지원사업
학술연구/단체지원/교육 등 연구자 활동을 지속하도록 DBpia가 지원하고 있어요.
커뮤니티
연구자들이 자신의 연구와 전문성을 널리 알리고, 새로운 협력의 기회를 만들 수 있는 네트워킹 공간이에요.
논문 기본 정보
- 자료유형
- 학술대회자료
- 저자정보
- 발행연도
- 2012.10
- 수록면
- 851 - 855 (5page)
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초록· 키워드
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In this paper a model-based approach for on-line estimation of product formation in a fermentation broth is presented. The validation of the proposed method is demonstrated both in pH controlled and uncontrolled fermentation of the bacteria Streptococcus thermophilus. As the concentration of lactic acid produced by the bacteria can not be measured on-line, but is a requisite for predicting the harvesting time of the biomass, it has to be estimated from measurements that are available on-line. The only on-line available measurements are the pH value of the fermentation broth, and additionally, in pH controlled experiments, the amount of base added. Using a model-based approach based on chemical balance equations of the chemical components forming in the fermentation broth, changes in pH can be modelled even if the medium is complex and the ionic composition not exactly known. The model-based approach introduces a model acid-base system that exactly describes the acid-base characteristics of the medium. The model parameters such as concentrations and dissociation constants have to be identified off-line and are specific for the medium. Results from experiments show high accuracy in the estimation of lactic acid concentration.
목차
Abstract
1. INTRODUCTION
2. MATERIALS AND METHODS
3. RESULTS AND DISCUSSION
4. CONCLUSION
REFERENCES
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