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Title: Treatment of an ECF bleaching effluent with white-rot fungi in an air-lift bioreactor
Authors: Souza, Érica Simplício de
Souza, João Vicente Braga de
Silva, Flávio T.
Paiva, Teresa Cristina Brazil de
Keywords: Bioconversion
Biological Water Treatment
Air-lift Bioreactors
Biological Treatment
Bleaching Effluent
Inorganic And Organic Materials
Low Molecular Weight
Molecular Mass Distributions
Trametes Versicolor
White Rot Fungi
Effluent Treatment
Chemical Oxygen Demand
Enzyme Activity
Industrial Waste
Microbial Activity
Pollutant Removal
Pulp And Paper Industry
Waste Treatment
Lentinula Edodes
Trametes Versicolor
Trametes Villosa
Issue Date: 2014
metadata.dc.publisher.journal: Environmental Earth Sciences
metadata.dc.relation.ispartof: Volume 72, Número 4, Pags. 1289-1294
Abstract: Pulp and paper mills utilise huge amount of natural resources, inorganic and organic materials along with large volume of water in different stages of paper manufacturing, resulting in a significant volume of effluents. The aim of this work was to investigate the treatment of a bleaching effluent [effluent chlorine free (ECF)] from the cellulose industry with white-rot fungi in an air-lift bioreactor. This effluent was submitted to the biological treatment with three white-rot fungi, and, every 24 h for 120 h, analytical tests were performed to analyse the quality parameters of treatment (COD, phenols, colour, pH). Before and after treatment, the effluent was analysed as its molecular mass distribution and absorptivity in the UV/VIS. Lentinus edodes, Trametes versicolor and Trametes villosa promoted similarly significant reductions in the following characteristics: (a) effluent colour (40-44 %), (b) total phenol (30-51 %) and (c) COD (37-43 %). The UV/visible spectrometry reading of the effluent after the fungi treatment showed a reduction in the absorbance of all wavelengths between 260 and 500 nm. The size exclusion HPLC profile of the effluent was modified, and the treatment promoted changes in the intensity of the peaks associated with compounds of high and low molecular weight. Phenoloxidases were produced during the treatment. T. versicolor produced the highest levels of laccase, and L. edodes was the only fungus that produced peroxidases. © 2014 Springer-Verlag Berlin Heidelberg.
metadata.dc.identifier.doi: 10.1007/s12665-014-3048-5
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