Biodegradation of phenol by free and encapsulated cells of a new Aspergillus sp. isolated from a contaminated site in southern Brazil

Passos, Cátia Tavares dos; Michelon, Mariano; Burkert, Janaina Fernandes de Medeiros; Kalil, Susana Juliano; Burkert, Carlos André Veiga


The aim of this study was to compare the biodegradation performance of phenol by using free and encapsulated cells of a new Aspergillus sp. strain isolated from a crude oil contaminated soil in southern Brazil. In batch cultures, maximum degradation rates were not significantly different between free and encapsulated cells, but a decrease in adaptation time for encapsulated ones was observed. This fact indicates the presence of a microenvironment that is more favorable to biodegradation inside encapsulated cells, because of the protector effect of gel matrix, which reduces abiotic stress. Encapsulated filamentous fungus Aspergillus sp. LEBM2 showed a promising application in bioaugmentation processes, reaching maximum phenol degradation rate of 7.71 ± 0.21 mg/l.h for an initial phenol concentration of 500 mg/l.

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  • EQA - Artigos Publicados em Periódicos