2种UASB的ANAMMOX与反硝化协同作用对比研究
Comparative study of ANAMMOX-denitrification synergism in two UASB-reactors
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摘要: 采用2套UASB-ANAMMOX反应器处理垃圾渗滤液，其中反应器2具有生物膜，对反应器在有机环境下的ANAMMOX与反硝化协同作用进行对比研究。在稳定期，反应器1和反应器2对氨氮、亚硝氮、TIN、COD的平均去除率分别为95.7%、95.9%、77.3%、70.3%和97.4%、96.4%、87.2%、74.8%。反应器1对TIN和COD最大容积去除率为112.2和107.7 g/(m3·d)，反应器2对TIN和COD最大容积去除率为120.5和119.9 g/(m3·d)。结果表明，过高的负荷会对反应器产生抑制作用，且当抑制产生后协同作用难以恢复到原来水平。在厌氧氨氧化与反硝化协同作用良好时， pH值和碱度均存在特征性变化。总体上，反应器2比反应器1具有更强的厌氧氨氧化与反硝化协同作用和抗负荷冲击能力。Abstract: Comparative study on treatment of the diluted leachate, by anaerobic ammonium oxidation (ANAMMOX) coupled with denitrification, was carried out with two upflow anaerobic sludge blanket (UASB) reactors, reactor 2 with biofilm and reactor 1 without it. During the steady states, the average removal efficiencies of ammonium, nitrite, TIN and COD in reactor 1 were 95.7%，95.9%，77.3%，70.3%, and corresponding to that in reactor 2 were 97.4%，96.4%，87.2% and 74.8%, respectively. The maximum volumetric loading conversion rates of TIN and COD in reactor 1 were 112.2 and 107.7 g/(m3·d), corresponding to that in reactor 2 were 120.5 and 119.9 g/(m3·d), respectively. The synergism in the reactors was inhibited due to overload, and was hard to recover to the previous performance once overload taken place. When the synergism was in a good state, characteristic changes were presented in the pH value and alkalinity. Reactor 2 with biofilm was found to be more active than reactor 1 without biofilm in the synergism and in loading shock resistance.
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