Influencia del origen del inóculo sobre la producción de biohidrógeno
DOI:
https://doi.org/10.29059/cienciauat.v10i2.651Palabras clave:
biohidrógeno, inóculo, pretratamiento.Resumen
El biohidrógeno se considera el más prometedor de los biocombustibles por generar solo agua como residuo de su combustión. En este trabajo se compararon dos inóculos para la producción de biohidrógeno; el primero proveniente de la planta de tratamiento de una industria cervecera (Inóculo A) y el segundo de una planta de tratamiento de aguas residuales domésticas (Inóculo B). En ambos casos, para la selección de microorganismos productores de biohidrógeno se empleó un pretratamiento, consistente en choque térmico por 24 h a 104 °C de temperatura, seguido de una trituración hasta alcanzar la consistencia de polvo. La producción de biohidrógeno acumulado se ajustó al modelo de Gompertz, demostrando que a pesar de que se operó con un sustrato consistente de solución de glucosa al 5 %, enriquecido con medio mineral, agitación 15.71 rad/s y temperatura de 35 ºC, el tiempo de latencia y la productividad fueron distintos. Los reactores del Inóculo A generaron un acumulado de 128.27 mL de biohidrógeno, 12 veces mayor que los del Inóculo B (9.11 mL), con productividades de 85.52 mL y 6.07 mL de H2/Lreactor/d respectivamente, lo que se atribuye a las cantidades de microorganismos presentes en los inóculos comparados. La concentración del biohidrógeno varió desde 0 % hasta 72.42 % para el Inóculo A y de 0 % a unos 29.49 % para el Inóculo B. El Inóculo A mostró alto potencial para la producción de biohidrógeno.
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