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With three units of laboratory equipment (jaw and roller crushers, as well as rotary ore divider) operating simultaneously, numerical modeling research was performed to examine the effect of dust emission area on air pollution in a laboratory crushing room. The modeling was performed in a three-dimensional setting using the COMSOL program. The room ventilation process was modelled based on a previously developed two-stage methodological approach: calculation of aerodynamic parameters in the incompressible fluid ap...

Chenopodium album L., is a plant from the Amaranthaceae family. In many traditional cuisines, the leafy plant is highly valued for the nutritional properties, especially the leaves. Being native to Europe and Central Asia, the plant has been used and cultivated for its nutritional and medicinal properties. Containing several bioactive compounds, makes Chenopodium album very beneficial to human health, including: betalains пїЅ pigments with antioxidant and anti-inflammatory properties; polyphenols пїЅ antioxidants ...

While the transition toward sustainable food systems pose a significant challenge, it also offers substantial economic opportunities. As consumer expectations evolve, the food market is undergoing a profound transformation. This shift presents new prospects for farmers, food processors, catering services, and other stakeholders across the agri-food sector. Pursuing the transition implementation can enable all the domestic food system operators along the agri-food chain to accomplish sustainability and to enrich th...

The present study aims to define a new cost indicator related to the extraction and handling of marble in a quarry located in the Apuan Alps, northern Italy. The analyzed cycle includes all operations required to extract a standard block volume, cutting with wire saws and chain saws, overturning the bench, block squaring, and transport to the yard, carried out using six machines, both for cutting and material handling. The adopted methodology considers costs related to fuel and energy consumption, maintenance, ope...

This paper aims to identify and analyse opportunities for improving financing mechanisms in the environmental sector by exploiting the opportunities provided by public-private partnerships. The need to create conditions and opportunities for strengthening ecological financing mechanisms in Bulgaria is identified as an essential element through which sustainable development goals can be achieved, while also aligning regional and national environmental policies with European environmental policies. There is a growin...

One of the directions towards a green energy transition is the spread of electric vehicles in the transportation sector. This necessitated the installation of electric charging stations, but as their number increases, so do the problems with their management and the increasing consumption of electricity. In this regard, there is a need to search for intelligent management solutions in the transition to alternative energy sources. This research is related to the development of a project to build a smart system for ...

Indoor skydiving wind tunnels are highly energy-intensive installations, yet their environmental performance remains largely unexamined. This study develops a mathematical model to evaluate how on-site photovoltaics, battery storage, and potential regenerative braking can reduce the electricity cost and carbon footprint of a horizontal wind tunnel designed by Storm Adventures. The model integrates empirically measured fan-motor demand, long-term solar irradiance data for Liepaja, Latvia, and Monte Carlo simulation...

This paper explores the technical, economic, and regulatory challenges and opportunities associated with integrating multiple solar Independent Power Producers (IPPs) equipped with Battery Energy Storage Systems (BESS) into South Sudan-s national electricity system. With an electricity mix currently dominated by expensive diesel generation, the analyses aim to support the country-s green energy transition by proposing new tariff structures and load dispatch strategies that ensure both system reliability and cost e...

The selection of foundation type for photovoltaic (PV) panels depends on several factors, including soil type, geographical location, site topography, groundwater level, and soil corrosion potential. Common foundation solutions for ground-mounted PV panels include ballasted foundations, ground screws, helical piles, and, most frequently, driven steel micropiles. The current study focuses on optimizing the design of foundations using steel micropiles by leveraging Cone Penetration Test (CPT) results to enable more ...

Cupola furnaces are still considered the most suitable furnace units for cast iron melting. Typical exhaust gas from a cupola furnace contains CO, SO2 and NOx. A relatively large amount of dust emissions are emitted from the cupola furnace. These are formed during melting in the cupola furnace. These emitted particles can contain CaO, FeO, Pb, MnO, MgO, SiO2 and Zn. Crushing and mechanical abrasion during charge preparation and charging generate particles, some of which are emitted immediately. Dust is also genera...

