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：2020
卷号：571
期号：1
DOI：10.1088/1755-1315/571/1/012101
语种：English
出版社：IOP Publishing
摘要：To improve the nitrogen removal effects of domestic sewage and reactive mode, the two-stage limited aeration biofilm reactor was used to carry out an experiment. The pollutants removal effects and influencing factors were analyzed. The results indicate: Under the condition that the 1st reaction chamber DO of 1.5∼2 mg/L, the 2nd reaction chamber DO of 1∼1.5 mg/L, HRT=5 h, and influent ρ(COD) = 147∼181 mg/L, ρ(NH4+-N) = 35.1∼43.6 mg/L, ρ(TN) = 36.3∼44.1 mg/L, the maximal concentration of COD, NH4+-N, and TN in the last effluent were 18.8 mg/L, 0.35 mg/L and 14.2 mg/L, with the mean removal rates of 91.1%, 99.5%, 66.6% and the SND ratio of 62.7% ∼ 68.9%. Under the condition of 4.17h≤HRT≤5h, the effluent concentration of COD, NH4+-N met the Category III of environmental quality standards for surface water (GB3838-2002), and the effluent concentration of TN met the Class A discharge standard of pollutants for municipal wastewater treatment plant (GB18918-2002) with the SND ratio of 65.7%. Under the condition that the 1st reaction chamber DO of 1.5∼2 mg/L, the 2nd reaction chamber DO of 1∼1.5 mg/L, HRT=4.17 h, the SND effects can be improved by the means of additional sodium acetate in the 2nd reaction chamber. The TN removal rate and SND ratio were respectively 75.4% and 75.8% at the optimal dosage of 40 mg/L.
