Anaerobic digestion of coffee pulp. A pilot-scale study in Mexico

Farinet Jean-Luc, Pommarès P.. 1999. Anaerobic digestion of coffee pulp. A pilot-scale study in Mexico. In : Mata Alvarez J. (ed.), Tilche A. (ed.), Cecchi F. (ed.); IAWQ. International symposium on anaerobic digestion of solid waste (2 ISAD-SW). 2. Poster presentations = [ Symposium international sur la digestion anaérobique de déchet solide (2 ISAD-SW). 2. Pré. Barcelona : IAWQ, pp. 129-132. International Symposium on Anaerobic Digestion of Solid Waste. ISAD-SW. 2, Barcelone, Espagne, 15 June 1999/17 June 1999.

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Autre titre : Digestion anaérobique de la pulpe de café. Etude pilote au Mexique

Abstract : he coffee processing industry produces large amounts of coffee pulp which are not used and pose a problem for the environment. Anaerobic digestion of this organic waste was tested in a pilot-scale unit set up in Mexico. The composition and low pH of coffee pulp usually result in excess acid production during anaerobic digestion using completely mixed reactors. The TRANSPAILLE plug flow digester solved this problem of acidification for medium volatile solids (VS) loading rates of below 3.6 kg The methane yield reached 0.315 VS eliminated-1 with 44% VS reduction (w/w). After 50 days in a maturating pit, the final compost mass represented only 24% of the initial mass of coffee pulp. Energy-saving calculations show that biogas from coffee pulp can contribute 25-30% of the heat needed to dry coffee beans. The end compost can be used as an organic fertilizer for coffee plantations. (Résumé d'auteur)

Mots-clés Agrovoc : Pulpe de café, Industrie du café, Traitement anaérobique, Projet pilote, Digesteur, Biogaz

Mots-clés géographiques Agrovoc : Mexique

Classification Agris : Q70 - Processing of agricultural wastes

Auteurs et affiliations

  • Farinet Jean-Luc, CIRAD-CA-GEC (FRA)
  • Pommarès P.

Autres liens de la publication

Source : Cirad - Agritrop (

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