Electricity generation from swine wastewater using microbial fuel cells
Electricity generation from swine wastewater using microbial fuel cells
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DOI：
10.1016/j.watres.2005.09.039
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发表时间：
2005-12-01
期刊：
影响因子：
12.8
通讯作者：
Logan, BE
中科院分区：
文献类型：
--
作者：
Min, B;Kim, JR;Logan, BE
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。采用带水阴极的双室MFC进行的初步试验表明，可从含有8320 +/- 190 mg/L可溶性化学需氧量（SCOD）的猪废水（最大功率密度为45 mW/m(2)）中发电。使用单室空气阴极MFC进行的更广泛的测试产生了动物废水261 mW/m(2) （200 ω电阻）的最大功率密度，由于猪废水中的有机物浓度较高，这比以前使用相同系统使用生活废水（146 +/- 8 mW/m(2)）获得的功率密度大79%。根据饱和动力学建立底物浓度的函数模型，最大功率密度P-max = 225 mW/m(2)（固定1000 ω电阻器），半饱和浓度K-s = 1512 mg/L（总COD）。氨的去除率从198 +/- 1降至34 +/- 1 mg/L（去除率83%）。为了尽量提高功率输出和整体处理效率，稀释（1:10）的废水被超声和高压灭菌。经过预处理的废水在处理后产生的电力（110 +/- 4 mW/m(2)）比处理前（96 +/- 4 mW/m(2)）多16%。通过搅拌稀释后的废水，SCOD去除率从88%提高到92%，但功率输出略有下降。这些结果表明，这种猪废水等动物废水可以在mfc中用于发电，同时实现废水处理。(c) 2005 Elsevier Ltd版权所有。
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/m(2)). More extensive tests with a single-chambered air cathode MFC produced a maximum power density with the animal wastewater of 261 mW/m(2) (200 Omega resistor), which was 79% larger than that previously obtained with the same system using domestic wastewater (146 +/- 8 mW/m(2)) 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/m(2) (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/m(2)) than before treatment (96 +/- 4 mW/m(2)). 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. (c) 2005 Elsevier Ltd. All rights reserved.