榨菜废水MFC多周期运行产电性能及COD降解

发布时间：2018-01-26 12:48

本文关键词： 微生物燃料电池高盐高浓度榨菜废水多周期运行性能稳定功率输出功率密度曲线回折　出处：《中国环境科学》2017年04期 　论文类型：期刊论文

【摘要】：构建了双室微生物燃料电池系统(MFC)处理高盐高浓度榨菜废水,实现了污水处理与能量回收的双重目的.高盐高浓度榨菜废水MFC多周期运行过程中性能研究表明,该MFC可长期、高效、稳定运行.在1000Ω外接电阻间歇运行条件下,电池运行至第5周期时产电性能达到最佳,最大功率密度、电池内阻及开路电压分别为:7.44W/m~3、88Ω、746mV,COD去除率及库伦效率分别为:(65±2.5)%、(19.3±1)%.启动成功后污染物去除效果随运行时间的延长缓慢提高,运行至第8周期时COD去除率为(73±3.3)%,而库伦效率缓慢降低,最大库伦效率为(19.3±1)%.此外,随着运行时间的延长阳极出水pH值不断减小,酸化程度不断加重.在长期运行过程中系统稳定功率输出所对应的外阻为500Ω左右.实验过程中功率密度和极化曲线出现了回折现象.
[Abstract]:A two-chamber microbial fuel cell system (MFC) was constructed to treat high salt and high concentration pickled vegetable wastewater. The dual purpose of wastewater treatment and energy recovery was realized. The study on the performance of high salt and high concentration pickled vegetable wastewater MFC during multi-cycle operation showed that the MFC could be used for a long time and high efficiency. Stable operation. Under the condition of 1000 惟 external resistance intermittent operation, when the battery runs to the fifth cycle, the electrical performance is optimal, and the maximum power density is achieved. The COD removal efficiency and Coulomb efficiency of the battery with internal resistance and open circuit voltage of 7. 44 W / m ~ 3 ~ (88) 惟 ~ (746)? M ~ (-1) were 65 卤2.5% respectively. After start-up, the pollutant removal efficiency increased slowly with the prolongation of running time, and the removal rate of COD was 73 卤3.3 at the 8th cycle, while the Coulomb efficiency decreased slowly. The maximum Coulomb efficiency is 19.3 卤1g. In addition, the pH value of anodic effluent decreases with the increase of running time. The degree of acidizing is increasing continuously. The external resistance corresponding to the steady power output of the system is about 500 惟 during the long-term operation. The power density and polarization curve of the system are reversed during the experiment.
【作者单位】：重庆大学三峡库区生态环境教育部重点实验室;
【基金】：高等学校学科创新引智计划资助(B13041)
【分类号】：X792;TM911.45
【正文快照】： 榨菜在生产过程中会排放大量高盐高浓度的加工废水[1].现今,榨菜废水主要采用厌氧技术进行预处理,然后利用好氧技术进一步处理,为达标排放,通常会增加物化单元进行强化处理[1].然而常规的好氧技术能耗和运行费用高,并且污泥产量大,污泥的后续治理费用也较高[2].另一方面,研究

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