Low temperature anaerobic digestion of mixtures of llama, cow and sheep manure for improved methane production

René Alvarez Apaza, Gunnar Lidén

Resultado de la investigación: Contribución a una revistaArtículorevisión exhaustiva

89 Citas (Scopus)


Biogas production in anaerobic digestion in farm-scale units is typically performed under mesophilic conditions when used for producing domestic fuel and stabilizing animal waste for the use of digested manure as a fertilizer. Previous studies on the digestion of llama and cow manure have shown the feasibility of producing biogas under altiplano conditions (low pressure and low temperature) and of llama manure as a promising feedstock. The present study concerns the utilization of various mixtures of feedstocks from the Bolivian altiplano under low temperature conditions (18-25 °C). Laboratory scale experiments were performed on the digestion of mixtures of llama, sheep and cow manure in a semi-continuous process using ten 2-L stainless steel digesters to determine the effects of organic loading rate (OLR) and the feed composition. The semi-continuous operation of mixture of llama-cow-sheep manure proved to be a reliable system, which could be operated with good stability. The results suggest that in a system digesting a mixture of llama-cow-sheep manure at low temperature (18-25 °C) the maximum OLR value is between 4 and 6 kg VS m3 d-1. The methane yields obtained in the mixture experiments were in the range 0.07-0.14 m3 kg-1 VS added, with a methane concentration in the gas of between 47 and 55%.

Idioma originalInglés
Páginas (desde-hasta)527-533
Número de páginas7
PublicaciónBiomass and Bioenergy
EstadoPublicada - mar. 2009

Nota bibliográfica

Funding Information:
This work was financially supported by the Swedish Agency for Research Cooperation (SAREC).


Profundice en los temas de investigación de 'Low temperature anaerobic digestion of mixtures of llama, cow and sheep manure for improved methane production'. En conjunto forman una huella única.

Citar esto