Decolorization of reactive dyes by mixed cultures isolated from textile effluent under anaerobic conditions

Çetin, Demet; Dönmez, Gönül

doi:10.1016/j.enzmictec.2005.08.020

Cited by 77 publications

(40 citation statements)

References 21 publications

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“…Decolorization rate of DO-16 was found to decrease substantially at 40°C and 45°C exhibiting 46 and 29 % rate. This inhibition is most likely due to deactivation of enzymes responsible for decolorization or loss of cell viability (Panswad and Luangdilok 2000;Cetin and Donmez 2006). Similar effect of temperature was seen in Bacillus sp.…”

Section: Effect Of Physicochemical Parameters On Do-16 Decolorizationsupporting

confidence: 56%

Biodegradation of azo dye Direct Orange 16 by Micrococcus luteus strain SSN2

Singh

Chatterji

Nandini

et al. 2014

Int. J. Environ. Sci. Technol.

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In the present study, the decolorization and degradation of azo dye Direct Orange 16 (DO-16) by a potential bacterial isolate isolated from textile effluent were evaluated. Through 16S rRNA sequence matching, the potential isolate was identified as Micrococcus luteus strain SSN2. The effects of various factors (pH, temperature, salt and dye concentration) on decolorization were investigated. The strain SSN2 had the ability to decolorize DO-16 with 96 % efficiency at pH 8, 37°C and 3 % NaCl in a short time of 6 h under static conditions. DO-16 decolorization was assessed by UV-Vis spectrophotometer with gradual decrease of dye peak intensity at 430 nm (k max ). Analytical techniques (thin-layer chromatography, Fourier transform infrared spectroscopy and high-performance liquid chromatography) further confirmed that biodegradation of DO-16 was due to reduction of the azo bond. The phytotoxicity assay (with respect to seeds of Vigna mungo and Vigna radiata) demonstrated the less toxic nature of the DO-16-degraded products compared to the toxic azo dye.

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Section: Effect Of Physicochemical Parameters On Do-16 Decolorizationsupporting

confidence: 56%

Biodegradation of azo dye Direct Orange 16 by Micrococcus luteus strain SSN2

Singh

Chatterji

Nandini

et al. 2014

Int. J. Environ. Sci. Technol.

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“…Fig. 2 shows that the complete dye decolorization increased with increase in temperature from 20-40°C and decreases with increase in temperature above the 40°C,which might be due to the loss of cell viability or deactivation of the enzymes responsible for decolorization [10,11]. The 100% dye decolorization was observed at 40°C within 20 h and temperature between 35-45°C was optimum for the removal of Magenta.…”

Section: Resultsmentioning

confidence: 86%

Optimization of Magenta Dye Decolorization Different Parameters by Citrobacter sp.

2017

IJSR

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A thermo-alkalophilic bacterium Citrobacter sp. isolated from textile mill effluent sample as a decolouring microorganism.The maximum 500 mg L -1 Magenta (Basic Red-9) dye decolorization was takes place in 48 h and completely decolorizes the dye Magenta up to a maximum concentration 1000 ppm, however the time taken was 104 h. The optimum physical parameters such as temperature 40°C, pH 8.0 and 2.5% (w/v) of nitrogen source were required for the decolorization of Magenta dye by Citrobacter sp.Effect of seven different metal ions on decolorization of Magenta tested, in which most toxic was Cadmium and less toxic was Lead at 0.05 mM concentration. The curing study indicates that decolorization was takes place by enzyme which was plasmid mediated. The degraded dye metabolites are analyzed by TLC and diazotization, carbylamines test for individual metabolite indicates biotransformation of Magenta into aromatic amine and non-toxic aromatic metabolites. These results suggest that the isolated organism Citrobacter sp.as a useful tool to treat waste water containing reactive dyes at static condition.

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“…Some workers have reported that the higher biomass attained within 24-48 h with fast decolorization at a temperature range of 25-40°C (Jiranuntipon et al, 2008;Ravikumar et al, 2011). Cetin and Donmez (2006) observed the suppressed decolorizing activity at 45°C, might be due to the loss of cell viability or deactivation of the enzymes responsible for decolorization at higher temperature. Some workers reported that melanoidin decolorization by some bacteria was due to its enzymatic activity like oxidase, ligninase and peroxidases.…”

Section: Discussionmentioning

confidence: 98%

Decolorization of Distillery Effluent by Thermotolerant <i>Bacillus subtilis</i>

Tiwari¹

2012

American Journal of Applied Sciences

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Problem statement: Ethanol production from sugarcane molasses generate large volume of effluent containing high Biological Oxygen Demand (BOD) and Chemical Oxygen Demand (COD) along with melanoidin, a color compound generally produced by "Millard reaction". Melanodin is a recalcitrant compound degraded by specific microorganisms having ability to produce mono and dioxygenases peroxidases, phenoxidases and laccases, are mainly responsible for degradation of complex aromatic hydrocarbons like color compound. These compounds causes several toxic effects on living system, therefore may be treated before disposal. Approach: The purpose of this study was to isolate a potential thermotolerant melanoidin decolorizing bacterium from natural resources for treatment of distillery effluent at industrial level. Results: Total 10 isolates were screened on solid medium containing molasses pigments. Three potential melanoidin decolorizing thermotolerant bacterial isolates identified as Bacillus subtilis, Bacillus cereus and Pseudomonas sp. were further optimized for decolorization at different physico-chemical and nutritional level. Out of these three, Bacillus subtilis showed maximum decolorization (85%) at 45°C using (w/v) 0.1%, glucose; 0.1%, peptone; 0.05%, MgSO 4 ; 0.01%, KH 2 PO 4 ; pH-6.0 within 24h of incubation under static condition. Conclusion/Recommendations: The strain of Bacillus subtilis can tolerate higher temperature and required very less carbon (0.1%, w/v) and nitrogen sources (0.1%, w/v) in submerged fermentation. It can be utilized for melanoidin decolorization of distillery effluent at industrial scale.

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Decolorization of reactive dyes by mixed cultures isolated from textile effluent under anaerobic conditions

Cited by 77 publications

References 21 publications

Biodegradation of azo dye Direct Orange 16 by Micrococcus luteus strain SSN2

Biodegradation of azo dye Direct Orange 16 by Micrococcus luteus strain SSN2

Optimization of Magenta Dye Decolorization Different Parameters by Citrobacter sp.

Decolorization of Distillery Effluent by Thermotolerant <i>Bacillus subtilis</i>

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