Methods for reducing enzyme consumption in second generation bioethanol fermentation in the prescence of lignin
US7972826B2 · kind B2 · utility
5Cited by
2References
19Claims
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Key dates
| Filing date | Feb 2, 2009 |
| Grant date | Jul 5, 2011 |
| Priority date | — |
| Expiry date | Feb 2, 2029 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02E50/10
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
Provided are methods of liquefaction, saccharification and fermentation of pre-treated lignocellulosic biomass in production of bioethanol. Addition of PEG or surfactant is effective to enhance cellulase hydrolysis yields at high dry matter (>20%) at surprisingly low concentrations compared with comparable results in low dry matter hydrolysis. This effect is most pronounced at comparatively low cellulase loading <7 FPU (g DM)−1. At high dry matter content, cellulase enzyme consumption can be reduced, without loss of hydrolysis yield, by addition of small quantities of PEG or surfactant.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.