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Reuse of textile wastewater after homogenization–decantation treatment coupled to PVDF ultrafiltration membranes
Buscio Olivera, Valentina; Marín, María José; Crespi Rosell, Martin; Gutiérrez Bouzán, María Carmen
Universitat Politècnica de Catalunya. Institut d'Investigació Tèxtil i Cooperació Industrial de Terrassa; Universitat Politècnica de Catalunya. Departament d'Enginyeria Tèxtil i Paperera; Universitat Politècnica de Catalunya. ENMA - Enginyeria del Medi Ambient
The textile industry is one of the largest consumers of water in the world and its wastewater is a serious problem when it is discharged without the proper treatment. In this work, wastewater generated by textile industry was treated coupling a homogenization–decantation treatment with polyvinylidene difluoride (PVDF) ultrafiltration membranes. Initially, the wastewater was aerated in a homogenization–decantation tank where 17% colour and 10% chemical oxygen demand (COD) were removed. The aerated effluent was treated with an ultrafiltration membrane in order to reuse the permeate in new dyeing processes. Firstly, the ultrafiltration treatment was performed in a laboratory plant. The permeate analysis showed 20% colour removal and 60% COD decrease. On the basis of these results, a semi-industrial system was built. With this plant, the permeate characterization showed similar results. The system was found to be scalable and suitable for the treatment of this kind of effluents. Finally, new dyeings were performed with both permeates. Monochromatic dyeings were carried out with 100% permeate whereas 50% permeate was reused for dyeings with a mixture of three dyes. The colour differences were found to be lower than 1.5, which was the acceptance value established
Àrees temàtiques de la UPC::Enginyeria tèxtil ::Impacte ambiental
Àrees temàtiques de la UPC::Enginyeria química::Indústries químiques::Química tèxtil
Textile industry--Waste disposal
Dyes and dyeing
Membranes, Artificial
Ultrafiltration
Real textile wastewater
Permeate reuse
Ultrafiltration
Dyeing process
Membranes
Indústria tèxtil -- Residus
Tints i tenyit -- Aspectes ambientals
Aigües residuals -- Depuració
Ultrafiltració
Membranes (Tecnologia)
http://creativecommons.org/licenses/by-nc-nd/3.0/es/
info:eu-repo/semantics/submittedVersion
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