Comparative experimental study on nitrogen removal performance of aerobic MBR and batch MBR

domestic sewage;  aerobic membrane bioreactor;  batch membrane bioreactors;  Denitrification

The nitrogen removal effect of aerobic membrane bioreactor (MBR) and batch membrane bioreactor in the treatment of domestic wastewater was compared. The results show that when the COD value, nitrogen load and COD/TN value of the influent water change greatly, the batch MBR can obtain a high nitrogen removal effect by flexibly changing the operating conditions, and show good shock load resistance. In terms of TN removal, batch MBR was significantly better than aerobic MBR, with average removal rates of 63.9% and 15.34%, respectively. In terms of NH3-N removal, the average removal rate of batch MBR was 87.4%, while aerobic MBR required the addition of alkaline substances to obtain a high removal effect, with an average removal rate of 78.7%.