The energy transition at the current stage involves the decarbonization of the energy sector of the economy, namely, the shift away from fossil and non-renewable sources in favor of renewable ones. The relevance of this transition is driven by climatic, environmental, resource-based, and political factors. Experience has shown that modern global projects, such as the energy transition, cannot be implemented in a straightforward, top-down manner solely by state authorities and environmental agencies. The novelty of...

The flameproof enclosure type of protection is a safety method designed to prevent the ignition of an explosive atmosphere in hazardous environments. It involves enclosing components that may generate sparks, electrical arcs, or high temperatures within a robust, explosion-resistant housing. This enclosure is engineered to withstand the pressure generated by an internal explosion of a flammable gas mixture, ensuring that the explosion does not propagate to the surrounding atmosphere. This type of protection is par...

The hypersonic technologies for the means of launching spacecraft into suborbital and near-earth orbits, as well as for unmanned systems, combining both shock qualities and intelligence functions working in very not favorable conditions. The impact of the ultrasonic beam on inertial navigation devices of launching spacecraft , in particular, in a multi-phase, in hypersonic conditions was not investigated. Excess heat that is released during the operation of integrating gyroscopes heats the air outside the housing....

Passive acid mine drainage (AMD) treatment technologies are technically simplified systems that allow easy control, low capital and operational expenditures, and operating regime that is resilient to varying conditions. Classical technologies for the treatment of AMD with high metal content are based on the process of chemical neutralization. The most commonly used materials or reagents to induce passive neutralization are lime (slaked or quicklime), limestone, soda ash, magnesium hydroxide as well as industrial w...

Environmental pollution by technogenic chemical elements is a significant problem of modern industrial cities. To determine remediation measures it is necessary to have information on heavy metal pollution of all industrial and public facilities of cities, adjacent territories, and soils in parks and city lawns. Content of chemical elements in soil and their concentrations are in close genetic relationship with the lithosphere (bedrock), atmosphere, biosphere and hydrosphere and show constant exchange of matter an...

Complex energy systems, in the current period of transition to a climate-neutral society, comprise two fully functional subsystems, that of fossil fuel-based production and that of production from renewable energy sources. The functional coexistence of these subsystems is achieved due to the capture of the CO2 component from flue gases through the energy vector represented by green H2. This takes on both the role of energy accumulation and the role of transforming the CO2 component, captured during the combustion ...

In the context of sustainable development and the urgent need to reduce the environmental footprint of the construction industry, the reuse of recycled concrete waste in mortar formulations has emerged as a promising strategy. However, the incorporation of such waste materials typically leads to diminished mechanical performance, primarily due to the reduced chemical activity of the recycled aggregates. To address this drawback, nanoparticles have gained attention as functional additives capable of restoring or ev...

Sclerocarya birrea (marula) is a key multipurpose species in West African agroforestry and silvopastoral systems, essential for ecological stability, biodiversity conservation, and rural livelihoods. This study examines phenotypic variation in growth traits of S. birrea in northern Ferlo, Senegal, across three sites: Amaly, Tessekere, and Labgar. Field measurements focused on morphometric parameters influencing tree growth, including diameter at breast height, canopy diameter, and total height. Multiple regression...

The health of soil, groundwater, air and the entire environment of inhabited areas depends largely on the intensity of agriculture and its systems. In order to achieve the desired quantity, quality and economic profitability, it is necessary to apply large amounts of unnatural, often chemical substances in the production process in order to achieve the desired and profitable harvests. These are mainly industrial fertilizers, which, when used for a long time, can contaminate all components of the environment. Altho...

This article examines the impact of electric and electromagnetic fields on the accuracy of GNSS technology, particularly in environments with overhead high-voltage and power lines. Although this factor is often overlooked, it can significantly affect the quality of received signals and, consequently, the accuracy of measurements. Electromagnetic interference caused by the presence of power lines can lead to signal distortions, reduced positioning reliability, and, in some cases, complete signal loss. The study foc...

