Department of Civil Engineering, Indian Institute of Technology, Kharagpur 721302, India.
School of Water Resources, Indian Institute of Technology, Kharagpur 721302, India.
Bioresour Technol. 2015 Apr;182:225-231. doi: 10.1016/j.biortech.2015.02.004. Epub 2015 Feb 9.
Waste activated sludge was digested in anodic compartment of dual chambered clayware microbial fuel cell (MFC). Performance of MFC was evaluated using oxygen (MFC-1) and hypochlorite (MFC-2) as cathodic electron acceptors. Power production of 8.7 W/m(3) was achieved using hypochlorite as catholyte, which was two times higher than using oxygen (4.2 W/m(3)). Total chemical oxygen demand of sludge was reduced by 65.4% and 84.7% in MFC-1 and MFC-2, respectively. Total and volatile suspended solids reductions were higher in MFC-2 (75.8% and 80.2%, respectively) as compared to MFC-1 (66.7% and 76.4%, respectively). Use of hypochlorite demonstrated 3.8 times higher Coulombic efficiency (13.8%) than oxygen. Voltammetric and impedance analysis revealed increase in reduction peak (from 8 to 24 mA) and decreased polarization resistance (from 42.6 to 26.5 Ω). Hypochlorite proved to be better cathodic electron acceptor, supporting rapid sludge digestion within 8 days of retention time and improved power production in MFC.
在双室粘土微生物燃料电池（MFC）的阳极室中消化剩余活性污泥。使用氧气（MFC-1）和次氯酸盐（MFC-2）作为阴极电子受体来评估 MFC 的性能。使用次氯酸盐作为阴极电解液，可产生 8.7 W/m(3)的功率，比使用氧气（4.2 W/m(3)）高两倍。污泥的总化学需氧量分别在 MFC-1 和 MFC-2 中降低了 65.4%和 84.7%。与 MFC-1（分别为 66.7%和 76.4%）相比，MFC-2 中的总悬浮固体和挥发性悬浮固体减少率更高（分别为 75.8%和 80.2%）。与氧气相比，次氯酸盐的库仑效率（13.8%）高出 3.8 倍。伏安和阻抗分析显示还原峰（从 8 增加到 24 mA）增加，极化电阻（从 42.6 降低到 26.5 Ω）降低。次氯酸盐被证明是更好的阴极电子受体，可在 8 天的保留时间内支持快速消化污泥，并提高 MFC 的产电功率。
