Abstract

SANDOVAL T., Andrés; SANTACRUZ F., Fernando; CHUQUER S., David  and  ASTORGA G., Diana. Analysis of microbial inoculants for the optimization of biogas production from slaughterhouse mud. Rev. Inv. Cs. Agro. y Vet. [online]. 2020, vol.4, n.12, pp.255-286. ISSN 2664-0902.

Abstract The need of an appropriate management of slaughterhouse waste and its possible use as a renewable energy source in rural territories, which could also stop environmental deterioration, led to microbial technologies. Viscera, blood and feces are rich in essential substrates for biofuels. In search for enhanced metanogenic efficiency of slaughterhouse waste in a rural Parrish of the Metropolitan District of Quito, microbial inoculants were investigated. Quality and quantity of biogas produced by intact consortia and isolated microbial strains from nine 15 cm-thick layers of mud in the vertical gradient of a waste collector were examined. Two of the seven strains that produced biogas of a total of 36 isolated microbial strains and a consortium produced more than 87%-methane biogas after 28 days of incubation. Within all possible combinations of these two strains and the consortium, one of the confectioned microbial inoculants produced not only the higher quantity of biogas: it also reached a methane purity of 95.17%. Therefore, the generation of microbial inoculants with efficient methanogenic strains and consortia may optimize the biodigestión processes leading to energetic exploitation of slaughterhouse mud.

Keywords : Biogas; methanogenic efficiency; methanogenic inoculum; microbial consortium; organic waste.

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