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Economic analysis for biogas plant working at sugar factory

Ogrodowczyk D., Olejnik T. P., Kaźmierczak M., Brzeziński S., Baryga A.

Biotechnology and Food Science

2016

Vol. 80, nr 2

129--136

Biogas is produced by the biological processes of anaerobic methane fermentation. It is a mixture of methane, carbon dioxide and trace amounts of other gases. By-products of the sugar industry are an efficient source of agricultural biogas. Sugar beet pulp and waste mass plant is characterized by a high content of dry matter and organic dry. The purpose of this article was to develop the economic analysis for biogas plant working at sugar factory and to show the energy balances and material and then calculated the main economic indicators such as Cash Flow (CF), Net Present Value (NPV), Internal Rate of Return (IRR) and Discounted Payback Period (DPP). It was found that the biogas plant operating at a sugar factory can be a profitable investment and DPP amounted to 8 years. However, these results are estimates and in reality they may changed.

Tribocorrosion of a chromosiliconized layer

Bauer I., Baryga A.

Technical Sciences / University of Warmia and Mazury in Olsztyn

2013

nr 16(2)

85--92

The paper presents the results of an experiment investigating the tribocorrosion of C45 steel samples which were chromosiliconized by the powder-pack method. The technological process was carried out at 1000oC for 6 hours. The layer was produced with the use of ferrochromium powder combined with SiC, kaolin and ammonium chloride. Analytical samples were placed in boxes containing the powder mix, and the boxes were sealed with vitreous enamel. The frictional resistance of a chromosiliconized layer was investigated under exposure to a corrosive medium of sugar slurry. Corrosion damage was examined with the use of a three-cylinder and cone wear tester. The structure of the analyzed layers was evaluated by light and scanning microscopy, X-ray diffraction and glow discharge optical emission spectroscopy (GDOES). The thickness, surface roughness and hardness of samples were determined. Chromosiliconizing of C45 steel samples extended the life of friction elements in a sugar slurry environment.