|Renewable biological systems for alternative sustainable energy production. (FAO Agricultural Services Bulletin - 128) (1997)|
|Chapter 3 - Production of fuel alcohol from cellulosic biomass|
|3.5 Alcohol production using an integrated pilot plant|
In order to improve the efficiency of alcohol fermentation, UF-filtered sugar solutions which were also free of enzyme were passed through a polyamide, spiral-type RO membrane, enabling them to be concentrated from between 3 and 15% to a final concentration of approximately 30%. Using this loose RO system, more than 95% of the sugar was recovered over an extended period.