絮体表面形态对膜污染预测的影响

方乘; 杨盛; 吴云; 张宏伟; 王捷; 王鲁天; 郝松泽

doi:10.11949/0438-1157.20190828

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絮体表面形态对膜污染预测的影响

表面与界面工程 | 更新时间：2026-07-24

- 絮体表面形态对膜污染预测的影响
- Effect of floc surface morphology on membrane pollution prediction
- 化工学报 2020年71卷第2期页码：715-723
- 作者机构：
  
  1. 天津工业大学分离膜与膜过程国家重点实验室，天津 300387
  2. 天津工业大学环境科学与工程学院，天津 300387
  3. 浙江省绍兴市柯桥区污染物总量控制中心，浙江绍兴 312020
- 作者简介：
  
  方乘（1994—），女，硕士研究生，orangefan9@163.com
  吴云（1980—），男，博士，教授，wucloud@163.com
- 基金信息：
  
  国家自然科学基金重点项目(51638011);国家自然科学基金项目(51878448);天津市创新平台专项(16PTGCCX00070)
- DOI：10.11949/0438-1157.20190828
  中图分类号： TQ 028.8
- 收稿：2019-07-18，
  
  修回：2019-09-05，
  
  网络首发：2020-08-14，
  
  纸质出版：2020-02-05
- 稿件说明：
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方乘, 杨盛, 吴云, 张宏伟, 王捷, 王鲁天, 郝松泽. 絮体表面形态对膜污染预测的影响[J]. 化工学报, 2020, 71(2): 715-723

FANG Cheng, YANG Sheng, WU Yun, ZHANG Hongwei, WANG Jie, WANG Lutian, HAO Songze. Effect of floc surface morphology on membrane pollution prediction[J]. CIESC Journal, 2020, 71(2): 715-723
方乘, 杨盛, 吴云, 张宏伟, 王捷, 王鲁天, 郝松泽. 絮体表面形态对膜污染预测的影响[J]. 化工学报, 2020, 71(2): 715-723 DOI： 10.11949/0438-1157.20190828.

FANG Cheng, YANG Sheng, WU Yun, ZHANG Hongwei, WANG Jie, WANG Lutian, HAO Songze. Effect of floc surface morphology on membrane pollution prediction[J]. CIESC Journal, 2020, 71(2): 715-723 DOI： 10.11949/0438-1157.20190828.

摘要

现有对混凝-膜过滤过程中膜污染的预测分析，一般采用XDLVO理论对光滑界面的作用能进行计算，但混凝絮体表面形态会对预测结果产生较大的影响。利用正弦波球体模型对粗糙腐殖酸(HA)絮体表面进行模拟，并通过表面元素积分法(SEI)结合XDLVO理论与复合辛普森规则，对不同粗糙程度的混凝絮体与聚偏氟乙烯(PVDF)膜的界面作用能进行量化模拟；并将结果与传统XDLVO理论模拟的光滑界面作用能进行了比较。实验结果表明，该模型适用于混凝-膜过滤体系中絮体界面作用能的模拟，同时在模拟过程中，由于粗糙度的不同会导致界面作用能在数值上存在1~2个数量级的差异；并且粗糙的絮体较完全光滑的絮体与膜污染趋势的拟合程度更高，即引入絮体表面形态对利用絮体与膜界面间相互作用能表征膜污染趋势的置信度更高。

Abstract

Existing prediction analysis of membrane fouling during coagulation-membrane filtration generally uses XDLVO theory to calculate the action energy of smooth interfaces

but the surface morphology of coagulated flocs will have a greater impact on the prediction results. In this study

a sinusoidal sphere model was used to simulate the surface of rough humic acid (HA) flocs. The interfacial interaction between coagulated flocs with different roughness and polyvinylidene fluoride (PVDF) membranes was quantitatively simulated by surface element integration (SEI) combined with XDLVO theory and compound Simpson rule. The interaction energies of smooth interfaces simulated by XDLVO theory are compared. The experimental results show that the model is suitable for the simulation of floc interfacial interaction energy in coagulation-membrane filtration system

and in the simulation process

the difference in interfacial interaction energy between 1—2 orders of magnitude due to the different roughness

and the fitting degree of rough flocs is better than that of completely smooth flocs and membrane fouling trend. High

that is

the introduction of floc surface morphology has a higher confidence in characterizing the trend of membrane fouling by the interaction between floc and membrane interface.

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Keywords

references

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