Browse

Most methods of mining waste water treatment require significant costs for the construction and operation of tailings. Their area is calculated from the sedimentation time of impurities and suspended particles. The paper shows that an effective way of mining waste water treatment is flocculation of impurities and suspended particles and the subsequent flotation of the resulting flocs. Based on the results obtained, the Mining Institute KSC RAS has developed a technology for mining waste water treatment, including ...

The increase in the price for non-renewable energy resources has led to the finding of cheap alternative fuel solutions that can meet the growing demand for energy. The objective for the researchers is to use renewable energy as an alternative energy source to produce green energy. Over time, researchers have developed several types of shapes for the wind turbine: small, which have a generation capacity of 50-60 KW of power; On average, they have a capacity between 50-1500 KW and large, capable with a capacity of ...

The environmental problems of developing solid mineral deposits are largely associated with the need to store waste from mineral mining and processing. Such wastes occupy tens of thousands of hectares and are a source of pollution of atmospheric air, soil, surface and groundwater as a result of wind and water erosion. Large areas of stored waste determine the reasonability of using remote observation methods for assessing their conditions in order to make informed decisions aimed at improving the ecological state ...

In this paper, we propose a mathematical model and an appropriate algorithm that allows one-time measurement of the frequency response and phase response of the MET sensor under normal conditions to construct a complex transfer function of the MET at any other temperatures from the allowable range of -35 + 55 °C with the experimental accuracy not worse than a few percent. This model and the algorithm for setting up and selecting thermocompression circuits of electronic amplification and filtration circuits introdu...

Floods are exceptional processes, observed in daily life as part of the hydrological cycle or as unusual extreme events. As a result of significant precipitation, snowmelt or/and anthropogenic pressures and technogenic disasters river flow rapidly increase causing an overflow on rivers floodplain with possible damages on the crop, households, economy, infrastructure, social life, etc. Observed consequences depend on the local conditions. They can be negative or insignificant in case of comparatively minor floods, ...

The article presents a detailed study of the close relationship between the content of total dissolved iron (Fetotal), Fe2+, Fe3+ on the one hand and physical and chemical parameters (Eh, pH, salinity (S), water temperature, electrical conductivity (Cond), the content of molecular oxygen and its saturation percentage in the section "Don River - Sea of Azov" on the other under various weather conditions. Correlation coefficients, as a quantitative measure of the tightness of the connection, varied over a wide range...

In our scientific approach we have sought for showing who are the main actors of the financial markets, i.e., those persons who decide, directly or indirectly, on all the events which may occur on the said markets but, above all, on those who require a sustainable financing of long term impact on mankind. Such persons hold positions on various levels of the financial entities but all of them have a decisive role in the making of most of the decisions which have as a result various actions on those markets, either ...

This paper describes an algorithm that proposes compositions of structures that are in contact with the cooled environment based on the user's priorities. Specifically, the algorithm evaluates the construction of floors, flat, and pitched roofs. The algorithm compiles these structures based on individual technical criteria and their set priorities in combination with the price of materials. Multi-criteria methods such as the Saaty method and the weighted sum method are using to determine the importance of individu...

The constant need for techniques that contribute to the environmental preservation has led researchers worldwide to intensify their studies regarding different routes that enable the environmental protection. Azo - dyes can be found in aquatic matrices and conventional procedures applied in effluent treatment plants showed not so good results in respect to degrading this type of dyes that are usually persistent and refractory. Also, textile dyes release important amounts of toxic and resistant color effluents that...

A major risk factor for freshwater coastal aquifers is represented by seawater intrusion, consisting of the movement of marine saltwater into these aquifers. This occurs due to sea level changes, tidal fluctuations, changes in evaporation and recharge rates, fractures in coastal rock formations, or excessive freshwater pumping. The negative effects of this salinization phenomenon are a reduction in the available freshwater storage volume, the contamination, and the abandonment of production wells. In Romania, such...

