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Psychrophilic anaerobic digestion of guinea pig manure in low-cost tubular digesters at high altitude
Garfi, Marianna; Ferrer Martí, Laia; Villegas, V.; Ferrer Martí, Ivet
Universitat Politècnica de Catalunya. Departament d'Enginyeria Hidràulica, Marítima i Ambiental; Universitat Politècnica de Catalunya. Departament d'Enginyeria Mecànica; Universitat Politècnica de Catalunya. GEMMA - Grup d'Enginyeria i Microbiologia del Medi Ambient; Universitat Politècnica de Catalunya. EOLI - Enginyeria d´Organització i Logística
Guinea pig is one of the most common livestock in rural communities of the Andes. The aim of this research was to study the anaerobic digestion of guinea pig manure in low-cost unheated tubular digesters at high altitude. To this end, the performance of two pilot digesters was monitored during 7 months; and two greenhouse designs were compared. In the dome roof digester the temperature and biogas production were significantly higher than in the shed roof digester. However, the biogas production rate was low (0.04 View the MathML sourcembiogas3View the MathML sourcemdigester-3 d−1), which is attributed to the low organic loading rate (0.6 kgVS View the MathML sourcemdigester-3 d−1) and temperature (23 °C) of the system, among other factors. In a preliminary fertilization study, the potato yield per hectare was increased by 100% using the effluent as biofertilizer. Improving manure management techniques, increasing the organic loading rate and co digesting other substrates may be considered to enhance the process.
Peer Reviewed
Àrees temàtiques de la UPC::Desenvolupament humà i sostenible::Desenvolupament sostenible::Energia i sostenibilitat
Renewable energy sources
Energies renovables
Attribution-NonCommercial-NoDerivs 3.0 Spain

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