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Nanofiltration for recovering wastewater from a specific dyeing facility

机译：纳滤用于从特定染色设备中回收废水

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摘要

Textile processing industry generally requires significant amount of process water for cleaning, rinsing and dyeing purposes. Advanced membrane separation with high efficiency, ease and economic of operation as one of the most promising technologies has become increasingly attractive for reclamation of wastewater due to the shortage of fresh water supplies caused by the development of global population and industry. The objective of the study was to investigate the feasibility for recovering the wastewater from a specific dyeing facility by nanofiltration (NF). Process review at the dyeing facility was conducted and wastewater streams were characterized. A bench scale unit with total membrane area of 465 cm2 was used in this study. Trials were conducted to recover the wastewater using three types of NF membranes. The results indicated that the NF membrane process performed high efficiency of >99% for dye removal and NE-70 membrane showed better performance in terms of flux and separation than Desal-5 membrane. Turbidity, hardness, TOC and color of the treated water were less than 0.2 NTU, 60 mg/L as CaCO3, 10 mg/L and 5 HU, respectively. It could be concluded that it was feasible to recover 70% of the wastewater from the dyeing facility using a NF membrane process and the quality of the treated water could meet the requirements of dyeing process.
机译：纺织品加工业通常需要大量的加工用水以用于清洁，漂洗和染色目的。由于全球人口和工业的发展导致淡水供应的短缺，作为最有前途的技术之一，具有高效，简便和经济操作性的先进膜分离技术对于废水的回收越来越有吸引力。该研究的目的是研究通过纳滤（NF）从特定的染色设备回收废水的可行性。在染色工厂进行了工艺审查，并对废水进行了表征。在这项研究中，使用了一个膜面积为465 cm2的台式秤。使用三种类型的NF膜进行了试验以回收废水。结果表明，NF膜工艺对染料的去除效率> 99％，NE-70膜在通量和分离方面表现出比Desal-5膜更好的性能。处理后的水的浊度，硬度，TOC和色度分别小于0.2 NTU，CaCO3为60 mg / L，10 mg / L和5 HU。可以得出结论，使用NF膜工艺从染色设备中回收70％的废水是可行的，并且处理后的水质可以满足染色工艺的要求。

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