Adaptación de Inóculos Durante el Arranque de la Digestión Anaerobia con Residuos Sólidos Orgánicos

Abstract

In this study, the adaptation of two inoculums, taken from a dairy industry and a brewing industry, in continuous anaerobic flow stirred digesters (CSTR) was analyzed. The study is needed because in the use of anaerobic technology, the start-up of the system is critical and slow and inoculation is used to speed up the start-up time in anaerobic digesters. The food waste and inoculums were characterized, the digesters were fed at the same concentration and composition of organic waste, and degradation reaction was analyzed during 150 days. The adaptation inoculum two (brewing industry) to the organic residue was faster and more stable in the degradation process, resulting in a higher yield of biogas and methane concentration (48.3%). Digestion systems operating with a pH below 6.5 produce biogas with low methane content.