序批式反应器中新型同步短程硝化反硝化厌氧氨氧化（SPNDA）工艺用于从铵盐和硝酸盐废水中深度脱氮。
A novel simultaneous partial nitritation, denitratation and anammox (SPNDA) process in sequencing batch reactor for advanced nitrogen removal from ammonium and nitrate wastewater.
机构信息
Environmental Microbiome and Biotechnology Lab, School of Ecological and Environmental Sciences, East China Normal University, Shanghai 200241, China.
National and Local Joint Engineering Laboratory of Municipal Sewage Resource Utilization Technology, School of Environmental Science and Engineering, Suzhou University of Science and Technology, Suzhou 215009, China.
出版信息
Bioresour Technol. 2022 Jan;343:126105. doi: 10.1016/j.biortech.2021.126105. Epub 2021 Oct 22.
This study presented a novel simultaneous partial nitritation (PN), denitratation and anammox (SPNDA) process for treating ammonium and nitrate wastewater. Results indicated that SPNDA could achieve a great total nitrogen (TN) removal of 97.6 ± 0.5%, leading to effluent TN concentration of only 3.4 mg/L. Mass balance indicated that nitrogen removal rates via anammox, simultaneous nitrification and denitrification were 96.7% and 3.3%, respectively. Extended aerobic duration (12 h) and low dissolved oxygen (DO) concentration (0.15 mg/L) could improve ammonia-oxidizing bacteria (AOB) activity and maintain PN stability. The stable suppression of nitrite-oxidizing bacteria activity was attributed to the low DO (0.15 mg/L) and high free ammonia (3.63 mg/L) in SPND. Besides, the nitrogen conversion mechanisms for SPNDA were revealed based on a typical operational cycle. Microbial analysis showed that AOB (Nitrosomonas) and partial denitrifying bacteria (Thauera and Denitratisoma) coexisted with anammox bacteria (Candidatus Brocadia and Candidatus Anammoxoglobus) in the mixotrophic bio-community.
本研究提出了一种新型的同时部分亚硝化（PN）、反硝化和厌氧氨氧化（SPNDA）工艺，用于处理氨氮和硝酸盐废水。结果表明，SPNDA 可以实现高达 97.6±0.5%的总氮（TN）去除率，导致出水 TN 浓度仅为 3.4mg/L。质量平衡表明，通过厌氧氨氧化、同步硝化反硝化的氮去除率分别为 96.7%和 3.3%。延长好氧时间（12 小时）和低溶解氧（DO）浓度（0.15mg/L）可以提高氨氧化菌（AOB）的活性并维持 PN 的稳定性。在 SPND 中低 DO（0.15mg/L）和高游离氨（3.63mg/L）稳定抑制了亚硝酸盐氧化菌的活性。此外，根据典型的运行周期揭示了 SPNDA 的氮转化机制。微生物分析表明，AOB（亚硝化单胞菌）和部分反硝化菌（陶厄氏菌和脱氮硫杆菌）与厌氧氨氧化菌（Candidatus Brocadia 和 Candidatus Anammoxoglobus）共存于混合营养生物群落中。
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