磁场和混合接种对微生物燃料电池产电性能影响及机制研究

发布时间：2018-07-04 23:12

本文选题：微生物燃料电池 + 磁场　；参考：《华东理工大学》2015年硕士论文

【摘要】：微生物燃料电池(Microbial fuel cell, MFC)是一种以微生物作为催化剂,利用污水中的有机物进行产电的新技术。本文主要研究了动态磁场驯化、阳极垂直施加不同强度的静态磁场、以及Geobacter sulfurreducens 和 Shewanella oneidensis MR-1 混合接种对 MFC产电性能的影响及其作用机制。主要实验结果如下：(1)动态磁场处理使产电菌反应器的启动时间延长,稳定电压降低,表观内阻变大,其中空白、100mT、200mT反应器的表观内阻依次为329Ω、507Ω和353Ω;通过电化学阻抗谱测试可知,经磁场处理的产电菌MFC全电池的活化内阻相比对照组MFC活化内阻变大,其中空白、100mT、200mT反应器的活化内阻依次为12.34Ω、28.29Ω、16.87Ω；经过循环伏安测试发现动态磁场处理降低了产电菌的电化学活性。(2)在磁场作用下,相对空白对照组MFC产电性能变强,表观内阻明显变小,在一定强度的磁场作用下,电极表面的电活性物质增多,活化内阻变小。施加100mT、 200mT、400mT磁场的反应器阳极表面电活化物质的浓度分别为4.58×10-10、9.01×10-10、7.36×10-10 mol·cm-2大于空白对照组3.60×10-10 mol·cm-2。且在已经完成启动的MFC反应器阳极一侧加载200mT静态磁场后,MFC的产电功率变大。(3)接种不同的产电菌对MFC产电性能和阻抗谱有很大影响。混菌接种的反应器的产电功率(0.039mW/m2)明显优于单一产电菌接种的反应器,其最大功率密度相对Geobacter sulfurreducens接种的微生物燃料电池(0.032mW/m2)提高了20%,是Shewanella oneidensis MR-1接种的微生物燃料电池(0.0072mW/m2)的4倍左右。
[Abstract]:Microbial fuel cell (MFC) is a new technology which uses microbial as catalyst to produce electricity from organic matter in sewage. In this paper, the effects of dynamic magnetic field acclimation, anode vertical application of static magnetic field with different intensities, and mixed inoculation of Geobacter sulfurreducens and Shewanella oneidensis MR-1 on the electrical properties of MFCs were studied. The main experimental results are as follows: (1) dynamic magnetic field treatment can prolong the start-up time, decrease the stable voltage and increase the apparent internal resistance. The apparent internal resistance of the blank 100 Mt / 200mT reactor is 329 惟 ~ 507 惟 and 353 惟, respectively. Compared with the control group, the activated internal resistance of the electrogen-producing bacteria MFC treated by magnetic field was larger than that of the control group. The activation internal resistance of the blank 100m T ~ (2 +) 200mT reactor was 12.34 惟 ~ 28.29 惟 ~ (16.87) 惟. After cyclic voltammetry test, it was found that dynamic magnetic field treatment decreased the electrochemical activity of electroproducing bacteria. (2) compared with the blank control group, the electrical properties of MFC increased significantly, and the apparent internal resistance became smaller, and under the action of a certain intensity of magnetic field, The electroactive substances on the electrode surface increased and the activation internal resistance decreased. The concentration of electroactive substances on the anode surface of the reactor with a magnetic field of 100mT, 200mTX 400mT was 4.58 脳 10-10, 9.01 脳 10-10, 7.36 脳 10-10 mol cm-2 and 3.60 脳 10-10 mol / cm ~ (-2), respectively. The electric power of MFC increased after loading 200mT static magnetic field on the anode side of the completed MFC reactor. (3) inoculation with different electrogen-producing bacteria had great influence on the electrical properties and impedance spectrum of MFC. The electric power of the mixed inoculation reactor (0.039 MW / m2) was significantly higher than that of the single electrobacillus inoculated reactor. The maximum power density of the reactor increased by 20% compared with that of the microorganism fuel cell inoculated with Geobacter sulfurreducens (0.032 mW / m2), which was about 4 times of that of the microbial fuel cell inoculated with Shewanella oneidensis MR-1 (0.0072 MW / m ~ 2).
【学位授予单位】：华东理工大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TM911.45

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