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Biobutanol is an attractive advanced biofuel with superior fuel properties. It fits the existing fuel infrastructure; has a higher energy density (similar to petrol/gasoline) and has shown better performance properties than ethanol and biodiesel. However, it has not yet been established in the market due to some technical and economic barriers.
A two-step (mechanical-micronising & chemical-enzymatic pretreatment) versatile (for different types of lignocellulosic feedstocks and wastes including recalcitrant materials) and low cost (with a reduced energy demand between 15-25%) hydrolytic process. A tailor-made enzyme cocktail with reduced enzyme dosage and costs (up to 25%), adapted to the Clostridium butanol fermentation process. Improved next generation homo-fermentative microorganisms/strains using non-GMO techniques. High productivity fermentation with in-situ product recovery (ISPR). Techno-economic and sustainability assessment of the integrated process.
A process adapted to use a wide range of lignocellulosic feedstocks and wastes (agricultural residues, organic fraction of municipal solid waste -MSW-, regionally adapted energy crops) will facilitate commercial plant supply planning with subsequent improvements in economic benefits as well as overcoming sustainability concerns. The development of rural areas is considered as a direct consequence of the successful development and implementation and scale-up of the process using locally produced versions of the above-mentioned feedstocks.