Traditional Chinese Medicine Extract Properties Incorporated Energy Analysis for Membrane Concentration Processes

This paper aims to propose an estimation approach for energy evaluation incorporated with the changes of the feed characteristics integrated during the water removal process, such as viscosity, density, and heat capacity, into the model construction of energy consumption for different membrane-based concentration processes

Wanyu Li; Qiyuan Li; Liwei Guo; Juyan Liu; Kai Wang; Wenwei Zhong

2021

Scholarcy highlights

  • Traditional Chinese medicines, which are essentially herbal based extracts with profound therapeutic effects, are attracting surging attention from the healthcare and pharmaceutical industry
  • The cross-comparison of SEC confirmed that the concentration of YPFS extract by reverse osmosis technology is still the least energy intensive before reaching the osmotic pressure of the solution, whereas the SEC analysis suggested that both membrane distillation and thermal evaporator showed no substantial increase in energy consumption at higher concentration, implying that they are capable of further removing water in the pre-concentrated extracts by RO
  • Application of membrane technology in the concentration process of plant-based extracts has been frequently studied in recent decades
  • The novel feature of these models was the incorporation of YPFS properties correlations based on the ◦ Brix profile developed in these processes
  • Results generated from models developed in this study showed decent alignment with the experimentally acquired data; The change in the properties of YPFS solution was characterized via the correlation with ◦ Brix profile during concentration process
  • The dynamic SEC analysis for RO process was largely dependent on the feed pressure, reported at 50 kWh/m3 at feed pressure of 0.9 MPa with less than 50% water removal
  • 0.95; Insufficient heating resulted from the reduction of feed volume and retention time towards the later stage of concentration by MD process may cause a rapid decrease in flux and significant increase in dynamic SEC; Evaluation via a cross-comparison among the three concecntration technologies confirmed that RO provided the best energy performance below a water removal of 77%
  • The approach in this study was able to simplify the model development process by zcustomizing general transport models of membrane processes for a specific new feed solution with deficient knowledge in solution characteristics and properties relevant to the concentration process

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