Effect of NO2--N Concentration on Denitrifying Phosphorus Accumulating of Nitrosation Denitrifying Phosphorus Accumulating Organisms

Separating NDPAOs from the continuous flow double sludge nitrosation denitrifying phosphorus removal system, purifying and preliminary identifying them, discussing the effect of NO2--N concentration on the performance of denitrifying phosphorus accumulating of NDPAOs by the way of pure training. The results showed that the identified organism Veillonella could treat NO2--N as electronic receptors when the NO2--N concentration was 60mg/L; when the NO2--N concentration raised to 65mg/L, phosphorus accumulating was not normal; the denitrifying was abnormal while the NO2--N concentration further raised to 70mg/L; when the NO2--N concentration was 80mg/L, characteristics of phosphorus uptake and denitrifying had suffered serious inhibition.