Decolourization of synthetic dyes by Trametes hirsuta in expanded-bed reactors.
The present paper studies the decolourization of different synthetic dyes (Indigo Carmine, Bromophenol Blue, Methyl Orange and Poly R-478) by the white-rot fungus Trametes hirsuta at bioreactor scale under solid-state conditions, operating with ground orange peelings as a support-substrate. Dye decolourization was performed in both batch and continuous mode. Batch cultivation led to high decolourization percentages in a short time (100% for Indigo Carmine in 3h and 85% for Bromophenol Blue in 7 h). As for continuous cultivation, different hydraulic retention times (HRT) were studied (0.8, 1, 1.5 and 3d). The highest decolourization percentages were obtained operating at a HRT of 3d, especially for the dyes Methyl Orange and Poly R-478 (81.4% and 46.9%, respectively). This is a very interesting result, since there are few studies dealing with the continuous decolourization of dyes at bioreactor scale by fungal laccases.
Couto
S Rodríguez
SR
Department of Chemical Engineering, University of Vigo, 36200 Vigo, Spain. susana.rodriguez@urv.net
Rosales
E
E
Sanromán
M A A
MA
D001673:Biodegradation, Environmental; D019149:Bioreactors; D003116:Color; D004396:Coloring Agents / Q000032:analysis*; D020072:Polyporales / Q000254:growth & development*; D013783:Textile Industry; D014874:Water Pollutants, Chemical / Q000032:analysis*; D018508:Water Purification / Q000379:methods*
D004396:Coloring Agents; D014874:Water Pollutants, Chemical