Acorus calamus recycled as an additional carbon source in a microbial fuel cell-constructed wetland for enhanced nitrogen removal

Tao, Mengni; Kong, Yu; Jing, Zhao; Lin, Gen‐Min; Jia, Qiusheng; Shen, Yanchang; Hu, Mingyang; Li, Yu You

doi:10.1016/j.biortech.2023.129324

Cited by 12 publications

(1 citation statement)

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“…The increase range of CW was the largest, indicating that the CW system was more dependent on carbon sources in relatively low C/N conditions. The dependence on carbon sources can be reduced by the introduction of a circuit in the MFC-CW system [26]. In the MFC system, organic matter was oxidized at the anode to generate electrons, and the microorganisms on the cathode utilized the electrons flowing from the anode to reduce nitrate and nitrite to nitrogen [27,28].…”

Section: Pollutant Removalmentioning

confidence: 99%

Effects of Carbon Source on Denitrification and Electricity Generation in Composite Packing MFC-CW for Tail Water Treatment

Kong,

Hu,

et al. 2023

Water

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The tail wastewater from sewage treatment facilities usually lacks carbon sources, and its subsequent treatment for deep nitrogen removal is difficult in natural conditions. In this study, the constructed wetland (CW) was integrated with microbial fuel cell (MFC) with high-density polyethylene (HDPE) fillers as the main matrix to improve nitrogen removal under inefficient carbon source conditions. Compared with the regular MFC and CW systems, MFC-CW attained higher nitrogen removal under low-carbon source conditions. The influence of influent carbon/nitrogen ratio (C/N) on the denitrification and electricity-generation performance was explored. Although the increase of carbon source simultaneously improved chemical oxygen demand (COD), ammonia (NH4+-N), nitrate (NO3−-N) and TN removal, the power generation during the carbon source adjustment showed low relation with the variation of influent COD in the range of 40–120 mg/L. CW was more dependent on carbon sources, and the addition of bioelectrochemical systems into MFC-CW could reduce the dependence of nitrogen removal on carbon sources, especially under low carbon source conditions. These findings offer valuable insights into the potential applications of MFC-CW for tail water treatment, and its parameters for utilization in real CWs should be explored in future studies.

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Section: Pollutant Removalmentioning

confidence: 99%