反硝化细菌
废水
硝化作用
污水处理
活性污泥
氮气
化学
反硝化
制浆造纸工业
化学工程
聚苯乙烯
环境工程
环境科学
聚合物
有机化学
工程类
作者
Ying Chen,Fengyuan Zhang,Xilin Shi,Mingyi Lu,Qin Kang,Qing Feng,Rongbo Guo
标识
DOI:10.1016/j.jece.2022.108164
摘要
This paper aims to improve the biological nitrogen removal performance by using magnetic polystyrene composite microparticles ([email protected]3O4). Three types of [email protected]3O4 with different surface morphologies were prepared by in-situ emulsion polymerization. Then, the optimum was creatively used as a biofilm carrier to form magnetic activated sludge (MAS) in lab-scale reactors. Compared to the conventional activated sludge, the utilization of [email protected]3O4 accelerated the sludge settling velocity to 0.76 m/h. In addition, the ammonium nitrogen removal, total nitrogen removal and simultaneous nitrification and denitrification improved by 7.08%, 24.27% and 19.53%, respectively. The dissolved oxygen concentration and pH were observed to reveal the effect of [email protected]3O4 on the nitrogen removal process. Based on microbial community analysis, there were more nitrifying and denitrifying bacteria in the MAS. Therefore, the novel developed [email protected]3O4 can be a promising utilization material as a biofilm carrier for biological wastewater treatment.
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