反渗透膜中典型无机和有机污染物的渗透清洗用于纺织印花和染色废水处理。

Osmotic cleaning of typical inorganic and organic foulants on reverse osmosis membrane for textile printing and dyeing wastewater treatment.

机构信息

National Engineering Laboratory of Circular Economy, Institute of Resources and Environment, Beijing Academy of Science and Technology, Beijing, 100095, China; Key Laboratory of Energy-Water Conservation and Wastewater Resources Recovery of China National Light Industry, Beijing, 100095, China.

National Engineering Laboratory of Circular Economy, Institute of Resources and Environment, Beijing Academy of Science and Technology, Beijing, 100095, China; Beijing Management Division of North Grand Canal, Beijing, 101100, China.

出版信息

Chemosphere. 2023 Sep;336:139162. doi: 10.1016/j.chemosphere.2023.139162. Epub 2023 Jun 6.

DOI:10.1016/j.chemosphere.2023.139162

PMID:37290520

Abstract

Reverse osmosis (RO) is one of the most fundamental membrane technology because it has higher salt rejections, which suffers from the issue of membrane fouling, as the membrane is inevitably exposed to foulants during the filtration process. For different fouling mechanisms of RO membrane, physical and chemical cleaning are widely used in the control of RO membrane fouling. The present study investigated the performance and water flux recovery using osmotic cleaning to clean the typical inorganic and organic foulants on RO membrane for textile printing and dyeing wastewater treatment. The effects of operation conditions (i.e., the concentration of cleaning solution, the filtrating time and cleaning time, and the flow rate of cleaning solution) on relative water flux recovery were examined. The results show that a highly water flux recovery (98.3% for cleaning of inorganic fouling and 99.6% for cleaning of organic fouling) was achieved under optimal operation of the concentration and flow rate of cleaning solution and the filtrating and cleaning time. Moreover, the experiment of repeated "filtrating-cleaning" cycles indicated that the osmotic cleaning has highly performance of recoverability of water flux (over 95.0%) can be extended in a relatively long time. The experimental results and changes on SEM and AFM images of RO membrane confirmed the successful development and application of osmotic cleaning for inorganic and organic fouling of RO membrane.

摘要

反渗透（RO）是最基本的膜技术之一，因为它具有更高的盐排斥率，但也存在膜污染的问题，因为在过滤过程中膜不可避免地会接触到污染物。针对 RO 膜的不同污染机制，物理和化学清洗被广泛用于控制 RO 膜污染。本研究采用反渗透清洗法对纺织印花染色废水处理中典型的无机和有机污染物进行清洗，考察了操作条件（如清洗液浓度、过滤时间和清洗时间、清洗液流速）对相对水通量恢复率的影响。结果表明，在清洗液浓度和流速以及过滤和清洗时间的最佳操作条件下，可实现高水通量恢复率（清洗无机污染物时为 98.3%，清洗有机污染物时为 99.6%）。此外，重复“过滤-清洗”循环实验表明，反渗透清洗具有较高的水通量恢复性能（超过 95.0%），在较长时间内均可实现。RO 膜的 SEM 和 AFM 图像的实验结果和变化证实了反渗透清洗在 RO 膜无机和有机污染方面的成功开发和应用。