Sudhakar M, Vijayalakshmi P, Nilavunesan D, Thiruvengadaravi K V, Baskaralingam P, Sivanesan S
Environmental Management Laboratory, Department of Applied Science & Technology, A.C. College of Technology, Anna University, Chennai 600 025, India.
Water Environ Res. 2016;88(9):838-846. doi: 10.2175/106143016X14609975747568.
The textile dyeing industry consumes a significant amount of high-quality water for processing, which stresses water resources. In recent decades, technologies have been developed to recover water from wastewater. This study describes the high recovery (greater than 92%) of reusable water from an industrial-scale hosiery dye-water recovery facility, consisting of three stages of reverse osmosis and ultrafiltration. The effluent was pre-treated before the membrane process was performed to prevent biofouling. The process performance results in the generation of a consistent water quality that is required for dyeing operations. An average feed flux of 15 l/mh was maintained in the reverse osmosis membrane by regular chemical dosing and cleaning. The integrated membrane process achieved a permeate with a pH of 6.5 and total dissolved solids (TDS) of 160 mg/l, with no other contaminants, which is of sufficient quality for reuse in the cotton hosiery dyeing process.
纺织印染行业在加工过程中消耗大量优质水，这给水资源带来了压力。近几十年来，已开发出从废水中回收水的技术。本研究描述了一个工业规模的针织品染色废水回收设施实现了92%以上的高回收率，该设施由反渗透和超滤三个阶段组成。在进行膜处理之前，对废水进行了预处理以防止生物污染。该工艺性能产生了染色操作所需的稳定水质。通过定期化学加药和清洗，反渗透膜的平均进料通量维持在15升/小时。集成膜工艺得到的渗透液pH值为6.5，总溶解固体（TDS）为160毫克/升，无其他污染物，其水质足以在棉针织品染色过程中重复使用。
