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In 2016 Pasztor and Schultz[1] proposed an analytical method for calculating a perforation designпїЅs effect on hydrocarbon-well inflow, using a new concept to analyze the effect of the shape of the perforation channelsпїЅ drainage area. The method compares well with standard industrial methods used to calculate the pressure drop caused by a given perforation design. In 2017 Toth and Pasztor[2] applied their model to investigate geothermal-well inflow, and achieved promising results. The modelпїЅs complexity makes...

In Europe, the knowledge and measures regarding self-protection in case of emergency is very poor in general. Within the population, young people aged 7 пїЅ 12 require a special approach, as their knowledge and behavior is different from adults. Their perception of accidents and disasters needs to be educated through an efficient teaching program. Therefore, a first step in developing such a tailored education program is to assess the natural hazards in European countries, with a special focus on the hazards that ...

In all countries, many practical observation and theoretical studies are devoted on the soil and water erosion. However, there are still significant shortcoming in theoretical and experimental parts due to the underestimation of its physical causes and excessive enthusiasm of "empirical formulas", which is not often taken into account the elementary physical conditions in erosion processes, so the responses are not very accurate. There is also other useful model which is called GIS; the model is very powerful to e...

Oil spills are the main cause of pollution with crude oil. Contamination with crude oil affects the environment (soil underground and surfaces, groundwater and water surface, air quality), plants, and health of animals and humans. Soil pollution with crude oil implies contamination with Polychlorinated Biphenyls, Polycyclic Aromatic Hydrocarbons, Monocyclic Aromatic Hydrocarbons and different heavy metals. The contaminated soil investigated in the framework of the present work was collected from a bioremediation p...

The ever-increasing demand for heating in different sectors, along with more preventative regulations of greenhouse emissions, has forced different countries to seek new alternatives to heat buildings such as district heating system (DHS). DHS is best suited to areas with a high building and population density in relatively cold climates. District heating, considered as the most efficient method for building space heating, has been dramatically developed over the past decades. This paper approaches the description...

All over the world, including Latvia, terrorism, warfare and other threats are on the increase, and risk prevention and minimization of the consequences of these events are associated with civil protection actualization and developing the competence necessary for that. This state of events is recognized through the replacement of the former Civil Protection Law with the Civil Protection and Disaster Management Law, proclaimed in 2016. The aim of the study was to evaluate the dynamics of the students` competence in...

The construction industry is one of the most material and energy-intensive manufacturing industries in the world, with about 50% of energy consumption and 60% of material resources. Obviously, the rational resource consumption, and as a consequence, the environmental future of humanity, to a large extent depends on the current state of this issue in the construction industry, and mainly emerging prospects for its modernization. For the construction, as the production sphere of national and global economies, findin...

According to the European Directive 2002/49/EC, EU members have to draw up a strategic noise map for all agglomerations with more than 250000 inhabitants and for all major airports, roads and railways. A study of environmental impact assessment on Highway A23 in the stretch between Abrantes пїЅ Guarda, conducted under the environmental noise, has as objective the characterization of the current situation, i.e. representation of senses in sound levels surrounding the infrastructure, based on modelling and acoustic ...

Russian governmental concern about serious problems in a field of health protection connected with environmental protection and safety of Russian Federation is shown based on the analysis of national strategic documents. In this regard, the establishing of scientific basis for environmental protection and environmental safety of population aimed at the correcting of the existing environmental standards and the indicators of permissible anthropogenic impact on environment is given by the federal document "Fundament...

In Romania, agricultural farms represent not only the place where agricultural production is made, as it happens in many European countries, but also the place where live and work almost half of the population of the country (45%); it is also meant to solve the social issues of rural inhabitants. The paper presents the analysis of agricultural farms of Romania as contributors to the development and consolidation of rural farms.The research methodology relies on the analysis, synthesis, representation and interpret...

One of the main environmental problems nowadays is related to contaminated soils. Soils can be contaminated with different compounds among which, the most widespread being the petroleum hydrocarbons (PH). The contamination of soil with petroleum hydrocarbons (PH) could take place during oil exploration. In this context, contaminated soil remediation is highly necessary. Over the years, different treatment methods for contaminated soil remediation have been applied. The present research illustrates the thermochemic...

Biological treatment is one of the most efficient process to remove biodegradable pollutants from wastewater. In practice, this process use air and activated sludge for well over a century. It is largely influenced by aeration equipment, which in addition to introducing oxygen into wastewater for oxidation of organic pollutants, they have to create hydrodynamic conditions to mix wastewater with microorganisms and with air, avoiding dead zones and microorganisms sedimentation. This stage of wastewater treatment is ...

