Artykuły BioTrainValue / BioTrainValue Articles
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Pozycja Regression Analysis of the Impact of Foreign Direct Investments, Adjusted Net Savings, and Environmental Tax Revenues on the Consumption of Renewable Energy Sources in EU Countries(MDPI Open Access Journals, 2024) Kukharets, Valentyna; Čingiene, Rasa ; Juočiūnienė, Dalia; Kukharets, Savelii ; Blažauskas, Egidijus ; Szufa, Szymon ; Muzychenko, Andrii ; Belei, Svitlana ; Lahodyn, Nazar ; Hutsol, Taras ; Department of Applied Economics. Finance and Accounting, Agriculture Academy. Vytautas Magnus University. Kukharets, Valentyna and Juočiūnienė, Dalia.; Department of Agricultural Engineering and Safety. Agriculture Academy. Vytautas Magnus University. Čingiene, Rasa and Blažauskas, Egidijus.; Department of Mechanical, Energy and Biotechnology Engineering. Agriculture Academy. Vytautas Magnus University. Kukharets, Savelii.; Department of Agricultural Engineering. Odesa State Agrarian University. Kukharets, Savelii.; Faculty of Process and Environmental Engineering. Lodz University of Technology. Szufa, Szymon.; Department of Statistics and Economic Analysis. National University of Life and Enviromental Sciences of Ukraine. Muzychenko, Andrii.; Department of Business Economics and Human Resource Management. Ukraine Yury Fedkovich Chernivtsi National University. Belei, Svitlana and Lahodyn, Nazar.; Ukrainian University in Europe—Foundation. Hutsol, Taras.; Department of Mechanics and Agroecosystems Engineering, Polissia National University. Hutsol, Taras.It is very important for EU countries to achieve energy independence. But this is actually impossible without a high level of use or consumption of renewable energy (RE) sources. Important parameters affecting the consumption of RE sources are as follows: foreign direct investments (FDI), adjusted net savings (ANS), and environmental tax revenues. In the presented work, the likely impact of the above indicators on the level of use of RE sources was estimated using a second-order regression equation. As a result, it was established that the growth of the adjusted net savings indicator and an increase in environmental tax revenues (ETR) have a positive effect on the level of use of RE sources. With significant FDI, the level of ANS does not have a very obvious effect on the growth of the level of use of RE sources. An increase in the level of ANS allows for an increase in ETR, which in turn contributes to an increase in the level of consumption of RE sources. It was also established that an increase in the level of ANS contributes to a more complete realization of the potential of FDI for the development of RE. It has been empirically established that a consistently high consumption of renewable energy sources is actually possible in the countries with a high level of adjusted net savings, high environmental tax revenues, and active attraction of foreign direct investments.Pozycja Harnessing Switchgrass for Sustainable Energy: Bioethanol Production Processes and Pretreatment Technologies(MDPI Open Access Journals, 2024) Unyay, Hilal; Perendeci, Nuriye, Altınay ; Piersa, Piotr; Szufa, Szymon; Skwarczynska-Wojsa, Agata; Faculty of Process and Environmental Engineering, Lodz University of Technology. Unyay, Hilal and Piersa, Piotr and Szufa, Szymon.; Department of Environmental Engineering. Akdeniz University. Perendeci, Nuriye, Altınay.; Department of Water Purification and Protection. Rzeszow University of Technology. Skwarczynska-Wojsa, Agata.This paper investigates bioethanol production from switchgrass, focusing on enhancement of efficiency through various pretreatment methods and comparing two bioethanol production processes: simultaneous saccharification and fermentation (SSF) and separate hydrolysis and fermentation (SHF). Physical, chemical, and biological pretreatment processes are applied to enhance the breakdown of switchgrass’s lignocellulosic structure. Effects of pretreatments, enzymatic hydrolysis, and fermentation on ethanol yield are discussed in detail. The comparative analysis reveals that SSF yields higher ethanol outputs within shorter times by integrating hydrolysis and fermentation into a single process. In contrast, SHF offers more control by separating these stages. The comparative analysis highlights that SSF achieves higher ethanol yields more efficiently, although it might restrict SHF’s operational flexibility. This study aims to provide a comprehensive overview of the current pretreatments, hydrolysis methods, and fermentation processes in bioethanol production from switchgrass, offering insights into their scalability, economic viability, and potential environmental benefits. The findings are expected to contribute to the ongoing discussions and developments in renewable bioenergy solutions, supporting advancing more sustainable and efficient bioethanol production techniques.Pozycja Batch rolling-bed dryer applicability for drying biomass prior to torrefaction(Elsevier, 