Published in Scientific Bulletin. Series F. Biotechnologies, Vol. XXIII
Written by Mioara Ancuța DUMITRU, Ștefana JURCOANE, Daniela BĂLAN, Oana SICUIA
Ecological biotechnology reduces the negative impact of industrial activities to the environment, by different bioremediation processes. Such biotechnological measures are non-polluting and environmentally safe. The use of specific microorganisms for the degradation of leather residues is an ecological alternative and an ecological tool for bioremediation. The aim of this study was to isolate some microbial strain capable to accelerate the degradation of leather waste, reducing the pollution that causes environmental damage. Three isolated bacterial strains, DA7, DA10 and DA13, were selected for their ability to produce extracellular proteases. These strains were identified with the Biolog-Microbial Identification System as Brevundimonas diminuta, Bacillus cereus/thuringiensis and Bacillus cereus, respectively. Studies revealed that the best enzymatic activity is higher after 120 hours cultivation, at 35oC temperature, 135 rpm and pH 7.0 units.
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