Sensor fusion with on-line gas emission multisensor arrays and standard process measuring devices in baker's yeast manufacturing process
✍ Scribed by C.-F. Mandenius; T. Eklöv; I. Lundström
- Publisher
- John Wiley and Sons
- Year
- 1997
- Tongue
- English
- Weight
- 436 KB
- Volume
- 55
- Category
- Article
- ISSN
- 0006-3592
No coin nor oath required. For personal study only.
✦ Synopsis
The use of a multisensor array for measuring array of 15 different gas sensors, a continuous signal the emission from a production-scale baker's yeast manupattern could be produced that could identify the differfacturing process is reported. The sensor array, conent states of the process and transitions between them.
taining 14 different gas-sensitive semiconductor devices For example, the growth phase of the cultivation could and an infrared gas sensor, was used to monitor the gas be clearly separated from the induced state. emission from a yeast culture bioreactor during fed-batch operation. The signal pattern from the sensors was evalu-In this study we show how the same methodology can ated in relation to two key process variables, the cell mass be applied to the manufacturing of baker's yeast. The and the ethanol concentrations. Fusion with the on-line same multisensor array is used here to estimate the sensor signals for reactor weight and aeration rate made ethanol and dry weight of the cell mass and to monitor it possible to estimate cell mass and ethanol concentrathe process state transitions during the fed-batch phase tion using computation with backpropagating artificial neural nets. Identification of process states with the same of the cultivation. fusion of sensor signals was realized using principal component analysis.