摘要：

将硫（Na₂S、Na₂S₂O₃、S⁰）作为电子供体引入人工湿地，考察HRT、pH及碳源对脱氮效果的影响，分析不同硫对反硝化过程的促进作用。结果表明，pH=7、NO₃^--N 40 mg/L、C/N=0时，含Na₂S、Na₂S₂O₃、S的人工湿地的脱氮效率分别比对照组高27.83%、9.56%、8.36%。碳源充足时，添加Na₂S、Na₂S₂O₃、S的人工湿地脱氮效率比对照组提升48.31%、26.08%、25.44%，说明硫自养-异养联合反硝化效果优于自养反硝化。

关键词: 人工湿地, 反硝化, 硫, 硝氮去除率

Abstract:

Sulfur(Na₂S, Na₂S₂O₃, S⁰) were introduced into constructed wetlands as electronic donors. The effects of HRT, pH and carbon source on denitrification were investigated, and the effects of different sulfur on denitrification were analyzed. The results showed that at pH=7, NO₃^--N 40 mg/L and C/N=0, the nitrogen removal efficiency of constructed wetlands containing Na₂S, Na₂S₂O₃ and S was 27.83%, 9.56% and 8.36% higher than the control group respectively. When the carbon source was sufficient, the denitrification efficiency of constructed wetlands added with Na₂S, Na₂S₂O₃ and S increased by 48.31%, 26.08% and 25.44% compared with the control group, indicating that the effect of sulfur autotrophic-heterotrophic denitrification was better than that of autotrophic denitrification.

Key words: constructed wetland, denitrification, sulfur, nitrate removal rate

中图分类号: 

• X703.1