Estudio del uso de la co-digestión anaerobia como alternativa de reducción de la carga orgánica del lactosuero y estabilización microbiológica de la biomasa residual

Abstract

Whey as a main waste of manufacturing cheese, is considered a source of pollution in land and water due his high organic charge, in this way is necessary apply methods that take advantages or reduce, making more low his impact at the environment. Anaerobic co-digestion is a pro option in which the organic load is reduced and biogas is generated, applied as an alternative energy source. Consequently at the research development anaerobic co-digestion was performed of acclimatized cattle manure and whey, at %v/v of 70:30 respectively, in bioreactors of 50 mL with operating volume of 35 mL, 39°C of temperature and intermittent manual agitation. The research was developed in order to carry out a physicochemical stabilization with the measurement of pH, SVT and CH4 volume accumulated during a 60 day period, and microbial stability of the residual biomass by employing CaO with a concentration of 25 %p/v as the alkaline agent. Microbiological parameters were taken as a control, the content of total coliforms, fecal coliforms and Salmonella spp, to determine the possible use or disposal of this waste.