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Isolation of a heterotrophic nitrification-aerobic denitrification strain and identification of its potential electricity generation ability in microbial fuel cells
Environmental Technology ( IF 2.8 ) Pub Date : 2021-08-14 , DOI: 10.1080/09593330.2021.1964001
Siru Song 1 , Mingchuan Zhang 1 , Xinyang Xu 1
Affiliation  

ABSTRACT

To construct a simultaneous nitrification and denitrification-microbial fuel cell (SND-MFC) reactor for stable electricity generation, a heterotrophic nitrification-aerobic denitrification strain was isolated and purified from aerobic activated sludge from a sewage treatment plant. The strain with an optimal nitrogen removal performance, which was identified as Pseudomonas, was inoculated into the SND-MFC as a single strain. Different electrode materials and electrode distances (EDs) were investigated. The results showed that a maximum ammonium removal rate of 92.31% and a maximum power density of 134.28 mW/m3 were obtained by the SND-MFC using graphene film as the electrodes material. Decreasing the ED did not significantly improved the power generation performance of the pure strain SND-MFC at the initial stage. When the electrode distance of the SND-MFC was 4 cm, the best generation efficiency was achieved with a maximum power density of 151.84 mW/m3.



中文翻译:

一株异养硝化-好氧反硝化菌株的分离及其在微生物燃料电池中潜在发电能力的鉴定

摘要

为了构建稳定发电的同时硝化反硝化-微生物燃料电池 (SND-MFC) 反应器,从污水处理厂的好氧活性污泥中分离纯化了一株异养硝化-好氧反硝化菌株。将具有最佳脱氮性能的菌株(鉴定为假单胞菌)作为单一菌株接种到SND-MFC中。研究了不同的电极材料和电极距离 (ED)。结果表明,最大氨氮去除率为92.31%,最大功率密度为134.28 mW/m 3使用石墨烯薄膜作为电极材料通过SND-MFC获得。降低ED并没有显着提高纯菌株SND-MFC在初始阶段的发电性能。当SND-MFC的电极间距为4 cm时,发电效率最高,最大功率密度为151.84 mW/m 3

更新日期:2021-08-14
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