To achieve high-efficiency and low-consumption stable removal of municipal wastewater

the start-up and nitrogen removal performance of partial nitration-anaerobic ammonium oxidation(Anammox) process were studied under normal temperature conditions. The results showed that real-time control strategy can quickly start partial nitrification under high DO (2.5 mg·L-1) conditions. The unique structure of biofilm provides Anammox bacteria with good anaerobic environment in the presence of dissolved oxygen. Overcame temperature changes during start-up. After 173 d

the removal rate of ammonia nitrogen and nitrite reaches more than 90%

the removal rate of total nitrogen (TN) approach to 80%. Anammox filter started successfully after 173 d. The nitrogen removal performance of the coupled system under different filtration conditions was studied. The results showed that the total nitrogen volumetric loading of the coupled system reached 0.75 kg·m-3·d-1 when the filtration rate was 0.5 m·h-1. The average concentration of TN in the effluent was 8 mg·L-1. The nitrogen of municipal wastewater could be treated stably and efficiently through partial nitrification-anaerobic ammonia oxidation process.