| Full text | |
| Author(s): |
Kikuti Mancilio, Lucca Bonjy
;
Ribeiro, Guilherme Augusto
;
Lopes, Erica Mendes
;
Kishi, Luciano Takeshi
;
Martins-Santana, Leonardo
;
Viana de Siqueira, Guilherme Marcelino
;
Andrade, Adalgisa Rodrigues
;
Guazzaroni, Maria-Eugenia
;
Reginatto, Valeria
Total Authors: 9
|
| Document type: | Journal article |
| Source: | CURRENT RESEARCH IN BIOTECHNOLOGY; v. 2, p. 10-pg., 2020-11-01. |
| Abstract | |
The present energy and the waste accumulation crisis make the development of bioelectrochemical systems each day more important as a technology for coupled waste-treatment, electricity production, and biorefinement, whilst closing the circular economy loop. However, its application is still hampered by the complexity of its biocatalysts. This study evaluated, from an ecological and metabolic point of view, Microbial Fuel Cells (MFCs) inoculated with Brazilian marine sediment and fed with synthetic wastewaters contaminated with iron and sulfate, containing acetate as carbon source. Making use of 16S rRNA gene amplification analyses and physical- and electrochemical assays, a stable core community was observed throughout different treatments, lacking in the taxa traditionally affiliated with MFCs, while rich in alkaliphiles and acetogens, namely Desulfomicrobium, Advenella, Tindallia, Clostridium, and Desulfuromonas. MFCs supplemented with iron and sulfate obtained more stable electrochemical performances, although the core microbial community remains unchanged, apart from a slight shift within the relative dominance of each group within the core. The use of these common pollutants affected the nutritional profile by activating different metabolic pathways for iron and sulfate cycling coupled to the ubiquitous nutrients, while strongly influencing ammonia balance. This study highlights the hidden potential to be explored in novel inocula from this still poorly investigated Southern Hemisphere and provides insights into what may be used as tools to better manipulate the communities constituting MFC bioanodes. (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 |
| FAPESP's process: | 18/15528-4 - Enrichment of microbial consortium in exoelectrogenic bacteria for its use as biocatalyst in microbial fuel cells |
| Grantee: | Lucca Bonjy Kikuti Mancilio |
| Support Opportunities: | Scholarships in Brazil - Scientific Initiation |
| FAPESP's process: | 15/04309-1 - Novel approaches to improve functional screening of biocatalysts in metagenomic libraries |
| Grantee: | María Eugenia Guazzaroni |
| Support Opportunities: | Research Grants - Young Investigators Grants |
| FAPESP's process: | 16/18827-7 - Integrating protein engineering and synthetic biology to develop new high-throughput selection systems |
| Grantee: | Lucas Ferreira Ribeiro |
| Support Opportunities: | Scholarships in Brazil - Post-Doctoral |