ASBBR反应器厌氧氨氧化反应稳定性研究

STUDY ON THE STABILITY OF ANAMMOX ASBBR

利用已经成功启动的ASBBR反应器,通过不同的进水基质浓度,不同进水亚硝态氮、氨氮质量比和不同冲水比3个因素的交替变化,研究了厌氧氨氧化反应器脱氮效能稳定性的影响。当进水亚硝态氮与氨氮质量比在1～1.3的范围内变动时,对反应器内厌氧氨氧化反应的脱氮效能几乎没有影响,表明ASBBR反应器具有较高的抗负荷冲击能力。当进水后反应器内亚硝态氮质量浓度大于80mg.L-1时,将导致反应器的总氮去除率下降,并且随着亚硝态氮浓度的增加,脱氮效果会越来越差。同时研究还表明水力冲击不会引起厌氧氨氧化反应器出现微生物流失,但随着水利负荷的增加,厌氧氨氧化细菌对新环境适应时间将会延长,导致相同周期内反应器脱氮效能的下降。

Based on the successful start-up of ASBBR reactor and changing the ratio ofinfluent concentration of NO2^- -N/NH4^＋-N and water filling ratio periodically, the stability of nitrogen removal in process was studied. There was hardly impact on the nitrogen removal when the ratio ofinfluent NO2^--N to NH4^＋ -N was in the range of 1 -1.3,The results showed that the ANAMMOX reactor had strong ability to resist shock load, and the total nitrogen decreased when the concentration of NO2^- -N increased to 80 mg ·L^-1 in the reactor, and the nitrogen removal would worsen with the increasing concentration of NO2^- -N. The results also showed that different hydraulic shock load did not cause the wash-out of microbial mass which would lower the nitrogen removal. With the increase of water filling ratio, ANAMMOX bacteria would have long adaptation to new condition, which resulted in the nitrogen removal decrease with the same period.