2024年 02期

基于逻辑斯谛方程对纳滤膜污染预测的建模分析

Modeling Analysis on Nanofiltration Membrane Contamination Prediction Based on Logistic Equation


摘要(Abstract):

为了解决目前应用较广泛的膜种纳滤膜的膜污染极大地限制了纳滤膜工艺发展的问题,从而在错流过滤条件下更好地预测纳滤膜污染的过程,对减缓纳滤膜污染进行指导,基于逻辑斯谛方程,对纳滤膜通量衰减曲线进行拟合,建立逻辑斯谛纳滤膜污染预测模型;利用所建立模型对不同型号纳滤膜的膜通量衰减曲线进行拟合,考察污染物种类、纳滤膜型号、跨膜压差、错流速率、水力条件等关键因素对纳滤膜通量衰减速率的影响。结果表明:所建立模型通过了显著性检验,实验数据与所建立模型拟合数据的拟合度较高,决定系数R~2大于0.95;纳滤膜通量衰减速率越小,则过滤稳定后的纳滤膜通量累积衰减率越大,进而通过调整运行条件和原水质条件等因素,达到调整纳滤膜通量衰减速率,减少纳滤膜污染的目的。

关键词(KeyWords): 膜污染;衰减速率;逻辑斯谛方程;纳滤膜;膜通量

基金项目(Foundation): 国家自然科学基金项目(51808257);; 山东省重点研发计划(公益性科技攻关类)项目(2019GSF109083);; 西部绿色建筑国家重点实验室开放基金项目(LSK201807)

作者(Author): 张超,张立卿,胡吉玉,刘贵彩

DOI: 10.13349/j.cnki.jdxbn.20230330.002

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