A method of and a system for controlling the culture growth of high value feed organisms in a co-fermented system that produces ethanol and for the culture to consume both nonprotein and carbohydrate based products. The method and system produce products that enhance the nutritional value of the co-products. The method further provides a system to grow unique value added co-products, including a mycotoxin-free animal feed, for the monogastric and ruminant animal feed markets including aquaculture, poultry, swine, companion animals and livestock animals. The method includes the production of organic acids to enrich animal feed for enhanced animal performance with reduced antibiotic components in the feed. The method includes the production and incorporation of probiotics in the animal feed product.
