Contaminant control in
View Patent ↗Contamination was controlled in fermentations using Zymomonas mobilis as the biocatalyst, without negative impact on fermentation production, by the addition of virginiamycin. The effective concentration of virginiamycin was found to be dependent upon the type of fermentation medium used.
1. A fermentation broth composition comprising:
a) fermentation medium;
b) virginiamycin at a concentration of at least about 10 ppm; and
c) a growing population of Zymomonas cells.
2. The fermentation broth of claim 1 wherein the fermentation medium lacks cellulosic biomass hydrolysate.
3. The fermentation broth of claim 1 wherein the fermentation medium comprises cellulosic biomass hydrolysate.
4. The fermentation broth of claim 1 wherein the virginiamycin concentration is at least about 20 ppm.