Comparative study on the treatment of raw and biologically treated textile effluents through submerged nanofiltration.
Raw and biologically treated textile effluents were submerged filtrated using lab-fabricated hollow fiber nanofiltration membrane with a molecular weight cut-off of about 650 g/mol. Permeate flux, chemical oxygen demand (COD) reduction, color removal, membrane fouling, and cleaning were investigated and compared by varying the trans-membrane pressure (TMP) and volume concentrating factor (VCF). It was found that both raw and biologically treated textile effluents could be efficiently treated through submerged nanofiltration. The increase of TMP resulted in a decline in water permeability, COD reduction, color removal, and flux recovery ratio, while the increase of VCF resulted in both increased COD reduction and color removal. Under the TMP of 0.4 bar and VCF of 5.0, fluxes of 1.96 and 2.59 l/m(2)h, COD reductions of 95.7 and 94.2%, color removals of 99.0, and 97.3% and flux recovery ratios of 91.1 and 92.9% could be obtained in filtration of raw and biologically treated effluents, respectively. After filtration, the COD and color contents of the raw effluent declined sharply from 1780 to 325 mg/l and 1.200 to 0.060 Abs/cm, respectively, while for the biologically treated effluent, they decreased from 780 to 180 mg/l and 0.370 to 0.045 Abs/cm, respectively.
['Chen|Qing|Q|', 'Yang|Ying|Y|', 'Zhou|Mengsi|M|', 'Liu|Meihong|M|', 'Yu|Sanchuan|S|', 'Gao|Congjie|C|']
D001673:Biodegradation, Environmental D057919:Biological Oxygen Demand Analysis D003116:Color D004396:Coloring Agents D004784:Environmental Monitoring D007220:Industrial Waste D008567:Membranes, Artificial D036103:Nanotechnology D010539:Permeability D013783:Textile Industry D013784:Textiles D014462:Ultrafiltration D014865:Waste Disposal, Fluid D014867:Water D014874:Water Pollutants, Chemical D018508:Water Purification
Textile effluent Nanofiltration Submerged filtration Color removal COD reduction