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Bioaugmentation with Bacillus subtilis and Cellulomonas fimi to enhance the biodegradation of complex carbohydrates in MFC-fed fruit waste
Biomass & Bioenergy ( IF 6 ) Pub Date : 2023-05-21 , DOI: 10.1016/j.biombioe.2023.106843
Hirra Zafar, Nicolas Peleato, Deborah Roberts

The present study aimed to investigate the biodegradation of waste fruit by microbial fuel cells (MFC) when employing bioaugmentation of polysaccharides degrading bacterial strains and in-situ produced fungal mash. Bioaugmentation with Cellulomonas fimi and Bacillus subtilis both separately and in combination resulted in high chemical oxygen demand removal, high carbohydrates removal, and high solids removal efficiency, which is a slow process otherwise. The results revealed that Cellulomonas fimi alone achieved 60% and 17% higher chemical oxygen demand removal in 24 and 48 h respectively, than control treatment sludge. Cellulomonas fimi alone and in combination with Bacillus subtilis displayed an efficient carbohydrates removal of >90%. Fungal pre-treatment filtered also displayed high organics removal, the coulombic efficiency, however, remained 144% lower than Cellulomonas fimi and Bacillus subtilis augmented reactor. The presented results demonstrate that microbes are crucial for effective functioning of MFC, and high organics removal can be achieved with the use of right microbial cultures.



中文翻译:

用枯草芽孢杆菌和纤维单胞菌进行生物强化,以增强 MFC 喂养的水果废料中复杂碳水化合物的生物降解

本研究旨在研究微生物燃料电池 (MFC) 在采用多糖降解细菌菌株和原位生产的真菌醪的生物强化时对废弃水果的生物降解。纤维单胞菌枯草芽孢杆菌单独和组合的生物强化导致高化学需氧量去除、高碳水化合物去除和高固体去除效率,否则这是一个缓慢的过程。结果表明,与对照处理污泥相比,仅纤维单胞菌 fimi在 24 小时和 48 小时内的化学需氧量去除率分别高出 60% 和 17%。纤维单胞菌 fimi单独和与枯草芽孢杆菌组合表现出 >90% 的有效碳水化合物去除。真菌预处理过滤也显示出高有机物去除率,然而,库仑效率仍然比纤维单胞菌枯草芽孢杆菌增强反应器低 144%。所呈现的结果表明,微生物对于 MFC 的有效运作至关重要,使用正确的微生物培养物可以实现高有机物去除率。

更新日期:2023-05-21
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