Liu Feng, Sun Lei, Wan Jinbao, Tang Aiping, Deng Mi, Wu Rongwei
School of Resources Environmental & Chemical Engineering, Nanchang University Nanchang 330031 China
School of Chemistry and Chemical Engineering, Jiangxi Science and Technology Normal University Fenglin Street Nanchang Jiangxi 330013 China.
RSC Adv. 2019 Feb 12;9(10):5384-5393. doi: 10.1039/c8ra10625h. eCollection 2019 Feb 11.
A novel approach, combining a microbial fuel cell (MFC) with an integrated vertical flow constructed wetland (IVCW), was developed, and its ability to simultaneously produce electrical energy while treating swine wastewater was verified. The system combined the singular water flow path of a traditional vertical flow constructed wetland (upflow and downflow)-microbial fuel cell (CW-MFC), which demonstrates better characteristics in the aerobic, anoxic, and anaerobic regions. It not only enhanced the anti-pollution load ability and the organic compound removal effect, but also improved the gradient difference in the redox potential of the system. The results showed that the structure and substrate distribution in the device could both improve swine wastewater treatment and increase bioelectricity generation capabilities. The average chemical oxygen demand (COD) and ammonia nitrogen (NH -N) removal efficiencies were as high as 79.65% and 77.5%, respectively. Long-term and stable bioelectricity generation was achieved under continuous flow conditions. The peak values of the output voltage and power density were 713 mV and 456 mW m. The activated carbon layer at the bottom of this system provided a larger surface for the growth of microbes. It showed significant promotion of the relative abundance of electrochemically active bacteria, which might result in the increase of bioelectricity generation in integrated vertical flow constructed wetland-microbial fuel cells (IVCW-MFCs). The electrochemically active bacteria, and , were detected in the anodic biofilm by high-throughput sequencing analysis.
开发了一种将微生物燃料电池（MFC）与一体化垂直流人工湿地（IVCW）相结合的新方法，并验证了其在处理猪废水的同时产生电能的能力。该系统结合了传统垂直流人工湿地（上流和下流）-微生物燃料电池（CW-MFC）的单一水流路径，在好氧、缺氧和厌氧区域表现出更好的特性。它不仅提高了抗污染负荷能力和有机化合物去除效果，还改善了系统氧化还原电位的梯度差异。结果表明，装置中的结构和基质分布既能改善猪废水处理效果，又能提高生物发电能力。化学需氧量（COD）和氨氮（NH -N）的平均去除效率分别高达79.65%和77.5%。在连续流条件下实现了长期稳定的生物发电。输出电压和功率密度的峰值分别为713 mV和456 mW m。该系统底部的活性炭层为微生物生长提供了更大的表面。它对电化学活性细菌的相对丰度有显著促进作用，这可能导致一体化垂直流人工湿地-微生物燃料电池（IVCW-MFC）中生物发电量的增加。通过高通量测序分析在阳极生物膜中检测到了电化学活性细菌 和 。
