[Quick Start-up of Anaerobic Ammonium Oxidation Process].

: In order to study the quick start-up process of anaerobic ammonium oxidation (ANAMMOX), two types of reactors with different hydraclic flow state inoculated with aerobic nitrifying sludge were investigated, the membrane bioreactor (MBR) and anaerobic baffled reactor (ABR), respectively. The result showed that both reactors successfully started up ANAMMOX process. The start-up period of the MBR (90 d) was 20% shorter than the ABR (111 d). During the stable operation, the average nitrogen (NH4+-N+NO2--N) removal capacity of 0.098 kg·(m3·d)-1 in the MBR was also higher than that of 0.089 kg·(m3·d)-1 in the ABR. In addition, the differences of sludge morphology were obvious in the two reactors; flocculent sludge was developed in the MBR while ANAMMOX granular sludge was mainly formed in the first compartment of the ABR. Moreover, the quantitative relationship analysis between NH4+-N, NO2--N and NO3--N showed that the MBR system contained more kinds of bacteria with nitrogen removal function, compared to the ABR, and it was therefore more conducive to the removal of nitrogen. MBR exhibited a more excellent performance for ANAMMOX start-up.