Dye-decolourizing yeasts isolated from Las Yungas rainforest. Dye assimilation and removal used as selection criteria

Textile azo dye degradation by Candida rugosa INCQS 71011 isolated from a non-impacted area in Semi-Arid Region of Brazilian Northeast

“…In some investigations, positive results for textile dye decolorization were obtained using fungi isolated from non-impacted areas (Pajot et al, 2011;Martorell et al, 2012), as similarly obtained in the present study. The ascomycetous yeast C. rugosa INCQS 71011 showed a very good result mainly in the decolorization of RR198, a monoazo, decolorizing 100% of the dye at a concentration of 100 mg l -1 after 48 h, while within 24 h the decolorization was 75.60%.…”

“…Within 16-48 h of incubition the color disappeared completely without residual color on the biomass in the case of only one of these dyes, the Reactive Black 5. The metabolic profile species-specific, such as enzymatic activity (Ramalho et al, 2005;Martorell et al, 2012), media culture (Ramalho et al, 2002;Kaushik and Malik, 2010) and the structure complexity of the dye (Fu and Viraraghavan, 2001;Bergsten-Torralba et al, 2009) can greatly influence the final response of fungal degradation. In the present work, C. rugosa INCQS 71011 was much more efficient degrading RR198, a single azo class dye, than it was towards RR 141, a double azo class dye, which took longer to be degraded and towards RB 241, another double azo class dye, which was not completely degraded under the conditions established in this study.…”

Bio-removal of Azo Dyes: A Review

“…Microorganisms also encode number of oxidative enzymes for degradation of azo dyes such as polyphenol oxidases (PPO), manganese peroxidase (MnP), lignin peroxidase (LiP), laccase (Lac), tyrosinase (Tyr), N-demethylase (Oturkar et al, 2011;Martorell et al, 2012), dye decolorizing peroxidases (Liers et al, 2010) and cellobiose dehydrogenase (Tilli et al, 2011). These oxidases have been reported in bacteria, filamentous fungi, yeast and plants.…”

“…In recent years, there has been rigorous work on dye removal by different yeast species because it shows attractive features over bacteria and filamentous fungi, as it offers lots of advantages. They not only grow rapidly like bacteria, but they also have the capacity to sustain in adverse environmental condition, such as at low pH (Yu and Wen, 2005;Martorell et al, 2012). Several simple azo dyes were degraded in liquid aerated batch cultures by yeast strain Candida zeylanoides, the tune of color removal ranged from 44 to 90%, after 7 days of treatment (Martins et al, 1999).…”

Industrial Wastewater Treatment: A Challenging Task in the Industrial Waste Management

“…For detailed information of cavitation training, the readers are requested to refer to previous references. The positive and negative pressures are exerted on a liquid, by the compression and expansion of ultrasonic wave cycles, respectively [93][94][95][96][97][98][99][100]. When the negative pressure applied on the liquid is sufficiently high, the average distance between the molecules would exceed the critical molecular distance necessary to maintain the intact liquid and the liquid will break down to form cavities in vapor and gas-filled micro bubbles.…”