Decolourization of Amaranth dye by bacterial biofilm in batch and continuous packed bed bioreactor

Biodegradation of dye-containing wastewater by fusant strains using a sequential anaerobic–aerobic process

“…They found~65% of color removal in a two-stage anaerobic/aerobic process, 80.5% removal at the anaerobic unit and 38.2-58.7% an UASB reactor, respectively. The color removal in this study was less than these previous reports [2,[29][30][31]. Only 11.3 and 12.9% of dye wastewater COD reduction was observed by fusant strain T1 and decoloring-bacteria mixture in anaerobic tank, respectively, which showed decolorization capability of the fusant strain T1 and original decoloring-bacteria is greater than COD reduction capability.…”

Kinetic, isotherm and thermodynamic studies of amaranth dye biosorption from aqueous solution onto water hyacinth leaves

“…16185, is a synthetic azo dye, extensively used in foods and drinks such as wines, soft drinks, cake mixes, cereals, salad dressings, sweets, caviar and coffee, in order to make them more appealing (Zhang and Ma, 2013). It is also widely used for coloring textiles, leather, paper, wood and phenol-formaldehyde resins and during these processes excess dye enters into the wastewater (Anjaneya et al, 2013;Guerrero-Coronilla, 2013). If discharged into surface waters without prior treatment, the dye-colored wastewaters affect aesthetics and water transparency, and may also block the penetration of sunlight and oxygen, which is harmful to aquatic life (Anjaneya et al, 2013).…”

“…It is also widely used for coloring textiles, leather, paper, wood and phenol-formaldehyde resins and during these processes excess dye enters into the wastewater (Anjaneya et al, 2013;Guerrero-Coronilla, 2013). If discharged into surface waters without prior treatment, the dye-colored wastewaters affect aesthetics and water transparency, and may also block the penetration of sunlight and oxygen, which is harmful to aquatic life (Anjaneya et al, 2013). In addition, amaranth dye (AD) can cause adverse health effects such as tumors, allergy, respiratory problems, birth defects, cytostaticity, citotoxicity, mutagenicity, genotoxicity and carcinogenicity (Gupta et al, 2012;Zhang and Ma, 2013;.…”

Biosorption of Azo dyes by spent Rhizopus arrhizus biomass

“…Hence, these dyes are used in textile, pharmaceuticals, plastics, leather, paper, mineral oils, wax industries and even in selected food items and cosmetics. In the dyeing process, *10 % of dye is lost and released in wastewater, making the waterbodies coloured and contaminated with significant amounts of residual dyes (Anjaneya et al 2013;Olukanni et al 2009;Stolz 2001). Colour is the first visible pollution in water bodies which hampers its aesthetic nature, cuts-off sunlight penetration, disturbs photosynthesis and causes chronic and acute toxicity (Aksu et al 2007;Gupta and Suhas 2009).…”

“…These azo dyes are widely used for colouring natural and synthetic fibers, paper, wood, leather, cosmetics, food and pharmaceuticals, especially the shells of medicinal capsules and syrups (Perez-Urquiza and Beltran 2000; Shahmoradi et al 2011;Anjaneya et al 2013Anjaneya et al , 2011. Due to their widespread use and low biodegradability (Avramescu et al 2009), they induce a significant threat to human health and ecological systems.…”