Potential role of oxidative exoenzymes of the extremophilic fungus Pestalotiopsis palmarum BM‐04 in biotransformation of extra‐heavy crude oil

Abstract:

Large amount of drilling waste associated with the expansion of the Orinoco Oil Belt (OOB), the biggest proven reserve of extra‐heavy crude oil (EHCO) worldwide, is usually impregnated with EHCO and highly salinized water‐based drilling fluids. Oxidative exoenzymes (OE) of the lignin‐degrading enzyme system (LDS) of fungi catalyse the oxidation of a wide range of toxic pollutants. However, very little evidences on fungal degradation or biotransformation of EHCO have been reported, which contain high amounts of asphaltenes and its biodegradation rate is very limited. The aims of this work were to study the ability of Pestalotiopsis palmarum BM‐04 to synthesize OE, its potential to biotransform EHCO and to survive in extreme environmental conditions. Enzymatic studies of the LDS showed the ability of this fungus to overproduce high amounts of laccase (LACp) in presence of wheat bran or lignin peroxidase …

Año de publicación:

2013

Keywords:

Fuente:

google