Research Article Open Access

Soft Sensor Modeling of Product Concentration in Glutamate Fermentation using Gaussian Process Regression

Rongjian Zheng1 and Feng Pan1
  • 1 Jiangnan University, China

Abstract

The on-line control of glutamate fermentation process is difficult, owing to the typical uncertainties of biochemical process and the lack of suitable on-line sensors for primary process variables. A prediction model based on Gaussian Process Regression (GPR) is presented to predict glutamate concentration online. First, Partial Least Squares (PLS) is applied to extract the features of the input secondary variables to reduce the number of the variables dimension and eliminate the correlation, through variables selection to reduce model complexity and improve model tracking performance. Validation was carried out in a 5 L fermentation tank for 10 batches glutamate fermentation process. Simulation results show that the proposed model outperforms the PLS and Support Vector Machine (SVM) model and the Root Mean Square Error (RMSE) are 1.59, 7.98 and 1.95, respectively. It can provide effective operation guidance for control and optimization of the glutamate fermentation process.

American Journal of Biochemistry and Biotechnology
Volume 12 No. 3, 2016, 179-187

DOI: https://doi.org/10.3844/ajbbsp.2016.179.187

Submitted On: 1 June 2016 Published On: 17 September 2016

How to Cite: Zheng, R. & Pan, F. (2016). Soft Sensor Modeling of Product Concentration in Glutamate Fermentation using Gaussian Process Regression. American Journal of Biochemistry and Biotechnology, 12(3), 179-187. https://doi.org/10.3844/ajbbsp.2016.179.187

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Keywords

  • Glutamate Fermentation
  • Gaussian Process Regression
  • Soft Sensor
  • Partial Least Squares
  • Input Variable Extraction
  • Modeling