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Banerjee, Shantanu; Afzal, Mohammad Areeb; Chokshi, Paresh; Rathore, Anurag S.
Chemical engineering science, 12/2021, Volume: 246Journal Article
•Mechanistic model developed for acoustic wave separation using population balance model.•Acoustic agglomeration kernel predicts CHO cell size distribution as a function of time.•Cell trajectory has been analysed numerically based on the inertial and acoustic forces.•Significant effect of flowrate and acoustic power on cell dynamics in the acoustic zone.•A generalized correlation is developed using Buckingham Pi theorem to predict agglomeration efficiency. Acoustic wave separation (AWS) is gradually emerging as an effective method for continuous clarification of Chinese hamster ovary (CHO) cells. In this paper, we present a mechanistic model for AWS based on population balance model (PBM) along with acoustic agglomeration kernel to predict cell size distribution as a function of time. Results show that more than 90% CSE was achieved for flowrates <5 mL min−1 and acoustic power >12.5 W. Experimental results confirm that the mechanistic model offers an accurate prediction of the CHO agglomeration process. Furthermore, a generalized correlation has been developed using the Buckingham Pi theorem between the dimensionless numbers composed of relevant process and geometrical variables to predict the agglomeration efficiency. To our knowledge, this is the first such study to model the agglomeration dynamics of CHO cells in acoustic standing waves.
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