Screening of filamentous fungi for the decolorization of a commercial reactive dye

Abstract

The aim of this work is to verify the ability of 19 isolates of 13 different fungal species to decolorize the reactive dye blue-BF-R. The isolates of Pleurotus pulmonarius, P. ostreatus, P. ëous, P. citrinopileatus, Lentinus edodes, Phanerochaete chrysosporium, Schizophyllum commune, Agaricus blazei, Ganoderma sp. and four isolates obtained from textile effluent were evaluated in minimum liquid medium. In addition, seven of them were also evaluated on solid medium, and both media were both added 0.5 g dye/l. All isolates evaluated on solid medium decolorized the dye. The isolates Phanerochaete chrysosporium CCB478 and Lentinus edodes CCB047 were the ones that presented the fastest and slowest growth, respectively. Despite the isolate of the textile effluent had grown on solid medium, it did not decolorize the dye. All the isolates of the genus Pleurotus, except the isolate Pleurotus ëous CCB440, decolorized the dye in liquid medium. They presented decolorization percentage ranging from 39% to 51%. The absorbance ratio (Abs590/Abs455) of the culture medium inoculated with these isolates decreased throughout the experiment indicating the fungal dye degradation. The others presented decolorization percent below 8%. The isolates of Pleurotus, except the isolate Pleurotus ëous CCB440, were able to decolorize and to degrade the commercial reactive dye blue-BF-R. The results indicate their potential to be used in the treatment of effluents containing this dye.

Optimization of Culture Conditions for Enhanced Decolorization of Cibacron Red FN-2BL by Schizophyllum commune IBL-6

“…This remarkable decrease in the dye decolorization on the eighth day is probably due to the formation of metabolites, and this decreasing trend continued until the tenth day. Different fungi have different decolorization potential on chemically different dyes, and screening for ligninolytic fungi for dye decolorization must be conducted under conditions as similar as possible [9,20,21]. The first sign of fungal mycelia growth was seen 24 h after inoculation, and that medium was completely decolorized by Lentinula edodes within 6 days [11].…”

“…Although decolorization is a challenging process to the textile industry, the great potential of microbial decolorizing can be adopted as an effective tool. In the recent past, there has been an intensive research on bioremediation of dyes, and the use of ligninolytic fungi is turning into a promising alternative to replace or supplement present treatment processes [8,9,10].…”

Novel salt and alkali tolerant neotropical basidiomycetes for dye decolorisation in simulated textile effluent

“…They originate from basidiocarps isolated from different Brazilian ecosystems, including tropical forests. Earlier studies have identified Brazilian strains able to degrade different textile dyes (Okino et al 2001;Balan and Monteiro 2001;Dos Santos et al 2004;Machado et al 2005;. In these studies-as well as in most other studies evaluating the capacity of basidiomycetes to degrade textile dye-stuffs-the authors employed culture conditions proper to the development of fungi.…”

Decolorization of different textile dyes by Penicillium simplicissimum and toxicity evaluation after fungal treatment

“…Therefore, in recent years, there have been intensive researches on fungal decolorization of textile wastewater. The use of fungi is a promising alternative to replace or supplement current treatments (8,13,18).…”

“…Several fungi are capable of mineralizing pollutant compounds through their highly oxidative and non-specific ligninolytic enzymes, which are also responsible for the decolorization and degradation of many different dyes (13).…”