Currently, textile wastewater is treated combining biological techniques to degrade the organic matter content with coagulation-flocculation processes to remove colour. However, this combination does not enable water reuse. Moreover, the coagulation-flocculation process requires the addition of chemical reagents and generates a waste that must be subsequently disposed for further treatment. In addition to colour, the effluents from the dyeing process with reactive dyes have high salinity. In general, the salts of the effluents are concentrated by means of reverse osmosis membranes, but this technique has high cost and shows operational problems such as maintenance and membrane fouling.
The ECUVal system, based on the combination of electrochemical techniques with UV irradiation, solves the problem of effluent colouration and salinity. From environmental and economic point of view, the use of the ECUVal system is clearly advantageous with respect to the treatments currently applied.