National Engineering Laboratory for Advanced Municipal Wastewater Treatment and Reuse Technology, Engineering Research Center of Beijing, Beijing University of Technology, Beijing 100124, PR China.
State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, Harbin 150090, PR China; Engineering Technology Research Center of Beijing MSW Comprehensive Treatment and Utilization, Environmental Engineering Technology Co, Ltd., Beijing, PR China.
Bioresour Technol. 2021 Aug;333:125138. doi: 10.1016/j.biortech.2021.125138. Epub 2021 Apr 8.
A novel combined partial nitrification-Anammox and partial denitrification-Anammox (PnA/PdA) single sequencing batch biofilm reactor (SBBR) was established to realize efficient and advanced nitrogen removal from mature landfill leachate with low biodegradability. Nitrogen removal rate and nitrogen removal efficiency were increased to 2.83 ± 0.06 kgN/(m∙d) and 98.6 ± 0.2% by stepwise increase of dissolved oxygen (DO, from 0.5 to 3.5 mg/L) and continuous carbon source feeding. Comparable activities of ammonia oxidation bacteria and Anammox bacteria were realized during aerobic period. More organic carbon was redirected from complete denitrification to partial denitrification during anoxic period. The main pathway PnA jointly synergized with PdA, which contributed to 76.04% and 19.44% nitrogen removal, respectively. Nitrosomonas, Thauera, and Kuenenia dominated in floc sludge (0.78%, 5.38%, and 1.14%, respectively) and biofilm (0.34%, 5.18%, and 0.98%, respectively). Overall, this study provides new insight into the high-efficiency treatment of landfill leachate at full-scale landfill sites.
建立了一种新型的组合部分硝化-厌氧氨氧化和部分反硝化-厌氧氨氧化（PnA/PdA）单序批式生物膜反应器（SBBR），以实现从生物降解性低的成熟垃圾渗滤液中高效、深度脱氮。通过逐步提高溶解氧（DO，从 0.5 增加到 3.5 mg/L）和连续投加碳源，氮去除率和氮去除效率分别提高到 2.83±0.06 kgN/(m·d)和 98.6±0.2%。在好氧期实现了氨氧化菌和厌氧氨氧化菌的可比活性。在缺氧期，更多的有机碳从完全反硝化转向部分反硝化。PnA 与 PdA 联合协同作用，分别贡献了 76.04%和 19.44%的氮去除。在絮体污泥（分别为 0.78%、5.38%和 1.14%）和生物膜（分别为 0.34%、5.18%和 0.98%）中，硝化菌、陶厄氏菌和Kunenia 占主导地位。总的来说，本研究为在大型垃圾填埋场中高效处理垃圾渗滤液提供了新的思路。
