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Decolorization of synthetic melanoidins-containing wastewater by a bacterial consortium

Jiranuntipon, Suhuttaya and Chareonpornwattana, Supat and Damronglerd, Somsak and Albasi, Claire and Délia, Marie-Line Decolorization of synthetic melanoidins-containing wastewater by a bacterial consortium. (2008) Journal of Industrial Microbiology and Biotechnology, 3 (11). 1313-1321. ISSN 1476-5535

(Document in English)

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Official URL: http://dx.doi.org/10.1007/s10295-008-0413-y


The presence of melanoidins in molasses wastewater leads to water pollution both due to its dark brown color and its COD contents. In this study, a bacterial consortium isolated from waterfall sediment was tested for its decolorization. The identification of culturable bacteria by 16S rDNA based approach showed that the consortium composed of Klebsiella oxytoca, Serratia mercescens, Citrobacter sp. and unknown bacterium. In the context of academic study, prevention on the difficulties of providing effluent as well as its variations in compositions, several synthetic media prepared with respect to color and COD contents based on analysis of molasses wastewater, i.e., Viandox sauce (13.5% v/v), caramel (30% w/v), beet molasses wastewater (41.5% v/v) and sugarcane molasses wastewater (20% v/v) were used for decolorization using consortium with color removal 9.5, 1.13, 8.02 and 17.5%, respectively, within 2 days. However, Viandox sauce was retained for further study. The effect of initial pH and Viandox concentration on decolorization and growth of bacterial consortium were further determined. The highest decolorization of 18.3% was achieved at pH 4 after 2 day of incubation. Experiments on fresh or used medium and used or fresh bacterial cells, led to conclusion that the limitation of decolorization was due to nutritional deficiency. The effect of aeration on decolorization was also carried out in 2 L laboratory-scale suspended cell bioreactor. The maximum decolorization was 19.3% with aeration at KLa = 2.5836 h-1 (0.1 vvm).

Item Type:Article
Additional Information:Thanks to SpringerLink editor. The definitive version is available at http://www.springerlink.com The original PDF of the article can be found at Journal of Industrial Microbiology and Biotechnology website : http://www.springerlink.com/content/100967/?p=1a255278fa5e4b1fb141faa0ecf0e4c2&pi=0
HAL Id:hal-03577286
Audience (journal):International peer-reviewed journal
Uncontrolled Keywords:
Institution:Université de Toulouse > Institut National Polytechnique de Toulouse - Toulouse INP (FRANCE)
Université de Toulouse > Université Toulouse III - Paul Sabatier - UT3 (FRANCE)
French research institutions > Centre National de la Recherche Scientifique - CNRS (FRANCE)
Other partners > Chulalongkorn University (THAILAND)
Laboratory name:
Deposited On:29 Jun 2009 12:15

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