Enhancement of biodegradation of 2,7-dichlorodibenzo-p-dioxin by addition of fungal culture filtrate

Abstract

The hydrophilicity of 2,7-dichlorodibenzo-p-dioxin (2,7-DCDD), a model dioxin compound, increased when incubated with the culture filtrates of several strains of fungi. The possibility that the addition of these filtrates could enhance the biodegradation of 2,7-DCDD by the white-rot basidiomycetous fungus Phanerochaete sordida YK-624 was examined. The decrease of 2,7-DCDD after 3 weeks incubation in a YK-624 culture containing these filtrates was greater (30%) than that in the culture of YK-624 alone (15%). This is the first report describing the enhancement of dioxin decrease by the addition of a fungal filtrate.