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Activity and Elution Profile of Laccase During Biological Decolorization and Dephenolization of Olive Mill Wastewater by Albino A. Dias; Rui M. Bezerra; A.Nazaré Pereira is a Engineering article available to read on EtoBox.

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The performance and enzymatic strategy exhibited by basidiomycete Euc-1, a laccase producing strain, was investigated during the biodegradation of olive mill wastewater (OMW). This strain yielded better decolorization of solidified OMW than Phanerochaete chrysosporium and removed 90% of phenols (initial concentration 1⁄4 800 mg l À1 ), 73% of color (initial A 465 1⁄4 4:4), and 45% of chemical oxygen demand in batch cultures containing OMW. Since partial phenol removal occurred before the detection of enzymatic activity, no plausible correlation could be established between them. In contrast, decolorization occurred only after the detection of laccase activity and coincided with its production over time. Two laccase fractions (Lac1 and Lac2) were separated by chromatography. OMW strongly induced Lac2 that was almost absent in defined liquid medium. Furthermore, Lac2 was the main laccase fraction in the presence of OMW. This study pointed out that basidiomycete Euc-1 and its ligninolytic system could be a useful tool for the bioremediation of wastewater generated in the process of olive oil extraction.

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Author

Albino A. Dias; Rui M. Bezerra; A.Nazaré Pereira

Publisher

Elsevier Science; Elsevier ; Elsevier BV (ISSN 0960-8524)

Published

2004

Language

EN

Field

Engineering (Physical Sciences)