进水COD浓度对基于MFC的UASB生物传感器反馈性能的影响

发布时间：2018-02-09 21:37

本文关键词： 升流式厌氧污泥床(UASB) 微生物燃料电池生物传感器反馈时间 pH　出处：《天津工业大学学报》2016年06期 　论文类型：期刊论文

【摘要】：考察MFC生物传感器在不同COD负荷条件下电信号的反馈情况.通过对比不同进水COD条件下的反馈时间,研究p H对MFC传感器反馈性能的影响.实验结果表明:MFC电信号与进水COD质量浓度具有良好的线性关系;在1 000~3 000 mg/L的进水条件下,MFC稳定电压与进水COD质量浓度呈y=3.83×10-5x+0.25的线性增长关系,传感器的反馈时间为4 h;随着进水COD质量浓度提升至4 000~6 000 mg/L,MFC稳定电压与进水COD质量浓度呈y=-5.95×10-5x+0.54的线性下降关系,系统内挥发性脂肪酸大量积累导致p H降至4.6,反馈时间延缓至8.6 h,系统长期处于酸化状态,产电微生物活性降低,电子传递速率受到抑制,传感器反馈时间延迟.
[Abstract]:The feedback of electrical signals from MFC biosensors under different COD loads was investigated. The feedback time under different influent COD conditions was compared. The effect of pH on the feedback performance of MFC sensor is studied. The experimental results show that there is a good linear relationship between the mass concentration of COD in influent and the electrical signal of COD. Under the influent condition of 1 000 脳 10 ~ (-5) mg/L, the stable voltage of COD and the mass concentration of influent COD increased linearly by 3.83 脳 10 ~ (-5) x ~ (0.25). The feedback time of the sensor is 4 h, and with the increase of the influent COD concentration to 6000 mg / L, the linear relationship between the steady voltage and the influent COD concentration is y1-5.95 脳 10 ~ (-5) x 0.54. The accumulation of volatile fatty acids in the system resulted in pH decreasing to 4.6 h and feedback time delaying to 8.6 h. The system was in acidizing state for a long time, the electroproducing microorganism activity was decreased, the electron transfer rate was inhibited, and the sensor feedback time was delayed.
【作者单位】：天津工业大学环境与化学工程学院;天津工业大学省部共建分离膜与膜过程国家重点实验室;天津工业大学天津市水质安全评价与保障技术工程中心;
【基金】：国家自然科学基金面上项目(51378349) 天津市科技计划项目(15PTSYJC00230,14ZCDGSF00128)
【分类号】：X703.1

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