School of Environmental Science and Engineering, Sun Yat-sen University, Guangzhou, Guangdong 510275, China.
J Hazard Mater. 2010 Apr 15;176(1-3):759-64. doi: 10.1016/j.jhazmat.2009.11.100. Epub 2009 Nov 24.
Indole is a typical refractory and inhibitory compound present in coking wastewater. The aim of this study was to investigate possible electricity generation with indole degradation in the microbial fuel cell (MFC). Experiments were conducted in two types of the MFC: a continuous-fed MFC (C-MFC) and a batch-fed MFC (B-MFC). In the C-MFC, the maximum power densities reached 45.4, 51.2, and 2.1 W/m(3), respectively, from using 1000 mg/L glucose, a mixture of 1000 mg/L glucose and 250 mg/L indole, and 250 mg/L indole as the fuel. When using 250 mg/L indole as the fuel, the removal efficiency of indole was up to 88% within 3 h. Increasing indole concentrations from 250 to 1500 mg/L resulted in decrease of the maximum power densities from 2.1 to 0.8 W/m(3), and average degradation rates from 41.7 to 8.9 mg/(Lh). Compared with the C-MFC, the B-MFC increased the maximum power densities from 2.1 to 3.3 W/m(3) and the coulombic efficiencies from 0.7% to 81.5%. Microbial community analyses showed that the addition of indole obviously changes the microbial community of the anode electrode, including the changes of relative abundance and emergence of new species. The results should be useful for treatment of wastewater containing indole.
吲哚是焦化废水中典型的难降解和抑制性化合物。本研究旨在考察在微生物燃料电池（MFC）中利用吲哚降解进行发电的可能性。实验在两种类型的 MFC 中进行：连续进料 MFC（C-MFC）和分批进料 MFC（B-MFC）。在 C-MFC 中，分别使用 1000 mg/L 葡萄糖、1000 mg/L 葡萄糖和 250 mg/L 吲哚混合物以及 250 mg/L 吲哚作为燃料时，最大功率密度分别达到 45.4、51.2 和 2.1 W/m(3)。当使用 250 mg/L 吲哚作为燃料时，吲哚的去除效率在 3 小时内达到 88%。将吲哚浓度从 250 mg/L 增加到 1500 mg/L，导致最大功率密度从 2.1 W/m(3)降低到 0.8 W/m(3)，平均降解速率从 41.7 mg/(Lh)降低到 8.9 mg/(Lh)。与 C-MFC 相比，B-MFC 将最大功率密度从 2.1 W/m(3)提高到 3.3 W/m(3)，库仑效率从 0.7%提高到 81.5%。微生物群落分析表明，吲哚的添加明显改变了阳极电极的微生物群落，包括相对丰度的变化和新物种的出现。这些结果对于处理含有吲哚的废水应该是有用的。
