College of Geography and Environmental Sciences, Zhejiang Normal University, Jinhua 321004, PR China.
College of Geography and Environmental Sciences, Zhejiang Normal University, Jinhua 321004, PR China.
Bioresour Technol. 2017 Jun;234:198-207. doi: 10.1016/j.biortech.2017.03.033. Epub 2017 Mar 8.
In this paper, a new method for quantification of interfacial interactions between a randomly rough particle and membrane surface was proposed. It was found that sludge flocs in a membrane bioreactor were of apparent fractal characteristics, and could be modeled by the modified two-variable Weierstrass-Mandelbrot (WM) function. By combining the surface element integration (SEI) method, differential geometry and composite Simpson's rule, the quantitation method for calculating such interfacial interactions was further developed. The correctness and feasibility of the new method were verified. This method was then applied to evaluate the interfacial interactions between a randomly rough particle and membrane surface. It was found that, randomly rough particle possesses stronger interaction strength than regularly rough particle but weaker strength than smooth particle with membrane surface, indicating significant effects of surface morphology and roughness. The proposed method in this study has broad application prospect in membrane fouling study.
本文提出了一种新的方法来量化随机粗糙颗粒与膜表面之间的界面相互作用。研究发现，膜生物反应器中的污泥絮体具有明显的分形特征，可以用修正的两变量 Weierstrass-Mandelbrot（WM）函数来建模。通过结合表面元积分（SEI）方法、微分几何和复合辛普森规则，进一步开发了计算这种界面相互作用的定量方法。验证了新方法的正确性和可行性。然后，将该方法应用于评估随机粗糙颗粒与膜表面之间的界面相互作用。结果表明，随机粗糙颗粒与膜表面的相互作用强度强于规则粗糙颗粒，但弱于光滑颗粒，表明表面形态和粗糙度的显著影响。本研究提出的方法在膜污染研究中有广阔的应用前景。
