Study on Nitrogen Removal Capacity of A2O-BAF in Domestic Wastewater and Microbial Community Characteristics
The performance of A2O and A2O-BAF systems in removing nitrogen and their microbial diversity were compared at various flow rates.The findings revealed that the A2O-BAF system had more microorganisms than the A2O system,and a small percentage of nitrifying bacteria(1%)played a stronger role in nitrification.The nitrification and denitrification efficiency of the A2O-BAF system was more stable,and it had a greater ability to adapt to impact load.The key players in the system for nitrification and denitrification are Proteobacteria,Bacteroidetes and Actinobacteria.Furthermore,the amount of biofilm attached to ceramics and microbial diversity in different filter layers were examined,and the correlation between biofilm and layer depth was explored,as well as the impact of wastewater treatment.It is crucial to optimize the design of wastewater treatment systems,enhance treatment efficiency,and minimize operating costs.