The main purpose of this paper is to provide new geological information and interpretation of the well data from the Istria Basin, Western Black Sea. Therefore, we present a reconsideration of the microfaunas (mainly foraminifers) and calcareous nannofossils described from several wells drilled on the Lebada East structure belonging to the Istria Basin, by using core reports. Thus, we have been able to compile integrated information regarding the lithology and biostratigraphy of the wells. We have focused on the s...

The exodus of young people from rural areas in Romania, corroborated with the decrease of the population at national level is a major problem of the country. The Common Agricultural Policy integrates this issue, finding several forms of support both in Pillar I, on direct payments, and in Pillar II, on rural development. This paper proposes the analysis of support for young farmers in the second pillar. Thus, the measures related to the support of young farmers through the National Rural Development Program will b...

Rapid development of residential housing in Kazakhstan entails an increase in the consumption of thermal energy and, accordingly, carbon dioxide emissions into the atmosphere. According to the Department of Statistics, only in 2019, 41,415 individual and 1,746 multi-apartment residential buildings became operational in the country of the total living area of 13,133.8 thousand square meters. Providing that all built houses comply with energy efficiency requirements of Kazakhstan, the introduction of new housing has...

The territory of Bulgaria represents a typical example of high seismic risk area in the eastern part of the Balkan Peninsula. The spatial distribution of seismicity in Bulgaria is uneven, which gives reason to group earthquakes into geographically defined zones - seismogenic zones. In the present study the Sofia seismogenic zone will be examined. Sofia seismogenic zone is located in southwestern Bulgaria - the area with pronounces tectonic activity and proved crustal movement. The capital of Bulgaria - the city of...

The business is under constant pressure to improve their environmental performance, in particular, in response to scarcity of natural resources and the higher societal expectations for social and environmental responsibility. Therefore environmental management has become crucial to overall business management. In the new series of ISO standards, the ?risk-based thinking" underlies the development and implementation of the environmental management system. The risk-based approach allows the integration of risk manag...

This article shows the geochemical studies of associated produced reservoir water of the Bobrikovian horizon by the area of research at one of the deposits of the Republic of Tatarstan. The horizon is characterized by terrigenous rocks, which in turn is underlain by a massive carbonate reservoir. Quite a lot of producing wells work for it, and also, in view of reserves development, a system for maintaining reservoir pressure has been introduced. Based on the composition of the produced water, maps of the distribut...

The paper aims to address the importance of inspection and maintenance of electrical equipment used in liquefied petroleum gas car filling stations. In order to maintain in operation the electrical equipment in environments with potentially explosive atmospheres under harsh conditions, the personnel involved in inspection and maintenance activities must be trained in such a way as to know the operation of these electrical equipment with different types of protection and how to perform their maintenance. Inspection...

The Geological Survey of Norway, in 2019, collected helicopter borne geophysical data in parts of Loppa and Kv?nangen municipalities, in Northern Norway. The objective of the airborne survey was to obtain a dense high-resolution magnetic, electromagnetic and radiometric data set over the surveyed area. These data are required for the enhancement of the general understanding of the regional geology of the area. Adjoining areas covered by previous airborne surveys in 2014 were merged with the current data. The studi...

Effective stimulation of the activities of national enterprises related to environmental protection, reduction of the negative industrial impact on the environment, an increase in innovation and investment attractiveness, environmental image and improvement of environmental situation in Ukraine is possible if the methodology for assessing the overall level of enterprise?s environmental security is developed and tested in practice. The relevance of solving this scientific problem is that it is important to take int...

At present, the issue of waste management is becoming more acute because of increased quantity and diversity of waste, as well as because of its more and more pronounced negative impact on the environment. The current paper showcases a study carried out at a compliant household waste landfill where the following were monitored: quality of air containing wind driven suspensions, gases coming from the warehouse surface or from trapping and burning methane resulted from landfill?s cells as well as odorants released i...

