Hydrogen and electrical energy co-generation by a cooperative fermentation system comprising Clostridium and microbial fuel cell inoculated with port drainage sediment

Author(s)

dos Passos, Vinicius Fabiano ^[1] ; Marcilio, Rafaella ^[1] ; Aquino-Neto, Sidney ^[1] ; Santana, Fabricio Butierres ^[2] ; Franco Dias, Armando Cavalcante ^[3] ; Andreote, Fenando Dini ^[3] ; de Andrade, Adalgisa Rodrigues ^[1] ; Reginatto, Valeria ^[1]

Affiliation

^[1] Univ Sao Paulo, Dept Chem, Fac Philosophy Sci & Letters Ribeirao Preto, Ave Bandeirantes 3900, BR-14040030 Ribeirao Preto, SP - Brazil

^[2] Fed Univ Rio Grande, Sch Chem & Food, Rio Grande, RS - Brazil

^[3] Univ Sao Paulo, Luiz de Queiroz Coll Agr, Dept Soil Sci, Piracicaba, SP - Brazil

• Document type: Journal article
• Source: Bioresource Technology; v. 277, p. 94-103, APR 2019.
• Web of Science Citations: 2

Abstract

This research work has succeeded in recovering energy from glucose by generating H-2 with the aid of a Clostridium beijerinckii strain and obtaining electrical energy from compounds present in the H-2 fermentation effluent in a microbial fuel cell (MFC) seeded with native port drainage sediment. In the fermentation step, 49.5% of the initial glucose concentration (56 mmol/L) was used to produce 104 mmol/L H-2; 5, 33, 3, and 1 mmol/L acetate, butyrate, lactate, and ethanol also emerged, respectively. MFC tests by feeding the anodic compartment with acetate, butyrate, lactate (individually or as a mixture), or the H-2 fermentation effluent provided power density values ranging between 0.6 and 1.2 W/m(2). Acetate furnished the highest power density with a nanowire-rich biofilm despite the lowest anode bacterial concentration (10(12) 16S gene copies/g of sediment). Non-conventional exoelectrogenic microbial communities were observed in the acetate-fed MFC; e.g., Pseudomonadaceae (Pseudomonas) and Clostridia (Acidaminobacter, Fusibacter). (AU)

• FAPESP's process: 18/00789-7 - Obtaining fuels, products, and energy from agroindustrial waste in biological and bioelectrochemical systems: a contribution to bioeconomy.
• Grantee: Valeria Reginatto Spiller
• Support Opportunities: Regular Research Grants