Potassium (K) is a crucial mineral nutrient that plays a significant role in various physiological and metabolic processes in plants. Disruptions in potassium supply can severely impair vegetative development, making efficient potassium fertilization strategies essential for maintaining plant health and productivity. As the most abundant inorganic cation in plant cells, potassium is vital for proper physiological functioning, primarily existing as a free ion (K?). It is indispensable for several physiological func...

Climate change represents one of the major environmental problems of our time (IPCC, 2021), significantly affecting plant water regimes and agricultural production. Increased temperatures, prolonged droughts, and unpredictable rainfall patterns lead to reduced soil water availability (Allen et al., 1998), increasing the urgency for efficient and precise irrigation management. As traditional methods based on soil moisture or empirical models become less effective under variable climatic conditions (Jones, 2004), th...

The transition to renewable energy is a high-priority agenda across Europe, particularly in Northern Europe. This shift is critical for achieving both environmental and economic sustainability. Northern Europe, with its high energy consumption and strong support for green policies, has the potential to lead in this transition. However, the region faces a unique set of social and ecological challenges that, if not carefully addressed, could undermine the sustainability of proposed solutions, harm natural ecosystems...

Cattle are considered one of the most significant contributors to greenhouse gas (GHG) emissions in livestock farming. The calculation method has been used until now. No data on how well the calculations correspond to the real situation, and how to influence this in practice. The need for real data is becoming increasingly important as farming intensification relates to GHGs and sustainability. The study aimed to investigate the concentrations of methane (CH4) and carbon dioxide (CO2) in cows- breath/burp (BB) in ...

The utilization of renewable materials has raised worldwide interest regarding biodegradable polymers, proving important scientific, ecological, and economic relevance. Biopolymers are versatile materials used in various applications due to their high strength, low weight, and minimal environmental impact. However, their characterization for understanding their properties requires extensive experimental measurement. In this context, conventional research is improved by the integration of artificial intelligence (A...

The recycling of old extractive dumps as filler and aggregate in civil and road construction is considered a conventional recycling method. In contrast, the use of extractive waste as an admixture in cement or as a precursor additive in clinker manufacturing represents an upcycling approach. Regulation (EU) 2024/1252 has shifted the paradigm of waste upcycling by highlighting the dissipative loss of critical raw materials contained not only in extractive waste but also in other waste types when recycled without aw...

Settlement risk is a critical concern in geotechnical engineering, especially for infrastructure on soft, variable soils. Traditional settlement estimation methods often rely on deterministic parameters, which can lead to overly conservative designs or, conversely, an underestimation of potential risks. While probabilistic approaches have been proposed to account for uncertainty, they often rely on simplified stratigraphic assumptions such as horizontal layering that limit their realism. This study addresses that ...

Within the framework of the iAMP-Hydro EU project, two dedicated work packages address the challenges of inflow and power forecasting for both run-of-river hydropower plants and large hydropower reservoirs. These tasks aim to improve short-term and medium-term operational planning by integrating advanced data-driven techniques into hydrological forecasting chains. Five initial validation sites, three located in Spain and two in Greece, were analyzed using a suite of statistical and machine learning techniques, inc...

A continuing concern in tourism and tourism studies is cultural change. Culture is frequently reshaped after the creation of tourist destinations. This does not, in fact, represent a loss of culture, taking into account the fact that hard, pragmatic work is being done in cultural production, which is, in fact, a response to the demands expressed by tourists, work that is constituted in solid economic and livelihood alternatives for communities. Cultural change has been a permanent concern in tourism. New cultural ...

Propellant powders represent a very important category of explosive substances that enter into the composition of ammunition, with military and civil purpose, in general in all systems where it is necessary to perform a progressive mechanical work. Propellant powders are widely spread in the military field and deflagration is the main form of explosive transformation. Propellant powders, also called colloidal powders, are homogeneous mixtures containing one or more energy-providing substances. Due to their imprope...

