生物燃料电池处理生活污水同步产电特性研究

发布时间：2018-03-24 04:26

  本文选题：生物燃料电池　切入点：浓度　出处：《燃料化学学报》2014年04期

【摘要】：以某生活污水处理厂缺氧池活性污泥为接种体,以葡萄糖为模拟生活废水,构建双室型微生物燃料电池。利用微生物燃料电池(MFC,Microbial fuel cell)实现生活废水降解与同步产电。研究基质降解动力学及温度对MFC电极过程动力学的影响,明确微生物电化学活性、阳极传荷阻抗、阳极电势、电池产能之间的关系,考察库伦效率及COD去除率。研究结果表明,电池功率输出与基质浓度关系遵循莫顿动力学方程:P=Pmaxc/(ks+c),其中,半饱和常数ks为138.5 mg/L,最大功率密度Pmax为320.2 mW/m2。葡萄糖浓度较小时,反应遵循一级动力学规律:-dcA/dt=kcA,k=0.262 h-1。操作温度从20℃提高到35℃,生物膜电化学活性不断提高,传荷阻抗从361.2Ω减小到36.2Ω,阳极电极电势不断降低,同时,峰值功率密度从80.6 mW/m2提高到183.3 mW/m2。45℃时,产电菌活性降低,峰值功率密度减小到36.8 mW/m2。葡萄糖浓度为1 500 mg/L,温度为35℃时,MFC电化学性能最佳,稳定运行6 h后库伦效率为44.6%,COD去除率为49.2%。
[Abstract]:The activated sludge of anoxic tank in a sewage treatment plant was used as inoculum and glucose was used to simulate the domestic wastewater. A two-chamber microbial fuel cell was constructed. The biodegradation of domestic wastewater and simultaneous generation of electricity were realized by using microbial fuel cell. The effects of substrate degradation kinetics and temperature on the kinetics of MFC electrode process were studied, and the electrochemical activity of microorganism was determined. The relationship between anode load transfer impedance, anode potential and battery capacity, Coulomb efficiency and COD removal efficiency were investigated. The results show that the relationship between battery power output and substrate concentration follows the Morton kinetic equation: 1. The half saturation constant ks is 138.5 mg / L, and the maximum power density Pmax is 320.2 MW / m2. When glucose concentration is small, the reaction follows the first order kinetic law: 1: -dcAr / dttttttttttcAK (0.262h-1.The operating temperature is increased from 20 鈩，

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