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Hybrid Microbial-Photosynthetic Biofuel Cells for Simultaneous Bacterial Glycerol Biotransformation and Algal Carbon Dioxide Capture
- Source :
- Journal of the Brazilian Chemical Society v.25 n.3 2014, Journal of the Brazilian Chemical Society, Sociedade Brasileira de Química (SBQ), instacron:SBQ, Journal of the Brazilian Chemical Society, Volume: 25, Issue: 3, Pages: 560-571, Published: MAR 2014
- Publication Year :
- 2014
- Publisher :
- Sociedade Brasileira de Quimica (SBQ), 2014.
-
Abstract
- Power generation at bioanodes of Pseudomonas aeruginosa for glycerol biotransformation was coupled to the carbon dioxide capture in biocathodes of Chlorella vulgaris in hybrid photosynthetic biofuel cells (HPSBC). Biochemical parameters such as microbial growth, substrate consumption, production of bacterial pigments and CO2 capture were studied. Also electrochemical parameters of maxima current densities (Id max), power output (Pd max) and coulombic efficiencies (C E) were studied. Initially, both systems were evaluated in separate against the corresponding Fe3+|Fe2+ redox pair. In bacterial systems, important results in terms of Id max of 42 ± 2.1 µA cm-2, C E of 48 ± 2.4% and Pd max of 350 ± 17.5 mW cm-2 were achieved. Likewise, for isolated algal cathode systems, Id max of 93 ± 4.65 µA cm-2, C E of 56 ± 2.8% and Pd max of 3.2 ± 0.16 mW cm-2, were achieved. In contrast, when both systems were coupled, a lower Id max of 48.5 ± 2.42 µA cm-2 was observed. Finally, bioelectrochemical conditions were improved based on substrate consumption, electrogenic products, cation transport and mediated electron transfer systems. Thus, higher average values for Id max of 80 ± 4.0 µA cm-2, C E of 71.5 ± 3.57% and Pd max of 650 ± 32.5 mW cm-2 were obtained. A geração de potencial em bioânodos de Pseudomonas aeruginosa a partir da bio transformação de glicerol, foi acoplada à captura de dióxido de carbono em biocátodos de Chlorella vulgaris em uma célula a combustível híbrida fotossintética (HPSBC). Parâmetros bioquímicos tais como crescimento microbiano, consumo de substrato, produção de pigmentos bacterianos e a captura de CO2 foram estudados. Igualmente, parâmetros eletroquímicos de densidades de correntes máximas (Id max), geração de densidade potencia máxima (Pd max) e eficiências coulômbicas (C E), foram estudados. Inicialmente, ambos os sistemas foram avaliados em separado contra os correspondentes pares redox Fe3+|Fe2+. No sistema bacteriano, resultados importantes em termos de Id max de 42 ± 2,1 µA cm-2, C E de 48 ± 2,4% e Pd max de 350 ± 17,5 mW cm-2 foram alcançados. Igualmente, para o sistema catódico algal isolado, valores de Id max de 93 ± 4,65 µA cm-2, C E de 56 ± 2,8% e Pd max de 3,2 ± 0,16 mW cm-2, foram atingidos. Em contraste, quando os dois sistemas foram acoplados, um valor menor de Id max de 48,5 ± 2,42 µA cm-2 foi observado. Finalmente, as condições bioeletroquímicas foram melhoradas com base no consumo de substrato, a geração de produtos eletrogênicos, o transporte de cátions e os sistemas para transporte de elétrons empregados. Assim, maiores valores médios para Id max de 80 ± 4,0 µA cm-2, para C E de 71,5 ± 3,57% e para Pd max de 650 ± 32,5 mW cm-2 foram obtidos.
- Subjects :
- microbial fuel cells
Microbial fuel cell
carbon dioxide capture
Chemistry
Substrate (chemistry)
General Chemistry
Bacterial growth
electron shuttles
Photosynthesis
Redox
chemistry.chemical_compound
Biochemistry
Pseudomonas aeruginosa
Carbon dioxide
bioelectrodes
Glycerol
glycerol biotransformation
Chlorella vulgaris
Cation transport
Nuclear chemistry
Subjects
Details
- ISSN :
- 01035053
- Database :
- OpenAIRE
- Journal :
- Journal of the Brazilian Chemical Society
- Accession number :
- edsair.doi.dedup.....8a37344d0157a5295a43e3045c5183ae
- Full Text :
- https://doi.org/10.5935/0103-5053.20140032