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Journal of Spectroscopy
Volume 2014, Article ID 237346, 4 pages
http://dx.doi.org/10.1155/2014/237346
Research Article

Insights into the Synergistic Effect of Fungi and Bacteria for Reactive Red Decolorization

Key Lab of Groundwater Resources and Environment, Jilin University, Ministry of Education, Changchun 130021, China

Received 29 May 2014; Accepted 3 July 2014; Published 10 August 2014

Academic Editor: Qingrui Zhang

Copyright © 2014 Dandan Zhou et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

Bacterial contamination is a prevalent problem in fungal dye wastewater decolorization that prevents the development of this technology in practical engineering. New insight into the relationship between fungi and bacteria is given in terms of settleability, bioadsorption, and biodegradation, which all confirm their synergistic effect. Sterilization is implied to be not the only mechanism for fungi decolorization. When the fungi and bacteria isolated from the activated sludge were cocultured, fungi removed more than 70% of the reactive red through sole bioadsorption in 5 min and enhanced the settleability of the bacteria group from 7.7 to 18.4 in the aggregation index. Subsequently, the bacteria played a more significant role in dye biodegradation according to the ultraviolet-visible spectrum analysis. They further enhanced the decolorization efficiency to over 80% when cocultured with fungi. Therefore, the advanced bioadsorption and settleability of fungi, combined with the good dye biodegradation ability of bacteria, results in the synergistic effect of the coculture microorganisms.