A novel partial-denitrification strategy for post-anammox to effectively remove nitrogen from landfill leachate
A novel partial-denitrification strategy for post-anammox to effectively remove nitrogen from landfill leachate
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一种新型的厌氧氨氧化后部分反硝化策略，有效去除垃圾渗滤液中的氮
DOI：
10.1016/j.scitotenv.2018.03.213
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发表时间：
2018
影响因子：
9.8
通讯作者：
Yongzhen Peng
中科院分区：
文献类型：
--
作者：
Lina Wu（吴莉娜）;Zhi Li;Chen Zhao;Dawei Liang;Yongzhen Peng
厌氧氨氧化 (anammox) 在垃圾渗滤液等低 C/N 废水中的脱氮方面显示出巨大的前景。然而，按化学计量产生了 11% 的 NO3−-N，这降低了总氮 (TN) 的去除效率。在这项研究中，开发了一种厌氧氨氧化后策略，以有效去除渗滤液中的总氮。通过补充电子供体缺乏条件，为随后的厌氧氨氧化提供底物，完成NO3−-N到NO2−-N的串联转化（部分反硝化）。该工艺大大提高了渗滤液中NH4+-N和TN的去除率，效率达到95%。实时定量聚合酶链式反应结果表明，厌氧氨氧化菌富集量较高，滴度达到10 9 拷贝数/L，占细菌群落总数的9.66%，表明这种新策略去除渗滤液TN的效果是成功的。
Anaerobic ammonia oxidation (anammox) has shown great promise for nitrogen removal in low C/N wastewater such as landfill leachate. However, 11% of NO3−-N is stoichiometrically produced, which decreases the total nitrogen (TN) removal efficiency. In this study, a strategy for post anammox was developed to effectively remove TN from leachate. A tandem conversion of NO3−-N to NO2−-N (partial denitrification) was accomplished by supplying substrate for subsequent anammox, by supplementing the electron donor deficient condition. This process greatly improved NH4+-N and TN removal from leachate, reaching a 95% efficiency. Quantitative real-time polymerase chain reaction results showed that a high abundance of anammox bacteria, with a titer of 10 9 copy numbers/L, was enriched, accounting for 9.66% of the total bacterial community, and indicating the success of this.novel strategy for the TN removal in leachate.