Solid slow-release carbon source assembled microbial fuel cell for promoting superior nitrogen removal in an aerobic granular sludge bioreactor
Solid slow-release carbon source assembled microbial fuel cell for promoting superior nitrogen removal in an aerobic granular sludge bioreactor
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固体缓释碳源组装微生物燃料电池用于促进好氧颗粒污泥生物反应器中的高效脱氮
DOI：
10.1016/j.jenvman.2022.116430
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发表时间：
2022
影响因子：
8.7
通讯作者：
Dong Wei
中科院分区：
文献类型：
--
作者：
Chuanfu Zhao;Yibing Wang;Shuangyu Meng;Wenhao Zhang;Xinwen Zhang;Liangguo Yan;Qin Wei;Dong Wei
微生物燃料电池（MFC）与活性污泥耦合工艺在去除有机物和回收电能方面得到了广泛应用，但由于进水碳源缺乏，出水硝酸盐含量高的问题依然存在。在好氧颗粒污泥生物反应器中构建了聚丁二酸丁二醇酯（PBS）组装MFC，以实现同时脱氮和产电。运行100 d后，AGS-MFC处理组对总无机氮（TIN）和COD的去除率分别为84.3 ± 2.6%和93.5 ± 0.5%。MFC模块的平均输出电压和最大功率密度分别为223.7 mV和59.6 mW/m2。通过高通量测序分析，在两个生物反应器中，Thauera相关的微生物丰度最高（20.0%和31.4%）。亚硝化单胞菌相关的氨氧化细菌（AOB）在AGS-MFC中的相对丰度（1.8%）高于AGS-Control（1.1%）。在MFC模块中，在PBS增强下，具有反硝化和发电的Thauera（16.2%）在阳极生物膜中占主导地位。该研究为潜水式MFC在好氧条件下强化深度脱氮的应用提供了科学依据。
Although the coupling process of microbial fuel cell (MFC) and activated sludge is widely used for organic matter removal and electric energy recovery, the problem of high effluent nitrate still exists due to the lack of influent carbon source. Herein, a poly (butanediol succinate) (PBS) assembled MFC was established in an aerobic granular sludge (AGS) bioreactor for simultaneous promoting nitrogen removal and electricity generation. Compared to AGS-Control group, the total inorganic nitrogen (TIN) and COD removal efficiencies of AGS-MFC group were improved to 84.3 ± 2.6% and 93.5 ± 0.5% after 100-days operation. The average output voltage and the maximum power density of the MFC module were 223.7 mV and 59.6 mW/m2, respectively. Through high-throughput sequencing analysis,Thauera-related denitrifying bacteria had the highest relative abundances (20.0% and 31.4%) in both bioreactors. The relative abundance ofNitrosomonas-related ammonia oxidizing bacteria (AOB) in AGS-MFC (1.8%) was enriched than AGS-Control (1.1%). In MFC module,Thauera(16.2%) with denitrification and power generation was dominant in anodic biofilms under PBS enhancement. This study provides scientific basis for the application of submersible MFC enhanced deep nitrogen removal under aerobic conditions.