Product recovery. The beer is separated into ethanol, water, and residual solids
by distillation and solid-liquid separation. Ethanol is distilled to a nearly azeotropic
mixture with water and then purified to 99.5% using vapor-phase molecular sieve
adsorption. Solids recovered from the distillation bottoms are sent to the combustor (Area
800) while the liquid is sent to wastewater treatment (Area 600).