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Abstract

There are two kinds of wastewater that may originate at a dairy plant: post-production and nonproduction waste. Dairy wastewater treatment is a process consisting of several stages. In the pre-treatment stage, fat and sand is removed from wastewater. The second stage treatment consists mainly in aerobic treatment with activated sludge, advanced oxidation methods and an anaerobic treatment. In recent years, more and more plants have been treating their wastewater in SBR type reactors, because they are flexible at work and enable the user to change conditions to suit the variable quality of raw wastewater. The research on the kinetics of the wastewater treatment process in an SBR reactor has been conducted. The removal of several factors such as nitrogen compounds, TOC, phosphorus and the kinetics of oxygen concentration and redox potential have been analyzed. The experiment was carried out in two 12 dm3 volume SBR reactors in a lab-scale. The SBR reactors were operated with a cycle time of 12 hours with three hours of filling, seven hours of aeration, an hour of sedimentation, half an hour of decantation and half an hour of technical break. In presented research average parameters of raw wastewater were: TOC 329 mg C/dm3, ammonium nitrogen I I. 15 mg NN1,/dm3, and total phosphorus 15.42 mg P/dm3.
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Authors and Affiliations

Mariusz Wojnicz
Anna M. Anielak
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Abstract

In a rapidly changing environment due to globalization, we are constantly looking for appropriate paths and strategies for cities and regions while taking into account the territorialisation of growth factors. As a result, we can observe an increase in development concepts that seek to define the conditions for urban resilience that could result in sustainable development despite an unstable environment. The author places his reflections in the context of Upper Silesia’s conurbation development challenges. He examines the current path of the region’s development and analyses the role that the application of “smart city” and “creative city” concepts could play in this process. Rather than comparing the efficacy of the two approaches, he suggests a reflection on the proportions of different bundles inside the development process. He also highlights the limits of a smart city approach and shows to what extent those limits can be exceeded through the application of a creative city strategy. Due to the economic and social diversity of the Upper Silesian metropolitan area, there is a significant opportunity for the development of the creative economy that could determine the competitive advantage of this area in the coming decades.

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Authors and Affiliations

Robert Pyka
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Abstract

The aim of our research is to gain understanding about material flow related information sharing in the circular economy value network in the form of industrial symbiosis. We need this understanding for facilitating new industrial symbiosis relationships and to support the optimization of operations. Circular economy has been promoted by politics and regulation by EU. In Finland, new circular economy strategy raises the facilitation of industrial symbiosis and data utilization as the key actions to improve sustainability and green growth. Companies stated that the practical problem is to get information on material availability. Digitalization is expected to boost material flows in circular economy by data, but what are the real challenges with circular material flows and what is the willingness of companies to develop co-operation? This paper seeks understanding on how Industry 4.0 is expected to improve the efficiency of waste or by-product flows and what are the expectations of companies. The research question is: How Industry 4.0 technologies and solutions can fix the gaps and discontinuities in the Industrial Symbiosis information flow? This research is conducted as a qualitative case study research with three cases, three types of material and eight companies. Interview data were collected in Finland between January and March 2021. Companies we interviewed mentioned use-cases for sensors and analytics to optimize the material flow but stated the investment cost compared to the value of information. To achieve sustainable circular material flows, the development needs to be done in the bigger picture, for the chain or network of actors, and the motivation and the added value must be found for each of them.
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Authors and Affiliations

Anne-Mari Järvenpää
Vesa Salminen
Jussi Kantola
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Abstract

Essential sorts of disinfecting agents and principles of their action have been considered in the paper. Results of research on application of washing-disinfecting liquids, containing silver nano-particles, in meat industry have been presented. It has been established that liquids characterized by very efficient bactericidal and fungicidal properties can be prepared by composition of toxieal ly performing silver nano-particles, some degreasing agents, reducing surface tension, and frothing agents. The listed components eliminate "insulating effect" of fat particles in which bacteria are suspended and facilitate silver nano-particle contact with bacteria and fungi, increasing this way biochemical effect of silver nano-particles.
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Authors and Affiliations

Michał Konopka
Zygmunt Kowalski
Zbigniew Wzorek
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Abstract

Nothing says more about us than what we leave behind. That makes ancient refuse an inexhaustible source of information for archaeologists.
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Authors and Affiliations

Dariusz Rozmus
1

  1. “Sztygarka” City Museum in Dąbrowa GórniczaInstitute of Law Studies, Humanitas Academyin Sosnowiec
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Abstract

