Micro-aeration in anode chamber promotes p-nitrophenol degradation and electricity generation in microbial fuel cell. (August 2019)

• Record Type: Journal Article
• Authors: Khan, Aman; Chen, Zhengjun; Zhao, Shuai; Ni, Hongyuhang; Pei, Yaxin; Xu, Rong; Ling, Zhenmin; Salama, El-Sayed; Liu, Pu; Li, Xiangkai
• Is Part Of: Bioresource technology. Volume 285(2019)
• Publication Date: 2019-08
• Subjects: p-Nitrophenol -- Biodegradation -- Aerated anode -- Dissolved oxygen -- Microbial fuel cell; Biomass -- Periodicals; Biomass energy -- Periodicals; Bioremediation -- Periodicals; Agricultural wastes -- Periodicals; Factory and trade waste -- Periodicals; Organic wastes -- Periodicals; Bioénergie -- Périodiques; Déchets agricoles -- Périodiques; Déchets industriels -- Périodiques; Déchets organiques -- Périodiques; Déchets (Combustible) -- Périodiques; 662.88
• DOI: 10.1016/j.biortech.2019.03.130
• Languages: English
• ISSNs: 0960-8524

Abstract

Graphical abstract: Highlights: Aeration promoted PNP degradation and electricity generation in anode MFC. Oxygenase genes were up-regulated at 17.51–39.39-fold in strain LZU-3. Micro-aeration might be an ideal treatment to biodegrade recalcitrant in MFC. Abstract: Biodegradation of recalcitrant organic compounds in microbial fuel cell (MFC) is limited, due to its strong electron affinity and persisted in anaerobic condition. In this study, Pseudomonas monteilii LZU-3 degraded p -nitrophenol (PNP) and generated current at 100 mg L −1 of PNP in anode MFC with the addition of oxygen. The highest PNP degradation was 4, 37.75, and 99.89% in anaerobic, aerobic, and aerated anode of MFC respectively, at 7 h. The maximum voltage generation in aerated anode was 183 mV, which was comparatively higher than aerobic (150 mV) and anaerobic (68 mV). The qRT-PCR results confirmed that the oxygenase genes in strain LZU-3 were up-regulated from 17.51 to 39.39-fold at 1.6–4.5 mg L −1 of oxygen concentrations resulted in PNP degradation in anode MFC. This study demonstrated that supplementation of oxygen into the anode MFC might be a potential approach for biodegradation of recalcitrant compounds and electricity generation.