• Possibilities of producing biogas from sewage sludge in municipal sewage treatment plants
  Biogas allows for the production of a significant amount of energy carrier from waste, which can be easily processed into other usable forms of energy. Methane and carbon dioxide, as the main components of biogas, are classified as gases causing the greenhouse effect, which is why biogas should be captured in a controlled manner. The basic element determining the improvement of the energy balance of sewage treatment plants is the possibility of using the energy accumulated in sewage sludge. Thanks to the use of closed, separate fermentation chambers, it is possible to significantly reduce operating costs at the sewage treatment plant, reduce greenhouse gas emissions. Biogas is relatively easy to produce at sewage treatment plants because sewage sludge largely consists of organic matter subject to the methane fermentation process. In the future, we can expect the design and construction of new biogas plants at sewage treatment plants, which will significantly increase their energy self-sufficiency... dalej
• Organizational models of oil and gas companies and their business and operational conditions as a model for the functioning of the Oil Concern ORLEN S.A. Discussion article
  One of the important arguments behind writing this article are the changes that have occurred over the last decade in the global oil and gas industry, including the recent changes that have taken place on the Polish business market in this area, which have been widely discussed in the Polish oil and gas industry. This refers not only to changes in ORLEN S.A. but also to changes in the second most important company in the oil and gas industry in Poland, i.e. PGNiG S.A., as well as the merger of these companies in a process called „merge operation” but not entirely subject to purely business principles from the point of view of listed companies subject to the provisions of the Commercial Law in particular [II]... dalej

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