Water reuse in the textile industry with integrated treatments: membranes and advanced oxidation processes

Nowadays, traditional methods for dye removal from industrial effluents have been integrated with chemical oxidation processes, mainly advanced oxidation processes (AOPs) which are able to degrade complex organic substances. In this paper, the integration of membrane process and hydro-dynamic cavitation for the treatment of a dyeing wastewater is presented. The degradation efficiency of two dyes (methyl orange and methylene blue) obtained in previous experimental activity and here resumed are used as an input to simulate an integrated treatment cycle in which dyeing waste-water is pre-treated, filtrated through a membrane operation, subjected to an AOP with hydrody-namic cavitation in a hybrid configuration. The integration among physical treatment (membrane) and chemical/physical treatment (hydrodynamic cavitation coupled with Fenton treatment) allows to obtain a depurated stream (permeate) that can be reused as process water and a concentrated stream (retentate) that after the treatment can be safely discharged into superficial body.