Process Modelling and Sensitivity Analysis of Roller Mill and Lauter Tun Subsystem Operation

Eduardo Andrés Morales, Dimitrios I. Gerogiorgis

Research output: Chapter in Book/Report/Conference proceedingChapter


Industrial beer production faces many technical as well as economic challenges, with increased competition and trends towards craft beers and non-alcoholic beverages posing new challenges to brewers, who strive to minimise production costs and processing times whilst improving product quality. Milling, mashing and lautering are a major bottleneck in sweet wort production; however, mathematical models describing these unit operations remain elusive. This study focuses on modelling these unit operations as a subsystem, using a dataset compiled from a brewhouse pilot plant. A first-principles model using batch filtration theory is conceived for the lauter tun, with another statistical model based on Partial Least Squares (PLS) regression describes the milling and mashing operations. The first-principles model describes reasonably well lautering data; the PLS model offers reasonable accuracy for batch time prediction. A holistic view on the brewhouse is then emphasised through a sensitivity analysis, in which variables such as mashing agitation speed and pre-mashing, resting and mash-out temperatures have been found to have the greatest influence on subsystem batch time. Strategies for improved operating protocols are also presented, highlighting the strengths and limitations of the models proposed.
Original languageEnglish
Title of host publicationComputer Aided Chemical Engineering
Subtitle of host publication30th European Symposium on Computer Aided Process Engineering
EditorsSauro Pierucci, Flavio Manenti, Giulia Luisa Bozzano, Davide Manca
Number of pages6
ISBN (Print)1570-7946
Publication statusPublished - 19 Oct 2020
Event30th European Symposium on Computer Aided Process Engineering - Online, Milan, Italy
Duration: 31 Aug 20202 Sep 2020

Publication series

NameComputer Aided Chemical Engineering
ISSN (Print)1570-7946


Conference30th European Symposium on Computer Aided Process Engineering
Abbreviated titleESCAPE 30
Internet address


  • Process modelling
  • Partial Least Squares (PLS)
  • roller mill
  • lauter tun
  • beer


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