Anaerobic granular sludge coupled with artificial aeration or Fe-based substrate enhanced nitrogen conversion dynamic based on CW-MFCs
Anaerobic granular sludge coupled with artificial aeration or Fe-based substrate enhanced nitrogen conversion dynamic based on CW-MFCs
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基于 CW-MFC 的厌氧颗粒污泥与人工曝气或铁基基质增强氮转化动态
DOI：
10.1016/j.jwpe.2021.102483
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发表时间：
2022-02
影响因子：
7
通讯作者：
Song Xin-Shan
中科院分区：
文献类型：
--
作者：
Wang Jun-Feng;Zhu Cong-Yun;Li Qu-Sheng;Yan Deng-Ming;Wang Li-Li;He Tao;Cai Ze-Xiang;Zhou Huan-Zhan;Song Xin-Shan
氮转化，例如氨化、硝化和反硝化作用，人工湿地（CW）的效率由于其配置缺陷而受到微生物量、电子受体和补充电子传递途径缺乏的限制。高密度污泥接种、电子受体富集和电子传递强化可以分别提高CW中不同氮形态的转化效率。因此，探索了三种方法，包括基于CW-微生物燃料电池（CW-MFC）的厌氧颗粒污泥（AGS）与人工曝气（R1）或富铁底物（R2：Fe-C；R3：Fe单键S）相结合来增强氮转化动态。结果表明，三个反应器的氨化效率、硝化效率和反硝化效率（Org-N负载率：2.1–4.4 g N/(m2·d)）分别达到89%、34–80%和90%。醋酸分解产甲烷菌（Methanosaeta）和产酸细菌（毛球菌）的相互作用在 Org-N 转化为 NH3-N 的过程中发挥着重要作用。典型的发电细菌，如木球菌、梭状芽胞杆菌、红细菌和地杆菌等，在阳极区富集，特别是R2-3，在NH3-N转化为NO2-N和NO3-N的过程中，有利于Feamox过程。稳定的生物能输出可以作为电化学反硝化的补充，从而在CW中诱导近乎完全的反硝化。此外，在有机负荷率为 36–78 g COD/(m2·d) 的情况下，与 AGS 结合的 CW-MFC 表现出良好的有机降解效率 (68–90%)。这些发现表明，AGS 与人工曝气或铁基基质相结合是促进氮转化动态并实现基于 CW-MFC 的可持续含氮废水处理的有前途的技术。
Nitrogen conversion, e.g. ammonification, nitrification, and denitrification, efficiency in constructed wetlands (CWs) was constrained by the lack of microbial biomass, electron acceptor, and supplemental electron transfer pathway due to its configuration defects. High density sludge inoculation, electron acceptor enrichment, and electron transfer intensification can respectively enhance the conversion efficiencies of different nitrogen forms in CWs. Thus, three approaches including anaerobic granular sludge (AGS) coupled with artificial aeration (R1) or Fe rich substrates (R2: Fe-C; R3: Fesingle bondS) based on CW-microbial fuel cells (CW-MFCs) were explored to enhance nitrogen conversion dynamic. Results showed that the ammonification, nitrification, and denitrification efficiencies (Org-N loading rates: 2.1–4.4 g N/(m2·d)) of three reactors could reach 89%, 34–80%, and 90%, respectively. Interactions of acetoclastic methanogens (Methanosaeta) and acid-producing bacteria (Trichococcus) play an important role in the conversion of Org-N to NH3-N. Typical electricity-generating bacteria, such asTrichococcus,Clostridium,Rhodobacter, andGeobacter, enriched in anodic zone, especially for R2–3, which availed for Feammox process during the conversion of NH3-N to NO2-N and NO3-N. Stable bioenergy output could act as a supplementary for electrochemical denitrification, inducing an approximately complete denitrification in CWs. In addition, CW-MFC associated with AGS exhibit a favorable organic degradation efficiency (68–90%) under the organic loading rates of 36–78 g COD/(m2·d). These findings indicated that AGS coupled with artificial aeration or Fe-based substrates are promising technologies for promoting nitrogen conversion dynamic and achieving sustainably nitrogenous wastewater treatment based on CW-MFCs.
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影响因子：
3.8
作者：
Ting Xie;Zhaoqian Jing;Jing Hu;Pengyi Yuan;L. Yali;Shiwei Cao
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影响因子：
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作者：
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影响因子：
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作者：
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影响因子：
11
作者：
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影响因子：
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