Optimization of Hollow Fiber Ultrafiltration Membrane Type and System Design for Wastewater Reuse in the Textile Industry

摘要

A year long study was conducted to evaluate the application of hollow fiber ultrafiltration for treatment and subsequent reuse of wastewater at several major textile mills. Water jet looms effluent, batcher water effluent, untreated composite effluent and final (post-biologically treated) composite effluent streams were all tested during the pilot program. The results of both the water jet looms and batcher water effluent pilot programs suggested good technical potential. The use of hollow fiber ultrafiltration for the processing of these streams produced a treated stream greatly reduced in the contaminant species believed to restrict successful reuse. Economic evaluations of processes incorporating hollow fiber ultrafiltration are presented. At one plant, the major costs involved in water treatment are incurred by the waste treatment facility. The bulk of controlled contaminant species are introduced through relatively small (volume) streams such as the batcher water effluent. Substantial cost savings could result from segregated treatment of these streams if the large volume of remaining effluent could be discharged with reduction in, or elimination of, further treatment. Untreated composite and final composite effluent streams were tested at two locations during this study. The results of these tests indicated that hollow fiber ultrafiltration removed substantial amounts of contaminant species. The low molecular weight organic species and salts, not removed by ultrafiltration, were considered to be disadvantageous to most dyeing operations. In at least one case (acetate dyeing) the treated stream was considered acceptable for reuse. Good future potential is expected in the application of ultrafiltration for advanced waste treatment.