厌氧活性污泥对闲置厌氧氨氧化污泥再启动影响

The Influence of Anaerobic Activated Sludge on the Restart Process of Idle Anammox Sludge

为研究厌氧活性污泥接种量对闲置厌氧氨氧化污泥再启动过程影响,通过运行接种不同量厌氧活性污泥及厌氧氨氧化闲置污泥的4个厌氧序批式活性污泥法反应器(SBR),对比研究了不同接种量对厌氧氨氧化菌再启动过程中基质氮去除情况。结果表明,闲置厌氧氨氧化反应器再启动周期最短,经过92 d运行,接种闲置污泥的反应器NH_(4)^(+)-N和NO_(2)^(-)-N去除率恢复至91.52%和93.62%;75 mL闲置厌氧氨氧化污泥混合25 mL新鲜厌氧污泥的厌氧氨氧化再启动时间最长,经过92 d运行基质氮去除率低于43%;闲置厌氧氨氧化污泥的再启动过程与利用普通厌氧污泥初次启动厌氧氨氧化反应相比缺少了活性迟滞阶段,在菌体自溶阶段结束后NH4+-N去除率随即开始升高。

The influence of anaerobic activated sludge inoculation amount on the restart process was investigated for the idle anammox sludge.The 4 anaerobic SBR reactors were inoculated with different amounts of anaerobic activated sludge and anaerobic ammonia oxidation idle sludge.The removal of substrate nitrogen during the restart process of anammox bacteria with different inoculation amounts was compared.The results showed that the restart cycle of the idle anammox reactor is the shortest.After the operation of 92 d,the NH_(4)^(+)-N and NO_(2)^(-)-N removal rates of the reactor inoculated with idle sludge recovered to 91.52%and 93.62%,respectively.The 75 mL ammonia oxidation sludge in the idle anaerobic reactor mixed with the 25 mL fresh anaerobic sludge has the longest anaerobic ammonia oxidation restart time.After the operation of 92 d,the removal rate of matrix nitrogen was less than 43%.Compared with the initial start-up of the anaerobic ammonia oxidation reaction using ordinary anaerobic sludge,the restart process of idle anammox sludge lacks an active lag phase,and the removal rate of NH4+-N starts to increase after the autolysis phase of the bacteria ends.