厌氧流化床微生物燃料电池组处理工业废水

发布时间：2018-01-06 21:12

本文关键词：厌氧流化床微生物燃料电池组处理工业废水　出处：《青岛科技大学》2015年硕士论文　论文类型：学位论文

【摘要】：近年来,微生物燃料电池技术(microbial fuel cell,MFC)发展迅速,并已成为了国内外科研工作者研究的热点,本研究是将微生物燃料电池技术与厌氧流化床技术相耦合用于处理工业废水,在处理工业废水的同时输出了电能,实现了能量的回收。在单室填料型无膜空气阴极微生物燃料电池中,采用椰壳活性炭为载体,工业废水为流化介质,在接种厌氧污泥的条件下,采用间歇运行方式,考察了该MFCs处理啤酒废水的产电性能及影响因素。结果表明,串联后的燃料电池,总电压基本为三个单级电池的电压之和,最大电压为623.5 mV,最大功率密度为0.340 mW/m2。该体系内阻为21667Ω。恒温条件下(35℃),处理10天后,啤酒废水COD由初始的2025 mg/L降至107.4mg/L, COD降解率达94.69%。通过液相色谱分析处理前后啤酒废水中的有机物质含量的结果可知,MFCs能够完全降解啤酒废水中的木糖和乙酸等有机物质。以煤化工废水为碳源,构建单室填料型厌氧流化床微生物燃料电池,考察接种液、煤化工废水浓度、pH、温度等因素对电池产电性能的影响。利用微生物燃料电池处理煤化工废水,COD降解率高达(92.5±1.5)%；利用废水中存在的原生菌便可以将电池启动,但是其启动周期较长,在外加接种液的情况下可以快速启动电池；启动时废水浓度的大小对电池稳定运行后的输出功率有较明显的影响,且对电池内阻影响相对较大,当废水COD浓度为2000 mg/L,电池输出功率密度最大,为1.53 mW/m2;当pH值为7时,输出电压最高,为307.6 mV。
[Abstract]:In recent years, microbial fuel cell technology (microbial fuel cell, MFC) developed rapidly, and has become the hotspot of scientific research workers at home and abroad, this study is to investigate the microbial fuel cell technology and anaerobic fluidized bed technology coupled to industrial wastewater treatment, industrial wastewater treatment in the power output at the same time, realize the recovery of energy no film. The air cathode microbial fuel cell in the single room filler type, using coconut shell activated carbon as the carrier, industrial wastewater as the fluidizing medium inoculated with anaerobic sludge under the intermittent operation mode, the MFCs brewery wastewater treatment electricity production performance and influencing factors. The results show that the fuel cell series after the voltage and total voltage is three single battery, the maximum voltage of 623.5 mV, the maximum power density of 0.340 mW/m2. the system resistance is 21667 ohms. The constant temperature conditions (35 C), 10 Days later, the brewery wastewater COD from initial 2025 mg/L to 107.4mg/L, COD degradation rate of 94.69%. analysis results of organic matter content of beer wastewater before and after treatment showed by liquid chromatography, MFCs can be completely degraded in Beer Wastewater by xylose and acetic acid and other organic substances. In coal chemical wastewater as carbon source, construction of single room filler anaerobic fluidized bed microbial fuel cell, study the inoculum concentration, coal chemical wastewater pH, temperature and other factors on MFC. The use of microbial treatment of coal chemical wastewater of fuel cell, the COD degradation rate was (92.5 + 1.5)%; the use of native bacteria in the wastewater can be battery operated, but the start the cycle longer, you can quickly start the battery in the case of external inoculum size; start when the wastewater concentration has obvious effect on the output power of the battery after the stable operation, and the internal resistance of the battery The effect is relatively large. When the concentration of COD is 2000 mg/L, the maximum output power density of the battery is 1.53 mW/m2, and when the pH value is 7, the output voltage is the highest, which is 307.6 mV..

【学位授予单位】：青岛科技大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：X703;TM911.45

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