Denitrification process of deep bed denitrification filter for secondary effluent from urban sewage treatment plant

2018 International Conference on Civil and Hydraulic Engineering

土木建筑工程;水利工程

Wang, Qiaoshang^1 ; Yuan, Rongfang^1 ; Liu, Chengchen^1 ; Xu, Dandan^1 ; Zhou, Beihai^1

Department of Environment Engineering, School of Energy and Environmental Engineering, University of Science and Technology Beijing, Beijing

100083, China^1

关键词: Carbon and nitrogen ratios;    Denitrification filters;    Denitrification process;    Effluent concentrations;    Hydraulic retention time;    Nitrogen removal efficiency;    Urban sewage treatment;    Wastewater treatment plants;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/189/2/022002/pdf
DOI  :  10.1088/1755-1315/189/2/022002

学科分类：土木及结构工程学

来源: IOP

【 摘 要 】

In recent years, the sewage discharge standards are getting stricter, and advanced wastewater treatment is more important. Therefore, further advanced treatment of the effluent from the wastewater treatment plant has become a research hotspot. In this study, deep bed denitrification filter (DBDF) was used to treat secondary effluent from urban sewage treatment plants. The effects of different carbon and nitrogen ratios (C/N) and hydraulic retention time (HRT) on the nitrogen removal efficiency of the system were investigated. The results showed that the optimum C/N of the reactor was 5, and the optimum HRT was 0.5h. After running for 15 days under the optimal conditions, the results showed that DBDF ran stably, and the denitrification effect was good. The average effluent concentrations of COD and TN were 16.4 and 6.9mg/L, and the average removal rates were 77.0% and 57.7% respectively.