Biodegradation of Direct Red 5B, a textile dye by newly isolated Comamonas sp. UVS

Decolorization enhancement by optimizing azo dye loading rate in an anaerobic reactor

“…Among the identied genera in the inoculum, Pandoraea (5.49%), Comamonas (3.81%) and Delia (1.70%) were reported to possess the abilities of azo dye decolorization and nitro-compound reduction. [25][26][27][28] Most of the genera from the inoculum were not reported to reduce azo dye and nitro directly. All of the dominant genera in the inoculum were at the same order of magnitude.…”

Efficacy of Rhodococcus rhodochrous in Microbial Degradation of Toludine Dye

“…In 35 ml tubes, 15 ml of the sterilized decolorizing medium was inoculated with 1% of 1.5×10 8 cfu ml 1 of the bacterial suspension in distilled water plus 3% (w/v) NaCl, according to the method of Asad et al [14]. Optimization under different culture conditions was done using one factor at a time (OFAT) method with the basic condition of 25 ppm Toluidine Red, pH 8.5, 5% (w/v) NaCl and temperature 35°C.…”

“…The best decolorization was achieved at pH 6.5 with 80% decolorization after 96 hr of incubation. This could be due to the fact that bacterial cultures generally exhibit maximum dye removal at pH values near neutrality or slightly acidic [20][21]. Rhdodococcus was competent of decolorizing Toluidine Red within a wide range of pH (6.5-9.5), in contrast with common decolorizing bacteria that have a narrow pH range [14].…”

“…This could be due to the fact that bacterial cultures generally exhibit maximum dye removal at pH values near neutrality or slightly acidic [20][21]. Rhdodococcus was competent of decolorizing Toluidine Red within a wide range of pH (6.5-9.5), in contrast with common decolorizing bacteria that have a narrow pH range [14]. According to obtained results, the rate of color removal was negligible at strongly acidic (pH 4.5) or strongly alkaline (pH 10.5) conditions (30% at pH 4.5 and 33% at pH 10.5).…”

Enzyme Catalyzed and Ultrasound Assisted Transformation of Selected Pollutants

“…Microorganisms such as bacteria and fungi [23,24], and enzymes such as horseradish peroxidase (HRP) [25] have been used in the transformation of organic pollutants in wastewater.…”