Effects of activated carbon-polytetrafluoroethylene electrodes on NH4+-N removal in bioelectrochemical system

doi:10.14088/j.cnki.issn0439-8114.2020.21.016

Abstract

Abstract: Carbon black and polytetrafluoroethylene （PTFE）were flat-pressed to fabricate the activated carbon （AC）-polytetrafluoroethylene electrodes. These AC-based electrodes were applied in a single-chamber BES to achieve autotrophic NH₄⁺-N removal under organic carbon-free conditions. The results showed that NH₄⁺-N removal effect could be enhanced by applying voltage to the BES, in which case the NH₄⁺-N removal efficiency gradually increased as the applied voltage increased from 0.10 V to 0.25 V. The average NH₄⁺-N removal rate in a BES was 47.8 mg/（L·d）. Cyclic voltammetry results revealed the presence of several redox-active components on the anode and cathode surfaces, indicating that the AC-based bioanode and biocathode had good electroactivities. Microbial community analysis of 16S rRNA genes based on high-through put sequencing indicated that the diversity of the microbial community increased after electric power application, and Pseudomonas and Paracoccus could be important for nitrogen-compound removal in the BES.

Key words: activated carbon, bioelectrochemical system （BES）, biofilm, NH₄⁺-N removal

CLC Number:

WANG Rui, ZHANG Dong-dong, GUO Peng, WANG Yi, ZHANG Chun-fang, CHEN Lei. Effects of activated carbon-polytetrafluoroethylene electrodes on NH₄⁺-N removal in bioelectrochemical system[J]. HUBEI AGRICULTURAL SCIENCES, 2020, 59(21): 81-87.

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Effects of activated carbon-polytetrafluoroethylene electrodes on NH₄⁺-N removal in bioelectrochemical system

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