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In order to use Moroccan beet pulp and sugarcane bagasse for the production of bioethanol, we conducted in present work a comparative analysis of different methods published in the literature and those currently employed in the industry for the production of bioethanol. Based on technical and economic criteria the chemical process with dilute sulfuric acid was chosen for the first and the second step...
We have been trying to accelerate ethanol fermentation of yeast (Saccharomyces serevisiae). We observed the effect of D.C. voltage application on sugar content and the number of living yeast bacteria in liquid fermentation medium. The amount of sugar consumption by yeast in the medium with D.C. voltage application is larger than that without D.C. voltage application. The number of living yeast bacteria...
Bamboo is so easy to moulding that bamboo products haven't been high value added utilization. Therefore, the effect of wood extractives molecules on bamboo biology moulding was studied based on full-factor test. The result is: (1) The effect of tree species of wood extractives on bamboo biomass moulding was highly remarkable. The effect of treatment time on bamboo biology moulding was not remarkable...
The isolation and identification of a hyper-cellulytic fungus for cellulase gene selection was carried out as the initial stages in the production of a recombinant micro-organism. This would be capable of Consolidated BioProcessing (CBP) of cellulosic material to ethanol in single stage fermentations. With the selection of an organism with high cellulytic rate, the construction of a cellulytic ethanogen...
Two kinds of physical methods, vacuum evaporation and steam stripping, combined with overliming (calcium hydroxide) were applied to remove inhibitors which were produced simultaneously during the pretreatment of lignocellulosic biomass. Corn stover was steam exploded; the filtrate was hydrolyzed with dilute sulfuric acid. The acid hydrolyzate was then detoxified and fermented by yeast. Physical methods...
In this paper, the nonlinear stochastic dynamical system of batch fermentation is investigated in the process of glycerol bio-dissimilation to 1,3-propanediol by klebsiella pneumoniae. Both the patterns of microbial growth and metabolism and formation of fermentation products are strongly effected by bioreactor conditions and fermentation control. Bioreactor conditions and some operations in culture...
Biotechnological processes represent a challenge into the control field, due to its high non linearity. Particularly, continuous alcoholic fermentation by Zymomonas mobilis (Z.m) presents high ethanol performance, but it shows a highly oscillatory behavior in process variables, because of the influence of inhibition dynamics over Biomass, Substrate and Product concentrations; it is a significant challenge...
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