Decolourization of Textile Azo Dye Direct Red 81 by Bacteria from Textile Industry Effluent

Biological treatment of wastewaters discharged by the textile industry could potentially be problematic due to the high toxicity and recalcitrance of the commonly-used azo dye compounds. In the present report, the fate of two azo dyes under methanogenic conditions was studied. Mordant Orange 1 (MO1) and Azodisalicylate (ADS) were completely reduced and decolorised in continuous UASB reactors in the presence of cosubstrates. In the MO1 reactor, both 5-aminosalicylic acid (5-ASA) and 1,4-phenylenediamine were identified as products of azo cleavage. After long adaptation periods, 5-ASA was detected at trace levels, indicating further mineralization. ADS, a pharmaceutical azo dye constructed from two 5-ASA units, was completely mineralized even in the absence of cosubstrate, indicating that the metabolism of 5-ASA could provide the reducing equivalents needed for the azo reduction. Batch experiments confirmed the ADS mineralization. These results demonstrate that some azo dyes could serve as a carbon, energy, and nitrogen source for anaerobic bacteria.

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Root Bacteria Recruited by Phragmites australis in Constructed Wetlands Have the Potential to Enhance Azo-Dye Phytodepuration

Microorganisms ◽

10.3390/microorganisms7100384 ◽

2019 ◽

Vol 7 (10) ◽

pp. 384 ◽

Cited By ~ 7

Author(s):

Valentina Riva ◽

Francesca Mapelli ◽

Evdokia Syranidou ◽

Elena Crotti ◽

Redouane Choukrallah ◽

...

Keyword(s):

Plant Growth ◽

Phragmites Australis ◽

Textile Industry ◽

Azo Dye ◽

Growth Promotion ◽

Wide Spectrum ◽

Reactive Black 5 ◽

Potential Use

The microbiome associated with plants used in phytodepuration systems can boost plant growth and services, especially in ecosystems dealing with recalcitrant compounds, hardly removed via traditional wastewater (WW) treatments, such as azo-dyes used in textile industry. In this context, we aimed to study the cultivable microbiome selected by Phragmites australis plants in a Constructed Wetland (CW) in Morocco, in order to obtain candidate inoculants for the phytodepuration of azo-dye contaminated WW. A collection of 152 rhizospheric and endophytic bacteria was established. The strains were phylogenetically identified and characterized for traits of interest in the phytodepuration context. All strains showed Plant Growth Promotion potential in vitro and 67% of them significantly improved the growth of a model plant in vivo compared to the non bacterized control plants. Moreover, most of the isolates were able to grow in presence of several model micropollutants typically found in WW, indicating their potential use in phytodepuration of a wide spectrum of effluents. The six most promising strains of the collection were tested in CW microcosms alone or as consortium: the consortium and two single inocula demonstrated to significantly increase the removal of the model azo-dye Reactive Black 5 compared to the non bacterized controls.

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Significant reduction in toxicity, BOD, and COD of textile dyes and textile industry effluent by a novel bacterium Pseudomonas sp. LBC1

Folia Microbiologica ◽

10.1007/s12223-012-0103-z ◽

2012 ◽

Vol 57 (2) ◽

pp. 115-122 ◽

Cited By ~ 9

Author(s):

Amar A. Telke ◽

Seon-Won Kim ◽

Sanjay P. Govindwar

Keyword(s):

Textile Industry ◽

Textile Dyes ◽

Pseudomonas Sp ◽

Novel Bacterium ◽

Industry Effluent

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Comparative Performances of an Activated Sludge Process and a Membrane Bioreactor for the Treatment of a Textile Industry Effluent

Journal of Bioprocessing & Biotechniques ◽

10.4172/2155-9821.1000310 ◽

2017 ◽

Vol 07 (05) ◽

Author(s):

Chamam B ◽

Heran M ◽

Amar RB ◽

Grasmick A

Keyword(s):

Activated Sludge ◽

Textile Industry ◽

Membrane Bioreactor ◽

Activated Sludge Process ◽

Industry Effluent

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Active manganese oxide: a novel adsorbent for treatment of wastewater containing azo dye

Water Science & Technology ◽

10.2166/wst.2009.758 ◽

2009 ◽

Vol 60 (12) ◽

pp. 3017-3024 ◽

Cited By ~ 13

Author(s):

S. Chakrabarti ◽

B. K. Dutta ◽

R. Apak

Keyword(s):

Manganese Oxide ◽

Congo Red ◽

Textile Industry ◽

Azo Dye ◽

Sodium Sulphate ◽

New Variety ◽

Freundlich Isotherms ◽

Adsorption Data ◽

Equilibrium And Kinetics ◽

Pseudo Second Order

A new variety of active manganese oxide was prepared, characterized, and tested for its potential of adsorbing Congo Red, a dis-azo dye, from aqueous solutions. Both equilibrium and kinetics were investigated over different values of process parameters such as temperature (25–45°C), adsorbent loading (0.4–0.6%), initial dye concentration (50–500 mg/L), presence of salts (sodium sulphate, 500 mg/L) and the oxygen content (MnOx, x = 1.2, 1.33 and 2) of the adsorbent. The equilibrium adsorption data were fitted to Langmuir and Freundlich isotherms. Langmuir adsorption capacity of the sorbent (x = 1.33) for Congo Red was 38.6 mg/g at room temperature which is substantially higher than those for commercial manganese dioxide, red mud, coir pith, activated carbon, and fly ash. The kinetic data were best interpreted using a pseudo-second order model. The results show that the active manganese oxide used in this work removes the dye by reversible adsorption and has the potential for practical use for remediation of textile industry effluents.

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