Low energy treatment of landfill leachate using simultaneous partial nitrification and partial denitrification with anaerobic ammonia oxidation
Low energy treatment of landfill leachate using simultaneous partial nitrification and partial denitrification with anaerobic ammonia oxidation
复制标题
厌氧氨氧化同步部分硝化、部分反硝化低能处理垃圾渗滤液
DOI：
10.1016/j.envint.2019.02.071
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发表时间：
2019
影响因子：
11.8
通讯作者：
Yongzhen Peng
中科院分区：
文献类型：
--
作者：
Lina Wu（吴莉娜）;Zhi Li;Shan Huang;Mingyu Shen;Zhibin Yan;Jin Li;Yongzhen Peng
An up-flow anaerobic sludge blanket reactor (UASB), anoxic/oxic (A/O)–anaerobic ammonia oxidation reactor (ANAOR or anammox reactor), and anaerobic sequencing batch reactor (ASBR) were employed in the treatment of landfill leachate with partial nitrification-anammox and half-denitrification-anammox. The Chemical Oxygen Demand (COD) concentration, ammonium nitrogen (NH4+-N) concentration, and total nitrogen (TN) concentration of the basal leachate was 2200–2500 mg/L, 1200–1300 mg/L, and 1300–1400 mg/L, respectively. After a 1:2 dilution using domestic sewage, the COD, NH4+-N, and TN concentrations in the influent were 800–1000 mg/L, 400–430 mg/L, and 420–440 mg/L, respectively. After treatment, the final COD, NH4+-N, and TN were decreased to 90–100 mg/L, 13–14 mg/L, and 35–38 mg/L, respectively. In the ASBR, organic carbon.sources in sewage-diluted landfill leachate were introduced for the conversion of nitrate nitrogen (NO3−-N) into nitrite nitrogen (NO2−-N). This enabled the continued reaction of NO2−-N with NH4+-N from the newly introduced sewage-diluted landfill leachate via anammox. As a result, complete TN removal was achieved in the system. Microbial diversity analysis indicated that the relative abundance of ammonia-oxidizing bacteria (AOB) was four to five times greater than nitrite-oxidizing bacteria (NOB) in the A/O reactor, showing that partial nitrification was prevalent. The relative abundance of the anammox bacterium Candidatus Kuenenia gradually increased in each reactor, reaching a maximum of 1.17%–1.39%. Using this set-up, we achieved advanced, efficient, and economical, COD reduction and nitrogen removal. Taken together, the findings provide important insights into the optimal operation of landfill leachate treatments.
