Busca avançada
Ano de início
Entree
(Referência obtida automaticamente do Web of Science, por meio da informação sobre o financiamento pela FAPESP e o número do processo correspondente, incluída na publicação pelos autores.)

On the Effects of Ferricyanide as Cathodic Mediator on the Performance of Microbial Fuel Cells

Texto completo
Autor(es):
Penteado, Eduardo D. ; Maria Fernandez-Marchante, Carmen ; Zaiat, Marcelo ; Gonzalez, Ernesto Rafael ; Andres Rodrigo, Manuel
Número total de Autores: 5
Tipo de documento: Artigo Científico
Fonte: ELECTROCATALYSIS; v. 8, n. 1, p. 59-66, JAN 2017.
Citações Web of Science: 8
Resumo

This study provides an insight into the long-term influence of the use of ferricyanide in the cathode chamber of a microbial fuel cell (MFC) on the power generated and the COD removal attained. Two MFCs were operated in semicontinuous mode, using winery wastewater as fuel, activated sludge as the anodic inoculum, and concentrations of 0.05 and 0.25 M of ferrocyanide added in the cathode chamber as redox mediators. The MFC used had two chambers separated by a proton exchange membrane SterionA (R). The results show that permeability of the membrane to mediators is a factor of the major significance. Under no crossover, the mediator produced a positive effect on the electricity generation and COD removal. However, as the experiments progressed, a significant concentration of mediator was detected in the anode chamber and the performance of the MFC gets worse. This work reports results that help to understand the main processes happening in the MFC. Crossover of ferrocyanide and ferricyanide to the anodic chamber reduces efficiency in the production of electricity The couple ferrocyanide/ferricyanide in the cathode chamber of an MFC can improve the performance in terms of COD removal and energy efficiency At low mediator concentration, a maximum in the power generation and COD removal can be attained At high mediator concentration, there was inhibition of biodegradation of winery wastewater. (AU)

Processo FAPESP: 09/15984-0 - Produção de bioenergia no tratamento de águas residuárias e adequação ambiental dos efluentes e resíduos gerados
Beneficiário:Marcelo Zaiat
Linha de fomento: Auxílio à Pesquisa - Temático
Processo FAPESP: 11/23026-0 - Tratamento de águas residuárias em células a combustíveis microbianas e geração de energia elétrica direta: fundamentos e aplicação
Beneficiário:Eduardo Dellosso Penteado
Linha de fomento: Bolsas no Brasil - Doutorado
Processo FAPESP: 14/07904-5 - Tratamento de água residuária de vinicultura em célula a combustível microbiana
Beneficiário:Eduardo Dellosso Penteado
Linha de fomento: Bolsas no Exterior - Estágio de Pesquisa - Doutorado