Extracellular laccase production and phenolic degradation by an olive mill wastewater isolate





Acinetobacter REY, Biodegradation, Extracellular laccase, Olive mill waste water, Phenolic compounds


Olive mill wastewater (OMWW) presents a challenge to the control of effluents due to the presence of a high organic load, antimicrobial agents (monomeric-polymeric phenols, volatile acids, polyalcohols, and tannins), salinity and acidity. In this study, the production of extracellular laccase, monomeric or polymeric phenol, from an OMWW isolate based on its ability to biodegrade phenols and gallic acid as a model of phenolic compounds in OMWW was investigated. Phylogenetic analysis of the 16S RNA gene sequences identified the bacterial isolate (Acinetobacter REY) as being closest to Acinetobacter pittii. This isolate exhibited a constitutive production of extracellular laccase with an activity of 1.5 and 1.3 U ml/L when supplemented with the inducers CuSO4 and CuSO4+phenols, respectively. Batch experiments containing minimal media supplemented with phenols or gallic acid as the sole carbon and energy source were performed in order to characterize their phenolic biodegradability. Acinetobacter REY was capable of biodegrading up to 200 mg/L of phenols and gallic acid both after 10 h and 72 h, respectively.


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How to Cite

Kumar R, Raizner Y, Kruh LI, Menashe O, Azaizeh H, Kapur S, Kurzbaum E. Extracellular laccase production and phenolic degradation by an olive mill wastewater isolate. grasasaceites [Internet]. 2018Mar.30 [cited 2022Dec.4];69(1):e231. Available from: https://grasasyaceites.revistas.csic.es/index.php/grasasyaceites/article/view/1698