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Pastos y Forrajes

versión impresa ISSN 0864-0394

Resumen

CEPERO, L et al. Production of biogas and biofertilizers from biodigester effluents. Pastos y Forrajes [online]. 2012, vol.35, n.2, pp.219-226. ISSN 0864-0394.

One of the research and technological innovation processes which are developed within the project «Biomass as renewable energy source for rural areas» (BIOMAS-CUBA) is related to biogas and biofertilizer production from biodigester effluents, in agroenergy farms, where food and energy are produced, in an integrated way. The technologies selected for constructing anaerobic biodigesters have been: fixed dome (Chinese model), plastic tube or polyethylene with continuous flow (Taiwan type) and anaerobic lagoon covered with a high density polyethylene geomembrane. From these technologies 69 biodigesters were constructed or repaired to a lesser extent-, in farms from the provinces Matanzas, Sancti Spiritus and Las Tunas, at the Experimental Station «Indio Hatuey», in the mountain community Magueyal (Santiago de Cuba), in a pig production facility from Las Tunas and a livestock production farm belonging to the Ministry of Interior, in Jovellanos (Matanzas province). These 69 biodigesters comprised a total digestion capacity of 1 665 m3 and generated productions of 600 060 m3 of biogas, which were used for cooking food and feedstuffs, electricity generation and brick firing; as well as 2 601 t of biofertilizers, used for improving the fertility of 1 830 ha of soils; in addition, they allow eliminating the contamination produced by cattle and pig dung in the productive scenarios, which generates a positive environmental impact. The installation was carried out of 52 bioproduct production plants from biodigester effluents, enriched with native microorganisms, which are used in animal and plant health, crop nutrition, elimination of bad odors in livestock production facilities, bioremediation of lagoons contaminated with organic residues and in bioceramic filters

Palabras clave : Biogas; organic fertilizers.

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