An Evaluation Of Organopollutant
Biodegradation By Some Selected
White Rot Fungi: An Overview
Author(s)
M. Tekere, J. S. Read & B. Mattiasson
Abstract
An evaluation of indigenous subtropical white rot fungi producing the
ligninolytic enzymes laccase and manganese peroxidase only showed that the
fungi could degrade synthetic dyes, PAHs and organochlorine pesticides.
Biodegradation of the polymeric dye Poly 478 saved as a good screening
indicator for organopollutant degradation by the fungi and based on Poly R478,
the indigenous fungi; Trametes versicolor, Trametes cingulata, Trametes pocas
and unidentified strain DSPM95 were selected as high degraders from 11
screened fungi. PAH biodegradation was evaluated both in batch and continuous
culture bioreactors. The degradation of PAHs at an initial concentration of 20
ppm each in static batch cultures over 31 days showed that + 60% fluorene,
+40% phenanthrene, +42% anthracene and 3–11% of benzo(a)anthracene and
pyrene were degraded. Biodegradation experiments using extra-cellular culture
fluid demonstrated that the extracellular enzyme system of the fungi was
responsible also for the biodegradation of the PAHs. Studies on PAH
biodegradation by the isolate DSPM95 in packed and suspended carrier
continuous bioreactors also showed that the fungi could degrade most of the
PAH fed continuously at a concentration of 1 ppm over a period of at least 31
days.
Keywords: white rot fungi, ligninolytic enzymes, polyaromatic hydrocarbons,
synthetic dyes, organochlorine, biodegradation, bioremediation, manganese
peroxidase, laccase.
Keywords
white rot fungi, ligninolytic enzymes, polyaromatic hydrocarbons,
synthetic dyes, organochlorine, biodegradation, bioremediation, manganese
peroxidase, laccase
Related Book
Other papers in this volume
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