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Biomass Monitoring Using Impedance Spectroscopy a
Author(s) -
BRAGOS R.,
GÁMEZ X.,
CAIRÓ J.,
RIU P. J.,
GÒDIA F.
Publication year - 1999
Publication title -
annals of the new york academy of sciences
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.712
H-Index - 248
eISSN - 1749-6632
pISSN - 0077-8923
DOI - 10.1111/j.1749-6632.1999.tb09477.x
Subject(s) - biomass (ecology) , yeast , spectroscopy , dielectric spectroscopy , estimator , chemistry , analytical chemistry (journal) , environmental science , chromatography , mathematics , biology , physics , statistics , biochemistry , ecology , electrode , quantum mechanics , electrochemistry
A bstract : The biomass density in biotechnological processes is often determined by indirect and manual methods. Electrical impedance spectroscopy can provide on‐line viable biomass density estimators. In this work, we present two linear estimators obtained with this technique. Four different microorganisms were measured. The detection threshold was approximately 1 g/L (dry weight) for bacteria and 0.5 g/L for yeast. Liposome suspensions were also used to validate the methods. The monitoring of the continuous growth of a yeast culture is also presented.