Abstract

PALACIO-ARANGO, María A. et al. Evaluation of capacity of tannin degradation with microorganisms isolated from a tannery effluent in Copacabana, Antioquia. Actu Biol [online]. 2018, vol.40, n.108, pp.17-23. ISSN 0304-3584.  https://doi.org/10.17533/udea.acbi.v40n108a02.

Tannins are the phenolic compounds most abundant in nature, used as raw material in several industrial processes like tanning leather. Tannic acid is a hydrolyzable tannin used in tannery, which can be degraded by a biological enzymatic hydrolysis using tannase. To evaluate the capacity and optimal conditions of tannin degradation using microorganisms isolated from a tannery, we used an enrichment technique and plate culture. We obtained the isolation of tannin-resistant bacteria, that were subjected to minimum inhibitory concentration tests (MIC), retaining 0,4% v/v tannic acid. Finally, Bacillus licheniformis was identified as the bacteria with the major capacity of degradation in growth conditions of pH 7, 35 °C and 90 r. p. m.

Keywords : tannic acid; Bacillus licheniformis; tannery; biodegradation; tannase; tannins.

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