微生物燃料电池毕业设计论文.doc

微生物燃料电池(Microbialfuelcell,MFC)能够在处理污水的同时将污水中蕴含的化学能转化为电能,是一种低能耗的水处理技术,近年来成为环境领域的研究热点。目前制约 MFC 实际应用的主要因素是成本过高和产电性能偏低。由于电极成本在 MFC 总成本中所占比例最大,同时电极性能也是决定 MFC 性能的关键,因此降低电极成本和优化电极性能对于 MFC 的实用化具有重要意义。本文以推进 MFC 实用化为目标,筛选用于阳极和生物阴极的廉价填料型电极材料,通过电极材料特性和构型的优化提高其产电性能,并将其应用于放大的 MFC 装置。本研究选择廉价的半焦和活性炭与传统的石墨和碳毡电极材料进行产电性能对比。用于阳极时,活性炭产电性能最好,半焦较差。导电性过低是限制半焦阳极性能的主要因素。并分析了不同阳极材料表面的产电微生物、产电过程、产电机理和产电能力的区别。本文可为MFC阳极材料优化、产电微生物的富集、MFC构型改造等组合提供思路,其中着重讨论的不同阳极材料对微生物燃料电池的产电性能影响的相关内容,可为筛选廉价、产电效率高的阳极材料,推动微生物燃料电池实用化提供参考。
关键词:微生物燃料电池;产电微生物;阳极材料;产电性能;成本;大型化
Abstract
Microbial fuel cell (MFC) is a low energy-consuming water treatment technology which can purify wastewater and simultaneouslyconvert its chemical , eonehottopicint the environment field. The practical application of MFC shasbeen limited.
Due to high costsand lowyield sofpower electrode is the largest contribu. Tortotota lcost of MFC and the ponentinde ciding the MFC performance. Thuselectrode costreduction and electrode performance optimization both have great. Significance onpractical application of MFC. To push forward the practical application of MFC, inthisdissertation low costpackedelectrode materialsforanodeandbio-cathodewere selected,and the performance of electrode wasimprovedby optimizing electrode characteristics and configuration. Then the optimized electrode wasused in a largescale MFC. Inexpensivesemicoke and activated carbon were used aselectrode materials pared with conventional materials graphite and carbon felt. When used in anode, activated carbon performed best, but semicoke had poor power generation performance. The extremely low conductivity of semicoke is the main limitation for the low performance of semicoke anode. to analyze different anode material on the surface of the electricigens, electricity production process, electricity generation and electricity generation capacity difference, as MFC anode materials optimization, microbial enrichment, MFC configuration transformation