| 高氮渗滤液短程深度脱氮及反硝化动力学 |
| 摘要点击 3465 全文点击 2588 投稿时间：2009-02-28 修订日期：2009-05-04 |
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| 中文关键词 垃圾渗滤液 单级UASB-SBR 深度脱氮 短程硝化 动力学 |
| 英文关键词 landfill leachate first-stage UASB-SBR advanced nitrogen removal partial nitrification kinetic |
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| 中文摘要 |
| 采用单级UASB-SBR生化系统处理实际高氮晚期渗滤液,重点研究了系统的有机物和氮去除特性,同时考察了SBR短程生物脱氮系统内微生物的反硝化动力学特性.试验结果表明,该生化系统能够高效、深度去除渗滤液内高浓度有机物和氮.UASB反应器的平均COD负荷为6.5 kg/(m3·d),去除速率为5.3 kg/(m3·d).在进水COD平均为6 537 mg·L-1,NH＋4-N为2 021 mg·L-1的条件下,出水分别为354 mg·L-1和2.8 mg·L-1以下,去除率分别为94.6%和99.8%,尤其是该系统获得了99.2%的TN去除率,出水TN<20 mg·L-1,实现了深度脱氮的目的.SBR反应器实现并维持了稳定的短程硝化,通过90%以上的亚硝化率实现高效的氨氮去除,同时SBR系统内微生物的反硝化特性符合Monod动力学方程. |
| 英文摘要 |
| The treatment of real leachate from municipal landfill with high ammonia nitrogen (NH+4-N) content was investigated by using lab-scale first-stage up-flow anaerobic sludge bed (UASB)-SBR biological system. The denitritation kinetics characteristics of microbial population in the SBR reactor was also studied. Experimental results clearly showed that the average organic loading rate of UASB reactor reached 6.5 kg/(m3·d), the average organic removal rate was 5.3 kg/(m3·d). High concentrations of COD and nitrogen contained in landfill leachate were removed efficiently, average COD and NH+4-N of influent could be reduced from 6 537 mg·L-1and 2 021 mg·L-1 to 354 mg·L-1 and 2.8 mg·L-1, respectively, the removal efficiencies reached 94.6% and 99.8%, respectively. Especially, above 99.2% removal efficiency of TN was obtained, and effluent TN concentration below 20 mg·L-1,so advanced nitrogen removal was achieved in the biological system. Ammonia nitrogen was removed by high effective partial nitrification with above 90% nitrite accumulation ratio, and the denitritation kinetics characteristics of the microbial population was fit well for Monod Equation. |
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