微生物燃料电池
化学需氧量
化学
催化作用
废水
阴极
法拉第效率
化学工程
制浆造纸工业
环境化学
阳极
有机化学
环境工程
电极
环境科学
物理化学
工程类
作者
Huayun Zhu,Zhang Zhi,Yingying Zhou,Jiang Xu,Fangfang Cai,Yun Bai,Haoming Ning
标识
DOI:10.1016/j.jwpe.2021.102471
摘要
The rapid increase of swine wastewater (SW) has posed great threat to the environment and traditional processes also suffered from a high operational cost. In this study, porous Co, N co-doped carbon derived from tea residue was synthesized through a green, low-cost method combining the NaCl/KCl eutectic salt and a little KOH as activator at different temperature for microbial fuel cells to treat the SW. The catalyst prepared at 700 °C (TC-700) displayed high specific surface area (1009.5 m2/g) and appropriate porous structure, high Co-Nx and pyridinic-N content, which endowed it with good oxygen reduction reaction activity. When used in the MFC to treat SW, a higher maximum power density (748.9 mW/m2) and maximum output voltage (0.529 V) was obtained with better stability, compared to the Pt/C cathode MFC (588.7 mW/m2 and 0.513 V). Besides, it can also achieve high coulombic efficiency of 6.18 ± 0.38%, chemical oxygen demand removal of 81.8 ± 1.86%, and ammonia removal of 35.0 ± 2.0%, total nitrogen removal of 33.5 ± 2.4%. Microbial community analysis revealed the functional bacteria for electricity generation and pollutant removal. This work demonstrated the feasibility of development on MFC cathode catalysts and its application in SW treatment.
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