Journal article
Utilization of condensed distillers solubles as nutrient supplement for production of nisin and lactic acid from whey
Applied biochemistry and biotechnology, Vol.137(1), pp.875-884
04/2007
Handle:
https://hdl.handle.net/2376/100696
PMID: 18478441
Abstract
The major challenge associated with the rapid growth of the ethanol industry is the usage of the coproducts, i.e., condensed distillers solubles (CDS) and distillers dried grains, which are currently sold as animal feed supplements. As the growth of the livestock industries remains flat, alternative usage of these coproducts is urgently needed. CDS is obtained after the removal of ethanol by distillation from the yeast fermentation of a grain or a grain mixture by condensing the thin stillage fraction to semisolid. In this work, CDS was first characterized and yeast biomass was proven to be the major component of CDS. CDS contained 7.50% crude protein but with only 42% of that protein being water soluble. Then, CDS was applied as a nutrient supplement for simultaneous production of nisin and lactic acid by Lactococcus lactis subsp. lactis (ATCC 11454). Although CDS was able to support bacteria growth and nisin production, a strong inhibition was observed when CDS was overdosed. This may be caused by the existence of the major ethanol fermentation byproducts, especially lactate and acetate, in CDS. In the final step, the CDS based medium composition for nisin and lactic acid production was optimized using response surface methodology.
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Details
- Title
- Utilization of condensed distillers solubles as nutrient supplement for production of nisin and lactic acid from whey
- Creators
- Chuanbin Liu - Energy & Environmental Research Center University of North Dakota 58203 Gand Forks NDBo Hu - Washington State University 99164-6120 Pullman WAShulin Chen - Washington State University 99164-6120 Pullman WARichard Glass - National Corn Growers Association 63005 Chesterfield MO
- Publication Details
- Applied biochemistry and biotechnology, Vol.137(1), pp.875-884
- Academic Unit
- Biological Systems Engineering, Department of
- Publisher
- Humana Press; Totowa
- Identifiers
- 99900546652001842
- Language
- English
- Resource Type
- Journal article