Electricity and disinfectant production from wastewater: Microbial Fuel Cell as a self-powered electrolyser.
Electricity and disinfectant production from wastewater: Microbial Fuel Cell as a self-powered electrolyser.
复制标题
废水的电力和消毒剂生产：微生物燃料电池是一种自供电的电解剂。
DOI：
10.1038/srep25571
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发表时间：
2016-05-12
影响因子：
4.6
通讯作者：
Ieropoulos IA
中科院分区：
文献类型：
--
作者：
Gajda I;Greenman J;Melhuish C;Ieropoulos IA
这项研究提出了一种简单且可持续的微生物燃料电池，作为独立的自供电反应器，用于原位废水电解，从废水中回收氮。提出了一种过程，其中 MFC 的电性能驱动废水电解，以在同一反应器内自生成阴极电解液。 MFC 的设计目的是收集内室中产生的阴极电解液，这表明液体生产率在很大程度上与电流产生成正比。与对照（开路）扩散液相比，阴极电解液表现出杀菌特性，并减少了阴极电极上可观察到的生物膜形成。使用通过将生物发光大肠杆菌目标（作为替代大肠菌）暴露于阴极电解液而构建的细菌杀灭曲线来确认杀灭效果，其中观察到快速杀灭率。因此，微生物燃料电池可以用作水回收系统、限制不良生物膜形成的消毒剂/清洁剂发生器，以及作为无水小便器中的清洗剂以改善卫生状况。这种简单且易于实施的 MFC 系统可以将有机废物直接转化为电力和自驱动氮气以及水回收。这可能会导致可持续废水处理的能源积极生物工艺的发展。
This study presents a simple and sustainable Microbial Fuel Cell as a standalone, self-powered reactor for in situ wastewater electrolysis, recovering nitrogen from wastewater. A process is proposed whereby the MFC electrical performance drives the electrolysis of wastewater towards the self-generation of catholyte within the same reactor. The MFCs were designed to harvest the generated catholyte in the internal chamber, which showed that liquid production rates are largely proportional to electrical current generation. The catholyte demonstrated bactericidal properties, compared to the control (open-circuit) diffusate, and reduced observable biofilm formation on the cathode electrode. Killing effects were confirmed using bacterial kill curves constructed by exposing a bioluminescent Escherichia coli target, as a surrogate coliform, to catholyte where a rapid kill rate was observed. Therefore, MFCs could serve as a water recovery system, a disinfectant/cleaner generator that limits undesired biofilm formation and as a washing agent in waterless urinals to improve sanitation. This simple and ready to implement MFC system can convert organic waste directly into electricity and self-driven nitrogen along with water recovery. This could lead to the development of energy positive bioprocesses for sustainable wastewater treatment.