Sediment microbial fuel cell (SMFC) is a promising bioremediation technology in which microbes play an important role. Electricigens as the bio-catalysts have effect on pollution control and electricity generation. It is of great significance to screen the microorganisms with the ability of generating electricity. The SMFC anode biofilm was used as microbiological source to study the feasibility of electricigens with iron-reducing property for eutrophication water treatment. Preliminarily, we isolated 20 facultative anaerobic pure bacteria and evaluated their cyclic voltammogram (CV) through the three-electrode system and electrochemical workstation. The power generation performance of strains was verified by air-cathode microbial fuel cells (AC-MFCs) under different single carbon sources. According to its morphological, physiological, and biochemical characteristics, along with phylogenetic analysis, the two strains (SMFC-7 and SMFC-17) with electrical characteristics were identified as Bacillus cereus. Compared with SMFC-7, SMFC-17 exhibited efficient NH4+-N and NO3−-N removal and PO43−-P accumulation from eutrophic solution with a removal rate of 79.91 ± 6.34% and 81.26 ± 1.11% and accumulation rate of 57.68 ± 4.36%, respectively. The isolated bacteria SMFC-17 showed a good performance in eutrophic solution, and it might be a useful biocatalyst to enable the industrialized application of SMFC in eutrophic water treatment.

中文翻译：

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两种还原铁兼性厌氧性电器的分离及在富营养化水中的应用性能探讨

沉积物微生物燃料电池（SMFC）是一种有前途的生物修复技术，其中微生物起着重要的作用。作为生物催化剂的电气化剂对污染控制和发电具有影响。筛选具有发电能力的微生物具有重要意义。以SMFC阳极生物膜为微生物源，研究了具有还原铁性能的电化子用于富营养化水处理的可行性。初步，我们分离出20个兼性厌氧纯细菌，并通过三电极系统和电化学工作站评估了它们的循环伏安图（CV）。通过空气阴极微生物燃料电池（AC-MFCs）在不同单一碳源下验证了菌株的发电性能。根据其形态，生理，并通过系统进化分析，鉴定出两个具有电特性的菌株（SMFC-7和SMFC-17）为蜡状芽孢杆菌。与SMFC-7相比，SMFC-17表现出从富营养液中高效去除NH4 + -N和NO3--N和PO43--P的累积，去除率分别为79.91±6.34％和81.26±1.11％，累积率为57.68±4.36 ％， 分别。分离出的细菌SMFC-17在富营养化溶液中表现出良好的性能，它可能是使SMFC在富营养化水处理中工业化应用的有用的生物催化剂。SMFC-17表现出从富营养液中有效去除NH4 + -N和NO3--N和PO43-P的累积率，去除率分别为79.91±6.34％和81.26±1.11％，累积率分别为57.68±4.36％。分离出的细菌SMFC-17在富营养溶液中表现出良好的性能，它可能是使SMFC在富营养水处理中工业化应用的有用的生物催化剂。SMFC-17表现出从富营养液中有效去除NH4 + -N和NO3--N和PO43-P的累积率，去除率分别为79.91±6.34％和81.26±1.11％，累积率分别为57.68±4.36％。分离出的细菌SMFC-17在富营养化溶液中表现出良好的性能，它可能是使SMFC在富营养化水处理中工业化应用的有用的生物催化剂。