Journal
JOURNAL OF CHEMICAL TECHNOLOGY AND BIOTECHNOLOGY
Volume 83, Issue 12, Pages 1602-1608Publisher
WILEY
DOI: 10.1002/jctb.1954
Keywords
Trametes versicolor; pulp effluent; sequential batch reactor; ligninolytic enzymes
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Funding
- Fundacao para Ciencia e Tecnologia (FCT) Portugal [POCTI/EQU/48489/2002, SFRH/BPD/22697/2005]
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BACKGROUND: A sequential batch reactor (SBR) was used for eucalypt kraft pulp effluent treatment with Trametes versicolor. A 2(3) full factorial design and response surface methodology were applied to optimise the batch fermentation conditions. Effluent concentration, culture medium and inoculum age were the factors selected for this study in order to optimise the reduction of chemical oxygen demand (COD). RESULTS: The presence of Trametes Defined Medium (TDM) in the fermentation was required to obtain a significant COD reduction. Experiments in the batch reactor confirmed, in general, the predicted results of optimisation developed from Erlenmeyer batch assays. The T. versicolor culture remained active during 42 days of study in the SBR, providing approximately 80%, of COD reduction. CONCLUSION: Trametes versicolor may be considered as very promising for the biological treatment of effluents from kraft pulp mills in an SBR system instead of the activated sludge mixed cultures traditionally used. (C) 2008 Society of Chemical Industry
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