...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Separation and Purification Technology >Direct contact membrane distillation for the treatment of industrial dyeing wastewater and characteristic pollutants
【24h】

Direct contact membrane distillation for the treatment of industrial dyeing wastewater and characteristic pollutants

机译：直接接触膜蒸馏用于治疗工业染色废水和特征污染物

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

In this work, the feasibility of utilizing direct contact membrane distillation (DCMD) for the treatment of industrial dyeing wastewater and their characteristic pollutants were demonstrated. Two commercial hydrophobic membranes made of polytetrafluoroethylene (PTFE) and polyvinylidene fluoride (PVDF) were comparatively studied. The results suggest that PTFE membrane always demonstrates enhanced flux and rejection performance for selected characteristic pollutants compared with that of PVDF counterpart, which can be ascribed to its enhanced hydrophobicity and reduced wettability. When challenging the industrial and synthetic dyeing wastewater, the DCMD system demonstrates different performances in terms of flux and rejection efficiency, which are closely related to the sample compositions and concentration. The relevant COD and color removal efficiency over 48 h continuous operation was, respectively, 90% and 94% for sample 1# (from discharge outlet of the dyeing vat wastewater), 96% and 100% for sample 2# (from discharge outlet of the wastewater treatment plant after physicochemical and biological treatment), and 89% and 100% for sample 3# (synthetic dyeing wastewater after bench-scale membrane bioreactor treatment). Furthermore, various advanced characterization techniques were employed to study the fouling properties and performance of the PTFE membrane. The suspended solids accumulation (e.g., SiO2 and dispersed dyes) may be responsible for the membrane wetting and fouling. These overall findings suggest that the DCMD process is a promising option for the treatment of dyeing wastewater with limited energy consumption and high performance.
机译：在这项工作中，证实了利用直接接触膜蒸馏（DCMD）用于治疗工业染色废水及其特征污染物的可行性。相对研究，两种由聚四氟乙烯（PTFE）和聚偏二氟乙烯（PVDF）制成的两种商业疏水膜。结果表明，与PVDF对应物相比，PTFE膜总始终显示出选择特征污染物的增强的助熔剂和排斥性能，这可以归因于其增强的疏水性和降低的润湿性。当挑战工业和合成染色废水时，DCMD系统在助焊剂和排斥效率方面表现出不同的性能，这与样品组合物和浓度密切相关。相对于48小时的相关鳕鱼和颜色去除效率分别为90％和94％，适用于样品1＃（从染色增值税废水的排出出口），96％和100％样品2＃（从排出出口物理化学和生物治疗后的废水处理厂，和样品3＃的89％和100％（长凳膜生物反应器治疗后合成染色废水）。此外，采用各种先进的表征技术来研究PTFE膜的结垢性能和性能。悬浮的固体积累（例如，SiO 2和分散染料）可能是膜润湿和污垢的原因。这些整体研究结果表明，DCMD方法是治疗能耗有限的染色废水和高性能的有希望的选择。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号