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
张超 1张立卿 1胡吉玉 2刘贵彩1
作者信息
- 1. 济南大学 土木建筑学院, 山东 济南 250022
- 2. 济南水务集团有限公司, 山东 济南 250013
- 折叠
摘要
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R2 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.
Abstract
To solve the problem that membrane contamination of nanofiltration membrane,a widely used membrane kind at present,greatly limited development of nanofiltration membrane process,so as to better predict the process of nano-filtration membrane contamination under cross-flow filtration conditions and provide guidance for mitigating nanofiltration membrane contamination,logistic equation was used to fit nanofiltration membrane flux decay curves and establish a logistic nanofiltration membrane contamination prediction model.The established model was used to fit the membrane flux decay curves of different types of nanofiltration membrane,and to investigate effects of key factors such as contaminant kind,nanofiltration membrane type,transmembrane pressure difference,cross-flow rate,and hydraulic conditions on decay rate of nanofiltration membrane flux.The results show that the established model passes the significance test,the fitting degree of experimental data and fitting data of the established model is high,and the coefficient of determination R2 is greater than 0.95.The smaller the decay rate of nanofiltration membrane flux is,the greater the cumulative decay rate of nanofiltration membrane flux after filtration stabilization is.Operating conditions and original water quality conditions can then be adjusted to achieve the purposes of adjusting the decay rate of nanofiltration membrane flux and reducing nanofiltration membrane pollution.
关键词
膜污染/衰减速率/逻辑斯谛方程/纳滤膜/膜通量Key words
membrane contamination/attenuation rate/logistic equation/nanofiltration membrane/membrane flux引用本文复制引用
基金项目
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)
出版年
2024
NETL
NSTL
万方数据