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Membrane penetration of nitrogen and its effects on nitrogen removal in dual-chambered microbial fuel cells
Jin, Xiaojun1; Yang, Nuan2; Liu, Hong1; Wang, Sha1
2022-06-01
摘要Owing to membrane penetration, a novel route of nitrogen removal was proposed in a dual-chamber microbial fuel cell with a proton exchange membrane (PEM). The results showed that NH4+-N rapidly migrated across PEM with a mass transfer coefficient (KA) of 1.79 +/- 0.51 x 10(-1)cm s(-1), 50% of which was oxidized to NO3 -N in the cathode chamber, then the remainder being eliminated by short-cut nitrification/denitrification. Meanwhile, NO3 -N went across the PEM again with a low KA of 5.50 +/- 0.24 x 10(-6) cm s(-1), and was subsequently reduced via anodic denitrification. In the anode, the functional microorganisms were divided into exoelectrogenic bacteria (46.2%) and denitrifying bacteria (37.3%), while the dominated bacteria were mainly affiliated with nitrifying bacteria (19.6%) and aerobic denitrifying bacteria (52.9%) in the cathode. These findings provide a new insight into nitrogen removal during bioelectrochemical treatment of actual wastewater. [GRSPHICS].
关键词Membrane penetration Microbial fuel cells Nitrogen conversion Biocathode Microbial community
DOI10.1016/j.chemosphere.2022.134038
发表期刊CHEMOSPHERE
ISSN0045-6535
卷号297页码:8
通讯作者Wang, Sha(wangsha@cigit.ac.cn)
收录类别SCI
WOS记录号WOS:000911815200001
语种英语