Decolorization of Acid Red 27 and Reactive Red 2 by Enterococcus faecalis under a batch system

Abstract

The objectives of this study were to investigate: (1) the capacity of Enterococcus faecalis on the decolorization of the azo dyes Acid Red 27 and Reactive Red 2; and (2) the growth characteristics of E. faecalis on those dyes. E. faecalis was able to decolorize Acid Red 27 and Reactive Red 2 effectively. High decolorization efficiency (95-100%) was achieved within 3 h of incubation for Acid Red 27, and 12 h for Reactive Red 2, at room temperature, neutral pH, static and non-aerated condition. Growth characteristics of E. faecalis on azo dyes, which were indicated by cell growth rate, biomass production, and growth yield, was worse than the control. E. faecalis grew better on Acid Red 27 rather than Reactive Red 2.

Decolorization of Direct Blue GLL with enhanced lignin peroxidase enzyme production in Comamonas sp UVS

“…The reason for no decolorization under shaking conditions could be the competition between oxygen and azo compounds for the reduced electron carriers under aerobic conditions. 28,29 This result was similar to that of Handayani et al (2007), 30 who reported the decolorization of Acid Red 27 and Reactive Red 2 by Enterococcus faecalis in a batch system. Mechanical agitation can disturb the elaborate shape of enzyme molecules to such a degree that deactivation occurs.…”

Microbial Decolorization of Triazo Dye, Direct Blue 71: An Optimization Approach Using Response Surface Methodology (RSM) and Artificial Neural Network (ANN)

“…e receiver of reduced electron carriers between oxygen and azo compounds in aerobic conditions caused competition between those two compounds, and it might be the factor for successful decolorization in static conditions. is reaction was the same as Handayani et al [58], who published the decolorization by Enterococcus faecalis for Reactive Red 2 and Acid Red 27 in a batch system. Disruption in the complex form of enzyme molecules from mechanical shake was so much that deactivation arises.…”

Biodegradation of Rubine GFL by Galactomyces geotrichum MTCC 1360 and subsequent toxicological analysis by using cytotoxicity, genotoxicity and oxidative stress studies

“…This suggests that the higher decolorization of Rubine GFL could be due to the combined action of carbon and nitrogen sources on the growth as well as on the decolorization efficiency of G. geotrichum. Handayani et al (2007) reported that the addition of glucose as carbon source enhanced the growth of Enterococcus faecalis and also enhanced the decolorization of Acid Red 27. Finally, yeast extract and starch showed 74 % decolorization when used individually.…”