硝化生物膜启动厌氧氨氧化反应器的研究

Start-up of ANAMMOX Bioreactor by Nitrifying Biofilm

研究了以自养型硝化生物膜启动厌氧氨氧化反应器的可行性。试验结果表明,采用先培养自养型硝化生物膜再启动厌氧氨氧化反应器的方法,可在110d内成功启动厌氧氨氧化反应器,200d时反应器对NH4+-N和NO2--N的去除负荷分别达到0.526kg/(m3.d)和0.536kg/(m3.d)。启动初期的出水pH值低于进水pH值,到后期则出水pH值高于进水pH值。第110～200天时去除的NH4+-N和NO2--N的量与NO3--N的生成量之比为1:1.1:0.33;稳态运行时反应器内呈碱性。因此,NH4+-N去除量、NO2--N去除量和NO3--N生成量之间的比值以及反应器内pH值的变化可以指示厌氧氨氧化反应器的启动进程。

The start-up of the ANAMMOX bioreactor by autotrophic nitrifying biofilm was studied. The experimental results show that the ANAMMOX bioreactor can be initiated within 110 d when cultivating autotrophic nitrifying biofilm before the start-up of the bioreactor. At the 200th day, the volumetric loading rates of NH4^＋ -N and NO2^- -N are 0.526 kg/（ m^3 · d） and 0.536 kg/（ m^3 · d） respectively. At the beginning of the start-up phase, the effluent pH value is lower than the influent pH value, but gradually, the effluent pH value becomes higher than the influent pH value as the pH value of the liquid in the bioreactor is alkaline. Between the 110^th and 200^th day, the ratio of the NH4^＋ - N removal, the NO2^- - N removal and the NO3- - N production is 1 ： 1.1 ： 0.33. The variation in nitrogen ratio and also in pH can demonstrate the start-up progression of the bioreactor.