Assessment of available geophysical and geological data for the Bulgarian Black sea shelf is presented in order to give a conception about the simplicity and functionality of the methodology of how the records are stored. Data on these disciplines provide valuable information about the history and the dynamic of the shelf and can be in use for numerous investigations. Geological, morphological, geophysical, geochronological findings show the changes in the shape and movements of this region from the aquatory, its ...

The study of regional characteristics of the bottom sediments physicochemical structure in semi-closed water areas (using the example of the Balaklava Bay) is especially relevant due to the fact that the recreational potential development rate of this region has significantly increased. During the studies, 3 columns (two in northern part of the bay and one in southern) of bottom sediments were taken and the activity of 137Cs, 210Pb, and 226Ra in them was determined. Column samples were taken using an acrylic soil ...

By applied to spatial planning tasks, a multi-level spatial sustainability assessment system should be taken into account. The paper considers the district spatial level which includes the coastal district municipalities within their administrative borders. All coastal district municipalities have features of their socio-economic statement and environmental status, due to various physical, geographical and socio-economic aspects, which determines the current state of stability of the spatial system. The following ...

In order to determine the effects of strong earthquakes for a given settlement, it is necessary to solve several tasks in a few stages. The first task is identification of the building stock for the surveyed area. The assessment of the effects of strong earthquakes is based on procedures for integration of seismic hazard and seismic vulnerability of the bearing structures of the building stock. The building stock is divided into three main groups, taking into account the specificity of the building and the availab...

Active development of unmanned aerial vehicles has led to their widespread use for various purposes, and magnetic prospecting is no exception. UAVs in various modifications are used in aeromagnetic surveys intended for magnetic mapping of the subsurface. This allows to solve the problems of not only aeromagnetic prospecting (identification of ore deposits, petroleum prospecting, etc.), but also of geological engineering and archeology. The advantage of using UAV lies in the cheapness and safety of the survey. Magn...

Theoretical studies of how resource-based economies develop change along with changes in approaches to studying sustainable development. There are opposite points of view on resource-based economies. On the one hand, abundant natural resources help countries grow rapidly and efficiently. On the other hand, the 1970s saw the emergence of the resource curse concept in which natural resources are seen as an obstacle to successful economic development. This paradox is explained in various ways, including macroeconomic...

The drilling muds parameters are playing a major role in drilling technology and particularly in oil and gas drilling technology. At present those parameters are measured manually at long and irregular time intervals. In Satpajev university a general method of the existing manual measurements automatization has been worked. A number of patents on appliances for automatic continuous measuring the drilling mud funnel viscosity, density, jell stress and other parameters was obtained. Engineering development on creati...

In Kazakhstan the marine sections of the boundary deposits of the Bashkirian and Moscovian Stages are located in the Zhungar-Balkhash region within the carbonate-terrigenous, carbonate and, less commonly, carbonate-type rock units. The most well-known and studied sections are situated in the North-Eastern Balkhash Lake region (the Tastykuduk formation) where in the boundary deposits of the Kungesai and the Tastykuduk sections (the Sayak synclinorium) there are faunas of ammonoids, foraminifers, corals, bryozoans, ...

The discovered industrial and semi-industrial hydrocarbon reservoirs, seeps and offshore gas hydrate fields in the Bulgarian Exclusive Economic Zone (BEEZ) are evidence of the generation and migration of oil and gas in the Western Black Sea basin. Marine gas hydrates from the deep water palaeodelta of Danube are seismically studied recently, but the issues about their origin and thermal maturity of sediments still need significant clarification. Therefore, the aim of the paper is to study the basin subsidence and ...

In the Northeastern part of Kosovo is the Trepca Mine which produces very beautiful crystals. These crystals with mineralogical composition are in favor of being visited by visitors and tourists from all over the globe. Their value is great and it is important to visit. Near the Trepca mine is the Museum of Crystals and Minerals of Kosovo. "Trepca", where crystals and minerals extracted from the underground of Kosovo are stored, protected and exhibited, not only in the Municipality of Mitrovica, which have a high ...

