NOVELTY - Drying solids-rich still residue derived from maize(P1), comprises: (a) introducing maize-derived glucose to aqueous fermenter comprising microorganism to ferment glucose into dilute fermentation product and carbon dioxide; (b) introducing dilute fermentation product to distillation unit configured to generate distillate and solids-rich still residue; (c) drying solids-rich still residue using drying gas; (d) cooling the dried solids stream using cooling gas in cooler, to generate cooled solids stream comprising distillers' dried grains with solubles (DDGS); and (e) recovering the DDGS.    USE - The process is useful for drying solids-rich still residue derived from maize.    ADVANTAGE - The process: does not require regenerative thermal oxidizer; can produce more edible maize oil than conventional processes; does not use hexane or other hydrocarbon solvents to produce edible maize oil; can produce a high-protein, solvent extracted meal, which can be more widely applied to mono-gastric animal feed diets (e.g. poultry and hogs); reduces residual ethanol (a VOC) in the DDGS; and reduce the energy usage and carbon footprint.    DETAILED DESCRIPTION - Drying a solids-rich still residue derived from maize (P1), comprises: (a) introducing maize-derived glucose to an aqueous fermenter comprising microorganism to ferment glucose into a dilute fermentation product and carbon dioxide; (b) introducing the dilute fermentation product to a distillation unit configured to generate a distillate (overhead) and a solids-rich still residue (still bottoms); (c) drying the solids-rich still residue using a drying gas in a counter-current dryer disposed in a vertically stacked dryer, to generate a dried solids stream; (d) cooling the dried solids stream using a cooling gas in a cooler disposed in communication with the vertically stacked dryer, to generate a cooled solids stream comprising distillers' dried grains with solubles (DDGS); and (e) recovering the DDGS. An INDEPENDENT CLAIM is also included for process (P2) for drying a solids-rich still residue derived from maize, comprising drying a maize-derived solids-rich still residue using a drying gas in a counter-current dryer disposed in a vertically stacked dryer, to generate a dried solids stream, cooling the dried solids stream using a cooling gas in a cooler disposed in communication with the vertically stacked dryer, to generate a cooled solids stream comprising distillers' dried grains with optional solubles and recovering the distillers' dried grains with optional solubles, where the distillers' dried grains with optional solubles has higher nutritional value than distillers' dried grains with optional solubles produced by an otherwise- equivalent process that does not utilize the vertically stacked dryer.