Min Booki, Kim Jungrae, Oh Sangeun, Regan John M, Logan Bruce E
Department of Civil and Environmental Engineering, The Pennsylvania State University, University Park, PA 16802, USA.
Water Res. 2005 Dec;39(20):4961-8. doi: 10.1016/j.watres.2005.09.039. Epub 2005 Nov 15.
Microbial fuel cells (MFCs) represent a new method for treating animal wastewaters and simultaneously producing electricity. Preliminary tests using a two-chambered MFC with an aqueous cathode indicated that electricity could be generated from swine wastewater containing 8320 +/- 190 mg/L of soluble chemical oxygen demand (SCOD) (maximum power density of 45 mW/m2). More extensive tests with a single-chambered air cathode MFC produced a maximum power density with the animal wastewater of 261 mW/m2 (200 omega resistor), which was 79% larger than that previously obtained with the same system using domestic wastewater (146 +/- 8 mW/m2) due to the higher concentration of organic matter in the swine wastewater. Power generation as a function of substrate concentration was modeled according to saturation kinetics, with a maximum power density of P(max) = 225 mW/m2 (fixed 1000 omega resistor) and half-saturation concentration of K(s) = 1512 mg/L (total COD). Ammonia was removed from 198 +/- 1 to 34 +/- 1 mg/L (83% removal). In order to try to increase power output and overall treatment efficiency, diluted (1:10) wastewater was sonicated and autoclaved. This pretreated wastewater generated 16% more power after treatment (110 +/- 4 mW/m2) than before treatment (96 +/- 4 mW/m2). SCOD removal was increased from 88% to 92% by stirring diluted wastewater, although power output slightly decreased. These results demonstrate that animal wastewaters such as this swine wastewater can be used for power generation in MFCs while at the same time achieving wastewater treatment.
微生物燃料电池（MFCs）是一种处理动物废水并同时发电的新方法。使用带有水相阴极的双室MFC进行的初步测试表明，含有8320±190mg/L可溶性化学需氧量（SCOD）的猪废水能够发电（最大功率密度为45mW/m²）。使用单室空气阴极MFC进行的更广泛测试表明，该动物废水的最大功率密度为261mW/m²（200Ω电阻），由于猪废水中有机物浓度较高，比之前使用该系统处理生活污水时获得的功率密度（146±8mW/m²）高79%。根据饱和动力学对发电与底物浓度的函数关系进行了建模，最大功率密度P(max)=225mW/m²（固定1000Ω电阻），半饱和浓度K(s)=1512mg/L（总COD）。氨氮含量从198±1mg/L降至34±1mg/L（去除率83%）。为了提高功率输出和整体处理效率对稀释（1:10）的废水进行了超声处理和高压灭菌。这种预处理后的废水处理后产生的功率（110±4mW/m²）比处理前（96±4mW/m²）增加了16%。通过搅拌稀释后的废水，SCOD去除率从88%提高到92%，尽管功率输出略有下降。这些结果表明，像这种猪废水之类的动物废水可用于MFCs发电，同时实现废水处理。
