Institute of Environmental Sciences and Engineering (IESE), School of Civil and Environmental Engineering (SCEE), National University of Sciences and Technology (NUST), Sector H-12, Islamabad, 44000, Pakistan E-mail:
Water Sci Technol. 2020 Apr;81(7):1336-1344. doi: 10.2166/wst.2019.387.
The microbial fuel cell (MFC) provides new opportunities for energy generation and wastewater treatment through conversion of organic matter into electricity by electrogenic bacteria. This study investigates the effect of different types and concentrations of substrates on the performance of a double chamber microbial fuel cell (DCMFC). Three mediator-less laboratory-scale DCMFCs were used in this study, which were equipped with graphite electrode and cation exchange membrane. The MFCs were fed with three different types of substrates (glucose, acetate and sucrose) at a chemical oxygen demand (COD) concentration of 1,000 mg/L. The selected substrate (acetate) was studied for three different concentrations of 500, 2,000 and 3,000 mg/L of COD. Results demonstrated that acetate was the best substrate among the three different substrates with maximum power density and COD removal of 91 mW/m and 77%, respectively. Concentration of 2,000 mg/L was the best concentration in terms of performance with maximum power density and COD removal of 114 mW/m and 79%, respectively. The polarization curve shows that ohmic losses were dominant in DCMFCs established for all three substrates and concentrations.
微生物燃料电池（MFC）通过电活性细菌将有机物转化为电能，为能源产生和废水处理提供了新的机会。本研究探讨了不同类型和浓度的基质对双室微生物燃料电池（DCMFC）性能的影响。本研究使用了三种无介体实验室规模的 DCMFC，它们配备了石墨电极和阳离子交换膜。MFC 以化学需氧量（COD）浓度为 1000mg/L 的三种不同类型的基质（葡萄糖、醋酸盐和蔗糖）进料。选择的基质（醋酸盐）研究了三种不同浓度的 COD 分别为 500、2000 和 3000mg/L。结果表明，在三种不同基质中，醋酸盐是最佳基质，最大功率密度和 COD 去除率分别为 91mW/m 和 77%。就性能而言，2000mg/L 的浓度是最佳浓度，最大功率密度和 COD 去除率分别为 114mW/m 和 79%。极化曲线表明，对于所有三种基质和浓度建立的 DCMFC，欧姆损耗占主导地位。
