Alvarez, R. & G. Lidén (2009) Low temperature anaerobic digestion of mixtures of llama, cow and sheep manure for improved methane production. Biomass and Bioenergy, 33, 527-533.
Alvarez, R., S. Villca & G. Lidén (2006) Biogas production from llama and cow manure at high altitude. Biomass and Bioenergy, 30, 66-75.
Martí-Herrero, J., R. Alvarez, R. Cespedes, M. R. Rojas, V. Conde, L. Aliaga, M. Balboa & S. Danov (2015) Cow, sheep and llama manure at psychrophilic anaerobic co-digestion with low cost tubular digesters in cold climate and high altitude. Bioresource Technology, 181, 238-246.
© Copyright Hill View Llamas, Frodsham
