College of Geography and Environmental Sciences, Zhejiang Normal University, Jinhua 321004, PR China.
Environmental Science Research and Design Institute of Zhejiang Province, Hangzhou 310007, PR China.
Bioresour Technol. 2015 Mar;179:367-372. doi: 10.1016/j.biortech.2014.12.055. Epub 2014 Dec 23.
The interfacial interactions between a foulant particle and rough membrane surface in a submerged membrane bioreactor (MBR) were quantitatively assessed by using a new-developed method. It was found that the profile of total interaction versus separation distance was complicated. There were an energy barrier and two negative energy ranges in the profile. Further analysis showed that roughness scale significantly affected the strength and properties of interfacial interactions. It was revealed that there existed a critical range of roughness scale within which the total energy in the separation distance ranged from 0 to several nanometers was continually repulsive. Decrease in foulant size would increase the strength of specific interaction energy, but did not change the existence of a critical roughness scale range. These findings suggested the possibility to "tailor" membrane surface morphology for membrane fouling mitigation, and thus gave significant implications for membrane selection and fabrication in MBRs.
采用一种新开发的方法定量评估了浸没式膜生物反应器（MBR）中污染物颗粒与粗糙膜表面之间的界面相互作用。结果发现，总相互作用与分离距离的关系非常复杂。在该关系图中存在一个能量势垒和两个负能范围。进一步的分析表明，粗糙度尺度显著影响界面相互作用的强度和特性。结果表明，在粗糙度尺度的临界范围内，分离距离中总能量从 0 到几个纳米范围内连续具有斥力。污染物颗粒尺寸的减小会增加特定相互作用能的强度，但不会改变临界粗糙度尺度范围的存在。这些发现表明，有可能“定制”膜表面形态以减轻膜污染，这对 MBR 中的膜选择和制造具有重要意义。
