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A weak infrared light strengthens anoxygenic photosynthetic bacteria activated sludge for the anaerobic biodegradation of polylactic acid in microbial fuel cell systems
Polymer Degradation and Stability ( IF 5.9 ) Pub Date : 2018-09-27 , DOI: 10.1016/j.polymdegradstab.2018.09.024
Xiang Qi , Enling Tian , Yiwei Ren , Xingzu Wang

Microbial fuel cell (MFC) systems were considered as a promising bioelectricity-harvesting technology in recent decades. Polylactic acid (PLA) as a biodegradable plastic, although widely explored, still presented amount of challenges in an anaerobic treatment system. This study explored that a weak infrared (IR) (850 nm) light emitting diode (LED) strengthened anoxygenic photosynthetic bacteria (APB) activated sludge for the anaerobic biodegradation of PLA in MFC systems. The results showed that MFC system with IR and PLA could generate a sustained bioelectricity and achieve the anaerobic biodegradation of PLA textiles based on bioelectrochemistry, FT-IR and SEM analysis. The microbial community structure analysis suggested that an APB consortium can be enriched using the MFC with IR illumination. Moreover, the existence of IR light could not only prevent algae growth in MFC system but also provide a feasibility for the practical engineering application.



中文翻译:

微弱的红外光增强了厌氧性光合细菌活化的污泥,可用于微生物燃料电池系统中聚乳酸的厌氧生物降解。

近几十年来,微生物燃料电池(MFC)系统被认为是一种有前途的生物电收集技术。聚乳酸(PLA)作为一种可生物降解的塑料,尽管得到了广泛的探索,但在厌氧处理系统中仍然提出了许多挑战。这项研究探索了弱红外(IR)(850 nm)发光二极管(LED)增强了厌氧性光合细菌(APB)活性污泥,用于MFC系统中PLA的厌氧生物降解。结果表明,基于生物电化学,FT-IR和SEM分析,具有IR和PLA的MFC系统可以产生持续的生物电,并实现PLA纺织品的厌氧生物降解。微生物群落结构分析表明,可以使用带有红外照明的MFC来丰富APB财团。而且,

更新日期:2018-09-27
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