期刊名称：IOP Conference Series: Earth and Environmental Science
印刷版ISSN：1755-1307
电子版ISSN：1755-1315
出版年度：2018
卷号：189
期号：2
页码：022002
DOI：10.1088/1755-1315/189/2/022002
语种：English
出版社：IOP Publishing
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.
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