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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Enhancing the performance of an acetate-fed microbial fuel cell with methylene green

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Author(s):
Marcilio, Rafaella [1] ; Neto, Sidney Aquino [1] ; Ruvieri, Bruno Martins [1] ; Andreote, Fernando Dini [2] ; de Andrade, Adalgisa Rodrigues [3, 1] ; Reginatto, Valeria [1]
Total Authors: 6
Affiliation:
[1] Univ Sao Paulo, Dept Quim, Fac Filosofia Ciencias & Letras Ribeirao Preto, FFCLRP, Av Bandeirantes 3900, BR-14040901 Ribeirao Preto, SP - Brazil
[2] Univ Sao Paulo, Dept Ciencia Solo, Escola Super Agr Luiz Queiroz, Piracicaba, SP - Brazil
[3] UNESP, Inst Chem, Natl Inst Alternat Technol Detect Toxicol Evaluat, POB 355, BR-14800900 Araraquara, SP - Brazil
Total Affiliations: 3
Document type: Journal article
Source: Brazilian Journal of Chemical Engineering; v. 38, n. 3, p. 471-484, SEP 2021.
Web of Science Citations: 0
Abstract

Microbial fuel cells are an eco-friendly technology that decontaminate wastewater and generate electricity by the action of exoelectrogenic microbes. However, mechanisms such as bioanode formation and stabilization and the electron transfer mechanism still have to be elucidated and enhanced before this technology can be scaled up for practical applications. Electrochemical characterization showed that a more electroactive biofilm (power density of 77 +/- 8 mW m(-2)) emerged under a charged surface provided by a continuously applied electric current. Among the different molecules evaluated as electron transfer mediator, methylene green was the only molecule that improved cell performance. Methylene green addition increased the cell voltage by 20% and maintained the cell stable for six more days as compared to the control. Bioanode microbial community analysis revealed a high abundance of Arcobacter and Dechloromonas, which may play roles in electricity generation and methylene green discoloration. Microbial fuel cell voltage and stability were increased upon addition of methylene green, which was degraded in the bioanode over time. Identification of microbial members helps to understand MFC performance and to elucidate how methylene green improves MFC stability. (AU)

FAPESP's process: 18/12471-1 - Sustainable bio-based 1,3-propanediol production from C5/C3 sources by metabolically engineered clostridia
Grantee:Valeria Reginatto Spiller
Support Opportunities: Regular Research Grants
FAPESP's process: 14/50945-4 - INCT 2014: National Institute for Alternative Technologies of Detection, Toxicological Evaluation and Removal of Micropollutants and Radioactivies
Grantee:Maria Valnice Boldrin
Support Opportunities: Research Projects - Thematic Grants