Nitrogen and phosphorus removal characteristics at full scale before and after Bardenpho process upgrading reconstruction
In recent years,the controls of nitrogen and phosphorus in wastewater discharge standards are becoming stricter and stricter,so many wastewater treatment plants need to be upgraded.For Bardenpho process,it can be upgraded through anaerobic and aerobic tank capacity increasing and anoxic tank capacity decreasing.The changes of water quality,nitrogen and phosphorus removal activities and microbial community structure before and after upgrading reconstruction were studied at full scale.Results showed that total phosphorus and ammonia nitrogen in the effluent decreased to 0.09 and 0.24 mg/L after upgrading reconstruction,reaching Grade Ⅲ of"Environmental quality standards for surface water"(GB 3838-2002).After upgrading reconstruction,nitrification activity,denitrification activity and phosphorus removal activity all had upgraded.Microbial community structure analysis showed that Nitrospira was the dominant nitrification bacteria,Thauera the dominant denitrification bacteria,Acinetobacter the dominant aerobic phosphorus absorbing bacteria,and Paracoccus and Comamonas the dominant denitrification phosphorus absorbing bacteria.In total,increasing anaerobic and aerobic tank capacity and decreasing anoxic tank capacity could help to improve the efficiency of nitrogen and phosphorus removal in Bardenpho process,which would have a reference for upgrading of existing wastewater treatment plants.
Bardenpho processsludgenitrogen and phosphorus removalkineticsmicrobial community structure
万方数据
维普
