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Title:	Agricultural reuse of the digestate from low-cost tubular digesters in rural andean communities
Author:	Garfi, Marianna; Gelman, Pau; Comas Angelet, Jordi; Carrasco, W.; Ferrer Martí, Ivet
Other authors:	Universitat Politècnica de Catalunya. Departament d'Enginyeria Hidràulica, Marítima i Ambiental; Universitat Politècnica de Catalunya. Departament d'Enginyeria Agroalimentària i Biotecnologia; Universitat Politècnica de Catalunya. GEMMA - Grup d'Enginyeria i Microbiologia del Medi Ambient; Universitat Politècnica de Catalunya. GREA - Grup de Recerca d'Enginyeria Agro-Ambiental
Abstract:	This research aimed at assessing the properties of guinea pig manure digestate from low-cost tubular digesters for crops fertilization in rural Andean communities. To this end, field trials were carried out to evaluate the effect of the digestate on two common Andean crops: potato (Solanum tuberosum) and forage (Lolium multiflorum and Trifolium pratense L.). The potato yield (20–25 t ha−1) increased by 27.5% with digestate, by 15.1% with pre-compost and by 10.3% with the mixture, compared to the control. The forage yield (20–21 t ha−1) increased by 1.4% with digestate – 50% dose, and by 8.8% with digestate – 100% dose and digestate – 150% dose, compared to the control. The results suggest that the digestate is an appropriate substitute of manure pre-compost for potato fertilization. The results with forage indicate that it can be applied in a range of doses, according to the amount produced by the digester. Currently, manure is either used for cooking or as fertilizer. With low-cost tubular digesters implementation, it could be used to feed the digester, using the digestate for crops fertilization and biogas for cooking; improving household living conditions and protecting the environment. Since soil properties in rural Andean communities differ from experimental layouts, the effect of fertilizers should be re-evaluated in-situ in future research studies.
Abstract:	Peer Reviewed
Subject(s):	-Àrees temàtiques de la UPC::Desenvolupament humà i sostenible::Desenvolupament sostenible::Energia i sostenibilitat -Sustainable development -Anaerobic digestion -Biogas -Compost -Self-sufficient farming -Solid waste -Subsistence agriculture -Desenvolupament sostenible
Rights:	Attribution-NonCommercial-NoDerivs 3.0 Spain http://creativecommons.org/licenses/by-nc-nd/3.0/es/
Document type:	Article - Published version Article
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