By-products from fermentation still bottoms

Details By-products from fermentation still bottoms By-products from fermentation still bottoms

2007-04-27

2009-08-04

Prince, Fred (Department: 1797)

Liquid purification or separation

Processes

Treatment by living organism

C210S641000, C210S650000, C210S652000, C203SDIG025, C426S066000

Reexamination Certificate

active

07569146

ABSTRACT:
The disclosed invention is an improved method for treating ethanol distillation still bottoms by recovering, through solids separation and pressurized membrane filtration, potable water from still bottoms for human consumption by bottling or for reuse, and concentrating the solids with beneficial properties recovered such as chemicals, nutrients and medicinals before anaerobic digestion. The invention is an improved process because it can reduce the volume of solids to manage, recovers the water from the fermentation still bottoms while pasteurized, maintains the chemical arid physical properties of solids for beneficial property recovery, improves ethanol and energy efficiency, and results in clean discharge to the environment including carbon dioxide recovery. A bioreactor produces a gas rich in methane fuel from the concentrate to power the pressurized tiltration process and an aqueous ammonia solution to recover or recycle. This invention improves environmental quality, conserves energy, and produces a beverage water for bottling that can be of an organic origin with reliable source and quality.

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O'Bryan et al “Developing Enzyme Systems for Converting Pretreated DDGS to Fermentable Sugars” National Center for Agricultural Utilization Research, Peoria, IL Midwest Consortium for Biobased Products & Bioenergy & DOE Grant #DE-FG36-04G014220 off Internet copy attached date unknown.

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