Post-treatment of anaerobically degraded azo dye Acid Red 18 using aerobic moving bed biofilm process: Enhanced removal of aromatic amines

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

“…The decolorization was noted more than 95% in all phases. This result was due to the reductive environment of the IAABF reactor which enhances the cleavage of azo bond as reported by researchers (Ong et al, 2005;Hosseini Koupaie et al, 2011;Sponza and Is ßik, 2005). In contradict; some researchers experienced the decolorization of acid dyes in aerobic environment (Buitrón et al, 2004).…”

“…Most of the azo dye could decolorize in anaerobic condition as investigated by various researcher groups (Kapdan and Oztekin, 2006;Ong et al, 2005;Hosseini Koupaie et al, 2011;Sponza and Is ßik, 2005). The removal of intermediate compounds formed from the reduction of azo bond could be removed in combined anaerobic-aerobic system (Supaka et al, 2004;Sponza and Is ßik (2002)).…”

“…Convert the pollutants into less harmful products, being cost-competitive, producing less secondary pollutant and being eco-friendly are the merits of biological system over the others (Saratale et al, 2011). Many researchers evaluated the anaerobic or aerobic biodegradation of azo dye (Brás et al, 2005;Is ßik and Sponza, 2005;Buitrón et al, 2004), whereas some effort has been done on the mineralization of azo dye in sequential anaerobic-aerobic environment or integrated anaerobic-aerobic environment (Sponza and Is ßik, 2002;Ong et al, 2005;Supaka et al, 2004;Jonstrup et al, 2011;Hosseini Koupaie et al, 2011, 2013. Sequential anaerobic-aerobic system facilitated the mineralization of azo dye (Sponza and Is ßik, 2002;Hosseini Koupaie et al, 2011).…”

Magnetic calcinated cobalt ferrite/magnesium aluminum hydrotalcite composite for enhanced adsorption of methyl orange

“…To date, several physicochemical techniques have been proposed and attempted for eliminating dyes from aqueous solution [3,[5][6][7][8][9][10]. Among these methods, adsorption, using solid supports, is considered as a quite attractive method for dyes removal due to its high removal efficiency, cost-effective, simplicity of design and operation, and no secondary pollution [11].…”

Comparison of three combined sequencing batch reactor followed by enhanced Fenton process for an azo dye degradation: Bio-decolorization kinetics study

“…Recently, the combined sequencing batch reactor (SBR)/Fenton process as one of the combination systems has also been applied for the efficient decolorization of azo dyes [18][19][20][21]. It is notable that the previous researches are limited to the study accomplished by biological or Fenton processes individually in the case of the azo dye Acid Red 18 (AR18) [14,[22][23][24][25]. Moreover, using the above-mentioned studies has not indicated the high efficiency of chemical oxygen demand (COD) and dye degradation together, especially in high concentrations of AR18 [22][23][24].…”