Removal of COD and color from hydrolyzed textile azo dye by combined ozonation and biological treatment

Dye Waste Treatment

“…The combined treatment of ozonation and subsequent biological degradation with a biofilm to reduce the color from textile wastewater was studied by Souza et al [96]. Results revealed that ozonation of Remazol Black B was effective and the color removal could reach as high as 96%.…”

Synthesis, characterization, and reactivity of cellulose modified nano zero-valent iron for dye discoloration

“…Thus, removal of dyes from wastewater is essentially necessary before they are discharged into environment. In previous literatures, plenty of methods, including adsorption [1,2], flocculation [3], membrane filtration [4], electrolysis [5,6], biological treatments [7], and oxidation [5,8] have been used for the discoloration of dyes from wastewaters. In recent years, an emerging technology, nano zerovalent iron (NZVI) reduction technology, has aroused more and more attention on dye waste water treatment.…”

Combined biodegradation and ozonation for removal of tannins and dyes for the reduction of pollution loads

“…For the biological treatment, an increase in ozonation time increased the dye concentration reduction in hydrolyzed dye synthetic effluent. The toxicological results of the tests with Daphnia magna showed that there is an increase in toxicity after ozonization and a decrease after submitting the ozonized synthetic wastewater to biological treatment with a biofilm (De Souza et al 2010).…”