高级检索

    回流比对短程硝化-厌氧氨氧化组合工艺处理晚期垃圾渗滤液自养脱氮的影响

    Effect of Recycling Ratio on the Combined Process of Nitritation-ANAMMOX for the Autotrophic Nitrogen Removal of Mature Landfill Leachate

      摘要
    • 摘要: 采用“连续流短程硝化-厌氧氨氧化组合工艺”处理低碳氮比高氨氮浓度的晚期垃圾渗滤液.主要考察了在不同外回流比（100%~600%）的条件下，A/O反应器中氨氮转化率以及亚硝酸盐积累率的变化，游离氨（free ammonia，FA）与游离亚硝酸（free nitrite acid，FNA）的平均质量浓度变化；UASB反应器的厌氧氨氧化活性及其在相同高度（10 cm）处的粒径变化情况.试验结果表明，当回流比维持在300%时，A/O反应器中的亚硝酸盐氧化细菌（nitrite oxidizing bacteria，NOB）被FA和FNA联合抑制，进而达到了较好的短程硝化效果，A/O反应器中氨氮转化率、亚硝酸盐积累率分别达到93.5%、95.6%以上，UASB厌氧氨氧化反应器污泥持留性与活性均达到较高的水平，总氮去除负荷达到1.04 kg/（m3·d）以上.定量PCR结果表明，厌氧氨氧化菌占全菌的比例达到了试验期间的最大值3.78%.

       

      Abstract: A combined continuous-flow process of A/OSHORTCUT-UASBANAMMOX was applied to treat mature leachate which contained high concentration of ammonia and low COD/nitrogen rate.The conversion rate of ammonia, nitrite accumulation ratio and the variation of FA and FNA concentrations in A/O reactor, the nitrogen removal activity of ANAMMOX and the variation of granules sizes at the same height (10 cm) were investigated at different recycling ratios (100%-600%). The results indicated that when the recycling ratio came to 300%, with the help of associated inhibition of FA and FNA to NOB, the conversion rate of ammonia and nitrite accumulation ratio in A/O reactor were kept above 93.5% and 95.6%, respectively. In addition, the ANAMMOX granules were well retained in the UASB reactor and kept a high level of total nitrogen removal rate. The nitrogen removal rate of UASB reactor kept above 1.04 kg/(m3·d). Also, the results of quantitative PCR(polymerase chain reaction) indicated that the proportions ofANAMMOXin UASB reactor were 3.78% which was the maximum value of the whole experiment.

       

      • HTML全文
      • 参考文献(28)
      • 相关文章
      • 施引文献
    • 资源附件(0)

    /

    返回文章
    返回