厌氧氨氧化反应器性能的稳定性及其判据

The stability of performance of anaerobic ammonium oxidation (ANAMMOX) reactors was studied and the indices of performance stability were compared.The results showed that under different types of shock load, the reactors with different configurations displayed different stability.The biofilm reactor stood first in stability towards substrate shock load, followed by anaerobic sequencing batch reactor (SBR) and the granular sludge bed.And the biofilm reactor took the first place towards hydraulic shock load, followed by the granular sludge bed and SBR.The three ANAMMOX reactors were more tolerant to hydraulic shock load than to substrate shock load.When different kinds of stability assessment indices(i.e., sensitivity ratio, mean variance ratio and derivative regression function) were used, inconsistent assessment conclusions were reached.It was suggested that the mean deviation ratio and derivative regression function were more effective and universal.

厌氧氨氧化膨胀床反应器的运行性能

试验研究了以竹炭为载体的厌氧氨氧化膨胀床反应器的运行性能。接种反硝化污泥,用模拟废水可成功启动该反应器;运行至144d时,容积总氮去除率达到3.02kg N/m3/d,这是国内文献报道的最高水平。动力学分析表明,这种反应器的最大容积总氮去除率可达12.77kg N/m3/d,具有很大的脱氮潜能。反应器的启动过程可分为菌体自溶、活性延滞和活性提高三个阶段。与此相应,污泥性状也从黄褐色絮状污泥变为棕灰色颗粒污泥和红色颗粒污泥。红色颗粒污泥以杆菌和球菌为主,厌氧氨氧化活性可达0.56mg TN/(mg protein)/h,它们是反应器厌氧氨氧化功能的主要承载者。