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Bridging between electrochemistry and microbiology for a brighter future: Microbial fuel cells

机译：电化学与微生物学之间的桥梁，共创美好未来：微生物燃料电池

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In a world of global warming and limited renewable resources, microbial fuel cells (MFCs) gain momentum in relevance and efficiency. Utilizing just organic waste and electrogenic mud microbes found in most parts of the world, these battery-like mechanisms can recycle waste to produce consumable electricity. After inserting mud and a food substrate, the microbes in the MFCs feed on the substrate and release electrons. These electrons flow through the MFC wiring from an anode to a cathode, can be used for external use, and ultimately react with oxygen to form purifiable water. MFCs from a supplier were used to test the effects of amount and different types of food substrates such as white sugar and compost on maximum electrical output. Results yielded that different cultures of mud and bacteria need certain optimal amounts and proportions of nutrients in order to yield the highest output. High amounts of sugar substrate kills the microbes due to dehydration, and the microbes need a 1:2:1 ratio of nitrogen, carbon, and phosphorous compounds (tested with soil indicators). Using the substrate that provides the highest output at a certain amount in multiple MFCs, a high electron flow was generated after connecting the MFCs in a series circuit. An external USB boost converter hardware mechanism was attached to the circuit, and channeled the electricity made into charging smartphones. In the future, the USB boost converter hardware must be able to charge a smartphone faster to improve its efficiency. Through this research, the combination of electrochemistry, mechanical engineering, and microbiology work in tandem to provide consistent accessible sources of energy in African villages.
机译：在全球变暖和可再生资源有限的世界中，微生物燃料电池（MFCs）在相关性和效率上获得了动力。这些类似电池的机制仅利用世界上大多数地区发现的有机废物和电泥浆微生物，可以回收利用废物产生可消耗的电能。插入泥浆和食物基质后，MFC中的微生物以基质为食并释放电子。这些电子从阳极流向阴极，流经MFC布线，可用于外部用途，最终与氧气反应生成可净化的水。供应商提供的MFC用于测试数量和不同类型的食物基质（如白糖和堆肥）对最大电力输出的影响。结果表明，不同的泥和细菌培养物需要一定的最佳数量和比例的养分才能获得最高产量。大量的糖底物会因脱水而杀死微生物，并且微生物需要氮，碳和磷化合物的比例为1：2：1（已通过土壤指示剂测试）。使用在多个MFC中以一定量提供最高输出的基板，在将MFC串联连接后产生了高电子流。电路上连接了外部USB Boost转换器硬件机制，并将产生的电能传导给智能手机充电。将来，USB Boost转换器硬件必须能够更快地为智能手机充电，以提高其效率。通过这项研究，将电化学，机械工程和微生物学相结合，共同为非洲村庄提供了始终如一的可利用能源。

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