Du Haixia, Guo Jiangyang, Xu Yizhen, Wu Yanxia, Li Fusheng, Wu Huifang
College of Urban Construction, Nanjing Tech University, Nanjing 211800, China E-mail:
River Basin Research Center, Gifu University, 1-1 Yanagido, Gifu 501-1193, Japan.
Water Sci Technol. 2018 Oct;78(5-6):1054-1063. doi: 10.2166/wst.2018.371.
The effects of mixed feeding of boiled potato and waste activated sludge (WAS) on the performance of a microbial fuel cell (MFC) in treating solid potato waste were investigated. The coulombic efficiency (CE) of four MFCs fed with potato cubes containing 0, 48.7, 67.3 and 85.6% of boiled potato was 53.5, 70.5, 92.7 and 71.1%, respectively, indicating enhanced electricity generation and the existence of an optimum mixing ratio. The hydrolysis rate estimated using a first-order sequential hydrolysis model increased from 0.061 to 0.191 day, leading to shortening of the startup time for current density reaching its maximum from 25 to 5 days. The final chemical oxygen demand (COD) removal reached 85%. The CE of seven MFCs, fed with raw potato alone, sterilized/unsterilized WAS alone, and four mixed samples of raw potato with sterilized WAS at ratios of 2:1 and 4:1 and unsterilized WAS at 2:1 and 4:1, was found to be 6.1, 43.6, 0.3, 31.0, 16.5, 0.9 and 31.1%, respectively. The hydrolysis rate increased from 0.056 to 0.089 day, and the final COD removal changed from 39.5 to 89.6% following the order: potato alone > mixture of potato & WAS > sterilized WAS alone > unsterilized WAS alone.
研究了将煮土豆与废弃活性污泥（WAS）混合投喂对微生物燃料电池（MFC）处理固体土豆废弃物性能的影响。四个以含0%、48.7%、67.3%和85.6%煮土豆的土豆块为食的MFC的库仑效率（CE）分别为53.5%、70.5%、92.7%和71.1%，表明发电增强且存在最佳混合比例。使用一级顺序水解模型估算的水解速率从0.061天增加到0.191天，使电流密度达到最大值的启动时间从25天缩短至5天。最终化学需氧量（COD）去除率达到85%。发现七个MFC的CE分别为6.1%、43.6%、0.3%、31.0%、16.5%、0.9%和31.1%，它们分别单独投喂生土豆、单独投喂灭菌/未灭菌的WAS，以及以2:1和4:1的比例投喂生土豆与灭菌WAS的四个混合样品和以2:1和4:1的比例投喂生土豆与未灭菌WAS的混合样品。水解速率从0.056天增加到0.089天，最终COD去除率从39.5%变为89.6%，顺序如下：单独土豆＞土豆与WAS的混合物＞单独灭菌WAS＞单独未灭菌WAS。
