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Palabras clave: biogás, purificación, compresión, agua a presión, óxido de calcio. Biogas purification using water under pressure, calcium oxide and charcoal. Abstract Biodigesters are frequently used in Costa Rica as a way to comply with water discharge regulations, as well as to generate biogas and fertilizer. However, when there is biogas surplus, it is burned directly instead of being purified and compressed. This motivated the design and construction of a portable equipment that eliminatesfatcat:nky3ednodvepnl7r2mjybmtqh4