Interaction of the concentration of S^2–, SO₄^2– and microbial community by controlling nitrogen stripping during sulfate-rich wastewater treatment

Nitrogen stripping plays a vital role during the sulfate-rich wastewater treatment process by sulfate-reducing bacteria (SRB). However, interaction between nitrogen stripping, sulfate reduction capacity, S2– concentration, and microbial community structure is rarely studied. Here, two anaerobic systems were conducted to analyze these interactions simultaneously. Results showed that toxic products (H2S) stripped at first. Then, increased relative abundance of fermentative accelerated carbon sources conversion, Desulfovibrio, Dethiosulfovibrio, Sulfurospirillum facilitated after stripping. Finally, produced S2− concentration was 12%, rate 9.2% compared without