Ishaq Aliyu, Said Mohd Ismid Mohd, Azman Shamila Binti, Houmsi Mohammed Rajab, Isah Abubakar Sadiq, Jagun Zainab Toyin, Mohammad Shamsuddeen Jumande, Bello Al Amin Danladi, Abubakar Umar Alfa
Department of Water & Environmental Engineering, School of Civil Engineering, Faculty of Engineering, Universiti Teknologi Malaysia, 81300, Bahru, Johor, Malaysia.
Department of Water Resources and Environmental Engineering, Ahmadu Bello University, Kaduna, 1045, Zaria, Nigeria.
Environ Sci Pollut Res Int. 2024 Jan 29. doi: 10.1007/s11356-024-32090-x.
Microbial fuel cells (MFCs), hailed as a promising technology, hold the potential to combat various wastewater pollutants while simultaneously converting their chemical energy into electricity through biocatalysts. This study explores the applicability of a dual compartment MFC (DC-MFC) under varying conditions, targeting the removal of chemical oxygen demand (COD) from landfill leachate and electricity generation. In this setup, anaerobic sludge from a wastewater treatment plant serves as the inoculum in the anode compartment of the MFC, with a Nafion117 membrane acting as the separator between MFC units. The cathode compartments are filled with distilled water and continually aerated for 24 h to enhance air supply. The study assesses the MFC's performance across different COD concentrations, focusing on COD removal, power generation, and Coulombic efficiency. The findings reveal that COD removal efficiency is notably enhanced at higher concentrations of organic matter. Specifically, at a COD concentration of 3325.0 mg L, the MFC exhibited the highest COD removal efficiency (89%) and maximum power density (339.41 mWm), accompanied by a Coulombic efficiency of 25.5%. However, as the initial substrate concentration increased to 3825 mg L, the efficiency decreased to 72%, with a Coulombic efficiency of 13.56% and a power density of 262.34 mWm. Optical density levels increased due to bacterial growth at ambient temperature and neutral pH, reflecting the dynamic microbial response within the system.
微生物燃料电池（MFCs）被誉为一项很有前景的技术，有潜力去除各种废水污染物，同时通过生物催化剂将其化学能转化为电能。本研究探讨了双室微生物燃料电池（DC-MFC）在不同条件下的适用性，目标是去除垃圾渗滤液中的化学需氧量（COD）并实现发电。在此装置中，来自污水处理厂的厌氧污泥用作MFC阳极室的接种物，Nafion117膜作为MFC单元之间的分隔物。阴极室充满蒸馏水，并持续曝气24小时以增加空气供应。该研究评估了MFC在不同COD浓度下的性能，重点关注COD去除、发电和库仑效率。研究结果表明，在较高的有机物浓度下，COD去除效率显著提高。具体而言，在COD浓度为3325.0 mg/L时，MFC表现出最高的COD去除效率（89%）和最大功率密度（339.41 mW/m²），同时库仑效率为25.5%。然而，当初始底物浓度增加到3825 mg/L时，效率降至72%，库仑效率为13.56%，功率密度为262.34 mW/m²。由于在环境温度和中性pH条件下细菌生长，光密度水平增加，反映了系统内动态的微生物反应。
