ISSN:
1750-3841
Source:
Blackwell Publishing Journal Backfiles 1879-2005
Topics:
Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
,
Process Engineering, Biotechnology, Nutrition Technology
Notes:
Spent grain liquor, a brewery waste, was used as a fermentation medium for the production of citric acid by Aspergillus foetidus (formerly called A. niger NRRL 337.) The yields of citric acid varied from 3.5–12.3g/liter of the waste fermented, depending on the samples. On the basis of the reducing sugar consumed, the yields ranged from 42–58%. The added nitrogen compounds increased mycelial growth and the consumption of sugar, but markedly reduced the amount of citric acid formed. The addition of phosphate (KH2PO4) appeared to have little effect on mycelial growth and citric acid production. Methanol in concentrations of 2–4% markedly increased the formation of citric acid from the waste. There was a reduction in mycelial growth associated with the use of methanol.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1111/j.1365-2621.1977.tb01504.x
