Quantitative evaluation of the interfacial interactions between a randomly rough sludge floc and membrane surface in a membrane bioreactor based on fractal geometry
Quantitative evaluation of the interfacial interactions between a randomly rough sludge floc and membrane surface in a membrane bioreactor based on fractal geometry
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基于分形几何的膜生物反应器中随机粗糙污泥絮体与膜表面之间的界面相互作用的定量评估
DOI：
10.1016/j.biortech.2017.03.033
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发表时间：
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期刊：
影响因子：
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通讯作者：
Baoqiang Liao
中科院分区：
文献类型：
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作者：
Meijia Zhang;Xiaoling Zhou;Liguo Shen;Xiang Cai;Fangyuan Wang;Jianrong Chen;Hongjun Lin;Rengjie Li;Xiling Wu;Baoqiang Liao
提出了一种新的随机粗糙颗粒与膜表面之间界面相互作用的定量方法。结果表明，膜生物反应器中的污泥絮体具有明显的分形特征，可以用改进的二变量Weierstrass-Mandelbrot（WM）函数进行模拟。将表面元积分法、微分几何和复合辛普森法则相结合，进一步发展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，该方法被应用于评估随机粗糙颗粒和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大于规则粗糙颗粒，而小于光滑颗粒，表明表面形貌和粗糙度对膜表面的相互作用有显著影响。该方法在膜污染研究中具有广阔的应用前景。
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.