Browse

The product of biogas plants, in addition to em erging biogas as well as digestate, which is usually used for fertilization. Due to the relatively strict legislative requirements, which must meet the digestate to be used fo r fertilization, it is necessary to design and evaluate other potential alte rnative use of digestate. This paper presents the initial laboratory experiments of pyrolysis and gasifi cation of dried digestates, focusing on the composition of gaseous products of these pr ocesses, utilization of s...

Tourism is the e-specific industry in view of how to use ICT. Tourism enterprises used ICT to communicate buying and selling serv ices and products in this sector. Popularization of the social networks create s from them a modern tool for marketing purposes. Contribution analyses and offers an overview of tools and platforms to promote the appropriate destination. Describes the life cycle of the experimental site intended to promote the destination Pieniny created within the social network facebook.

Eroded soils improvement issues are a prior ity, but it is better to solve such problems using easily recoverable natural compounds as the residual marine biomass. This possibility is insufficiently studied but can solve multiple envir onment problems. The study of marine organisms’ communities that are broth to the Romanian Black Sea shore by the waves, is aimed at qualitative an d quantitative analysis of macroalgal and invertebrate communities, seasonal dynamics of these communities, analysis of macrobiologic...

In this paper, the utilization of coal fly as h and bottle glass waste in building industry is described. In the first step of our experiment we made concrete samples with partial replacement of cement by activated coal fl y ash from Slovakian power plant Novaky. The second part of our study is focused on utilization of selected fractions of bottle glass waste in concrete production. From all mixtures, samples with dimension 160x40x40 mm were made in our case study. After 28 and 90 days of hardening, samples were ...

Magnetotelluric (MT) and Manetometry data physically provide the signatures of the apparent resistivities for various geological formations or simply various rocks and materials. In this study th e interpretation guide us to useful information about Damavand volcano’s geological characterizations. Recognition of the fault paths, zones and the trend of them in the region also would lead us to a 3D image of the location of the magma chamber which in turn would be the direct result of the current project. The resul...

The objectives of this study were to present and compare methods for change detection of forest areas in low-resolution satellite imagery, using object based image analysis and standard image analysis techniques (pixel ba sed). Considering that huge area in Serbia is covered with forest, this study is of great importance for detecting and tracking changes over time. The data used in this st udy were optical remote sensing satellite images Landsat TM (22-08-1986) and Landsat ETM+ (23-06-2002). These images were pro...

Coal is one of the main energy sources in condition of Slovak republic. During process of gasification there is rising coal gas that presents natural part of every coal bush. Methane presents its significant element. One of the technologies for ga s obtaining in situ is also underground coal gasification – UCG. Technologies for gas obtaining from the coal layer are considered as “clean coal technologies.” Despite of their using there can be contamination of every element of the living environment. By not per...

The article deals with the development of sanitation processing model as well as the necessity of model simulation in a soluti on of prevention and remediation of unusual flood events. There are the possibilities for an involvement of water flow owners, community land trusts and i ndividual towns and municipalities in the sanitation process and prevention of unusual flood events. This pa ys main attention to the effective human resource management for organization of sanitation and working teams. It shows on a dem...

The advantage of global navigation satellite systems (GNSS) over other terrestrial technologies is that it is not affected by uncertainties in the ground layers of the atmosphere. At present, manufacturers characterize the accuracy of vectors measured by the static method of GNSS technology using values 5 mm + 1 mm. But also exist different methods of choice the cofactors of measured quantities by GNSS. The paper presents experimental measurement of the 3D geodetic network using the technology of the GNSS, process...

Produced water flooding allows to simplify conventional schemes of external water supply and water injection into oil reservoi r. As a result, the time of development of water flooding decreases, necessary volumes of injection water are rapidly attained and conditions for high rates of oil production are created. The Kholmov area water flood analysis demonstrated considerable lags in highly productive shale and low productive reservoir production. According to the analysis the existing technological scheme for res...

