Evaluation of biocathodes in freshwater and brackish sediment microbial fuel cells
Evaluation of biocathodes in freshwater and brackish sediment microbial fuel cells
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DOI：
10.1007/s00253-010-2645-9
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发表时间：
2010-08-01
影响因子：
5
通讯作者：
Verstraete, Willy
中科院分区：
文献类型：
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作者：
De Schamphelaire, Liesje;Boeckx, Pascal;Verstraete, Willy
生物阴极上的生物膜可以催化阴极氧还原，从而保证高的阴极氧化还原电位。本研究评估了生物阴极在全沉积物微生物燃料电池中的应用。碳毡为基础的生物阴极在淡水系统中进行了评估，并考虑将其应用扩展到微咸系统和/或不锈钢网作为基础材料。通过接种活性微生物，可以在几天内开发出高效的生物阴极。发现碳毡最适合于淡水中的生物阴极，其在盐度约80-250 mM时具有增加的性能。最大长期性能达到12.3 A mu W cm（-2）阴极。不锈钢的相对效益似乎随着盐度的增加而增加。然而，不锈钢阴极与生物膜的组合也可能导致电性能降低。在一个有效的催化阴极生物膜，富集与未培养的变形菌-以前与钢铁废物-观察。
Biofilms on biocathodes can catalyze the cathodic oxygen reduction and accordingly guarantee high cathode redox potentials. The present research assessed the use of biocathodes in full-sediment microbial fuel cells. Carbon felt-based biocathodes were evaluated in freshwater systems, and an extension of their application to brackish systems and/or stainless steel webs as base material was considered. Efficient biocathodes could be developed within days through inoculation with active microorganisms. Carbon felt was found most suited for the biocathodes in freshwater with increased performance at salinities around 80-250 mM. Maximum long-term performance reached 12.3 A mu W cm(-2) cathode. The relative benefit of stainless steel seemed to increase with increasing salinity. A combination of stainless steel cathodes with biofilms could, however, also result in decreased electrical performance. In an efficiently catalyzing cathodic biofilm, an enrichment with an uncultured Proteobacterium-previously correlated with steel waste-was observed.