Liu Hong-Bo, Yang Chang-Zhu, Pu Wen-Hong, Lin Yong-Shan, Lan Dan
College of Environmental Science and Engineering, Huazhong University of Science and Technology, Wuhan 430074, China.
Huan Jing Ke Xue. 2009 Jul 15;30(7):2030-4.
The effect of ammonia concentration in influent on the characteristic of granular sludge was investigated in the granular SBR. Results indicated that the increase of ammonia concentration could induce filamentous growth. When the loading rate of ammonia was as high as 0.80 kg/(m3 x d), obvious disintegration of granules and washout of sludge were observed. However, in absent of ammonia, aerobic granules could not form either. Moreover, it was found that the increase of ammonia concentration could result in disperse structure, diameter increase, settleability and MLSS reduce of aerobic granular sludge system. The average removals of COD and TP by granular SBR could keep 90% and 70% respectively, and were not influenced by the increase of ammonia. But the activities of nitrification bacteria and denitrification bacteria were restricted seriously by the ammonia concentration increase. When loading rate of ammonia was increased from 0.48 kg/(m3 x d) to 0.80 kg/(m3 x d), the average removal rates of NH4(+) -N and TN reduced to 70% and 50%.
在颗粒序批式反应器（SBR）中研究了进水氨浓度对颗粒污泥特性的影响。结果表明，氨浓度的增加会诱导丝状生长。当氨负荷率高达0.80 kg/(m³·d)时，观察到颗粒明显解体和污泥流失。然而，在没有氨的情况下，也无法形成好氧颗粒。此外，发现氨浓度的增加会导致好氧颗粒污泥系统结构分散、直径增大、沉降性能变差以及混合液悬浮固体（MLSS）降低。颗粒SBR对化学需氧量（COD）和总磷（TP）的平均去除率分别可保持在90%和70%，且不受氨浓度增加的影响。但氨浓度的增加严重限制了硝化细菌和反硝化细菌的活性。当氨负荷率从0.48 kg/(m³·d)提高到0.80 kg/(m³·d)时，NH₄⁺-N和总氮（TN）的平均去除率分别降至70%和50%。