In Romania, there are great possibilities for conversion and use of renewable energies, especially wind and solar energy. In order to maximize solar energy conversion, both as thermal energy and electrical energy, there are used sun tracking systems for solar thermal or photovoltaic panels, implying various types of drive: electric, pneumatic or hydrostatic. Based on the experience of more than 50 years in the field of hydraulic and pneumatic drives owned by the Institute INOE 2000-IHP, there have been designed tr...

The paper is a technical analysis for choosing the heat supply source of a technological heat consumer requiring steam at 2 parameters pairs: 32 bar & 400?C, respectively 6.4 bar & at least 200?C. The analysis of the whole combined heat and power plant (CHPP) processes and performances are performed for 4 CHPP designs, all of them with Gas Turbines (GT) and Heat Recovery Steam Generators (HRSG), through the numerical modeling of the processes in the CHPP components and by assembling them. The computing steps are: ...

The article considers the theoretical aspects and practical methodology of cost-effective eco-directed structural design. Nowadays the problem of ecological safety of the construction process is significant all over the world. Most efficient ways to solve the problem are dealt with keeping the environmental requirements at all phases of construction and best possible conservation of the whole ecosystem. All kinds of environmental harm, caused by construction process, generally could be converted to certain amount ...

First part of the paper presents the monitoring project of Turdas tunnel with the detailing of the monitoring equipment. Building of Turdas tunnel was realized for ensuring the maximum speed of 160km/h for passenger trains. In order to build the tunnel was provided a provisional support and a final support, due to difficult field conditions, obtained from the geotechnical studies, because of the presence of the swelling soil. To achieve safe construction of the tunnel were mounted specific monitoring equipment in ...

Heavy metal contamination of soils is a long-standing environmental problem in the world due to the increase of anthropogenic impact on landscapes. The proposed paper is the first step of an integrated ecological and geochemical investigation of soil cover of the Baikal region. Study object is the biggest island of the Lake Baikal named Olkhon, which is a part of the Baikal National Park, Russia. The study was performed by the key-site method. The method is based on the revealing an index plot, which characterizes...

Innovative aerobic granular sludge (AGS) technology has proved its ability to remove organic pollutants and nutrients from wastewater treatment at the same efficiency, but at a lower costs than conventional biological process. This technology has been successfully applied in sequencing batch reactor (SBR) configuration. An experimental model bioreactor was designed for adapting the AGS technology to continuous flow conditions. This paper presents numerical results for hydrodynamics and air dispersion into bioreact...

In recent years, the global economy has become increasingly interested in obtaining energy from renewable sources. This trend is mainly due to the necessity of reducing the negative environmental impact of conventional sources of energy. One of the leaders in making this change is the European Union. Energy policies and electrical systems of EU Member States are increasingly dependent on the development of renewable energy. This also translates to the energy policy of Poland as a member of the EU. In the coming ye...

The deposit Kokkyia is located in the exocontact zone of granodiorite intrusion, and zones of hydrothermal alteration, which enclose gold mineralization, are controlled by small intrusions of diorite and syenite of the Upper Devonian intrusive complex and are located in volcanic rocks of sour alkali and medium composition. Practically all the difference of rocks are affected by the processes of hydrothermal changes and are shown as the processes of propylitic nature: albitization, feldspathization, chloritization,...

Access to cheap sources of energy has been a foundation of economic development of the modern world. High rates of GDP growth affect the dynamic development of civilization and, inter alia, make technological progress possible due to the increase in global energy consumption. Energy costs and energy availability also have a significant impact on the economic competitiveness of particular countries and regions of the world. Dynamic world economic development, population growth and the widespread use of energy in ev...

The ground serves as an ideal heat source for monovalent ground-coupled heat pump (GCHP) systems. This paper presents a working methodology and develops an analytical model for evaluation of the ground thermal conductivity and the borehole thermal resistance using a thermal response test (TRT). Additionally, this paper uses the Earth Energy Designer (EED) simulation program developed on the basis of the line-source model to calculate the fluid temperature for a case study of the ground heat exchanger according to ...

This work presents the results of the study of the different content (0-7 wt.% in increment of 1 wt%) effect of bentonite microparticles on the mechanical and barrier properties of gelatin/potato starch/glycerol (90/10/30 wt.%) edible biocomposite films. The biocomposite films are prepared by casting method from film-forming water solution and characterized by thickness, moisture content, transparency, mechanical test at puncturing, water barrier properties and water solubility. Increasing the concentration of ben...

With clastic sedimentary rocks associated deposits of ore, oil-and-gas, coal and non-metallic minerals. They are located in a variety of different age strata structural-tectonic stages. Sedimentary rocks composing these fields are often framework rocks or minerals themselves are economic minerals. Depending on the age and affinity to specific structural and tectonic tier breeds are in various stages of the penecontemporaneous transformation. By the degree of transformation of organic matter in the clastic rocks ca...