ResumenSe monitoreó la generación de electricidad de bacterias electrogénicas en celdas de combustibles microbianas de cámara simple (CCMs), usando electrodos de fibra de carbono, con dos inóculos. El primer inóculo se preparó con suelo no intervenido y residuos sólidos orgánicos de la región amazónica de Ecuador y el segundo con suelo no intervenido y residuos sólidos orgánicos de la región alto andina de Ecuador. Se monitoreó el proceso durante 171 días sin renovación del combustible microbiano. Se emplearon CCMs con volúmenes de 20 L, 12 L y 4 L, observándose la influencia en el voltaje de salida. El mejor experimento con suelo de la región alto andina fueron las CCMs de 12 L con una generación promedio de 317 mV, mientras que con suelo de la región amazónica fueron las CCMs de 4 L, generando 270 mV.
Palabras clave: celda de combustible microbiano, bioelectricidad, residuos sólidos orgánicos, bacterias electrogénicas, bioconversión
Bioconversion of Organic solid Wastes with Soils from the Amazonian and High Andean Regions of Ecuador in Single Chamber Microbial Fuel Cells AbstractBioelectricity generation from electrogenic bacteria in single chamber microbial fuel cells (MFCs) was monitored. Carbon fiber as electrodes and two different inoculums were used. The first inoculum was prepared with undisturbed soil and organic solid wastes from the Amazonian region in Ecuador. The second was prepared using undisturbed soil and organic solid wastes from the high Andean region in Ecuador. The process was monitored during 171 days without renovation of microbial fuel. In this work, MFCs with volumes of 20 L, 12 L and 4 L were employed, observing the influence on the output voltage. The best experiment with soil from the high Andean region were the MFCs of 12 L with 317 mV as average generation, while the experiment with soil from the Amazonian region were the MFCs of 4 L, producing 270 mV.
ResumenSe describe el comportamiento de organismos unicelulares estimulados con campos magnéticos constantes de baja intensidad generada por magnetos permanentes. Se analiza su efecto en la eficiencia de degradación en el tratamiento de residuos sólidos orgánicos, empleando un consorcio microbiano comercial, monitoreando la temperatura y a tiempos finales el pH y la relación carbono: nitrógeno. Del estudio se concluye que la aplicación de campos magnéticos constantes de baja intensidad a microorganismos benéficos en los procesos de descomposición de residuos sólidos orgánicos urbanos es positiva.
Palabras clave: microorganismos, campo magnético constante, descomposición biológica, residuos orgánicos
ABSTRACTThe behavior of unicellular organisms stimulated with constant magnetic fields of low intensity generated by permanent magnetos is described. The effect of them on the efficiency of degradation in the treatment of organic solid wastes is analyzed, using a commercial microbial consortium, controlling the temperature and at ending times, the pH and the carbon-nitrogen ratio. It is concluded from the study that the application of constant magnetic fields of low intensity to beneficial microorganisms in the processes of decomposition of urban organic solid wastes is positive.
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