Producción de bioelectricidad mediante la acción combinada de delftia acidivorans y citrobacter freundii aisladas de biopelículas de celdas de combustible microbianas para tratamiento de contaminantes

Abstract

The objective of this study was to produce bioelectricity through the combined action of electrogenic bacteria Delftia acidovorans and Citrobacter freundii for the treatment of contaminants; the construction of 6 microbial fuel cells (MCCs) with a volume of 125 ml was carried out, a substrate made at from fruits and vegetables with a 50:50 ratio where the bacteria were inoculated, the distribution of the CCMs was as follows: 2 CCMs with Delftia Acidivorans, 2 CCMs with Citrobacter Freundii and 2 CCMs in the combined action of Delftia Acidivorans and Citrobacter freundii, the same ones that were monitored for 15 days through a data acquisition system which were represented in graphs and tables, the highest averages of voltage, current intensity and power density corresponded to the Combined action of Delftia acidovorans and Citrobacter freundii with values of 244.02 mV, 244.02 μA and 0.189 mW/m2 respectively. In each of the CCMs, pollutant removal parameters were evaluated, obtaining the highest percentages in CCM 5 with values of 80.66% (BOD5), 83.81% (COD) and 86.09% (nitrogen ammoniacal) and in CCM 6 values of 83.48% (BOD5), 80.95% (COD) and 83.33% (ammoniacal nitrogen) were obtained, daily the pH was measured in all CCMs which increased during the investigation, It is concluded that in mixed bacterial cultures, there is higher voltage production and high removal of organic matter, and finally, it is recommended to combine pure cultures using different types of substrate.