Unified membrane fouling index for low pressure membrane filtration of natural waters: Principles and methodology
Unified membrane fouling index for low pressure membrane filtration of natural waters: Principles and methodology
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DOI：
10.1021/es071043j
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发表时间：
2008-02-01
影响因子：
11.4
通讯作者：
Jacangelo, Joseph G.
中科院分区：
文献类型：
--
作者：
Huang, Haiou;Young, Thayer A.;Jacangelo, Joseph G.
膜过滤被认为是一项重要的技术，可以促进供水的可持续性。然而，它的持续发展需要建立适当的技术来评估膜污染。在这项研究中开发了统一膜污染指数（UMFI），以量化和评估在不同规模的水处理中观察到的低压膜（LPM）的污染。UMFI的基础是修正的Hermia模型，适用于恒压和恒流量过滤。UMFI的采用使得可以通过直接使用感兴趣的商业LPM来简化和标准化膜污染潜力的实验室规模测试。这种方法可以克服结垢评估的主要挑战，即，膜的污染潜力，这还没有完全解决现有的污染指数的特异性。本文介绍了UMFI的基本原理，以及实验室规模测试的方法。UMFI的应用评估的污染LPM由天然地表水进行了讨论。实验室规模UMFI和中试规模UMFI之间的良好协议被发现，这表明环境应用的新的科学概念的有效性。
Membrane filtration is considered an important technology that can contribute to the sustainability of water supplies. However, its continued development necessitates the establishment of proper techniques for the assessment of membrane fouling. Unified Membrane Fouling Index (UMFI) was developed in this study in order to quantify and assess the fouling of low-pressure membranes (LPM) observed at various scales of water treatment. The foundation of UMFI is a revised Hermia model applied to both constant pressure and constant flux filtration. The adoption of UMFI makes it possible to simplify and standardize the bench-scale testing of membrane fouling potential by directly using the commercial LPM of interest. This approach can overcome a major challenge to fouling assessment, i.e., the membrane-specificity of fouling potential, which has not been wholly addressed by existing fouling indices. The fundamentals of UMFI are presented in this paper, together with the methodology for bench-scale testing. The application of UMFI to the assessment of the fouling of a LPM by a natural surface water is also discussed. Good agreement between bench-scale UMFI and pilot-scale UMFI was found, suggesting the validity of this new scientific concept for environmental applications.