Iryna Vaskina

RESEARCH, TEACHING, or OTHER INTERESTS

Environmental Engineering, Waste Management and Disposal, Renewable Energy, Sustainability and the Environment, Pollution

Scopus Publications

Energetic Potential of Tobacco Waste Within Combustion or Anaerobic Digestion †
Patrycja Pochwatka, Alina Kowalczyk-Juśko, Marek Pituła, Andrzej Mazur, Iryna Vaskina, and Jacek Dach
MDPI AG
The growing demand for energy biomass encourages the use of waste and by-products from agriculture. The aim of this study was to assess the suitability of tobacco stalks (TSs) for energy use in the combustion and anaerobic digestion (AD) process, as well as the technical and environmental effects of energy production from this waste raw material. Laboratory tests were conducted on the energy parameters of TS biomass, the chemical composition of ash from its combustion, and the efficiency and composition of biogas generated during the AD process of TS silage with various silage additives. The tests were conducted in accordance with the standards applicable to biomass fuels. The energy yield and emission reduction obtained by the replacement of conventional energy sources were calculated. The energy parameters of TS were inferior compared to the raw materials most often burned in boilers (wood, straw). The high ash content (7.31% in dry mass) and its chemical composition may adversely affect heating devices. Methane yield from TS silage was lower (18.55–24.67 m3/Mg FM) than from silage from crops grown for biogas plants (i.e., 105 m3/Mg for maize silage). Silage additives improved TS silage quality and methane yield (from 18.55 to 21.71–24.67 m3 CH4/Mg in case of silages with additives. Energy yield and emission reduction were higher in the case of TS combustion, but AD is a process consistent with the circular economy. Both TS energy management processes are in line with the Sustainable Development Goals as they prevent the devaluation of agricultural waste, providing a valuable resource for bioenergy.


The Effect of Corn Ensiling Methods on Digestibility and Biogas Yield
K. Kupryaniuk, K. Witaszek, Iryna Vaskina, Sebastian Filipek-Kaźmierczak, Jakub Kupryaniuk, P. Sołowiej and J. Dach

This study investigates the impact of different corn silage preparation methods, namely the traditional and Shredlage methods, on digestibility and biogas yield in anaerobic digestion and its nutritional value—the first complex study of its kind. Key parameters of both silage types were analyzed, including chemical composition, fiber content, and elemental makeup. Methane and biogas production were assessed under standardized fermentation conditions. The results showed that the Shredlage method, characterized by more intensive chopping, led to higher biogas and methane yields per unit of organic dry matter compared to traditional silage. This improvement is attributed to enhanced digestibility due to the lower content of neutral detergent fiber (NDF), acid detergent fiber (ADF), and crude fiber in Shredlage. An elemental analysis revealed slight differences in carbon-to-nitrogen (C/N) ratios, with both silages showing values suitable for efficient fermentation. Despite minor variations in mineral content, Shredlage demonstrated greater efficiency in biogas production, particularly for rapid fermentation processes. The findings underscore the importance of silage preparation techniques in optimizing biogas yield and suggest Shredlage as a superior option for enhancing energy recovery in biogas plants. Future work should explore the economic trade-offs and scalability of these methods.


Integration of Plant Pomace into Extruded Products: Analysis of Process Conditions, Post-Production Waste Properties and Biogas Potential
Jakub Soja, Tomasz Oniszczuk, Iryna Vaskina, Maciej Combrzyński, and Agnieszka Wójtowicz
MDPI AG
Waste streams from cereal-based food production processes, rich in organic matter and carbohydrates, have untapped potential for biogas production. This study uniquely investigated the extrusion-cooking process conditions, physical properties and biogas efficiency of snack pellets enriched with plant pomace (apple, chokeberry, pumpkin, flaxseed and nigella seeds) at different levels (10, 20 and 30%), produced using a single-screw extruder-cooker. The highest efficiency obtained in the extrusion-cooking process (18.20 kg/h) was observed for pellets with the addition of 30% flaxseed pomace. The SME value during the entire process was in the range of 0.015–0.072 kWh/kg. New insights into the interaction between the inclusion of pomace, the physical properties of the extrudate and the anaerobic fermentation efficiency were obtained. The results show that 30% chokeberry extrudate maximized methane production (51.39% gas), demonstrating a double innovation: improving snack pellet quality and converting food waste into renewable energy.


Evaluation of Changes in the Chemical Composition of Grasses as a Result of the Methane Fermentation Process and Biogas Production Efficiency
Bogusława Waliszewska, Hanna Waliszewska, Mieczysław Grzelak, Leszek Majchrzak, Eliza Gaweł, Maciej Murawski, Agnieszka Sieradzka, Iryna Vaskina, and Agnieszka Spek-Dźwigała
MDPI AG
Methane fermentation, which is one of the key processes in biogas production, plays an important role in the conversion of biomass to energy. During this process, changes occur in the chemical composition of organic feedstocks, including the chemical composition of grasses. The assessment of these changes is crucial for the efficiency and productivity of biogas production. The material for this study comprised fully mature grass blades with leaves and inflorescences and was collected from extensively used meadows and pastures, as well as cultivated and set-aside areas in the Wielkopolskie Voivodeship, the communes of Białośliwie and Trzcianka, Poland. The aim of this study was to compare methane fermentation efficiency in nine grass species and identify the biomass component involved in biogas production. The results indicate that the fermentation process, as expected, changed the cellulose content. The lignin content of the grasses before fermentation varied more than the cellulose content. The content of holocellulose (sum of carbohydrate components) in the grasses ranged from 59.77 to 72.93% before fermentation. Methane fermentation significantly reduced the carbohydrate content in the grasses, with a low degree of polymerization. Grassland biomass-based biogas production is a viable alternative to conventional fossil fuels.


