Centre for Urban Environmental Remediation, Beijing University of Civil Engineering and Architecture, Beijing, 100044, China; Collaborative Innovation Center of Energy Conservation & Emission Reduction and Sustainable Urban-Rural Development in Beijing, Beijing University of Civil Engineering and Architecture, Beijing, 100044, China; Key Laboratory of Urban Stormwater System & Water Environment (Ministry of Education), Beijing University of Civil Engineering and Architecture, Beijing, 100044, China; CAUPD (Beijing) Planning & Design Consultants Ltd, Beijing, 100044, China.
Centre for Urban Environmental Remediation, Beijing University of Civil Engineering and Architecture, Beijing, 100044, China; Collaborative Innovation Center of Energy Conservation & Emission Reduction and Sustainable Urban-Rural Development in Beijing, Beijing University of Civil Engineering and Architecture, Beijing, 100044, China; Key Laboratory of Urban Stormwater System & Water Environment (Ministry of Education), Beijing University of Civil Engineering and Architecture, Beijing, 100044, China.
Chemosphere. 2024 Oct;366:143416. doi: 10.1016/j.chemosphere.2024.143416. Epub 2024 Sep 27.
The plug-flow fixed bed reactors with zeolite/tourmaline-modified polyurethane carriers (PFBR) and polyurethane carriers (PFBR) were operated to assess the fluctuating influent C/N impact on the system performance and the carrier effect on the enhancing the system operation. Result suggested that fluctuations in influent C/N and variations in operational temperature reduced the removal performance and system stability within PFBR. The negative impact of C/N fluctuation could be effectively mitigated by effluent reflux. In contrast, PFBR performance and operational stability of maintained at high level with a greater nitrogen removal rate (0.18 kg N·(m³·d)). Redundancy analyses showed that the fluctuations in influent C/N dramatically affected the microbiome structure in PFBR, and the leading influencing factor was shifted to the fluctuating amount of influent C/N, which in turn reduced the system performance and stability. ZTP carriers could maintain the balance of main functional bacterial activity and abundance and promote the partial denitrification process with a higher Thauera abundance of 0.48%.
采用沸石/电气石改性聚氨酯载体填充床固定化微生物反应器（PFBR）和普通聚氨酯载体填充床固定化微生物反应器（PFBR）来评估进水 C/N 波动对系统性能的影响以及载体对增强系统运行的影响。结果表明，进水 C/N 的波动和操作温度的变化降低了 PFBR 内的去除性能和系统稳定性。出水回流可以有效减轻 C/N 波动的负面影响。相比之下，PFBR 性能和操作稳定性得以维持在较高水平，具有更高的氮去除率（0.18kgN·（m³·d））。冗余分析表明，进水 C/N 的波动显著影响了 PFBR 中的微生物群落结构，主导影响因素转变为进水 C/N 的波动量，从而降低了系统性能和稳定性。ZTP 载体可以维持主要功能细菌活性和丰度的平衡，并促进部分反硝化过程，Thauera 的丰度达到 0.48%。
