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On-line multisensor monitoring of yogurt and Filmjolk fermentations on production scale
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- Navrátil, Marián (author)
- Linköpings universitet,Teknisk biologi,Tekniska högskolan
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- Cimander, Christian (author)
- Linköpings universitet,Teknisk biologi,Tekniska högskolan
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- Mandenius, Carl-Fredrik (author)
- Linköpings universitet,Teknisk biologi,Tekniska högskolan
- (creator_code:org_t)
- 2004-01-14
- 2004
- English.
- In: Journal of Agricultural and Food Chemistry. - : American Chemical Society (ACS). - 0021-8561 .- 1520-5118. ; 52:3, s. 415-420
- Journal article (peer-reviewed)
Abstract
Subject headings
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- Near-infrared (NIR) spectrometry and electronic nose (EN) data were used for on-line monitoring of yogurt and filmjölk (a Swedish yogurt-like sour milk) fermentations under industrial conditions. The NIR and EN signals were selected by evaluation of principal component analysis loading vectors and further analyzed by studying the variability of the selected principal components. First principal components for the NIR and the EN signals were used for on-line generation of a process trajectory plot visualizing the actual state of fermentation. The NIR signals were also used to set up empirical partial least-squares (PLS) models for prediction of the cultures' pH and titratable acidity (expressed as Thorner degrees, °T). By using five or six PLS factors the models yielded acceptable predictions that could be further improved by increasing the number of reliable and precise calibration data. The presented results demonstrate that the fusion of the NIR and EN signals has a potential for rapid on-line monitoring and assessment of process quality of yogurt fermentation.
Subject headings
- TEKNIK OCH TEKNOLOGIER -- Industriell bioteknik -- Bioprocessteknik (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Industrial Biotechnology -- Bioprocess Technology (hsv//eng)
- TEKNIK OCH TEKNOLOGIER -- Annan teknik -- Livsmedelsteknik (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Other Engineering and Technologies -- Food Engineering (hsv//eng)
Keyword
- bioprocess monitoring
- electronic nose
- near-infrared spectroscopy
- principal component analysis
- partial least-squares (PLS) regression
- process trajectory plot
Publication and Content Type
- ref (subject category)
- art (subject category)
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