Abstract: Biogas production from the anaerobic digestion of juice in an ethanol production plant is maximized by mixing a juice containing thin stillage and/or water with a concentrated syrup prior to the anaerobic digestion. The juice then can be mixed with a biomass such as corn meal and enzymes to form a slurry suitable for fermentation. Sufficient syrup is mixed into the juice to provide a BOD concentration in the juice between 100,000 and 150,000 ppm. Enough biogas can be produced to supply enough energy to meet all of the boiler steam production/distillation energy/electrical generation demands for the ethanal production plant with some excess biogas left over for other uses.

Abstract: An integrated bioethanol production and evaporation process and system produce reduces high quality ethanol and concentrated stillage. The process and system provide a significant energy savings over conventional bioethanol production and evaporation systems by using the energy (“vapor”) that drives the distillation process to also drive a multiple effect evaporator, preferably a multiple effect TASTE™ evaporator to “flash” or vaporize alcohol from the distillate. Additional energy savings are provided by passing fermented material through one or more pre-heaters of the multiple effect evaporator to increase the temperature of the fermented material prior to its distillation. The system preferably includes a pre-flash evaporator upstream of an alcohol recovery assembly in the direction of vapor flow and a multi-effect post-flash evaporator downstream of the alcohol recovery assembly.

Abstract: An integrated bioethanol production and evaporation process and system produce reduces high quality ethanol and concentrated stillage. The process and system provide a significant energy savings over conventional bioethanol production and evaporation systems by using the energy (“vapor”) that drives the distillation process to also drive a multiple effect evaporator, preferably a multiple effect TASTE™ evaporator to “flash” or vaporize alcohol from the distillate. Additional energy savings are provided by passing fermented material through one or more pre-heaters of the multiple effect evaporator to increase the temperature of the fermented material prior to its distillation. The system preferably includes a pre-flash evaporator upstream of an alcohol recovery assembly in the direction of vapor flow and a multi-effect post-flash evaporator downstream of the alcohol recovery assembly.