Fermentation--Eutrophication

[forda@mail.wsu.edu (Andy Ford)]

This is Andy Ford at WSU replying to the question from Jaime Finguerut
(message 0250) about System Dynamics examples that might relate to a large
scale fermentation system.

Jaime, you might get some ideas from the model of eutrophication of
lakes by Jay Anderson. It is carefully documented in Chapter 5 of TOWARD
GLOBAL EQUILIBRIUM, Dennis Meadows and Donella Meadows, Editors, published
in 1973 by Wright Allen Press, now available from Productivity Press
(800-394-6868). Andersons model had 4 stocks to keep track of the
nutrient, the biomass, the detritus, and the oxygen in hypolimnion. His
equations would probably make sense to the chemists and chemical engineers
that would be involved in operating your fermentation system.


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Andy Ford
Program in Environmental Science and Regional Planning
Washington State University
Pullman, WA 99164-4430
(509) 335-7846
FordA@mail.wsu.edu
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