• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Water Science & Technology. Water Supply >Fouling of low-pressure (MF and UF) membranes by wastewater effluent organic matter (EfOM): characterization of EfOM foulants in relation to membrane properties
【24h】

Fouling of low-pressure (MF and UF) membranes by wastewater effluent organic matter (EfOM): characterization of EfOM foulants in relation to membrane properties

机译：废水流出的有机物（EfOM）对低压（MF和UF）膜的结垢：与膜特性相关的EfOM污垢的表征

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

Low-pressure (micro- and ultrafiltration) membranes are increasingly being used in water reclamation processes treating secondary or tertiary effluent from wastewater treatment plants. The main challenge remains the fouling of membrane surface/pores by organic matter which prevents efficient operation. The extent of this fouling strongly depends on feed water quality as well as membrane properties. The aim of this study is to characterize wastewater effluent organic matter (EfOM) and to describe its fouling behavior in relation to various membrane properties (pore size, charge, material, hydrophobicity) through evaluation with stirred cell experiments, elemental analysis, ~(13)C-NMR spectroscopy, and atomic force spectroscopy. Four membranes are tested - one ultrafiltration (UF) membrane and three microfiltration (MF) membranes - with bulk EfOM, derived from the Boulder, Colorado, USA, wastewater treatment plant, as well as with EfOM isolates. The hydrophobic microfiltration membrane is most seriously fouled by bulk Boulder EfOM, while the two hydrophilic membranes (MF, UF) made of cellulose acetate are the least fouled. Differences between the flux decline curves of various membranes are less distinct with isolates than with bulk EfOM. The transphilic isolate (TPIA-Bld) exhibited a higher fouling potential than the hydrophobic isolate (HPOA-Bld). This behaviour is due to the different chemical characteristics of the isolates, namely the higher percentage of hetero-atoms (oxygen and nitrogen) of the transphilio isolate compared to the hydrophobic isolate. Finally, atomic force microscope (AFM) images present clear evidence of fouling. AFM is clearly able to detect the fouling layer, although it has not been possible to distinguish between pore blockage and surface fouling thus far.
机译：低压（微滤和超滤）膜越来越多地用于水回收工艺中，以处理废水处理厂的二次或三次流出物。主要挑战仍然是有机物对膜表面/孔的污染，这阻碍了有效操作。结垢的程度在很大程度上取决于给水水质以及膜的性能。这项研究的目的是通过搅拌池实验评估，元素分析，〜（13）来表征废水有机物（EfOM）并描述其与各种膜特性（孔径，电荷，材料，疏水性）相关的污垢行为。 C-NMR光谱和原子力光谱。测试了四种膜-一种超滤（UF）膜和三种微滤（MF）膜-含大量EfOM（来自美国科罗拉多州博尔德市），废水处理厂以及EfOM分离物。大量的Boulder EfOM严重污染了疏水性微滤膜，而由醋酸纤维素制成的两个亲水性膜（MF，UF）污染最少。分离株的各种膜通量下降曲线之间的差异不如散装EfOM明显。亲液分离物（TPIA-Bld）比疏水分离物（HPOA-Bld）具有更高的结垢潜力。该行为归因于分离物的不同化学特性，即，与疏水分离物相比，亲液分离物的杂原子（氧和氮）百分比更高。最后，原子力显微镜（AFM）图像提供了明显的结垢证据。 AFM显然能够检测到结垢层，尽管到目前为止尚无法区分孔堵塞和表面结垢。

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