Isolation and identification of a native microbial consortium for the coffee pulp degradation above 2000 masl




Pulp and mucilage constitute the most abundant by-products of the processing of coffee and inadequate handling produces high-rates of pollution. Considering that in nature there is a large number of cellulolytic microorganisms which can intervene in the degradation of coffee pulp, the inclusion of a native microbial cellulolytic consortium was assessed. The sample for insulation consisted of coffee pulp and soil from a humid forest at more than 2,000 m.a.s.l. Nutrient agar was used as a means of insulation for bacteria, and malt agar for fungi, supplemented with 50% soil extract and 1% carboxylmethylcellulose. This achieved the isolation of 118 strains of bacteria and 114 of fungi. Cellulolytic activity was established using the filter paper test, assessing and selecting only those that presented higher glucose production, among them 12 strains of fungi and 11 strains of bacteria. To attain the microbial consortium, randomized blends were performed for both fungi and bacteria, again assessing the production of glucose. The bacterial consortium was made up of Ochrobactrum pseudogrignonense, Paenibacillus lauruscon and Bacillus xiamenensis and the fungal consortium by Fusarium sp., Penicillum sp., Cylindrocarpon sp. The optimal treatment achieved a complete degradation of the pulp in 28 days, that would contribute to the recovery and conservation of the coffee ecosystem. Main interpretation was wet environment at more 2,000 m.a.s.l. is still good for coffee compost but different bacterial and fungi consortium were found supporting other recent work done with one type of consortium.

Key words: Carboxymethylcellulose (CMC); Cellulose; Coffee pulp; Degradation; Microbial consortium; Meters above sea level (masl).


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How to Cite

ARTEAGA-CUBA, M. .; DILAS-JIMENEZ, J. O.; DÍAZ, N. V.; MIRANDA, O. C. . C.; SANTILLÁN, S. M. T.; GARCÍA, J. E. O.; VASSALLO, C. M. . Isolation and identification of a native microbial consortium for the coffee pulp degradation above 2000 masl. Coffee Science - ISSN 1984-3909, [S. l.], v. 16, p. e161810, 2021. DOI: 10.25186/.v16i.1810. Disponível em: Acesso em: 24 jun. 2022.