PROCESS FOR THE PRODUCTION OF LIPIDS FROM BIOMASS

摘要

Process for the production of lipids from biomass including at least one polysaccharide, which comprises fermentation of a biomass hydrolysate using an oleaginous microorganism and separation of oleaginous cellular biomass comprising lipids. An aqueous fraction obtained by reverse osmosis of a spent fermentation broth is recycled as a feed for growth of the oleaginous microorganism. The lipids thus obtained can be advantageously used in the production of biodiesel or green diesel which can be used as such, or in a mixture with other automotive fuels.

主权项

1. A process for the production of lipids from biomass including at least one polysaccharide, comprising:
subjecting said biomass including at least one polysaccharide to hydrolysis obtaining a mixture comprising a first solid phase and a first aqueous phase; preparing an inoculum comprising at least one oleaginous microorganism in a first fermentation device obtaining a first fermentation broth; feeding said first aqueous phase and said first fermentation broth to a second fermentation device obtaining a second fermentation broth; subjecting said second fermentation broth to separation obtaining an aqueous suspension of oleaginous cellular biomass comprising lipids and a second aqueous phase; subjecting said second aqueous phase to reverse osmosis obtaining a permeate and a retentate; feeding said retentate to said first fermentation device or to said second fermentation device.