Using Partial Nitrification and Anammox To Remove Nitrogen from Low-Strength Wastewater by Co-immobilizing Biofilm inside a Moving Bed Bioreactor
Using Partial Nitrification and Anammox To Remove Nitrogen from Low-Strength Wastewater by Co-immobilizing Biofilm inside a Moving Bed Bioreactor
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DOI：
10.1021/acssuschemeng.8b05055
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发表时间：
2018-12
影响因子：
8.4
通讯作者：
Rong-zhong Chen;Yasuyuki Takemura;Yuan Liu;Jiayuan Ji;S. Sakuma;K. Kubota;Haiyuan Ma;Y. Li
中科院分区：
文献类型：
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作者：
Rong-zhong Chen;Yasuyuki Takemura;Yuan Liu;Jiayuan Ji;S. Sakuma;K. Kubota;Haiyuan Ma;Y. Li
部分硝化-厌氧氨氧化（PNA）工艺的稳定运行是污水主流等极低强度氨废水脱氮的挑战。研制了功能载体移动床反应器（30%填充率），用于处理氨浓度为50 mg/L的合成进水。长期运行结果表明，在相对较短的水力停留时间（2 h）下，反应器的氮去除率稳定在71.7±9.1%。微生物分析显示厌氧氨氧化菌和氨氧化菌（AOB）丰度分别为29.7%和6.32%，是反应器中最具优势的两种细菌。载体将生长缓慢的厌氧氨氧化菌大量保留在其中空空间内，形成厌氧氨氧化菌与AOB共固定化的三明治状生物膜结构。载体生物膜的厌氧氨氧化活性远高于悬浮絮凝体，而AOB活性则相反。相应地，荧光原位杂交分析…
The stable operation of partial nitrification and anammox (PNA) process is a challenge in nitrogen removal from extremely low-strength ammonia wastewater like sewage mainstream. A moving bed reactor with functional carriers (30% filling rate) was developed to treat a synthetic influent with 50 mg/L ammonia. The long-term operation results showed nitrogen removal efficiencies of 71.7 ± 9.1% have been stably obtained under a relatively short hydraulic retention time of 2 h. Microbial analysis revealed anammox bacteria and ammonium oxidizing bacteria (AOB) with 29.7% and 6.32% abundance were the two most dominant bacteria in the reactor. Carriers largely retained slow-growing anammox bacteria in their hollow space and established a sandwich-like biofilm structure of co-immobilization of anammox bacteria and AOB. The anammox activity was much higher in carrier biofilms than in suspended flocs, while, for the AOB activity, the situation was reversed. Correspondingly, a fluorescent in situ hybridization analysi...