School of Environmental and Safety Engineering, Jiangsu University, Zhenjiang 212013, China; Jiangsu Collaborative Innovation Center of Technology and Material of Water Treatment, Suzhou University of Science and Technology, Suzhou 215009, China.
School of Environmental and Safety Engineering, Jiangsu University, Zhenjiang 212013, China.
Water Sci Technol. 2024 Jul;90(1):270-286. doi: 10.2166/wst.2024.188. Epub 2024 Jun 7.
The completely autotrophic nitrogen removal over nitrite (CANON) process is significantly hindered by prolonged start-up periods and unstable nitrogen removal efficiency. In this study, a novel umbrella basalt fiber (BF) carrier with good biological affinity and adsorption performance was used to initiate the CANON process. The CANON process was initiated on day 64 in a sequencing batch reactor equipped with umbrella BF carriers. During this period, the influent NH-N concentration gradually increased from 100 to 200 mg·L, and the dissolved oxygen was controlled below 0.8 mg L. Consequently, an average ammonia nitrogen removal efficiency (ARE) and total nitrogen removal efficiency (TNRE) of ∼90 and 80% were achieved, respectively. After 130 days, ARE and TNRE remained stable at 92 and 81.1%, respectively. This indicates a reliable method for achieving rapid start-up and stable operation of the CANON process. Moreover, and were identified as dominant anammox genera on the carrier. was the predominant genus among ammonia-oxidizing bacteria. Spatial differences were observed in the microbial population of umbrella BF carriers. This arrangement facilitated autotrophic nitrogen removal in a single reactor. This study indicates that the novel umbrella BF carrier is a highly suitable biocarrier for the CANON process.
全程自养脱氮除亚硝（CANON）工艺受到启动时间长和脱氮效率不稳定的显著阻碍。在这项研究中，使用具有良好生物亲和性和吸附性能的新型伞状玄武岩纤维（BF）载体来启动 CANON 工艺。CANON 工艺在装有伞状 BF 载体的序批式反应器中于第 64 天启动。在此期间，进水 NH4+-N 浓度逐渐从 100 增加到 200mg·L-1，溶解氧控制在 0.8mg·L-1 以下。结果，氨氮去除效率（ARE）和总氮去除效率（TNRE）分别达到了约 90%和 80%。130 天后，ARE 和 TNRE 分别稳定在 92%和 81.1%。这表明了一种实现 CANON 工艺快速启动和稳定运行的可靠方法。此外，和 被鉴定为载体上的优势厌氧氨氧化菌属。是氨氧化菌中的主要属。伞状 BF 载体上的微生物种群存在空间差异。这种布置有利于在单个反应器中进行自养脱氮。本研究表明，新型伞状 BF 载体是一种非常适合 CANON 工艺的生物载体。
