Low pressure membrane processes - doing more with less energy
Low pressure membrane processes - doing more with less energy
复制标题
DOI：
10.1016/j.desal.2005.04.039
复制
发表时间：
2005-11
期刊：
影响因子：
9.9
通讯作者：
A. Fane;A. Yeo;A. Law;K. Parameshwaran;F. Wicaksana;V. Chen
中科院分区：
文献类型：
--
作者：
A. Fane;A. Yeo;A. Law;K. Parameshwaran;F. Wicaksana;V. Chen
本文讨论了减少低压膜工艺能耗的策略。描述了关于空气鼓泡在控制浸没式膜系统结垢方面的作用的研究。重要因素包括纤维运动和使用最合适的气泡尺寸。给出的结果有利于使用小气泡，并且使用粒子图像测速法进行剪切应力分析支持了这一点。还表明，对于低固体进料的死端过滤，基于传统经济学的最佳通量远大于基于最小化能量使用的最佳通量。这一观察结果可能具有普遍适用性，并说明了最大限度地减少膜工艺对环境影响所固有的资本成本损失。
This paper discusses strategies to reduce energy usage in low pressure membrane processes. Studies on the role of air bubbling to control fouling in submerged membrane systems are described. Factors of importance are shown to include fibre movement and the use of the most appropriate bubble size. Results are given that favour the use of small bubbles, and this is supported by shear stress analysis using particle image velocimetry. It is also shown, for deadend filtration of low solids feed, that the optimal flux based on conventional economics is much greater than the optimal flux based on minimization of energy usage. This observation may be of general applicability and illustrates the capital cost penalty inherent in minimizing environmental impact of membrane processes.