Simultaneous detoxification and decolorization of molasses spent wash by the immobilized white-rot fungus Flavodon flavus isolated from a marine habitat

Raghukumar, Chandralata; Mohandass, Chellandi; Kamat, S.Y.; Shailaja, M.S.

doi:10.1016/j.enzmictec.2004.04.010

Cited by 106 publications

(57 citation statements)

References 17 publications

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“…Microbial decolorization is an environment-friendly and cost competitive alternative to chemical decomposition process [32]. Several kinds of microorganism such as fungi (Penicillium decumbens, Aspergillus sp., Aspergillus niger, Flavadon flavus) [12,19,38,42], white rot fungi (Phanerochaete sp., Phanerochaete chrysosporium, Trametes versicolor, Coriolus sp.,) [6,16,24], yeast (Citeromyces sp.) [47] and bacteria (Bacillus sp., Pseudomonas sp., acetogenic bacteria) [9,13,18,47] have been reported regarding their abilities to remove melanoidins.…”

Section: Introductionmentioning

confidence: 99%

Decolorization of synthetic melanoidins-containing wastewater by a bacterial consortium

Jiranuntipon

Chareonpornwattana

Damronglerd

et al. 2008

J Ind Microbiol Biotechnol

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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).

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Section: Introductionmentioning

confidence: 99%

Decolorization of synthetic melanoidins-containing wastewater by a bacterial consortium

Jiranuntipon

Chareonpornwattana

Damronglerd

et al. 2008

J Ind Microbiol Biotechnol

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“…Specific microorganism, especially white rot fungi have been found capable of degrading melanoidins-type compounds [8]. The shortcomings of these methods include instable decolorization efficiency, operational difficulty and occasional formation of hazardous by-products/secondary pollutants.…”

Section: Introductionmentioning

confidence: 99%

Variables affecting melanoidins removal from molasses wastewater by coagulation/flocculation

Liang

Wang

Zhou

et al. 2009

Separation and Purification Technology

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“…To date, bacterial decolourization of molasses wastewater has been reported by many researchers 1,6,21,22 . It was established that bacteria, especially pure culture, displayed a limited capability to decolourize melanoidins because the toxicity of metabolites which were formed and accumulated during decolourization, thereby compromised the efficiency of bacteria 3 . Therefore, the application of bacterial consortium might be a more promising strategy for decolourization of molasses wastewater by biological treatment since each bacterial member of consortium might have different metabolic activities leading to effective decolourization against a broad spectrum of structurally diverse melanoidins 35,36 .…”

Section: Time Course Of Growth and Decolourization Activity Of The Bamentioning

confidence: 99%

“…This adversely affects many aquatic plants and animals. Its disposal into soil is equally detrimental, causing inhibition of seed germination and depletion of vegetation by acidified soil 3 . Several alcohol distillery industries in Thailand have attempted to treat molasses wastewater by anaerobic methods such as methane fermentation and using a waste stabilization pond system followed by aerobic treatment using an activated sludge system, aerated lagoon, or oxidation pond 4 .…”

Section: Introductionmentioning

confidence: 99%

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Jiranuntipon¹,

Délia²,

Albasi³

et al. 2009

ScienceAsia

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ABSTRACT:The effluent from sugarcane molasses based distilleries leads to environmental pollution due to its large volume and the presence of dark brown coloured compounds. In this study, a bacterial consortium isolated from waterfall sediments was selected as a molasses-decolourizing agent. The effect of culture conditions and medium composition on decolourization activity and growth of the bacterial consortium was investigated. The bacterial consortium was able to grow and decolourize molasses wastewater under facultative and anaerobic conditions in general. Aerobic culture conditions at pH 7 and 9 in molasses wastewater containing LB medium exhibited high growth but poor decolourization. The addition of a supplementary nutrient source in molasses wastewater medium significantly increased the decolourization activity of the bacterial consortium by up to 26.5% within 48 h under anaerobic conditions. Comparison of 16S rDNA sequences indicated that the bacterial consortium which showed decolourization activity under aerobic conditions consisted of Acinetobacter sp., Pseudomonas sp., Comamonas sp., Klebsiella oxytoca, Serratia marcescens and unidentified bacteria, whereas, the anaerobically enriched consortium consisted of Pseudomonas sp., Klebsiella oxytoca, Bacillus cereus and Citrobacter farmeri, a mercury-resistant bacterium, and an unidentified bacterium. Denaturing gradient gel electrophoresis profiles indicated that the community structures of aerobically and anaerobically enriched bacterial consortium were different.

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Simultaneous detoxification and decolorization of molasses spent wash by the immobilized white-rot fungus Flavodon flavus isolated from a marine habitat

Cited by 106 publications

References 17 publications

Decolorization of synthetic melanoidins-containing wastewater by a bacterial consortium

Decolorization of synthetic melanoidins-containing wastewater by a bacterial consortium

Variables affecting melanoidins removal from molasses wastewater by coagulation/flocculation

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