Textile industry is considered one of the main water consumers in the world (200 litres per kg of product) and chemical waste generators, including recalcitrant compounds, surfactants, acids, inorganics, etc., being dyes the principal water pollution. The textile dye Reactive Black 5 in presence of the salt mixture of Na2CO3/Na2SO4 (as additive) was used in this study to propose a methodology to reuse the wastewater treated by simple ozonation. The results shows that the there are two steps in the ozone reaction with the dye: first one is the decoloration and second one the dye decomposition, both occurs in a period of 3-5 minutes. Besides, was found that the water treated could be reuse 8 times into the painting process. However, the final ozone reaction compounds are the main limitations to the recycling process.

Textile dye RB5 wastewater treatment by simple ozonation in presence of additives: A water reuse process

251st National Meeting (2016)

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