Sven-Olof Enfors, PhD
Prof. emeritus, biochemical technology
School of Biotechnology
Royal Institute of Technology (KTH)
Roslagstullsbacken 21
S-10691 Stockholm
email: enfors@biotech.kth.se

"I am retired but not tired"

View summary of previous research. .Download List of publications (pdf).


Textbooks

Enfors: Fermentation Process Engineering. Theoretical basis and methods of simulation and control of fermentation processes with emphasis on microbial fed-batch and continuous cultures (99 pages).
View list of content. .
Download the booklet? (.pdf / 8.4 MB). In order to recieve a download link, send an (empty) email to fermentation.process.engineering@enfors.eu, and you will recieve an automated reply containing a temporary download link.

Enfors: Food microbiology : An introduction to the ecology of microbial food spoilage, and food preservation methods (94 pages).
View list of content. .
Download the booklet? (.pdf / 8.3 MB). In order to recieve a download link, send an (empty) email to food.microbiology@enfors.eu, and you will recieve an automated reply containing a temporary download link.

Enfors-Häggström: Bioprocess Technology: Fundamentals and Applications. An introduction to bioprocess technology. A new edition will become available here. For content of the previous 2nd edition 2000, press here.

MATLAB tools for downloading
All tools work on Windows and Mac but require access to a valid MATLAB licence.
SimuPlot requires MATLAB 7 or later but Unplot works on versions from MATLAB 5.

SimuPlot
(new version February 2012)


SimuPlot is a MATLAB toolbox primarily developed for simulation of fermentation processes like fed-batch cultures and chemostats. Also other simulations can be performed by entering user specified models. See left hand panel in figure below.

The SimuPlot toolbox includes demonstration files for simulation of fed-batch fermentations and chemostat processes, both dynamically and as steady-state solutions.
See some of the features ------------------------ >

The use of SimuPlot requires no previous experience of MATLAB, but MATLAB synthax must be used in the specification of the model equations and for use of the CalcTools functions for calculation of process parameters.

Some features of SimuPlot

Permits dynamic and interactive process simulations which can be temporarily interrupted for change of control parameters like feed rate etc.

Includes functions for import of experimental data (.csv or .txt format).

Experimental data can be superimposed on the simulation graph during or after the simulation.

Unlimited (only space restricted) number of indiviual variabel axes.

A CalcTools toolbox with calculation templates for user defined calculations from experimental data.

The SimuPlot menu provides functions for:
-Copy/Paste of individual plots.
-Temporary/permanent removal of data outliers and curve segments.
-Data filter.
-Polynomial and exponential data fitting.
The SimuPlot simulation specifications with variables, constants and model equations. Constants specified and checked in the left table (of the three constants tables) can be changed during a dynamic simulation:
Examples of simulation results:

Simulation of a fed-batch culture with feed start (3L/h) at 6 hrs and increase of feed rate to 5 L/h at 9.5 hrs

Simulation of steady-state values of cell mass (X), limiting substrate (S) and specific growth rate (my) in a chemostat with (thin lines) and without 30% cell recycling (thick lines):
Download the SimuPlot manual here.

Download the SimuPlot toolbox: Send an (empty) email to simuplot@enfors.eu and you will immediately get a temporary link for dowloading the toolbox.

UnPlot

A MATLAB toolbox for converting graphical data to ASCII based numeric tables.

UnPlot from a scanned picture or a photo........

..to a numeric table in .txt format....

...for further data processing in Excel or MATLAB.

Download UnPlot (.zip)
The manual is not yet available. Start command is "unplot". Then read the instructions in red text on top of the page and in the the menu.
This is a beta version. Comments are welcome to enfors@biotech.kth.se

Latest update: 2012-01-29. Comments or questions to enfors@biotech.kth.se