Lignocelluloses pretreatment

Kejrwords Maize silage Bioethanol Lignocellulose Pretreatment ... 

Recovery of side products during lignocellulose pretreatment... 

Kootstra, A. M. J., Mosier, N. S., Scott, E. L., Beeftink, H. H., Sanders, J. P. M. (2009). Differential effects of mineral and organic acids on the kinetics of arabinose degradation under lignocellulose pretreatment conditions. Biochemical Engineering Journal, 43,92—97. 

Several lignocellulose pretreatment processes have recently been developed that promise to be technically effective and affordable, and some of them are undergoing large scale testing and development. Advanced lignocellulose treatments include processing with ammonia and... 

Sathitsuksanoh, N., George, A., Zhang, Y., Percival, H. New lignocellulose pretreatments using cellulose solvents a review. Journal of Chemical Technology and Biotechnology, 2013,88(2), 169-180. 

Bioconversion platforms for lignocellulosics-to-ethanol are beginning to become commercially viable, but the effectiveness of the pretreatment stage should still be improved, the cost of the enzymatic hydrolysis stage decreased, and overall process efficiencies improved by better synergies between various process stages. There is also a need to improve process economics by creating co-products that can add revenue to the process. 

Biocatalytic conversion of lignocellulose into bioethanol, which requires upgrading of existing processes of fermenting sugars by using enzymatic-enhanced pretreatment of (hemi)cellulose. New, improved biocatalysts are needed for this route. 

Pretreatment of Substrate. Several different lignocelluloses were pretreated with NaOH. This pretreatment partially solubilizes the hemicelluloses and lignin and swells the cellulose so that the organism can utilize it for its growth and for production of a cellulase system in SSF. The treated lignocelluloses were not washed. The NaOH treatment is done with a minimum amount of water so that, after the addition of nutrient solution and inoculum, the moisture content is less than 80% wt/wt and there is no free water in the medium. More water was added to make suspensions of different lignocellulosic substrates of the desired concentration (1% or 5%) for liquid-state (submerged) fermentation (LSF). 

Weil, J., et al. Cellulosic Pretreatments of Lignocellulosic Substrates, Enz. Microb. Technol, 16. 1002-1004 (1994b). 

Several definitive reviews on pretreatment of lignocellulosic materials for improving cellulose hydrolysis (1,2,3) appeared a few years ago. More recently, two pretreatment methods (the Purdue process and the Iotech process) have been announced that claim superior perform-... 

Many pretreatments have been employed to enhance the degradation of lignocellulosic materials to glucose. The treatments fall into two general areas (Ryu and Lee, 1983) ... 

Mosier N, Wyman C, Dale B, Elander R, Lee YY, Holtzapple M, Ladisch M. 2005. Features of promising technologies for pretreatment of lignocellulosic biomass. 

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