The document describes the key steps in the distillery process: 1) Starch from grains or potatoes is cooked and enzymes are added to break it down into fermentable sugars. 2) The sugars are fermented by yeast into an alcoholic wash. 3) The wash undergoes distillation to produce a purified spirit which is then dehydrated to produce fuel ethanol or absolute alcohol.

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Distillery Plant
Overview

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Distillery Plant Overview
Starch
Liquefaction & Saccharification
Fermentable Sugar
Fermentation
Fermented Wash
Distillation
Rectified Spirit
Dehydration
Absolute Alcohol

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Distillery Plant Overview
Starch
Steam
PW
Flour
PW
ENL
ENL ENS
To
Fermenter
Slurry Mixer
Pre-Mixer
Jet Cooker
Holding Coil
Flash Vessel
Liquefaction Vessel PPSF Vessel
Milling
Cooking
Liquefaction
Saccharification
Attack by Alpha Amylase (ENL)
Attack by Glucosidase (ENS)
Sugar

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Distillery Plant Overview
CWS
CWR
CWS
CWR
CWS
CWR
Fermented
Wash
Molasses
Process Water
Air Air Air
CO2
Fermenter-I Fermenter-II Fermenter-III
Sugar to Alcohol
Fermentation
Feed Stock
Water
Yeast
CO2
Heat
Fermented
Wash
Yeast
C6H12O6 2C2H5OH + 2 CO2 + Heat

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Distillery Plant Overview
Distillation
Fermented
Wash
Rectified
Spirit
Spent
Wash
Impure
Spirit
Fusel
Oil
Spent
Lees
Fermented Wash to Rectified Spirit

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Distillery Plant Overview
Dehydration
Fuel
Alcohol
To
Vacuum
Pump
RS Vapors
Super-Heater
Adsorption Regeneration
Water
RS
Rectified Spirit to Fuel Ethanol

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Distillery Plant Overview