Removal of Maxilon Yellow GL in a mixed methanogenic anaerobic culture

Decolorization of dye Reactive Black 5 by newly isolated thermophilic microorganisms from geothermal sites in Galicia (Spain)

“…Furthermore, analysis of the data of biomass and decolorization percentage led us to the hypothesis that the dye was being co-metabolised with the complex organic source (peptone and yeast extract). Two opinions have been argued for many years in relation to the roles of dyes in biological processes: one deems that dyes are not carbon sources, whereas another deems the contrary, and the variability is explained in terms of the different microbial characteristics involved [59,60]. Our results also show that a certain concentration of carbon source (such as yeast extract or peptone) was necessary for the decolorizing process.…”

Evaluation of integrated anaerobic–aerobic biofilm reactor for degradation of azo dye methyl orange

“…The rate constant value decreased from 0.002 to 0.001 L/mg-h with respect to the increasing of Reactive Black 5 concentrations from 100 to 200 mg/L. Sarioglu and Bisgin (2007) also observed the same kinetic model for the degradation of COD and Maxilon Yellow GL using anaerobic mixed culture in a batch experiment with rate constant (k 2 ) values decreased from 0.000003 to 0.0000003 L/mg-h, as the MY GL dye concentration increased from 0 to 1000 mg/L. In contradict, Sponza and Is ßik (2004) reported first-order kinetic model suitable to the COD removal with the rate constant values decreased with increasing trend in dye (Direct Black 38) concentration.…”

Biological decolorization of the reactive dyes Reactive Black 5 by a novel isolated bacterial strain Enterobacter sp. EC3

“…When the glucose concentration was much higher, such as 8 g L −1 and 12 g L −1 , the bacteria could utilize glucose preferentially, thus resulting in the "latent period" or lower decolorization efficiency. Two opinions have been argued for many years: one deems that dyes are not a carbon source since the anaerobic bacteria obtain energy from the glucose instead of the dyes and glucose can enhance the decolorizing performance of biological systems [28]; while another deems that glucose can inhibit the decolorizing activity [16]. The variability may be due to the different microbial characteristics involved.…”