The Barents Euro-Arctic Council (BEAC) is the forum for inter-governmental co-operation on issues concerning the Barents region. BEAC unites 13 regions of 4 member countries ? Finland, Norway, Russia, and Sweden. The Working Group on Environment (WGE) deals with major environmental challenges. Back in 2003, BEAC issued the Barents Environmental Hot Spots List, which included 42 major polluters located in the Russian part of the Barents region [1]. WGE worked out the ?Criteria and Procedure? approach aimed at promo...

The study begins with a synthetic presentation of geological and geophysical data at this time. The geological data come from the detailed geological mapping superimposed over the previously elaborated geological maps (at scales 1: 200000 and 1: 50000). The data on the deep structure come from the magnetotelluric and seismic sections interpreted. Of course, the documentation obtained from previous referenced publications and the specialized sites brought an extra knowledge. We performed a multiparametric correlati...

Between geoparks and protected areas occur some differences. Geoparks represent a complementary rather than competitive concept to nature protection. The theory of geoparks considers not only the protection of geological heritage with support for their understanding, education but also promote sustainable socio-economic and cultural development by geotourism. In this context, we referred to the feasible prospects of geoparks in protected areas on the example of Silica Plateau, one of the areas of the proposed Sili...

In the present work the dependence of macro- and microelements content in plants on the level of soil contamination with heavy metals is estimated. The influence of different concentrations of lead (Pb), zinc (Zn) and cadmium (Cd) in Sod-podzolic soil and Chernozem on the elemental composition of agricultural crops (wheat, barley and alfalfa) depending on their biological characteristics has been studied. It has been shown that as a result of excess metals intake into plant organisms there are violations of the me...

The influence of a number of factors on the condition of small rivers in the Kaliningrad region is considered. It has been shown that deforestation, floodplain cultivation and development, changes in microclimatic conditions, affecting even 20% of the catchment area of the small rivers, significantly specify their ecological state. Since bottom sediments are an indicator of the state of watercourses, their quality also depend not only on factors directly determining composition, but also on factors determining the...

The article summarizes the total number of technogenic mineral formations in Kazakhstan, which occupies the 9th place in the world over the territory, which has huge mineral reserves. The presented material gives the properties of the waste, its particle size distribution, storage conditions, as well as the approximate volume of secondary raw materials. The integrated use of mineral resources is a very difficult task, including technical, economic and environmental issues, the solution of which requires the joint ...

Monitoring of aquatic objects ecological state must include forehanded recognition of critical situations. Therefore, the forecasting widely uses possibilities of computer simulation. Of course, the most complicated and relevant simulation model of an aquatic ecosystem is giant simplification of its real life. Nevertheless, history of mathematical ecology proves that even such simple simulations of population dynamics, as predator-prey models and ones of competition for a resource between two or three species can ...

The Brown Coal Research Institute j. s. c. is realising the long term research and survey in the field of restoration problems. The target of these works changed during development of localities. The main problems of present days are reclamation during frequent hot and dry periods, the extreme alkaline soil reaction of any localities soils, occurrence of phytotoxic and sterile areas and methodology of areas retained to natural succession founding. The article is devoted to the methodology of research and to the de...

Cogeneration equipment is generally classified according to the power source for the production of energy and the size of the electrical power. Low power cogeneration refers to those with powers up to 1 MWe, and those of medium power reach 25 ? 40 MWe. The overall efficiency of primary fuel use, under favorable conditions, can exceed 90%. Currently there are different solutions for low / medium power cogeneration, whose technologies are well developed. For a properly designed low power cogeneration the investment ...

The paper provides comparative characteristics geodynamic situations and of related intrusive series. Discussed are cases of alternation of such granitoids in time, their connection in space and relation to collisional processes. I-granites form extended gabbro-diorite-granodiorite-sodium and potassium-sodium granite series with gradual increase of the role of silica and potassium in the final products. Differences in the petrochemical composition of pre- and late collision of I-granites are conditioned by the sub...

