A process for producing a microbial growth stimulant (MGS) from a plant biomass is described. An ammonium hydroxide solution is used to extract a solution of proteins and ammonia from the biomass. Some of the proteins and ammonia are separated from the extracted solution to provide the MGS solution. The removed ammonia can be recycled and the proteins are useful as animal feeds.
STATEMENT REGARDING FEDERALLY SPONSORED RESEARCH OR DEVELOPMENT
 This research was under a grant from the United States Department of Energy (USDOE) Contract No. DE-FG36-04GO-14220. THE U.S. GOVERNMENT HAS CERTAIN RIGHTS TO THIS INVENTION.