Evaluation method for the drying performance of enzyme containing formulations

Jakob Sloth, P. Bach, Anker Degn Jensen, Søren Kiil

Research output: Contribution to journalJournal articleResearchpeer-review


A method is presented for fast and cheap evaluation of the performance of enzyme containing formulations in terms of preserving the highest enzyme activity during spray drying. The method is based on modeling the kinetics of the thermal inactivation reaction which occurs during the drying process. Relevant kinetic parameters are determined from differential scanning calorimeter (DSC) experiments and the model is used to simulate the severity of the inactivation reaction for temperatures and moisture levels relevant for spray drying. After conducting experiments and subsequent simulations for a number of different formulations it may be deduced which formulation performs best. This is illustrated by a formulation design study where 4 different enzyme containing formulations are evaluated. The method is validated by comparison to pilot scale spray dryer experiments.
Original languageEnglish
JournalBiochemical Engineering Journal
Issue number1
Pages (from-to)121-129
Publication statusPublished - 2008


  • formulation design
  • downstream processing
  • enzyme production
  • differential scanning calorimetry
  • enzyme deactivation
  • kinetic parameters


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