Decolourization of textile dye Reactive Violet 5 by a newly isolated bacterial consortium RVM 11.1

Abstract

Soil samples collected from contaminated sites of Vatva, Gujarat, India were studied for screening and isolation of organisms capable of decolourizing textile dyes. A bacterial consortium RVM 11.1 was selected on the basis of rapid dye decolourization. Reactive Violet 5 (RV 5) was used as model dye. The consortium exhibited 94% decolourization ability within 37 h under a wide pH range from 6.5 to 8.5 and temperature ranging from 25 to 40°C. The bacterial consortium was able to grow and decolourize RV5 under static conditions in the presence of glucose and yeast extract and also showed an ability to decolourize in the presence of starch in place of glucose. Maximum decolourization efficiency was observed at 200 ppm (mg/l) concentration of RV 5. Bacterial consortium RVM11.1 had the ability to decolourize 10 different dyes tested. The transformation and degradation products after decolourization were examined by HPTLC.

Decolorization of Textile Dyes and Degradation of Mono-Azo Dye Amaranth by Acinetobacter calcoaceticus NCIM 2890

“…First two cycles showed 90% reduction in color in 48 h, however, third cycle took 72 h for 50% removal of the color (data not shown). Similar observations have been recorded previously for the decolorization of reactive dye [18]. The longevity of A. calcoaceticus proves repeated batch decolorization, which is significant for its commercial application, indicated good persistence and stability of this strain in repetitive operations.…”

“…Easy decolorization of dyes concentration at 10 mM was reported by Kurthia sp, but color removal was reduced at increased concentration of dye (30 mM) [17]. Toxicity of dye at increasing concentration has been recorded earlier for decolorization of reactive violet 5 by the bacterial consortium RVM 11.1 [18].…”

Decolorization of synthetic melanoidins-containing wastewater by a bacterial consortium

“…Over the past decade, biological treatment has been investigated [32,35,46]. Microbial decolorization is an environment-friendly and cost competitive alternative to chemical decomposition process [32].…”

“…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.)…”

Photo-Catalytic Behavior of Cdse QDS Sensitized Zr-(1,3,5-Benzene Tricarboxylic Acid) Metal-Organic Frameworks.

“…Photo-catalyst based degradation process has been considered as an alternative technique among various physical [2], chemical [3] and biological [4] techniques for water treatment due to its advantages over the traditional techniques, such as simplicity, quick oxidation, high efficiency and no formation of polycyclic products. Using semiconductors such as metal oxides and sulfides, such as TiO 2 [5], ZnO [6], Fe 2 O 3 [7] and WO 3 [8], for photo-catalytic decolorization of pollutants has received much attention because of possible practical applications.…”