The process of methane fermentation of stillage was described in this article. Also the rheological properties of stillage and digested sludge obtained on the anaerobic digestion process of stillage was presented. The ratio between the shear stress and viscosity to shear rate has allowed define the tested liquids and plot a flow curve and viscosity curve. Based on the obtained results the mathematical model describing the flow curves of the liquid was matched.
The process of methane fermentation of stillage was described in this article. Also the rheological properties of stillage and digested sludge obtained on the anaerobic digestion process of stillage was presented. The ratio between the shear stress and viscosity to shear rate has allowed define the tested liquids and plot a flow curve and viscosity curve. Based on the obtained results the mathematical model describing the flow curves of the liquid was matched.
The subject of the article refers to the second generation biofuels and the importance and applicability of chemical and enzymatic pretreatment of lignocellulosic biomass in destiny to anaerobic digestion. We paid particular attention to the influence of chemical pretreatment of lignocellulosic biomass of different raw materials to decompose polysaccharides to products used in the process of anaerobic digestion. Also discusses the economic and environmental benefits of biogas production from lignocellulosic raw materials.
The subject of the article refers to the second generation biofuels and the importance and applicability of chemical and enzymatic pretreatment of lignocellulosic biomass in destiny to anaerobic digestion. We paid particular attention to the influence of chemical pretreatment of lignocellulosic biomass of different raw materials to decompose polysaccharides to products used in the process of anaerobic digestion. Also discusses the economic and environmental benefits of biogas production from lignocellulosic raw materials.
The article gives the use of rye stillage by during cultivation process of fodder yeast Candida utilis and Candida tropicalis. Experiments concerned the impact of fodder yeast culture on the amount of protein formed in during cultivation process on stillage. In this studies were also conducted research with an additional carbon source to increase the yield of protein by yeast. On the basis of the results obtained it was found the highest increase of yeast biomass in the case of the application of two strains of yeast: Candida utilis and Candida tropicalis by cultivation process on rye stillage. The use of nitrogen and phosphorus in the form of mineral compounds in cultivation process resulted in an increase the amount of biomass of yeast in the stillage.
The article gives the use of rye stillage by during cultivation process of fodder yeast Candida utilis and Candida tropicalis. Experiments concerned the impact of fodder yeast culture on the amount of protein formed in during cultivation process on stillage. In this studies were also conducted research with an additional carbon source to increase the yield of protein by yeast. On the basis of the results obtained it was found the highest increase of yeast biomass in the case of the application of two strains of yeast: Candida utilis and Candida tropicalis by cultivation process on rye stillage. The use of nitrogen and phosphorus in the form of mineral compounds in cultivation process resulted in an increase the amount of biomass of yeast in the stillage.
This paper presents results of the research on impact of microstructure of austenitic-ferritic steel of duplex type on its mechanical properties and susceptibility to stress corrosion cracking. As showed, improper processing technologies more and more often used in shipbuilding industry for plates and other half-finished products made of duplex steel may cause significant lowering their properties, which frequently makes their replacing necessary. Results of the tests on stress corrosion under tension with low strain rate (SSRT) conducted in an inert and corrosion (boiling magnesium chloride) environment , are presented. It was proved that even minor structural transformations taking place in 500ºC ageing temperature lower corrosion resistance of the steel. Structural transformations occurring in 700ºC temperature to a smaller extent influence susceptibility to stress corrosion of the steel, however they cause drastic drop in its plasticity