Effect of current on biofilm-electrode reactor coupled with sulfur autotrophic denitrification process (BER-SAD) for nitrate removal from wastewater

The biofilm-electrode reactor coupled with sulfur autotrophic denitrification process (BER-SAD) was used to remove nitrate in groundwater, and the effect of current intensity on characteristics explored. Current had a great influence process, maximum removal efficiency 99.9% lowest nitrite production were gained under optimum density 100 mA. Moreover, accumulation concentration SO 4 2- increased gradually increase intensity. With intensity, proportion hydrogen decreased, while increased.