采用2个SBR反应器RUN1和RUN2在氨氮质量浓度分别为50、350 mg/L的条件下驯化污泥,考察氨氮浓度对污泥活性的影响；并在氨氮质量浓度分别为59、232、368、604和1 152 mg/L的条件下对2个反应器中的驯化污泥进行氨氮适应性试验.结果表明:在较高的氨氮浓度条件下,有机物降解菌对CODCr降解率下降约47％,硝化菌对氨氮的去除率下降约55％,脱氢酶活性下降约56.6％,显示出高浓度氨氮对有机物降解菌和硝化菌的活性都具有一定的抑制作用；当进水氨氮质量浓度从59 mg/L升至1 152 mg/L时,RUN1和RUN2中污泥对CODCr的去除率分别由89.2％和91.9％下降为40.5％和67.6％,对氨氮的去除率则分别由99.8％和99.9％下降为17.1％和22.2％,说明经高浓度氨氮驯化的污泥,其有机物降解菌和硝化菌都显示出对高浓度氨氮更好的适应性.%Two SBRs: RUN 1 and RUN 2 were used to acclimate sludge with ammonia nitrogen levels of 50 and 350 mg/L respectively. The influence of ammonina nitrogen concentration on activity of sludge was investigated; and series of parallel experiments on the adaptability of the acclimated sludge to the ammonia nitrogen with mass concentration of 59, 232, 368, 604 and 1 152 mg/L respectively were carried out. The results showed that, under high ammonia nitrogen concentration condition, the removal rates of CODCr and NH3-N by organic pollutant degradating bacteria and nitrifying bacteria decreased about 47% and 55% respectively, and the DHA (dehydrogenase activity) decreased about 56.6%, which displayed indicated the inhibition effect of high ammonia nitrogen concentration on the activities of organic pollutant degradating bacteria and nitrifying bacteria. When the ammonia nitrogen concentration increased from 59 mg/L to 1152 mg/L, the removal rates of CODCr by the acclimated sludge in RUN 1 and RUN 2 decreased from 89.2% and 91.9% to 40.5% and 67.6% respectively, and the removal rates of NH3-N decreased from 99.8% and 99.9% to 17.1% and 22.2% respectively. It could be seen that, the organic pollutant degradating bacteria and nitrifying bacteria in the sludge acclimated by high concentration ammonia nitrogen had better adaptability to high ammonia nitrogen concentration condition than that in the sludge acclimated by normal concentration ammonia nitrogen.
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