School of Environmental and Municipal Engineering, Qingdao University of Technology, Qingdao 266033, China.
School of Environmental and Municipal Engineering, Qingdao University of Technology, Qingdao 266033, China.
Bioresour Technol. 2024 Feb;394:130178. doi: 10.1016/j.biortech.2023.130178. Epub 2023 Dec 10.
In this study, an anaerobic/intermittently-aerated moving bed biofilm reactor (AnIA-MBBR) was proposed to realize simultaneous nitrification and endogenous denitrifying phosphorus removal (SNEDPR) in treating low carbon-to-nitrogen (C/N) ratio wastewater. The effect of different intermittent aeration modes (short and long aeration) on nutrients' removal was investigated. With the C/N ratio around 3, the removal efficiencies of total nitrogen and phosphorus were 90% and 74%, 88% and 59%, respectively, for short aeration and long aeration. The different aeration time also altered the nutrients' degradation pathway, biofilm characteristics, microbial community, and functional metabolic pathways. The results confirmed the occurrence of aerobic denitrifiers, anoxic denitrifiers, phosphorus accumulating organisms, glycogen accumulating organisms in AnIA-MBBR systems and their synergistic performance induced the SNEDPR. These results indicated that the application of AnIA in MBBR systems was an effective strategy to achieve SNEDPR, providing better simultaneous removal performance of nitrogen and phosphorus from low C/N ratio wastewater.
在这项研究中，提出了一种厌氧/间歇曝气移动床生物膜反应器（AnIA-MBBR），以实现在处理低碳氮比（C/N）废水时同时进行硝化和内源性反硝化除磷（SNEDPR）。考察了不同间歇曝气模式（短曝气和长曝气）对营养物质去除的影响。在 C/N 比约为 3 时，短曝气和长曝气的总氮去除率分别为 90%和 88%，磷去除率分别为 74%和 59%。不同的曝气时间也改变了营养物质的降解途径、生物膜特性、微生物群落和功能代谢途径。结果证实了好氧反硝化菌、缺氧反硝化菌、聚磷菌和糖原积累菌在 AnIA-MBBR 系统中的存在及其协同作用促进了 SNEDPR 的发生。这些结果表明，AnIA 在 MBBR 系统中的应用是实现 SNEDPR 的有效策略，可为低碳氮比废水提供更好的氮磷同步去除性能。
