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  

Duckweed pyrolysis and its power generation in microbial fuel cells

作　　者：王方 王婷 李婕羚 韦士程 刘广立[2] 骆海萍 张仁铎[2] WANG Fang;WANG Ting;LI Jieling;WEI Shicheng;LIU Guangli;LUO Haiping;ZHANG Renduo(CSG Power Generation Company,Guangzhou 510630,Guangdong,China;School of Environmental Science and Engineering,Sun Yat-Sen University,Guangzhou 510006,Guangdong,China;Environmental Protection Research Institute of Guangxi Zhuang Autonomous Region,Nanning 530022,Guangxi,China)

机构地区：[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

出　　处：《上海师范大学学报（自然科学版）》2021年第4期478-486,共9页Journal of Shanghai Normal University(Natural Sciences)

基　　金：国家重点研发计划课题(2017YFB0903701,2017YFB0903703)。

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145.9Ω,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%.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 145.9Ω,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.

关 键 词：浮萍 热裂解 微生物燃料电池(MFC) 生物质能 产电 

分 类 号：X835[环境科学与工程—环境工程]