The using of low-emission - renewable sour ce of energy (wind, solar and photovoltaic energy, geothermal energy and energy from biomass and biofuels) undoubtedly contributes to the retardation of climate changes. The energy is the essential part for the world function. Today is the achievement of reasonable energy consumption one of the fundamental roles. It has 80% of all greenhouse gas emissions in the world, which are the main cause of the climate change and stronger air pollution. Therefore it is needed to red...

It is shown by experience that direct double integration of strong motion data with the aim of generating earthquake displacement records usually leads to unrealistic values of residual displacements even for earthquake s with moderate magnitudes or at far epicentral distances. The appearance of veloc ity and displacement records suggests that changes in the zero level of acceleration are responsible for these drifts. Therefore, in order to calculate real displacements, baseline correction seems consequential. Thi...

The theme that will be considered in this paper derives from the cultural debates in many areas of the South Italy because it is necessary and urgent to establish new protected areas. The context of the analysis is expanded compared to the issues of the parks’ planning, structured on a prelimin ary economic analysis about the nature’s protection that without the financial support and activism of the involved people risk to transform parks into natural containers not in line with the current standards and with ...

Nowadays some novelties on computer technology and new softwares have exposed “modern cartography” term. Generally all existing data are recorded digital areas. At the study, raster /vector data transformations, obtaining of digital data, and evaluating and analyzing of new methods have been discussed and exemplified in detail. At the result, outcomes and suggestions of the applications will be illustrated.

Recovery of gold and other valuable metals from electronic scrap involves a complex metallurgical flow sheet and requires state- of-the-art recovery technologies that are available in large-scal e, integrated smelter-refinery opera tions. At the end of their use, electronic and other el ectrical product scrap offer an important recycling potential for the secondary supply of gold and silver into the market. With gold concentrations reaching 200-250 g/t for computer circuit boards, this scrap is an ‘urban mine’...

The enhanced oxidation of su lphide minerals by mini ng activities is a worldwide problem of significant environmental interest because of leading to the generation of Acid Mine Drainage (AMD). These waters e xhibit very different chemical and physical properties depending on their origin and the geochemical nature of the site of exploitation. Low pH, high concentration of sulphates and various heavy metals cause their deleterious effect on the environmen t. Treatment methods to address AMD are focused on neutrali...

Recycling is the method used to reduce the environmental impact of large volumes of materials, the sparing use of resources is another relevant factor here. The waste materials which occur in the foundry and st eel industry alongside the target products most be used elsewhere or returned to the foundry and steelmaking processes. The result will be that the need to dispose of material s will be greatly reduced , so alleviating the demand for landfill capacity. In addition, raw material depo sits will be conserved a...

The goal of a recycled paper or board manufacturer is to make a product that meets customersО„ specification and requirements. At the present utilization rate, using recycled fibres in commodity grades such as newsprint and packaging paper and board has not caused noticeable deterioration in product quality and performance. The expected increase in recovery rates of used pa per products will require a considerable consumption increase of recycled fibres in higher quality grades such as office paper and magazine pa...

The paper presents the main factories which determine the environment pollution at hot dip galvanization process of steel sheet and developing of recycling technologies of zinc by-product, with a view to recovering metal zinc or different sub- products, and returning them in the production cycle. By th e recycling of zinc by- products the prime material consumption is reduced and enviro nmental protection is improved. Industrial wastes generated in the hot dip galvanization pr ocess of steel sheet are: zinc ash, d...

In this paper we describe the analysis of costs associated with disposal of hazardous and common waste, in the construction company. Furthermore, we show how to implement Six Sigma methodology to reduce costs of waste disposal. On the specific example from practice there is shown the effectiveness of this approach in the management of waste in the practical conditions of a construction company.

Artova ophiolite complex is located along the North western and east margin in Yozgat (Turkey). The Mn-deposits in the Derbent an d Eymir areas are part of this ophiolite complex. These deposits, both banded and lenticular forms, are hosted by radiolarite and are generally overlying volcanics. Braunite, jacopsite, psilomelane and goethite are main constituents of the manganese ores in Eymir (Sorgun-Yo zgat) and manyetite, manganite, pyrolusite and goethite are main constituents of the manganese ores in Derbent (Ma...

