Ethanol production by Saccharomyces cerevisiae in biofilm reactors View Full Text


Ontology type: schema:ScholarlyArticle     


Article Info

DATE

1997-10

AUTHORS

A Demirci, A L Pometto III, K-L G Ho

ABSTRACT

Biofilms are natural forms of cell immobilization in which microorganisms attach to solid supports. At ISU, we have developed plastic composite-supports (PCS) (agricultural material (soybean hulls or oat hulls), complex nutrients, and polypropylene) which stimulate biofilm formation and which supply nutrients to the attached microorganisms. Various PCS blends were initially evaluated in repeated-batch culture-tube fermentation with Saccharomyces cerevisiae (ATCC 24859) in low organic nitrogen medium. The selected PCS (40% soybean hull, 5% soybean flour, 5% yeast extract-salt and 50% polypropylene) was then used in continuous and repeated-batch fermentation in various media containing lowered nitrogen content with selected PCS. During continuous fermentation, S. cerevisiae demonstrated two to 10 times higher ethanol production in PCS bioreactors than polypropylene-alone support (PPS) control. S. cerevisiae produced 30 g L-1 ethanol on PCS with ammonium sulfate medium in repeated batch fermentation, whereas PPS-control produced 5 g L-1 ethanol. Overall, increased productivity in low cost medium can be achieved beyond conventional fermentations using this novel bioreactor design. More... »

PAGES

299-304

References to SciGraph publications

Identifiers

URI

http://scigraph.springernature.com/pub.10.1038/sj.jim.2900464

DOI

http://dx.doi.org/10.1038/sj.jim.2900464

DIMENSIONS

https://app.dimensions.ai/details/publication/pub.1000100863

PUBMED

https://www.ncbi.nlm.nih.gov/pubmed/9439005


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