Utilização de basidiomicetos ligninoliticos na degradação de corantes industriais e no tratamento do efluente de uma industria de alimentos

AUTOR(ES)
DATA DE PUBLICAÇÃO

2000

RESUMO

This work describes the degradative action of two basidiomycetes, Pleurotus sajor caju (020) and Phanerochaete chrysosporium ATCC 24725, on the following natural or synthetic dyes: a) hydro-soluble annatto (norbixin) b) cannirn (carminic acid); c) a combination of these with the fat-soluble annatto (bixin); d) new coccine; e) orange G; f) chrorne azurol S; g) a combination of these synthetic dyes; h) effluent samples :ITomthe natural dye industry. In addition, the ligninolytic system involved in these processes and the reduction in the chemical oxygen demand (COD) ofthe effluent and ofthe cultivation medium containing dyes were studied. The fungi were grown in two different agitated media: 0.5% malt extract, containing 100 rng/L of different dyes, and in the raw industrial effluent. The cultivation broths were analysed for pH mycelium weight and COD on the 2nd, 4th,6th,8th,10th and 12th days of growth. The decolorization of the culture media and effluent was verified using spectrophotometry, in the wavelength range 200 to 800 nm, and the degradation ofthe dyes was investigated using high performance liquid chromatography (HPLC). All the dyes were decolorised to some extent by the fungi studied with the efficiency of the color removal varying :ITom50 to 100%. Pleurotus sajor caju (020) was capable of efficiently decolorising the effluent and the natural and synthetic dyes, individually or in combination. Effluent decolorization was not observed with Phanerochaete chrysosporium, but this fungus showed an excellent decolorization action on the natural dyes individually and on the synthetic dyes individually or in combination

ASSUNTO(S)

biodegradação corantes pleurotus ostreatus

ACESSO AO ARTIGO

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