| 牛粪混合液微生物燃料电池长期运行稳定性研究 |
| 摘要点击 3087 全文点击 1662 投稿时间：2013-09-06 修订日期：2013-12-02 |
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| 中文关键词 牛粪 微生物燃料电池 长期运行稳定性 微生物群落结构 |
| 英文关键词 dairy manure microbial fuel cell(MFC) long-term stability microbial communities |
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| 中文摘要 |
| 长期运行稳定性是微生物燃料电池（microbial fuel cells，MFCs）技术的一项重要特征，是其能否走向实际应用的关键. 生物阴极MFC利用牛粪产电的长期运行特征的研究表明，该MFC可长期、高效、稳定地产电. 在100 Ω外电阻下，171 d的运行期内，电池功率密度平均为6.77 W·m-3±2.11 W·m-3. 第70 d的电池开路电压、内阻、最高功率密度分别为0.874 V、22.1 Ω和14.1 W·m-3. 随着运行时间延长，每30 d的总化学需氧量（total chemical oxygen demand，TCOD）去除量不断递减，而库仑效率（Coulomb efficiency，CE）不断递增，在121~150 d，CE可达17.5%±3.3%. 阳极微生物群落结构分析表明，Proteobacteria（45%）、Bacteroidetes（22%）、Firmicutes（17%）、Actinobacteria（11%）在阳极生物膜中占有优势地位. Clostridium、Cellulomonas等已被证明具有产电能力或纤维素降解能力的细菌是阳极生物膜中的关键功能种群. |
| 英文摘要 |
| Long-term performance is of primary concern when considering the commercialized use of an microbial fuel cell(MFC). The long-term stability of MFC was studied using dairy manure as substrate over a testing time of 171 d. The results showed that the MFC could efficiently recover electricity from dairy manure during the long-time run, and the average power density was 6.77 W·m-3±2.11 W·m-3. On day 70, the polarization curve was measured, the open circuit voltage, internal resistance and maximum power density of MFC were 0.874 V, 22.1 Ω and 14.1 W·m-3, respectively. The 30-day TCOD removal decreased with increasing test time, and the CE during the 121-150 d period reached 17.5%±3.3%. Phylogenetic analyses revealed that the dominant microbial communities in anodic biofilm were Proteobacteria (45%), Bacteroidetes (22%), Firmicutes (17%) and Actinobacteria (11%). At genera level, the bacteria with electricity production and (or) cellulose degradation ability, such as Clostridium and Cellulomonas were the abundant taxa. |
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