Non-sterile fermentation of bioethanol
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United States of America Patent
Stats
-
Apr 22, 2014
Issued Date -
N/A
app pub date -
Jan 24, 2012
filing date -
Dec 21, 2007
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A range of concentrations exists in which fermentation inhibitors derived from pretreatment of lignocellulosic feed stocks inhibit growth of lactic acid bacteria without affecting fermentive yeast. By optimizing levels of fermentation inhibitors to fall within this range, yeast fermentations of lignocellulosic biomass can be conducted under non-sterile conditions with ethanol yields comparable to those achieved under sterile conditions. Optimised inhibitor levels can be achieved by controlling the water/biomass ratio of a lignocellulosic biomass during and after pretreatment, for example by washing the fiber fraction of a previously pretreated lignocellulosic biomass with a pre-defined amount of fresh water or recycled process solutions. Crude extracts of liquid fraction or process solutions from pretreatment of lignocellulosic biomass can also provide an effective anti-baterial treatment for first generation starch fermentations.
First Claim
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International Classification(s)
- 2012 Application Filing Year
- C12P Class
- 1680 Applications Filed
- 1225 Patents Issued To-Date
- 72.92 % Issued To-Date
Cited Art Landscape
Patent Citation Ranking
- 2 Citation Count
- C12P Class
- 25.47 % this patent is cited more than
- 11 Age
Maintenance Fees
| Fee | Large entity fee | small entity fee | micro entity fee | due date |
|---|---|---|---|---|
| 11.5 Year Payment | $7400.00 | $3700.00 | $1850.00 | Oct 22, 2025 |
