摘要
采用连续流生物膜反应器,通过控制进水DO浓度在2.0 mg·L-1、2.5 mg·L-1、3.0 mg·L-1、3.5 mg·L-1、4.0 mg·L-1、4.5 mg·L-1左右,考察DO浓度对生物膜SND脱氮效果和N2O产量的影响.结果发现,当DO浓度为3.5 mg·L-1时,NH+4-N去除率在90%以上,TN去除率达到74.32%,生物膜SND效果最佳.DO浓度为3.0 mg·L-1时,系统N2O产量最大,转化率也最高,约为3.40%左右.从SND脱氮效果、节能降耗和控制N2O产量3方面考虑,将进水DO控制在3.5 mg·L-1左右比较合理,既可以达到良好的脱氮效果,又可以减少N2O的产量.
Continuous flow biofilm reactor were used under different DO concentrations （2.0mg·L-1、2.5mg·L-1、3.0nag·L-1、3.5mg·L-1、4.0mg·L-1、4.5mg·L-1 ） to investigate the effect of nitrogen re- moval on simultaneous nitrification and denitrification （SND） and the nitrous oxide （Na O） emission. The results showed that, when DO were controlled in 3.5 mg·L-1, the NH4＋ -N removal rate was above 90% , TN removal rate was 70. 98% and the effect of nitrogen removal on SND in biofilm reactor was optimal. When DO were con- trolled in 3.0 mg·L-1 , the production of N2O in the system was maximum with the N2Oconversion rate at 3.40%, the highest point. By taking the SND nitrogen removal, energy saving and the control of the production of N2O into consideration, DO should be controlled in 3.5 mg·L-1 a relatively reasonable DO concentration, which could not only achieve better effect of nitrogen removal, but also reduce the production of N2O.
出处
《广州大学学报（自然科学版）》
CAS
2016年第3期43-47,共5页
Journal of Guangzhou University:Natural Science Edition
基金
国家自然科学基金资助项目(51278133
21477027)
广东省科技计划资助项目(2014A020216049)
广州市教育系统创新团队资助项目(13C01)
