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Novel Surrogates for Membrane Fouling and the Application of Support Vector Machine in Analyzing Fouling Mechanism

It is difficult to recognize specific fouling mechanisms due to the complexity of practical feed water, thus the current studies usually employ foulant surrogates to carry out research, such as alginate and xanthan gum. However, the representativeness of these surrogates is questionable. In this wor...

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Autores principales: Meng, Xianghao, Wang, Fukuan, Meng, Shujuan, Wang, Rui, Mao, Zhongyuan, Li, Yue, Yu, Meifeng, Wang, Xuye, Zhao, Qian, Yang, Linyan
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2021
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8703382/
https://www.ncbi.nlm.nih.gov/pubmed/34940491
http://dx.doi.org/10.3390/membranes11120990
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author Meng, Xianghao
Wang, Fukuan
Meng, Shujuan
Wang, Rui
Mao, Zhongyuan
Li, Yue
Yu, Meifeng
Wang, Xuye
Zhao, Qian
Yang, Linyan
author_facet Meng, Xianghao
Wang, Fukuan
Meng, Shujuan
Wang, Rui
Mao, Zhongyuan
Li, Yue
Yu, Meifeng
Wang, Xuye
Zhao, Qian
Yang, Linyan
author_sort Meng, Xianghao
collection PubMed
description It is difficult to recognize specific fouling mechanisms due to the complexity of practical feed water, thus the current studies usually employ foulant surrogates to carry out research, such as alginate and xanthan gum. However, the representativeness of these surrogates is questionable. In this work, the classical surrogates (i.e., alginate and xanthan gum) were systematically studied, and results showed that they behaved differently during filtration. For the mixture of alginate and xanthan gum, both filtration behaviors and adsorption tests performed by quartz-crystal microbalance with dissipation monitoring (QCM-D) indicated that alginate plays a leading role in fouling development. Furthermore, by examining the filtration behaviors of extracellular polymeric substances (EPS) extracted from practical source water, it turns out that the gel layer formation is responsible for EPS fouling, and the properties of gel layer formed by EPS share more similarities with that formed from pectin instead of alginate. In addition, with the use of experimental data sets extracted from this study and our previous studies, a modeling method was established and tested by the support vector machine (SVM) to predict complex filtration behaviors. Results showed that the small differences of fouling mechanisms lying between alginate and pectin cannot be recognized by Hermia’s models, and SVM can show a discrimination as high as 76.92%. As such, SVM may be a powerful tool to predict complex filtration behaviors.
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spelling pubmed-87033822021-12-25 Novel Surrogates for Membrane Fouling and the Application of Support Vector Machine in Analyzing Fouling Mechanism Meng, Xianghao Wang, Fukuan Meng, Shujuan Wang, Rui Mao, Zhongyuan Li, Yue Yu, Meifeng Wang, Xuye Zhao, Qian Yang, Linyan Membranes (Basel) Article It is difficult to recognize specific fouling mechanisms due to the complexity of practical feed water, thus the current studies usually employ foulant surrogates to carry out research, such as alginate and xanthan gum. However, the representativeness of these surrogates is questionable. In this work, the classical surrogates (i.e., alginate and xanthan gum) were systematically studied, and results showed that they behaved differently during filtration. For the mixture of alginate and xanthan gum, both filtration behaviors and adsorption tests performed by quartz-crystal microbalance with dissipation monitoring (QCM-D) indicated that alginate plays a leading role in fouling development. Furthermore, by examining the filtration behaviors of extracellular polymeric substances (EPS) extracted from practical source water, it turns out that the gel layer formation is responsible for EPS fouling, and the properties of gel layer formed by EPS share more similarities with that formed from pectin instead of alginate. In addition, with the use of experimental data sets extracted from this study and our previous studies, a modeling method was established and tested by the support vector machine (SVM) to predict complex filtration behaviors. Results showed that the small differences of fouling mechanisms lying between alginate and pectin cannot be recognized by Hermia’s models, and SVM can show a discrimination as high as 76.92%. As such, SVM may be a powerful tool to predict complex filtration behaviors. MDPI 2021-12-18 /pmc/articles/PMC8703382/ /pubmed/34940491 http://dx.doi.org/10.3390/membranes11120990 Text en © 2021 by the authors. https://creativecommons.org/licenses/by/4.0/Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Meng, Xianghao
Wang, Fukuan
Meng, Shujuan
Wang, Rui
Mao, Zhongyuan
Li, Yue
Yu, Meifeng
Wang, Xuye
Zhao, Qian
Yang, Linyan
Novel Surrogates for Membrane Fouling and the Application of Support Vector Machine in Analyzing Fouling Mechanism
title Novel Surrogates for Membrane Fouling and the Application of Support Vector Machine in Analyzing Fouling Mechanism
title_full Novel Surrogates for Membrane Fouling and the Application of Support Vector Machine in Analyzing Fouling Mechanism
title_fullStr Novel Surrogates for Membrane Fouling and the Application of Support Vector Machine in Analyzing Fouling Mechanism
title_full_unstemmed Novel Surrogates for Membrane Fouling and the Application of Support Vector Machine in Analyzing Fouling Mechanism
title_short Novel Surrogates for Membrane Fouling and the Application of Support Vector Machine in Analyzing Fouling Mechanism
title_sort novel surrogates for membrane fouling and the application of support vector machine in analyzing fouling mechanism
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8703382/
https://www.ncbi.nlm.nih.gov/pubmed/34940491
http://dx.doi.org/10.3390/membranes11120990
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