A similar succession of Foliation Inflection/In tersection Axis trends preserved within porphyroblasts (FIAs) is present in two areas separated by 200 km along the Rocky Mountains. PreCambrian rock s in Central Colorado and Northern New Mexico were affected by deformation and metamorphism from approximately 1506 to 1370 Ma. A succession of five FIAs trending W-E, SSW-NNE, NNW-SSE, NW-SE and WSW-ENE has been distinguished in Central Colora do that have been dated at 1506В±15 Ma, 1467В±23 Ma, 1425В±18 Ma, not dated ...

The present paper is devoted to the results of long-term field observations of oil pollution transformation in sma ll watercourses of the Lower Don River basin (Russia), on the Atlantic coast of France and in the Strait of Kerch polluted by spilled oil. The investigations included visual assessment and sampling of oil slicks, water and sediment cores. The analysis of samples were carried out with the use of th in layer and column chromatography, optical and gravimetri c methods making possible to determine separat...

In conductive heat transfer mechanism daily (diurnal) temperature variations almost damp in a layer as deep as 1 m, and annual variation do it as deep as 18-21 m. In case of coincidence of periodic heating with flui d mass transfer (downward percolation of surface water from rivers), thickness of the layer with periodic temperature fluctuations increases significantly. This discovery with author`s priority registered August,19, 1964, was made by N.M. Frolov. We consider the research on temperature waves created in...

The aim of this paper consists in highlighting the feasible technical solution in a real situation, namely to achieve the consolid ation of the road accessing the monitoring block from Obrejii-of-CДѓpГўlna dam. As a consequence of the landslides occurred on the left flank, between the intersection with national road DN 67C and Podu Vacii point, at about 50 - 60 m downstream the dam, it was proposed the narrowing of the access road platform, to the surveillan ce and control block of the dam, on 20 - 30 m length. Ac...

Ever increasing industrialization has b een an important factor causing many environmental problems. Man made inputs asso ciated with industrial practices; mineral exploration, industrial processes and solid wa ste management contribute to heavy metal contamination of natural ecosystem. Nickel is one of the heavy metals that are present in industrial water from traces to very high quantity. Extraction of Ni 2+ from the effluents using flyash depends on various parameters such as pH, quantity of fly ash and sorptio...

Conducted research of processes of dry an d wet mechanoactivation of wolframite concentrate and structural modifications were determined. With a purpose of maximum transference of tungsten from obtained after-sintering mixtures into solution, investigation wa s conducted, conditions of hydro desalination were determined and technological regime of the process was developed.

Self-ignition processes are a serious probl em in brown coal mining and depositing. Infusions and following fires are frequent events in open pit brown coal mines with seams influenced with previous underg round mining, homogenisation and other deposits, and on stock-piles of power and heat stations and industrial plants combusting coals as well. The objectives of the project from the ALFA programme No. TA01020351 are presented in this article. The project solves a research, development, and verification of a comp...

This article is a summary of previous rese arch results focused on solution of rainwater use in urban areas. The research was focuse d on monitoring of quality and also quantity of caught rainwater. Based on rainwater qua lity monitoring the results were evaluated and compared with valid legi slation and some improvement s of rainwater to quality corresponding to drinking water were proposed. By the water treatment the aggression of rainwater was first solved, which was ev aluated on the basis of test according to...

Road structures construction and maintenance involves the use of large amounts of materials, including natural aggregates that occupies the largest share. On one hand the quality of natural aggregates, and other road ma terials, is decisive for the success of the technologies used in the road construction sector and on the other hand, the diversity, and number of the possibilities of purchasing and the number of producing units are more varied for natural a ggregates with possibilities to significantly influence t...

