Aplicación de un proceso fotocatalítico solar a efluentes textiles industriales tras un tratamiento biológico para su reutilización

Autores UPV
Año
CONGRESO Aplicación de un proceso fotocatalítico solar a efluentes textiles industriales tras un tratamiento biológico para su reutilización

Abstract

Dyeing, printing and finishing textile industries usually treat their wastewaters by physical-chemical and biological processes before releasing them into the environment. Although these treatments are effective enough to meet wastewater regulations, achieving high-quality water to reuse it¿s highly expensive. A solar homogeneous photocatalysis treatment of these coloured wastewaters provides suitable water quality for reuse in the same textile firms. In this research study a solar photo-Fenton process was used for the decolourization of the effluents from the final decanting phase of the on-site wastewaters treatment plant. By applying an experimental design Doehlert matrix, the chemicals used in the photo-Fenton treatment were optimized. In the treated effluents 50% Dissolved Organic Carbon (DOC) and 65% Chemical Oxygen Demand (COD) abatement was reached. Absorbance was diminished 70% and the possibility to reuse the treated effluents in new laboratory dyeing processes was confirmed. For these comparative exhaust dyeing tests bleached cotton and commercial direct dyestuffs were employed. Solar photo-Fenton implementation will reduce the use of fresh water as a natural resource and will minimize the problem of industrial coloured effluents from dyeing and finishing textile industries.