Investigation of segregated wastewater streams reusability with membrane process for textile industry

Abstract

The reuse and recycling of water in an industry is a hot topic in today's growing economy; considering water scarcity, strict regulations for discharge and the high cost of water treatment and supply. This study was planned to investigate the treatment and recycling potential of textile wastewater using membrane technology. Several combinations of ultrafiltration (UF) and nanofiltration (NF) membranes were applied both independently and in sequential arrangements to find the most suitable option for each type of segregated wastewater flow. However, dyeing and first washing wastewater with high salinity, the configuration of UP005 + NF200 + NF90 in a sequential arrangement provided 99.4% color, 99.1% COD, and 43.2% conductivity rejection. The UF + NF configuration was evaluated as the most promising solution to achieve the required water quality for water reuse applications without affecting fabric dyeing parameters and quality in case of pre-treatment and post dyeing operations. (C) 2019 Elsevier Ltd. All rights reserved.