This paper represents results of measuring of sedimentary dust at two locations. One location is at SM where installed is old fa shioned technology for limestone processing. The other location is „Kota“ near Vareš, where installed is contemporary technology for limestone and spilite processing with application of BAT (the best available technique), and is a property of company „BBM Vareš“ d.o.o. from Vareš. Measurements confirmed that during limestone processing wh ere old fashioned technology is instal...

The article deals with brownfields which orig inated as a secondary result of different character of restructuring land used in the past in any EU country and time often accompanied by extreme burden on the individual components of the environment. Removal of the resulting environmental burden would contribute not only to improvement of the environment but also to further socio-economic development of the region in which the brownfield is located including primary, secondary and tertiary sectors of business enviro...

The open pit Veliki Krivelj is a copper mine which operates within RTB Bor Group in Serbia. In 1998 a combined haulage system involving the initial dump truck haulage, crusher, belt conveyor and a boom spreader for waste disposal was designed and installed in order to reduce the costs on overburden removal. The designed productivity of the system is 4 700 t/h and it will be fully operational in the next few weeks. Up to date it has been capable of achieving maximal 50% of this productivity because only one of two ...

This paper gives some information about risk management and its significance for financing project in mining industry. The projects in mini ng industry are very exacting for financial sources. By the obtaining of financial sources must be accepted kinds of financing. In the concrete mining company we were determining, which kind of financing is possible to use to finance mini ng projects with acceptance of risk. With the selection of the form of financing are conn ecting risks, that we are analyzing and we were pr...

The original method for the assessment of risk of geodynamic processes in mountain areas was developed. The proposed indices are as follows: relief structural stages, degree of tectonic break, stru ctural intersection nodes of faults, tectonic valleys, the intensity of slope processes, permafrost f eatures, and landscape differentiation of the territory. The geodynamic indices were estimated with factor maps of the GIS-project using the analysis of morphotectonic block structure, and the field geomorphological and...

The paper objective is to assess the social responsibility issues among the SMEs in Romania. We seek to find the main charac teristics of responsible citizenship among the SME sector and its internal and external drivers.

The contribution deals by the suggestion of new manufacturing technology for hand- made screw blade for wind-power plant. A wind turbine is a device that converts kinetic energy from the wind into electricity for distribution. Wind turbine blades are most often fabricated by hand using multiple layers of fi breglass cloth. The traditional method is for the sheets to be cut to shap e, laid down in a mould by hand, sprayed or rolled with resins, and finally cured. The automation of the manufacturing of hand-made pro...

The study includes the geochemical data of foraminifera in Pleistocene-Holocene aged marine sediments outcropping along the coasts of Gulf of Antalya and around the Belek, Kadriyeköy and Kumköy settlement places in the south of the Serik (eastern Antalya) in Turkey. The chemistry of benthic foraminifera tests can include records of seawater and provide data on environmental interpretation. For this purpose a total of 28 benthic forami nifera were selected from similar genus and species of benthic foraminifera an...

The Maastrichtian aged Dikmendede Formation in the Orhaniye (Kazan-Ankara) area formed in a deep-marine environment. The formation consists of alternating green, grey-coloured turbiditic conglomerate, sands tone, shale, claystone and marl. The unit has typical flysch features and has sediment ary structures such as thin/thick bedding, normal graded bedding, erosional surfaces, flut e casts, load structures, ball-and-pillow structures, bounce marks, slump structur es and numerous biogenic traces. The conglomerates ...

Sedimentary analysis was based on formati ons of inferior Molasse which belong to Burdigalian and Badenian, being performed in representative natu ral claddings from Prahova, Romanian area. Complete successions of Variegated Formation and Globigerina – bearing Tuffs and Marls Formation may be followed in V. Mare – Alunis and Slanic–Piatra Verde Quarry (Prahova). The Variegated Formation is mostly ruditic– arenitic at its base, grading into a silty–lutitic sequence at the top. It mainly consists of conglo...

The most recent glacial period span in the interval 110,000 to 10,000 years ago. Recent geomorphologic studies in the Eastern Thracian plane have shown significant change in the sedimentation rates since the Younger Driass (between 10,800 and 9500 BC), which may provide a new inside on the climatic evol ution of the region. It was found that all local rivers are in an aggradation phase, depositing up to 3 m thick mudstone deposits on top of a colder climate’s well-washed, coarse sandstones. The aggradation resul...

