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摘要厌氧氨氧化(Anammox)是一个很有前景的生物脱氮工艺，通过实验室规模的厌氧氨氧化反应器研究Cr(VI)对Anammox系统性能的抑制与恢复以及颗粒污泥的特性进行了考察。以进水Cr6+浓度分别为0、1、2、mg L-1进行低浓度Cr6+连续流实验，通过监测反应器进出水三氮浓度来观察反应器脱氮性能受Cr(VI)的影响情况，从而确定连续流条件下Cr（VI）抑制剂对Anammox工艺性能的影响。结果表明，首次添加Cr6+之后会对Anammox反应器产生较大的抑制作用，当Cr6+浓度达到2 mg L-1时，反应器NRR低至1.57±0.42 kgN·m-3d-1，几乎丧失脱氮能力。经过长时间的恢复后，Anammox反应器NRR逐渐恢复至12.94±0.49 kgN·m-3d-1，甚至超过了反应器启动时的脱氮性能。再次对反应器进行长期2 mg L-1，NRR维持在12 kgN·m-3d-1试以上，说明反应器具备了一定抵御Cr(VI)抑制的能力。各阶段中Cr6+去除率随NRR同步变化。另外，对颗粒污泥特性的研究表明，添加Cr6+或显著抑制活性，但反应器会恢复与适应Cr（VI）的抑制，活性逐渐恢复，在本试验末期，活性高达210 mg N g-1VSS d-1，EPS及血红素变化相对不明显。但颗粒污泥粒径在受到Cr(VI)抑制后会迅速相应，受到抑制后颗粒颜色由血红素变成灰褐色，但最后的观察中，颗粒污泥表观特性恢复至原来水平。说明，Anammox反应器在长期受Cr(VI)状况下，通过一段时间的恢复后，能够在保持较高NRR前提下对Cr(VI)有较高的去除率。52381
Abstract Anaerobic ammonium oxidation (ANAMMOX) is a promising biological removal nitrogen removal process, The inhibition and recovery of Anammox system performance and the characteristics of granular sludge were studied by Cr(VI) in the laboratory scale anaerobic ammonium oxidation reactor. In influent concentration of Cr6+ respectively 0, 1, 2, mg L-1 for low concentration of Cr (VI) continuous flow experiments, through monitoring reactor and water nitrogen concentration to observe reactor nitrogen removal performance, the effect of Cr (VI), to determine the effect of continuous flow condition of Cr(VI) inhibitor on the Anammox process performance. The results showed that the first added Cr（VI） after the anammox reactor produced greater inhibition, when the Cr6+ concentration reached 2 mg L-1, reactor NRR low to 1.57±0.42 kg N m-3d-1, and almost lost the ability of nitrogen removal. After a long recovery, Anammox reactor NRR gradually recovered to 12.94±0.49 kg N m-3d-1, even more than the performance of denitrification reactor startup. Again the reactor for long-term 2 mg L-1, NRR maintained at 12 kg N m-3d-1 or more, It shows that the reactor has the ability to resist Cr(VI) inhibition. In each stage, the Cr6+ removal rate changed with the change of NRR. In addition, the study on the characteristics of the granular sludge showed that the Cr(VI) or significantly inhibited the activity, but the reactor could recover and adapt to the inhibition of Cr(VI), and the activity gradually recovered, At the end of the experiment, the activity was as high as 210 mg N g-1VSS d-1, and the changes of EPS and hemoglobin were not obvious. However, the particle size of the granular sludge was inhibited by Cr (VI), and then it was inhibited by the inhibition of the particle color from the heme c into the gray brown, but in the final observation, the apparent characteristics of the granular sludge recovered to the original level. Description, Anammox reactor in the long term by Cr(VI), after a period of recovery, to maintain a high NRR on the premise of Cr(VI) has a higher removal rate.
毕业论文关键词：Cr（VI）； Anammox； 活性污泥； 抑制； 恢复
Keywords: chromium(VI)；Anammox ； activated sludge； inhibition； restore
目录
摘要 2
引言 4