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| 浮萍热裂解处理及其在微生物燃料电池中的产电性能研究 |
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王方1, 王婷2, 李婕羚2, 韦士程2,3, 刘广立2, 骆海萍2, 张仁铎2
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1.南方电网调峰调频发电有限公司, 广东 广州 510630;2.中山大学 环境科学与工程学院, 广东 广州 510006;3.广西壮族自治区环境保护科学研究院, 广西 南宁 530022
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| 摘要: |
| 以浮萍为生物质能原料，采用酸式热裂解进行预处理，考察了处理液在微生物燃料电池（MFC）中的产电性能.结果表明：浮萍热裂解最佳预处理条件为：反应温度160℃，反应时间80 min，草酸投加量3%（质量分数）.该条件下每克浮萍的还原糖产量为0.272 g，浮萍固体消化率可达到55%.当采用稀释10倍的热裂解液时，MFC的最大功率密度为521 mW·m-2，总内阻最小值为145.9 Ω，库仑效率（CE）最大值为12.1%.浮萍酸式热裂解液浓度的增加，对MFC输出的最大电压影响不大，化学需氧量（COD）的去除率均可达到91%以上，最终pH值在7.7~8.0.三维荧光光谱分析结果表明：水中的多种有机物均得到了有效的降解.在稀释20，10和5倍酸热裂解液条件下，厌氧醋菌属（Acetoanaerobium）相对丰度分别为30.1%，42.2%和33.8%.牦牛瘤胃菌属（Proteiniclasticum）在稀释20倍时相对丰度最高，为19.5%；在稀释5倍酸热裂解液条件下，产乙酸嗜蛋白质菌属（Proteiniphilum）相对丰度最高达到16.0%. |
| 关键词: 浮萍 热裂解 微生物燃料电池（MFC） 生物质能 产电 |
| DOI：10.3969/J.ISSN.1000-5137.2021.04.013 |
| 分类号:X835 |
| 基金项目:国家重点研发计划课题（2017YFB0903701，2017YFB0903703） |
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| Duckweed pyrolysis and its power generation in microbial fuel cells |
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WANG Fang1, WANG Ting2, LI Jieling2, WEI Shicheng2,3, LIU Guangli2, LUO Haiping2, ZHANG Renduo2
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1.CSG Power Generation Company, Guangzhou 510630, Guangdong, China;2.School of Environmental Science and Engineering, Sun Yat-Sen University, Guangzhou 510006, Guangdong, China;3.Environmental Protection Research Institute of Guangxi Zhuang Autonomous Region, Nanning 530022, Guangxi, China
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| Abstract: |
| Duckweed, as raw material of biomass energy, was pretreated by using pyrolysis and then used for electricity generation in microbial fuel cell(MFC). Experimental result showed that the optimized conditions for the pretreatment were:reaction temperature of 160℃;reaction time of 80 min, oxalic acid dosage of 3%, in which the reducing sugar reached 0.272 g for 1 g duckweed, and digestibility of duckweed reached at 55%. The maximum power density was 521 mW·m-2, the minimum total internal resistance was 145.9 Ω, and maximum Coulombic efficiency(CE) was 12.1%, when the pyrolyzed solution was diluted 10 times. COD removal ratio was more than 91% with concentrations of the pyrolyzed solutions increasing, and final pH was kept at 7.7-8.0, although the maximum voltage output of MFC was not apparently changed. The results of three-dimensional fluorescence spectrum analysis showed that all organic compounds in the influent were effectively biodegraded. The relative abundance of Acetoanaerobium was 30.1%, 42.2% and 33.8% corresponding to the solution dilution of 20, 10 and 5 folds, respectively.The highest relative abundance of Proteiniclasticum was 19.5% under the 20 folds diluted the hydrolyzed solution, while, the highest relative abundance of Proteiniphilum reached 16.0% under the 5 folds diluted the solution. |
| Key words: duckweed pyrolysis microbial fuel cell (MFC) biomass energy electricity generation |
