School of Forestry, Northeast Forestry University, Harbin 150040, China.
Water Sci Technol. 2013;68(2):494-8. doi: 10.2166/wst.2013.261.
Molasses wastewater contains large amounts of glucose, and it can provide enough energy for microbial decomposition. The microbial fuel cell (MFC) in this study was demonstrated to be able to treat real wastewater with the benefit of harvesting electricity energy. Efficient operation of this MFC requires a molasses wastewater and preferably an inexpensive anode electrolyte. The results from a batch of experiments showed that molasses wastewater could not only serve as the electron acceptor in anode, but also generate electricity stably. A maximum voltage output of 514.5 mV and a maximum power density of 65.82 mW/m(2) were recorded at external resistance of 1,000 Ω. The MFC not only effectively dealt with the molasses wastewater, the chemical oxygen demand removal rate is 81.22%, but also had a significant effect in the processing of analog silver wastewater. At the end of the experiment, after disassembling the device, silver precipitation was found stacked on the cathode carbon paper electrode, and some black sediment was found at the side of the proton membrane anode.
糖蜜废水含有大量葡萄糖，可以为微生物分解提供足够的能量。本研究中的微生物燃料电池（MFC）被证明可以利用收获电能的优势处理实际废水。该 MFC 的高效运行需要糖蜜废水和最好是廉价的阳极电解液。一批实验的结果表明，糖蜜废水不仅可以作为阳极中的电子受体，而且还可以稳定地发电。在外部电阻为 1000Ω 时，记录到最大电压输出为 514.5mV，最大功率密度为 65.82mW/m2。该 MFC 不仅有效地处理了糖蜜废水，COD 去除率达到 81.22%，而且在模拟含银废水的处理中也有显著效果。实验结束后，在拆开设备后，发现阴极碳纸电极上堆积了银沉淀，质子膜阳极的一侧发现了一些黑色沉淀物。
