Enhancement of starting up anaerobic digestion of lignocellulosic substrate: fique’s bagasse as an example
2012
Quintero, Mabel | Castro, Liliana | Ortiz, Claudia | Guzmán, Carolina | Escalante, Humberto
In Colombia there are 20,000ha of fique fields (Furcraea sp., family Agavaceae), that produce around 93,400tons of fique’s bagasse per year. These residuals are disposed into rivers and soil causing pollution. According to physicochemical characteristics, the lignocellulosic residues from fique crops (fique’s bagasse) are appropriate carbon source to biogas production. Anaerobic digestion from fique’s Bagasse (FB) requires a specialized microbial consortium capable of degrading its high lignocellulosic concentration. In this study, the capacities of seven microbial consortia for biomethane potential (BMP) from FB were evaluated. Inoculum of ruminal liquid achieved high hydrolytic activity (0.068gCOD/gVSSday), whereas pig waste sludge inoculum showed high methanogenic activity (0.146gCOD/gVSSday). Mixtures of these two inoculums (RL+PWS) showed the best yields for biomethane potential (0.3m³CH4/KgVSad).
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