A Mathematical Modeling of the Reverse Osmosis Concentration Process of a Glucose Solution

• Main Authors: Chenghan Chen, Han Qin
• Format: Article
• Language: English
• Published: MDPI AG 2019-05-01
• Series: Processes
• Subjects: reverse osmosis; mass transfer process; concentration polarization; mathematical model
• Online Access: https://www.mdpi.com/2227-9717/7/5/271

A mathematical modeling of glucose&#8722;water separation through a reverse osmosis (RO) membrane was developed to research the membrane&#8217;s performance during the mass transfer process. The model was developed by coupling the concentration&#8722;polarization (CP) model, which uses one-dimensional flow assumption, with the irreversible thermodynamic Spiegler&#8722;Kedem model. A nonlinear parameter estimation technique was used to determine the model parameters <i>L_p</i> (hydraulic permeability constant), <i>&#963;</i> (reflection coefficient), and <i>B_s</i> (solute transport coefficient). Experimental data were obtained from the treatment of a pre-treated glucose solution using a laboratory-scale RO system, and studies on the validation of the model using experimental results are presented. The calculated results are consistent with the experimental data. The proposed model describes the RO membrane concentration process and deduces the expression of <i>k</i> (mass transfer coefficient in the CP layer). The verification shows that the expression of <i>k</i> well-describes the reverse osmosis mass transfer of a glucose solution.