Potential of Landfill Gas Extraction in North-East Ukraine
Iryna Vaskina, Dmytro Hopkalo, Roman Vaskin, and Patrycja Pochwatka
Wydawnictwo Naukowe Gabriel Borowski (WNGB)
The energy potential of municipal solid waste landfills receded into the background compared to more traditional sources of energy. Such possibilities as landfill degassing, as well as extraction of thermal energy from the depths of landfills, were little-researched, due to being kind of risky phenomena for their wide application. Currently, the energy system of Ukraine is under the risk as due to the military actions – objects of critical energy infrastructure have become the easy targets for the enemy. About 53 mln m 3 of household waste were generated in Ukraine in 2021. Over 10 mln tons were buried at 6000 of landfills, total area of which accounts for 9000 hectares. The en - ergy potential of these waste was used ineffective. Only 28 landfills of total have the degassing system established. The case of using landfill gas as an energy source lies between such challenges: the increasing amount of MSW, proper waste management and the energy crisis in Ukraine caused by the shellings. Landfill spreading throughout the country makes it possible to operate safely and reduce the risk of bringing any significant damage to such infrastructure. The study was focused on the Sumy City landfill, the potential of which is estimated as 36397 m 3 /t of solid waste. The degassing system was designed based on the methodology of State building regulations of Ukraine. Analysis of the efficiency of the system was done, including the potential energy output as a result of operation of such a system which comes paramount in dealing with the imperative of soaring amount of MSW, reducing greenhouse gas emissions and producing green, cheap energy. The negative impact of MSW landfills on the environment is beyond all dispute so it is crucial that their potential be used at full capacity.


Assessment of the reliability of the operation of a sewage treatment plant using Monte Carlo simulation
Karolina Migdał, Agnieszka Operacz, Iryna Vaskina, Paulina Śliz, Jorge Tavares, Adelaide Almeida, and Michał Migdał
Polish Academy of Sciences Chancellery
: The aim of the study was to model the operation of a wastewater treatment plant using the Monte Carlo method and selected probability distributions of random variables. Pollutant indices in treated wastewater were analysed, such as: biological oxygen demand ( BOD 5 ), chemical oxygen demand ( COD Cr ), total suspended solids ( TSS ), total nitrogen (N tot ), total phosphorus (P tot ). The preliminary analysis of pollution indicators series included the: calculation of descriptive statistics and assessment of biological degradability of wastewater. The consistency of the theoretical distributions with the empirical ones was assessed using Anderson–Darling statistics. The best-fitting statistical distributions were selected using the percent bias criterion. Based on the calculations performed, it was found that the analysed indicators of pollution in treated wastewater were characterised by an average variability of composition for BOD 5 , COD Cr and TSS , and a high variability of composition for N tot and P tot . The best fitted distribution was log-normal for BOD 5 , TSS , N tot and P tot and general extreme values for COD Cr . The simulation carried out using the Monte-Carlo method confirmed that there may be problems associated with the reduction of nutrients (N tot and P tot ) the analysed wastewater treatment plant. Results of values obtained of the risk values of negative control of wastewater treatment plant operation for biogenic compounds, different from 1, indicate that the number of exceedances at the outflow may be higher than the acceptable one.


Influence of the Magnetic Field Gradient on the Efficiency of Magnetic Water Treatment
Ihor Roi, Iryna Vaskina, Krzysztof Jozwiakowski, Roman Vaskin, and Ivan Kozii
Springer International Publishing



Study of the magnetic water treatment mechanism
Iryna Vaskina, Ihor Roi, Leonid Plyatsuk, Roman Vaskin, and Olena Yakhnenko
Wydawnictwo Naukowe Gabriel Borowski (WNGB)
The main problem of widespread introduction of magnetic water treatment (MWT) in the processes of water and wastewater treatment is the lack of modern research aimed at studying the mechanisms of MWT effects, in particular the influence on the physicochemical properties of aqueous solutions. This study explains the effect of MWT taking into account the physical and chemical properties of aqueous solutions due to the presence of the quantum differences in water molecules. All of the MWT effects are related to the change in the physicochemical properties of aqueous solutions. It is due to the presence of two types of water molecule isomers and their librational oscillations. The result of MWT is a violation of the synchronism of para-isomers vibrations, with the subsequent destruction of ice-like structures due to the receiving of energy from collisions with other water molecules (ortho-isomers). One of the most important MWT effects includes the change in the nature and speed of the physicochemical processes in aqueous solutions by increasing the number of more physically and chemically active ortho-isomers. The MWT parameters specified in the work allow explaining the nature of most MWT effects and require developing the scientific and methodological principles for the implementation of the MWT process and mathematical modeling of the MWT process in the water and wastewater treatment. It can be used in the design of the MWT devices taking into account the constructive and mode parameters of MWT devices.


Patterns of pollutants distribution from vehicles to the roadside ecosystems
Iryna Vaskina, Leonid Plyatsuk, Roman Vaskin, Iryna Ablieieva, and Serhii Sydorenko
Springer International Publishing

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Список авторов
ИВ Баранова
Труды XVI международной ЭМ’2012 конференции. Под ред. Олега Воробьева 2012



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Н Волинець, І Васькіна
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Вплив транспортно-експлуатаційних показників доріг на навколишнє середовище
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