厌氧氨氧化膨胀床反应器的运行性能

Performance of ANAMMOX Attached Microbial Film Expanded Bed Reactor

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。

The anaerobic ammonium oxidation was successfully started up within 144 d in attached microbial film expanded bed reactor with bamboo carbon as carriers. The maximum nitrogen removal rate reached 3.02 kgN/m3/d, which was the highest level in China. The reactor has a great potential in nitrogen removal compared to the theoretical value 12.77 kgN/m3/d deduced from dynamic fit. As the start-up course experienced autolysis phase, activity lag phase and activity elevation phase, the seed sludge turned from khaki flocs to sandy brown granules and finally to red granules. These red granules with a relatively high anaerobic ammonium oxidation （ANAMMOX） activity of 0.56 mgTN/（mg protein）/h were major contributors to the ANAMMOX process in the reactor.