Estimation of viscosity of highly viscous fermentation media containing one or more solutes

Attilio Converti, Mario Zilli, Saleh Arni, Renzo Di Felice, Marco Del Borghi

Research output: Contribution to journalArticlepeer-review

25 Citations (Scopus)


Viscosity and density data are collected at different temperatures for aqueous solutions of glucose, carboxymethyl cellulose (CMC), or both the solutes and used to check the form of a predictive model proposed in this study for viscosity estimation of mixtures of nonelectrolyte solutes in Newtonian fermentation broths. The model, which derives from the well-known Guzman-Andrade equation and is based on the Eyring theory, supposes a separate contribution of each solute to total viscosity, which linearly increases with solute concentration and exponentially decreases with temperature. Percentage deviations between theoretical and experimental viscosity values of both, the binary and ternary mixtures, are usually <5%, thus confirming the validity of the present approach.

Original languageEnglish
Pages (from-to)81-85
Number of pages5
JournalBiochemical Engineering Journal
Issue number1
Publication statusPublished - Sep 1999


  • Fermentation broth
  • Predictive model
  • Viscosity data

ASJC Scopus subject areas

  • Biotechnology
  • Environmental Engineering
  • Bioengineering
  • Biomedical Engineering

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