Continuous lactose fermentation by Clostridium acetobutylicum – Assessment of acidogenesis kinetics
Autor: | Fabio Di Napoli, Maria Elena Russo, Piero Salatino, Antonio Marzocchella, Giuseppe Olivieri |
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Přispěvatelé: | Napoli, Fabio, Olivieri, Giuseppe, Russo, MARIA ELENA, Marzocchella, Antonio, Salatino, Piero |
Rok vydání: | 2011 |
Předmět: |
Acidogenesis
Environmental Engineering Clostridium acetobutylicum Continuous stirred-tank reactor Lactose Bioengineering Models Biological chemistry.chemical_compound Acetone Waste Management and Disposal Acetic Acid Chromatography biology Renewable Energy Sustainability and the Environment Butanol General Medicine Hydrogen-Ion Concentration biology.organism_classification Culture Media Kinetics acidogenesi pH effects growth model chemistry Biochemistry Product inhibition Fermentation product inhibition Solvents Butyric Acid Acids |
Zdroj: | Bioresource Technology. 102:1608-1614 |
ISSN: | 0960-8524 |
Popis: | An assessment of the growth kinetics of acidogenic cells of Clostridium acetobutylicum DSM 792 is reported in the paper. Tests were carried out in a continuous stirred tank reactor under controlled conditions adopting a complex medium supplemented with lactose as carbon source to mimic cheese whey. The effects of acids (acetic and butyric), solvents (acetone, ethanol and butanol) and pH on the growth rate of acidogenic cells were assessed. The conversion process was characterized under steady-state conditions in terms of concentration of lactose, cells, acids, total organic carbon and pH. The growth kinetics was expressed by means of a multiple product inhibition and interacting model including a novel formulation to account for the role of pH. The model has the potential to predict microorganism growth rate under a broad interval of operating conditions, even those typical of solvents production. |
Databáze: | OpenAIRE |
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