The concept of community resilience in rural areas comprises the idea of sustainability, ability to adapt or resist new conditions and external influences and to turn possible risks into opportunities. In order to reduce degradation of rural areas and to preserve rural environment and natural resources, rural communities need to be active in setting priorities, decision making and purposeful realization of initiatives. The LEADER program is an important instrument supporting local initiatives to strengthen communi...

Cyanobacteria are a diverse group of photosynthetic bacteria found in a wide variety of habitats where they play crucial roles. They are one of the most morphologically diverse groups. The evolutionary relationships and the classification are poorly understood. The whole genome sequencing added a new dimension to our understanding of genomes of cyanobacteria and the genome-based phylogeny came into existence. The aim of this study was to conduct a genomic comparison of phylogenetically closely related filamentous ...

A technology of pre-design comparative assessment of hazardous industrial facilities alternative options is described in this paper. The technology was designed by the St. Petersburg environmental and design company "Eco-Express-Service" LLC. Options? comparison is carried out in two stages using a score/ranking multi-criteria assessment: at first, a determination and comparison of environmental safety criteria values, and then ? a summary assessment of all set of criteria. 4 competitive methods are used for obtai...

Topography plays an unraveled role in many biophysical processes and phenomena. The main problem, however, is that measurement, representation, and characterization of such a vast and continuous feature are very challenging. The accuracy of Digital Elevation Models (DEMs) has a direct influence on the results of the further landform analysis. In this paper, we use existing approaches of landform analysis with the use of global DEMs in the large-scale regional study. A detailed comparison was made between landforms...

The goal of the paper is to present the use of multicriterial decision methods to assure the transparency of public acquisitions in the context of regional economic growth. Based on multiple criteria algorithms and using adequate methods to determine the importance of each criterion, a computer program was created to assist the decision maker. The software was created by the department of Mathematics and Computer Science of ?Aurel Vlaicu? University of Arad and implements the procedure for public tenders. The appl...

The evaluation of explosion-proof electrical equipment for certification is particularly important given the risk of explosion and must be minimized. This in order to ensure the safety of life, health of workers, to prevent damage to goods and the environment when they meet the essential security requirements at European level. Directive 2014/34 / EU states that equipment used in explosive atmospheres must be designed to operate without endangering the environment for which it is intended. This paper deals with th...

Most of the equipment operating in potentially explosive atmospheres in oil and gas industry is represented by electric motors, which in most situations act on various other elements (e.g. pumps, valves, fans etc.). Evaluation of explosion-proof protected electrical equipment in scope of certification is extremely important considering the risk of explosion that has to be minimized in order to ensure life safety and health of workers and to prevent damaging of property and the environment, as well as free movement...

The article considers the dynamics of flammable substances concentrations in ventilated rooms. Ventilated rooms are used for equipment and installations where the risk of explosion is caused by the presence of flammable substances such as gases, vapours and mists. The first part presents the explosion risk associated with presence of flammable substances and the classification of atmospheres in which explosion risk is noticeable. Thus, for areas where the explosive atmosphere can be delimited inside a compartment ...

The onshore Thermaikos basin is the northwestern extension of the offshore Thermaikos basin, located at the area west of Thessaloniki, in northern Greece. It consists a sedimentary basin, where thick sediments dating from Paleogene to Quaternary are overlaying the older ophiolite and deep-sea Mesozoic formations of Axios geotectonic zone. Thermaikos basin, both offshore and onshore, has been considered as a hydrocarbon promising area, with a proven gas field in offshore Epanomi area in Thessaloniki gulf, hence a n...

Currently, the growth of agricultural production in Russia is closely related to the pace of scientific and technological progress in the agro-industrial complex, which is largely determined by its level of energy supply. The most significant consumers of energy in the agro-industrial complex are livestock, poultry complexes and enterprises associated with food storage. In animal husbandry, energy costs are the second largest after feed, with more than 30% of the energy consumed in creating a production microclima...