Nanoclay is increasingly being integrated into construction materials to enhance their mechanical properties. This advanced material improves the durability and strength of concrete, making structures more resilient to environmental stresses. Research shows that incorporating nanoclay into asphalt can improve its performance and longevity in road construction. The paper focuses on laboratory research on the effect of nanoclay adding on bitumen binder properties. The changes in penetration, softening point, and vis...

The mining industry is facing increasing pressure to enhance efficiency, reduce operational costs, and adapt to modern technological trends. One of the key challenges is the effective management of logistics, particularly the transportation of raw materials within mining operations. This paper addresses the application of simulation software as a strategic tool for solving logistics problems in the mining sector. Using event-based simulation, the research analyzes transport processes in the Hradova quarry in Kosic...

The present research contextualizes the hospitality industry within the broader framework of the European Green Deal and the United Nations Sustainable Development Goals (SDG 8 - Decent Work and Economic Growth; SDG 11 - Sustainable Cities and Communities). It emphasizes the importance of hospitality enterprises as maintainers of socio-ecological resilience in local communities, thereby ensuring stable employment, supporting regional development, and preserving the cultural landscape. In regions affected by high e...

In the last century human society has registered huge development in all human-related fields, fact that has been possible without doubt by designing technological applications with the usage of diverse natural resources, especially energy ones. Anyway, recorded progress, especially in technological fields, was feasible because of using fossil fuels for electric and thermal energy supply, which resulted besides positive impacts in undesired environmental pollution. Currently most debated effect by CO2 emissions is...

Public-private partnerships (PPPs) are increasingly promoted as collaborative tools for advancing circular economy (CE) strategies with climate-neutral outcomes. However, current research at the intersection of PPPs, circularity, and decarbonization remains fragmented, scattered across sectors, and lacking conceptual synthesis. This study proposes a systematic review of the literature to map how PPPs support circular practices and whether these initiatives report climate-related benefits. Using Scopus as the prima...

Pyrite tailings from operating industrial facilities, beyond their primary component, frequently contain valuable base metal minerals (e.g., Co, Ni, Cu) that are in constant demand and are critical for 'green energy' technologies. Despite the comparatively low concentration of Ni and Co in these tailings, their overall reserves are potentially significant. The objective of this study was to investigate the recovery of nickel, cobalt, and copper from leach sulfuric solutions derived from nickel-cobalt-bearing pyrit...

Peatlands are crucial carbon sinks, but their degradation through extraction and drainage results in substantial greenhouse gas emissions and ecosystem disruption. This study investigates groundwater level dynamics in a 16.4-hectare extracted peatland in Central Latvia to assess hydrological conditions relevant for restoration. Groundwater levels were monitored from May 2023 to May 2024 using TD-Diver loggers installed in six wells. The data reveal pronounced spatial and seasonal variability, with precipitation an...

This study investigates the influence of meteorological variables on evapotranspiration (ET) using a novel lysimeter design. ET was measured with three specially constructed lysimeters made from water containers equipped with geotextile bags filled with sand and colonized by grass cover (Red fescue and Perennial ryegrass). The use of geotextile lysimeters provides a simple and robust tool for ET quantification under outdoor conditions and also reflects the structural principle of evaporation beds (ET-beds), used f...

This study evaluates the radioecological condition of soils in the vicinity of major industrial enterprises in Georgia, focusing on contamination by radionuclides (K-40, Cs-137, Sr-90) and heavy metals. Three key industrial regions: Rustavi (metallurgical and chemical industries), Bolnisi (polymetallic mining), and Gardabani (energy production) were selected as research sites. Spectrometric analysis was performed using the Atomtex Plasma Atomic Emission Spectrometer (ICPE-9820) in compliance with GOST standards. T...

The rational use of natural resources is an urgent task not only in the oil and gas sector, but also in all sectors of production. This paper presents procedures for the preparation and purification of extracted oil-containing wastewater and stormwater from suspended solids, as well as various salts dissolved in water with the supply of coagulant solutions: iron sulfate or aluminum sulfate and soda ash to adjust the pH value. The conducted research and measures for the treatment of stormwater and carbonaceous wast...

