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Real time in-line monitoring of large scale Bacillus fermentations with near-infrared spectroscopy

Paper ID Volume ID Publish Year Pages File Format Full-Text
23066 43415 2014 9 PDF Available
Title
Real time in-line monitoring of large scale Bacillus fermentations with near-infrared spectroscopy
Abstract

•Bioprocess monitoring with NIR at industrial scale.•Quantitative models predict analyte concentrations in real time.•Fermentation media classification.•Multivariate batch trajectories simplify batch evolution comparison.

NIR spectroscopy was used to monitor Bacillus fermentations in 50 m3 reactors under harsh industrial conditions. The BioPAT® Spectro NIR sensor was attached directly to the bioreactor and provided fast, sensitive, non-destructive and robust measurements without interfering with the microorganism metabolism.Multivariate data analysis techniques related the spectra collected in real time during the fermentation with reference analyte concentrations. Analyte concentrations of future batches can be determined in real time with these models. The SugarSUM parameter was modeled with a SEP of 1.33 g/L in a range of 0–35 g/L. The models for AnalyteSUM (SEP = 0.81 g/L in 0.5–43 g/L range), OD600 (SEP = 2.88 OD in 3.5–50 OD range), dry mass (SEP = 0.09 in 0.4–1.7% range) and Acetoin (SEP = 0.94 g/L in 0–11 g/L range) also show a great prediction performance in the complex media matrix. Sophisticated process control strategies such as a feeding control of the sugar source can be implemented in the future, potentially increasing spore yield due to a reduction of carbon overflow mechanisms.Media classification with PCA identified media formulation errors. Batch evolution models, built with spectra data only, monitored the evolution of new batches by comparing it with a “golden batch” trajectory.

Keywords
CIP, cleaning in place; DCrit, critical distance to the model; DModX, distance to the model in the X space; MSPC, multivariate statistical process control; NIR, near-infrared; PAT, process analytical technology; PC, principal component; PCA, principal com
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Real time in-line monitoring of large scale Bacillus fermentations with near-infrared spectroscopy
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Publisher
Database: Elsevier - ScienceDirect
Journal: Journal of Biotechnology - Volume 189, 10 November 2014, Pages 120–128
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Bioengineering
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
Online Support
Any Questions? feel free to contact us