Institute of Agricultural Bio-Environmental Engineering, College of Bio-systems Engineering and Food Science, Zhejiang University, Hangzhou 310058, China; Aquaculture and Fisheries Group, Department of Animal Sciences, Wageningen University, WD Wageningen 6708, The Netherlands.
Institute of Agricultural Bio-Environmental Engineering, College of Bio-systems Engineering and Food Science, Zhejiang University, Hangzhou 310058, China; The Rural Development Academy, Zhejiang University, Hangzhou 310058, China.
Bioresour Technol. 2021 Mar;323:124568. doi: 10.1016/j.biortech.2020.124568. Epub 2020 Dec 28.
This study investigated the response of nitrogen removal performance and microbial community to different carbon composites in biofilm airlift reactors for wastewater treatment. Three reactors were filled with poly (butylene succinate) and bamboo powder composite at the blending ratio of 9:1, 1:1 and 1:9. Increasing the component of bamboo powder in the carrier reduced the carbon availability and had an adverse effect on nitrate removal efficiency. However, bamboo powder improved the ammonia removal rate which mainly through autotrophic nitrification. Three reactors exhibited distinct microbial compositions in both bacterial and fungal diversity. High inclusion of bamboo power decreased the relative abundance of denitrifiers Denitromonas and increased the relative abundance of nitrifiers, including Nitromonas, Nitrospina and Nitrospira. Moreover, correlation network revealed a competitive interaction between the taxa responsible for ammonia removal and nitrate removal processes. Those results indicated the feasibility of steering nitrogen removal pathway through carrier formulation in wastewater treatment.
本研究考察了生物膜气升式反应器中不同碳复合材料对氮去除性能和微生物群落的响应。三个反应器中填充了聚丁二酸丁二醇酯和竹粉复合材料，混合比例分别为 9:1、1:1 和 1:9。载体中竹粉成分的增加降低了碳的可用性，对硝酸盐去除效率产生了不利影响。然而，竹粉提高了氨去除率，这主要是通过自养硝化作用实现的。三个反应器在细菌和真菌多样性方面表现出明显不同的微生物组成。高含量的竹粉降低了反硝化菌 Denitromonas 的相对丰度，增加了硝化菌，包括 Nitromonas、Nitrospina 和 Nitrospira 的相对丰度。此外，相关网络分析揭示了负责氨去除和硝酸盐去除过程的分类群之间存在竞争相互作用。这些结果表明，通过载体配方在废水处理中引导氮去除途径是可行的。
