Department of Biological and Ecological Engineering, Oregon State University, Corvallis, OR 97333, USA.
Department of Biological and Ecological Engineering, Oregon State University, Corvallis, OR 97333, USA.
Bioresour Technol. 2014 Aug;166:229-34. doi: 10.1016/j.biortech.2014.05.027. Epub 2014 May 20.
The production of methane from sewage sludge through the use of anaerobic digestion has been able to effectively offset energy costs for wastewater treatment. However, significant energy reserves are left unrecovered and effluent standards are not met necessitating secondary processes such as aeration. In the current study a novel cloth-electrode assembly microbial fuel cell (CEA-MFC) was used to generate electricity from sewage sludge. Fermentation pretreatment of the sludge effectively increased the COD of the supernatant and improved reactor performance. Using the CEA-MFC design, a maximum power density of 1200 mW m(-2) was reached after a fermentation pre-treatment time of 96 h. This power density represents a 275% increase over those previously observed in MFC systems. Results indicate continued improvements are possible and MFCs may be a viable modification to existing wastewater treatment infrastructure.
利用厌氧消化从污水污泥中生产甲烷能够有效地抵消废水处理的能源成本。然而，大量的能源储备仍未得到回收，出水标准也未达到，这就需要曝气等二次处理。在当前的研究中，一种新型的布电极组件微生物燃料电池（CEA-MFC）被用于从污水污泥中发电。污泥的发酵预处理有效地增加了上清液的 COD 并改善了反应器性能。使用 CEA-MFC 设计，在发酵预处理时间为 96 小时后，达到了 1200 mW m(-2)的最大功率密度。这个功率密度比之前在 MFC 系统中观察到的增加了 275%。结果表明，仍有可能进一步改进，并且 MFC 可能是对现有废水处理基础设施的可行改造。
