This study reports on the investigation of the digestate treatment using microbial fuel cell (MFC) technology. The effluents from a thermophilic and a mesophilic anaerobic digester, fed with fermentable household food waste (FORBI), were characterized and used as the feed in four air–cathode MFC units. The chemical oxygen demand (COD) removal ranged from 80% to 90% and was achieved within the first 24 h to 48 h of each cycle operation, although electricity was still produced for more than 190 h. The electrochemical characterization of the cells showed low internal resistances (10–50 Ω) of the units for both inlets. The maximum power output of the mesophilic fed cells (~ 0.24 mW) is lower in comparison with the respective power achieved from the thermophilic fed cells (~ 0.42 mW). The work demonstrated the potential of using MFC technology to further treat and exploit anaerobic digestates which are produced from FORBI.

Graphical Abstract

中文翻译：

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利用MFC技术开发食用发酵废渣制成的嗜热和中温厌氧消化池中的消化液。

这项研究报告了使用微生物燃料电池（MFC）技术进行消化处理的研究。对来自嗜热和中温厌氧消化池的废水进行了发酵，并掺入了可发酵的家庭食物垃圾（FORBI），并将其用作四个空气阴极MFC单元的进料。化学需氧量（COD）的去除范围为80％至90％，尽管每次发电仍超过190小时，但在每个循环操作的前24小时至48小时内即可达到。电池的电化学特性显示，两个进样口的组件内部电阻低（10–50Ω）。与嗜温细胞相比，嗜温细胞的最大功率输出（〜0.24 mW）要低。

图形概要