Research on nitrogen removal performance of membrane aerated biofilm reactor

Abstract

Membrane aerated biofilm reactor （MABR） effectively combines biofilm technology and membrane separation technology，which has great potential in wastewater denitrification. This paper focuses on the stability and nitrogen removal performance of MABR，which is used to treat soybean processing wastewater and simulated domestic wastewater. The results showed that when HRT was 12 h，aeration pressure was 10 kPa and C/N ratio was 5，MABR had the best treatment effect on simulated domestic sewage，and the average removal rates of COD，ammonia nitrogen and TN were 92.0%，86.5% and 83.3% respectively. When HRT was 8 h and aeration pressure was 10 kPa，MABR had the best treatment effect on soybean processing wastewater. The volume loads of COD，ammonia nitrogen， TN were 1 320，125.5，184 g/（m3·d） respectively，and the average removal rate had reached 84.2%，81.5%， 79.7% respectively，which was superior to the traditional biofilm method for nitrogen removal.

Keywords

• membrane aerated biofilm reactor
• denitrification
• c/n ratio
• aeration pressure
• soybean processing wastewater