Hybrid microbial-photosynthetic biofuel cells for simultaneous bacterial glycerol biotransformation and algal carbon dioxide capture

Journal of the Brazilian Chemical Society

Ramos, Sergio Peres¹  Universidade Católica de Pernambuco, Recife, Brazil¹  Takaki, Galba Maria de Campos¹  Universidade de Pernambuco, Recife, Brazil¹  Universidade Federal de Pernambuco, Recife, Brazil¹  Perez, Maria de los Angeles¹  La Rotta Hernández, Camilo Enrique¹  Leite, Ady Luna¹  Dantas, Patricia Virginia¹ 

关键词: Pseudomonas aeruginosa;    Chlorella vulgaris;    microbial fuel cells;    bioelectrodes;    glycerol biotransformation;    carbon dioxide capture;    electron shuttles;   

DOI  :  10.5935/0103-5053.20140032

学科分类：化学（综合）

来源: SciELO

【 摘 要 】

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 (Idmax), power output (Pdmax) and coulombic efficiencies (CE) were studied. Initially, both systems were evaluated in separate against the corresponding Fe3+|Fe2+ redox pair. In bacterial systems, important results in terms of Idmax of 42 ± 2.1 µA cm-2, CE of 48 ± 2.4% and Pdmax of 350 ± 17.5 mW cm-2 were achieved. Likewise, for isolated algal cathode systems, Idmax of 93 ± 4.65 µA cm-2, CE of 56 ± 2.8% and Pdmax of 3.2 ± 0.16 mW cm-2, were achieved. In contrast, when both systems were coupled, a lower Idmax 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 Idmax of 80 ± 4.0 µA cm-2, CE of 71.5 ± 3.57% and Pdmax of 650 ± 32.5 mW cm-2 were obtained.

【 授权许可】

Unknown