Self-sustaining, solar-driven bioelectricity generation in micro-sized microbial fuel cell using co-culture of heterotrophic and photosynthetic bacteria
Self-sustaining, solar-driven bioelectricity generation in micro-sized microbial fuel cell using co-culture of heterotrophic and photosynthetic bacteria
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DOI：
10.1016/j.jpowsour.2017.03.014
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发表时间：
2017-04-30
影响因子：
9.2
通讯作者：
Choi, Seokheun
中科院分区：
文献类型：
--
作者：
Liu, Lin;Choi, Seokheun
在众多极具潜力的能量收集技术中，微生物燃料电池（MFC）技术可以说是最不发达的。尽管如此，令人兴奋的是，微生物可以从任何可生物降解的有机来源（例如废水）中获取电力，这些来源在资源有限的环境中很容易获得。然而，需要不断地引入有机物质，这是该技术的一个限制因素，需要一个主动的喂养系统和额外的动力。在这里，我们展示了利用异养产电细菌和光养生物之间的共生相互作用，从微升规模的微生物燃料电池（MFC）中产生自我维持的生物电。MFC利用光合细菌产生的有机底物，通过异养细菌代谢呼吸持续产生光响应电。在不添加有机燃料的情况下，90亩l室MFC混合培养能产生超过13天的自维持电流，而异养培养在几小时内产生的电流急剧下降。混合培养产生的电流大约是只有光合细菌的装置的70倍。小型化提供了短的启动时间、良好的控制环境和小的内阻。这些优点将成为微发电的通用设计平台。(C) 2017 Elsevier B.V.版权所有
Among many energy harvesting techniques with great potential, microbial fuel cell (MFC) technology is arguably the most underdeveloped. Even so, excitement is building, as microorganisms can harvest electrical power from any biodegradable organic source (e.g. wastewater) that is readily available in resource-limited settings. Nevertheless, the requirement for endless introduction of organic matter imposes a limiting factor to this technology, demanding an active feeding system and additional power. Here, we demonstrated self-sustaining bioelectricity generation from a microliter-scale microbial fuel cell (MFC) by using the syntrophic interaction between heterotrophic exoelectrogenic bacteria and phototrophs. The MFC continuously generated light-responsive electricity from the heterotrophic bacterial metabolic respiration with the organic substrates produced by photosynthetic bacteria. Without additional organic fuel, the mixed culture in a 90-mu L-chamber MFC generated self-sustained current for more than 13 days, while the heterotrophic culture produced current that decreased dramatically within a few hours. The current from the mixed culture was about 70 times greater than that of the device with only photosynthetic bacteria. The miniaturization provided a short start-up time, a well-controlled environment, and small internal resistance. Those advantages will become the general design platform for micropower generation. (C) 2017 Elsevier B.V. All rights reserved.