Physiological and electrochemical effects of different electron acceptors on bacterial anode respiration in bioelectrochemical systems
| Autor: | Guoping Sun, Yinbo Xiang, Meiying Xu, Yonggang Yang, Wei-Min Wu, Chunyu Xia |
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| Rok vydání: | 2014 |
| Předmět: |
Shewanella
Environmental Engineering Microbial fuel cell Anaerobic respiration Bioelectric Energy Sources Dinitrocresols Inorganic chemistry Electrons Bioengineering Flavin group Shewanella decolorationis Electricity Electrodes Waste Management and Disposal chemistry.chemical_classification Microbial Viability biology Renewable Energy Sustainability and the Environment Electrochemical Techniques General Medicine Electron acceptor biology.organism_classification Aerobiosis Anode chemistry Biofilms Cyclic voltammetry Energy source |
| Zdroj: | Bioresource Technology. 164:270-275 |
| ISSN: | 0960-8524 |
| DOI: | 10.1016/j.biortech.2014.04.098 |
| Popis: | To understand the interactions between bacterial electrode respiration and the other ambient bacterial electron acceptor reductions, alternative electron acceptors (nitrate, Fe2O3, fumarate, azo dye MB17) were added singly or multiply into Shewanella decolorationis microbial fuel cells (MFCs). All the added electron acceptors were reduced simultaneously with current generation. Adding nitrate or MB17 resulted in more rapid cell growth, higher flavin concentration and higher biofilm metabolic viability, but lower columbic efficiency (CE) and normalized energy recovery (NER) while the CE and NER were enhanced by Fe2O3 or fumarate. The added electron acceptors also significantly influenced the cyclic voltammetry profile of anode biofilm probably via altering the cytochrome c expression. The highest power density was observed in MFCs added with MB17 due to the electron shuttle role of the naphthols from MB17 reduction. The results provided important information for MFCs applied in practical environments where contains various electron acceptors. |
| Databáze: | OpenAIRE |
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