Method of continuous treatment of grain mash for producing ethanol
AssigneeProcess Engineering, Inc.
InventorRolf H. Kretz
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Abstract
A method of continuous treatment of grain mash for production of ethanol includes enzymatic liquefying of starch-containing particles of raw material in a liquefying container, separating not decomposed coarser particles of raw material in the container, withdrawing the coarse particles of raw material from the container and comminuting the same, and recirculating the comminuted particles of raw material into the container. The starch-containing particles are not ground very fine such as to pass through 1-3 mm diameter sieve openings, and coarse particles withdrawn from the container are comminuted to a fine particle size preferably with a wet comminuting device. By this method, fine particles are obtained with low energy consumption.
Claims10
A method of producing grain mash for producing ethanol, comprising the steps of comminuting a starch-containing raw material in a comminuting device with sieve openings of about 1-3 mm diameter to produce particles of the starch-containing raw material, enzymatic liquefying the starch-containing particles of raw material in a liquefying container in the form of a sedimentation container, continuously separating non-decomposed coarser ones of the particles of raw material in the container, continuously withdrawing the separated coarser particles of raw material from the container, continuously comminuting the withdrawn coarse particles in a wet comminuting device to a substantially smaller particle size, and continuously recirculating the smaller particles of raw material from the wet comminuting device into the liquefying container.
Dependencies are inferred from the claim text.