WP2 Wastewater Treatment: Analysis, Fate and Removal of Emerging Contaminants
Wednesday, 16 November 2005: 8:00 AM - 6:30 PM in Exhibit Hall

(YES-1117-807507) Decolorization and Detoxification of the Textile Dye by White Rot Fungal Pellets.

Yesilada, O¹, Cing, S², Birhanli, E³, Hamamci, D⁴, Apohan, E ⁵, Ozmen, N⁶, ¹ Inonu University, Malatya, Turkey² Inonu University, Malatya, Turkey³ Inonu University, Malatya, Turkey⁴ Inonu University, Malatya, Turkey⁵ Inonu University, Malatya, Turkey⁶ Inonu University, Malatya, Turkey

ABSTRACT- This study was undertaken for the possibility of application of fungal pellets for the biotechnological treatment in textile industry. Relatively few studies have been carried out with white rot fungal pellets in decolorizing dyes. The results showed that, with more than 90 % of color removed during the first 24 h of treatment, pellets have high decolorization ability. Furthermore, an optimization study for the decolorization conditions and the length of decolorizing activity showed that pellets bear a high and stable decolorization activity in repeated batch experiments. Antimicrobial activity (toxicity) experiments before decolorization showed that Astrazone black dye was toxic. After decolorization its antimicrobial activity decreased. The decolorization activity and stability of pellets of Phanerochaete chrysosporium and Trametes versicolor were also tested in repeated batch experiments and high and stable dye decolorization activity were also detected with these fungal pellets. Laccase activity of fungal pellets during repeatedly used showed that not only laccase but also other systems such as Mn peroxidase and ligninase could play a role in dye decolorization. Our results showed that white rot fungi could effectively be used as an alternative to traditional physicochemical processes. The use of pellets in wastewater decolorization may offer some advantages as reduced sensitivity to dyes and adverse conditions and it could be advantageous to integrate these kinds of biodecolorization processes prior to conventional ones.

Key words: Bioremediation, Detoxification, Textile dye, White rot fungi