Brewer-s spent yeast is a valuable by-product of the food industry that can be used for the extraction of bioactive compounds like beta-glucan. This paper aimed at establishing the optimal addition level of beta-glucan extracted from brewer spent yeast in pasta made of wheat flour with different protein content. For this purpose, dough texture, pasta nutritional composition, cooking behavior, pasta firmness and color were evaluated. The increase of beta-glucan level resulted in a proportional decrease of cooked pa...

The accumulation of glass waste has become a significant environmental concern worldwide, with millions of tons of glass discarded annually. Although glass is 100% recyclable, a substantial proportion still ends up in landfills due to inefficient collection systems, high processing costs, or limited market demand for recycled glass. In recent years, researchers and environmental policymakers have intensified efforts to identify alternative applications for this inert but non-biodegradable material, particularly in...

Sheep farms in the Banat Mountain area, to be economically efficient, need to use the plant resources of the pasture at optimal parameters, without degrading natural environmental factors through good consumption management practices. The new models of sustainable management of the use of plant resources for sheep feed are intended to contribute to reducing the impact of sheep exploitation on pastures on the natural environment through good practices for obtaining efficient meat and milk production from ?urcana sh...

In light of the gradual transition toward sustainable and green economy, the valorization of various agricultural residues has been drawing more attention. The leftover products from agricultural processing can be easily turned into a CO2-neutral biofuel. The subsequent deployment of nutrient-rich ash as fertilizer helps to keep a closed cycle of minerals and promote circular economy. This practice, however, comes with its drawbacks: excessive particulate matter (PM) emissions being among the most alarming. The pr...

Land improvements refer to measures and works carried out on agricultural or non-agricultural land to increase its value, sustainability and productivity. These improvements are intended to optimize land use, increase efficiency and support economic development. The purpose of this research was to describe the redesign of an irrigation canal, to present the necessary measurements, and to record the results. In this study, we have presented the steps necessary for measuring an irrigation canal and for drawing up lo...

The present article assesses the reliability of a water supply system that is fed by one of the large dams in Bulgaria and supplies water to three large settlements in the northeastern part of the country. The system consists of a water main with a length of about 25 km and three pumping stations. For each of the settlements that are supplied by this water supply system, the water has to be pumped by pumping stations to the pressure reservoirs. In recent years, the region has been experiencing significant drought,...

Industrial Control Systems (ICS) are foundational to critical national infrastructure, operating vital processes in sectors such as water treatment, power generation, oil and gas, and manufacturing. As these systems become increasingly integrated with information technology through the Industrial Internet of Things (IIoT), they face growing risks from cyber threats. As Bulgaria accelerates the integration of renewable energy infrastructure, particularly solar, wind, and gas-to-power systems, the cybersecurity of t...

Higher education must equip graduates with competencies that transcend disciplinary boundaries. This paper examines research literacy as a foundational pillar of sustainable higher education, with a focus on integrating Earth science and social science through interdisciplinary research. Drawing on bibliometric analysis of global, European, and Latvian publications, curriculum reviews, and survey data, the study identifies significant disparities in the way research methodology is taught and applied across institu...

This paper starts from an economic reality regarding the transportation situation and aims to introduce a scientific approach in a field that, in our country, has received more interest from a legislative perspective than a technical one. Transportation, in its broadest sense, has developed alongside human civilization and has incorporated throughout history all elements of its technical and scientific progress. However, in addition to the major benefits that have established transportation as a standalone and hig...

In light of the current challenges faced by rescuers during intervention operations, it is essential to place special emphasis on modernizing training infrastructure. Rescuers are often exposed to difficult and unpredictable conditions, whether operating in surface industries or underground environments. Adequate training and constant updates of training equipment are fundamental to ensuring both efficiency and safety in emergency interventions. The use of modern equipment and advanced technologies not only enhanc...