STUDY ON OPERATION PERFORMANCE AND SLUDGE CHARACTERISTICS IN AN ANAMMOX ATTACHED FILM EXPENDED BED

Abstract

 The possibility of AAFEB-Anammox reactor applied for high nitrogen loading rate is investigated in a continuous experiment operated at 35°C. The nitrogen loading rate (NLR) was changed periodically to study the performance at each condition. The removal efficiency, specific Anammox activity (SAA) and sludge characteristics were investigated. As a result, at NLR as high as 40gN/L/d, the TN removal efficiency reached 87.97 ± 1.00%. Maximum specific Anammox activity (MSAA) under condition of NLR 30gN/L/d showed 0.68 ± 0.07gN/gVSS/d. The Anammox granule formed in the reactor showed very good settleability with a setting velocity over 263.1 ± 26.9m/h. It was revealed that AAFEB-Anammox reactor is suitable for high nitrogen loading rate.