single-stage partial nitritation-anammox (SPNA) system was successfully started, with a nitrogen removal of 76.2%. Meanwhile, the oxygen utilization efficiency by ammonium oxidizing bacteria (AOB) increased in the system with the increase of influent ammonia loading rate. Micro-granules with an average diameter of 0.25 mm were formed. Sludge granulation was promoted by increasing influent nitrogen load, and there was a positive correlation between nitrogen load, extracellular polymeric substances (EPS) content and sludge particle size. Ca. Kuenenia became the dominant anaerobic ammonium oxidizing bacteria (AnAOB) in the SPNA system. As the dominant AOB genera, Nitrosomonas coexist with Ca. Kuenenia in the micro-granules.
通过控制进水的氮负荷和主体液相中的溶解氧浓度，在连续搅拌式反应器（CSTR）中对一种新型基于微颗粒的部分亚硝化-厌氧氨氧化工艺的启动和性能进行了研究。在氮负荷为 0.3 到 1.4kgN/m³/d，DO <0.21mg/L 的条件下，成功启动了单级部分亚硝化-厌氧氨氧化（SPNA）系统，脱氮率达到了 76.2%。同时，随着进水氨氮负荷的增加，氨氧化菌（AOB）的氧气利用率也有所提高。系统中形成了平均直径为 0.25mm 的微颗粒。通过提高进水氮负荷促进了污泥颗粒化，氮负荷、胞外聚合物（EPS）含量和污泥粒径之间存在正相关关系。Ca. Kuenenia 成为 SPNA 系统中的优势厌氧氨氧化菌（AnAOB）。作为优势 AOB 属，Nitrosomonas 与 Ca. Kuenenia 共同存在于微颗粒中。
