On-Line Monitoring and Diagnosis of Membrane Fouling Using Ultrasonic Techniques

Chemometrics and Intelligent Laboratory Systems, Available online 26 June 2013, In Press, Accepted Manuscript
On-Line Monitoring and Diagnosis of Membrane Fouling Using Ultrasonic Techniques
Junghui Chen, Yun-Chen Yang, Jia-Yu Huang
R&D Center for Membrane Technology and Department of Chemical Engineering, Chung-Yuan Christian University, Chung-Li 32023, Taiwan, ROC
Abstract
Because fouling in membrane filtration can be affected by various operating conditions, there is a need for diagnosis of the filtration system. It is difficult to identify filtration status from sensor readings alone. Furthermore, some data cannot be obtained online, but only from lab testa.
Authors present a method involving the ultrasonic detection of the local region of the membrane. The wavelet packet transform is used for feature extraction of the reflection signal. Principal component analysis with Gaussian smoothing is then used to classify the data and C4.5 is used to construct the diagnosis system for filtration processes.
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