Abstract: The present invention relates to an improved method for preserving grain by-products, aka “co-products,” such as wetcake, mash, silage, brewers' cake, and fine distiller's solubles (“syrup”), generated in the production of ethanol products and industrial grade ethanol (“ethanol process”), comprising treating these materials with an effective amount of probiotics, or lactic acid, bacteria, and inhibiting mold growth.

Abstract: Organic substrates such as grain by-products: wet cake, mash, stillage, wet brewers cake are dewatered in a relatively low energy, low-heated gas flow, negative pressure, four stage process consisting of leaching with organic solvent, mechanical dewatering, evaporation and reclamation of the organic solvent in an environment of a stable gas flow. The dried organic substrate is processed into a dry distiller's grains with solubles which is free-flowing quality substance suitable for food or other uses at much lower substrate drying temperatures generally below 200° F. Conveniently, the solvent and the stable gases are recovered from the water-solvent leaching and dewatering process by a distillation tower and feedback loop system allowing the recycling of the solvent and stable gas while reducing the level of air emissions in the unique drying system.