2025) Szufa, Szymon; Unyay, Hilal; Pakowski, Zdzislaw; Piersa, Piotr; Siczek, Krzysztof; Kabaciński, Mirosław; Sobek, Szymon; Moj, Kevin; Likozar, Blaž; Kostyniuk, Andrii; Junga, Robert; Faculty of Process and Environmental Engineering. Lodz University of Technology. Szymon Szufa, Hilal Unyay, Zdzislaw Pakowski, Piotr Piersa.; Department of Vehicles and Fundamentals of Machine Design. Lodz University of Technology. Krzysztof Siczek.; Department of Thermal Engineering and Industrial Facilities. Opole University of Technology. Kabaciński, Mirosław and Junga, Robert.; Department of Heating, Ventilation, and Dust Removal Technology. Silesian University of Technology. Sobek, Szymon.; Faculty of Mechanical Engineering. Opole University of Technology. Moj, Kevin.; Department of Catalysis and Chemical Reaction Engineering. National Institute of Chemistry. Likozar, Blaž and Kostyniuk, Andrii.This study investigates the suitability of a pilot-scale batch rolling-bed dryer for drying pine wood chips intended for torrefaction. The batch rolling bed dryer emerges as an ideal solution for further processes like torrefaction, offering a compact design and a wide range of operational parameters. Compared to rotary dryers, it occupies less volume, providing greater efficiency. Additionally, its adjustable drying airflow and compatibility with various biomass forms and particle sizes enhance its versatility. The volumetric evaporation rate was found 13.9 kg/m3 per hour for the total dryer volume and 78.8 kg/m3 for the bed volume. Mechanical tests demonstrate satisfactory operation, with potential for further optimization through impeller blade design improvements. The study also presents a simple model using the CDC modeling approach, successfully describing drying curves in most experiments, albeit with some limitations in temperature curve simulations. Overall, the rolling bed dryer proves to be a convenient solution for drying wood chips as a pretreatment for steam torrefaction, offering ease of operation and promising potential for application in continuous torrefaction lines.Pozycja Reduction of spruce phytotoxicity by superheated steam torrefaction and its use in stimulating the growth of ecological bio‑products: Lemna minor L(Springer Nature, 2025) Szufa, Szymon; Unyay, Hilal; Piersa, Piotr; Kędzierska‑Sar, Aleksandra; Romanowska‑Duda, Zdzislawa; Likozar, Blaz; Faculty of Process and Environmental Engineering. Lodz University of Technology. Szymon Szufa, Hilal Unyay, Piotr Piersa & Aleksandra Kędzierska-Sar.; Faculty of Biology and Environmental Protection. University of Lodz. Zdzislawa Romanowska-Duda.; Department of Catalysis and Chemical Reaction Engineering, National Institute of Chemistry. Szymon Szufa & Blaz Likozar.The use of biochar in agriculture is associated with the concepts of "carbon sink" and "carbon negative," which will constitute additional income for farms in the near future and may provide them with a key role in the fight against global warming. The existing model in the Scandinavian countries is one of the first to combine biochar with carbon dioxide biosequestration. Fertilizers with excessive nutrient content, salinity issues, impurities, or irregular pH levels can induce phytotoxicity, damaging plant health and growth. Torrefied woody biomass can work as a bulking agent, carbon carrier, or as an mendment for composting materials containing high amounts of water and/or nitrogen contents. Superheated steam torrefaction as a valorization process increases the amount of pores in which minerals can be stored and the plant will grow faster and bigger by using these pores agglomerated minerals. The torrefaction process was conducted using the DynTHERM TG Rubotherm high-temperature and high-pressure thermogravimetric analysis apparatus under conditions of superheated steam flow. Various residence times (10, 20, and 40 min) and torrefaction temperatures (250, 275, and 300 °C) were explored to assess their efficacy in reducing the phytotoxicity of torrefied spruce. To confirm this assumption, a toxicity test with Lemna minor L. was carried out according to Radić et al. (2011) and extended to the determination of chlorophyll index and chlorophyll fluorescence to assess the physiological status of the plants after treatment with different doses of spruce wood biocarbon. Research indicates that biochar positively impacts soil quality and plants. Thanks to its unique properties, biochar provides nutrients, enhancing fertilization efficiency [1]. Biochar, after concentrating and adsorbing the nutrients from the wastewater, can be used as a soil amendment or fertilizer. Biochar blended with organic residues full of nutrients is more effective in improving soil properties and crop yields than the exclusive application of pure biochar or other fertilizers. Traditional chemical fertilizers have drawbacks, such as rapid nutrient leaching, severe environmental pollution, and high costs. Therefore, biochar is gaining increasing recognition worldwide.