The current study was aimed to evaluate the industrial effluents biodegradation potential of an
indigenous microorganism which reduced water pollution caused by these effluents. In the present study
biodegradation of three textile industrial effluents was performed with locally isolated brown rot fungi named
Coniophora puteana IEBL-1. Response Surface Methodology (RSM) was employed under Box Bhenken Design
(BBD) for the optimization of physical and nutritional parameters for maximum biodegradation. Quality of
treated effluents was checked by study of BOD, COD and analysis through HPLC. Three ligninolytic enzymes
named lignin peroxidase, manganese peroxidase and laccase were also studied during the biodegradation
process. The results showed that there was more than 85% biodegradation achieved for all three effluents with
decrease in Biological Oxygen Demand (BOD) and Chemical Oxygen Demand (COD) below the recommended
values for industrial effluent i.e. 80 mg/L for BOD and 220 mg/L for COD after optimization of nutritional
parameters in the second stage. Analysis of samples through HPLC revealed the formation of less toxic
diphenylamine, 3-methyldiphenylamine and N-methylaniline after treatment. The ligninolytic enzymes assays
confirmed the role of lignin peroxidase (LiP), manganese peroxidase (MnP) and laccase in biodegradation
process. Lignin peroxidase with higher activity has more contribution in biodegradation of effluents under
study. It can be concluded through the results that Coniophora buteana IEBL-1 is a potential fungus for the
treatment of industrial effluents.
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