In this paper the results of sedimentological analysis of coal in 2010 at the lokality Petka (western coal basin Kostolac). Are presented variations of petrographic composition of coal matter (lithotypes, microlithotypes and macerals), mineral admixtures (clay, aleurite and marl) and locally occurring epigenetic mineralizations. The Kostolac Neogene Basin (Figure 1), cont aining three tick lignite beds of Pontian age[1] is one of important energetic resources of Serbia and is the bases for operating two lignite-fi...

The importance of understanding seismic waves and measurement waves has gravitated form the seismic prediction to training electromagnetic propagation. Seismic electromagnetic waves may be useful in shor t-term earthquake prediction. It was found our observation system is influenced by lightni ng as far away as about hundreds km in the VLF and LF range. It is found that the increase in the number of LF and VLF electromagnetic pulses before earthquakes were generated by lightning. Some researches show that there is...

The aim of the paper is to in form on the need to apply geological information in land use planning and other state administration spheres, such as building office services. The study was carried out with in the locality specified by a map sheet 15 44 07 in 1:10 000 scale, in the cadastral district of Petr vald, Orlova, Horni Such a in the north-east of the Czech Republic close to the Polish border. The subject of the study is an evaluation of geobarriers of rock workability, inundatio n area and radon index. A si...

The aim of this paper is to develop a methodology for predicting the potential of future drilling, not merely on average but more specifically as a function of the grades obtained in the drilling in Chadormalu Ir on ore deposit. In most cases additional samples are collected to reduce the overall unc ertainty on the estimation. To do this, the GET function method is used to find the bore hole locations that are more sensitive in reducing the local and global uncertainty than others. This function considers the Gra...

Aquaculture is a rapidly growing industry that is vital to supplying the increasing demand for food production worldwide. In recent decades, Aristichtys nobilis (Bighead carp) and Hypophthalmichthys molitrix (Silver carp) have been widely introduced into European waters for algal control and as a food source. This species are very sensitive to various environmental and physical stresses and thus more susceptible to bacterial invasions resulting in disease outbreak and mortality. The ma jority of bacterial fish pat...

Investment in the mine scope is one of the most risk able fields. In the new management skills, risk management is a ve ry important feature. During of the execution of a mine project, the variation of each effective factor can affect on the execution, production and efficiency, therefore a mining project ma nager must be knowledge about of any effective parameter such as Annual productivity, annual benefit, annual cost and exploitation time, in project The net present value (NPV) is one of the most important meth...

The paper deals with the verification of the possibility of using the froth separation to separate highly concentrated coarse-grained black coal slurry. For laboratory research samples of raw coal with a grain size fraction of 0,2 - 2 mm from the Paskov Mine were used. The achieved se paration results confirmed the ability of froth separation to separate coarse-grained highly concentrated sl urry. The coal slurry in concentrations of 332 kg.m -3, 400 kg.m-3, 500 kg.m -3, 600 kg m -3, 668 kg m-3 was successfully se...

In the world, over 18 million vehicles are rejected annually from operation. The spent catalysts are obtained from th e vehicles at the end of their life cycle as well as the vehicles which do not meet the prescribed st andards in the ECO test respected to the composition of exhaust gases. The basis of each catalyst is a ceramic monolith with deposited valuable platinum metals. The spent catalysts are solid waste and also the rich raw material for recovery of precious metals. The aim of this paper is a separation ...

Energetic theory of disintegration repres ents the starting point for the search for optimum of rock cutting, as it issues from the instantaneous advance rate of the indentor, specific cutting energy (am ount of energy used for cutting of a unit volume of rock) depending of applied thrust. Search for optimum on experimental drilling stand using the optimization met hods is impossible due to technological limitations (limited area for optimum search due to limited rock sample length, duration of experiment, possibl...