The cement industry has been using waste as a raw material for many years. Waste is also used as alternative fuel. Cement plants are an important element of the waste management system and fit the idea of a circular economy. When waste is recovered in the cement production process, direct and indirect CO 2 emissions are partially avoided. This article discusses the cement industry in Poland. The current situation in terms of the use of alternative fuels and raw materials in Poland, the different types of waste and the amount of waste used is discussed. The article discusses changes in the amount of waste (the increase in the amount of waste used as raw materials from the year 2006 to the year 2019) and the types of waste recovered in the cement production process and the possibility of closing material cycles on the plant scale (recycling to the primary process – cement kiln dust) and industry (using waste from other industries: metallurgy – granulated blast furnace slag, iron bearings; energy production – fly ash, reagypsum/phosphogypsum, fluidized bed combustion fly ash, and fluidized bed combustion bottom ash; wastewater treatment plants – sewage sludge, etc.). The analysis shows that the role of cement plants in waste management and the circular economy in Poland is important. Industrial waste from metallurgy, power plants, heat and power plants, wastewater treatment plants, and municipal waste is used as the raw material for the cement industry, leading to an industrial symbiosis.
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Authors and Affiliations

Alicja Uliasz-Bocheńczyk
1
ORCID: ORCID
Eugeniusz Mokrzycki
2
ORCID: ORCID

  1. AGH University of Science and Technology, Faculty of Civil Engineering and Resource Management, Kraków, Poland
  2. Mineral and Energy Economy Research Institute, Polish Academy of Sciences, Kraków, Poland
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Abstract

The article presents the architectural heritage created as a part of the Central Industrial District in the context of the need for its preservation and protection. Presented are selected topics and problems associated with the current technical condition of both industrial and residential buildings. The analysis contain also the impact of modern conservation doctrines and their ability to preserve works of COP’s architecture with the specific conditions of ownership, poor awareness of users and owners, and a large shortage of historical planning sources.

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Authors and Affiliations

Marcin Furtak
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Abstract

Mineral fillers are mainly utilized in the production of printing and writing papers (P&W) to improve their optical features and their vulnerability to printing. With the high cost of pulp, the aim of their introduction has been to increase mineral loading in paper and reduce the overall cost of production. For many years the only method of paper formation was acid technology, while the only raw material of choice for filling and coating paper and cardboard was kaolin (in the beginning of the 1970s it was 80% of fillers and 94% of coating grades used in Western Europe, while in the USA – 92% and 96%, respectively). The onset on new methods of acid-free (alkaline) paper forming caused a drastic reduction in the kaolin demand for cost-competitive calcium carbonate: GCC – Ground Calcium Carbonate) and PCC – Precipitated Calcium Carbonate. This also resulted from the progressive self-destruction of machine-made acid papers. In 2013, the share of calcium carbonate in the total production of fillers was 83%, while kaolin accounted for 10%, and talc – 7%. The article presents the parameters of principal mineral fillers for the paper industry and the main reasons why they are suitable for particular kinds of paper. Kaolin, due to the platy nature of its main mineral constituent – kaolinite, is preferred in multiple coating papers. The choice of GCC is beneficial because of its low price and properties (especially whiteness). PCC , due to the possibility of shape and particle size modification serves as filler in uncoated woodfree papers, the key features of which are expected to be lightness and opacity. Size distribution is the main difference between PCC and GCC . The article also presents tendencies observed over the last several years in the paper market in Poland, i.e. in a significant growth in coated paper and board for packaging, as well as the decreasing demand for newspaper, which is a consequence of progressive digitalization.

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Authors and Affiliations

Ewa Lewicka
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Abstract

The research was carried out on two different industrial wastes deposited on the premises of a chemical plant: used graphite electrode after electrolysis of brine applying the mercury-cathode method and coal catalyst past the usage period after the synthesis of vinyl chloride. The need for utilization of the waste necessitated development of a fast and reliable procedure for mercury determination. We have found procedures for mineralization of coal samples and determination of small concentrations of mercury by the cold vapour of atomic absorption spectrometry (CV AAS) in the available literature. Six procedures for passing mercury from the examined waste into solutions were tested, and mercury was assayed using the titration method of Wickbold and CV AAS. The results were evaluated statistically. It has been found that four ways to mineralize the examined industrial waste samples can be used.
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Authors and Affiliations

Jerzy Ciba
Joanna Kluczka
Maria Zolotajkin
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Abstract

Predictive mathematical models have useful applications in the food industry – preventing the loss and wastage of food, thereby conserving resources.
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Authors and Affiliations

Elżbieta Rosiak
1

  1. Institute of Human Nutrition SciencesWarsaw University of Life Sciences (SGGW)
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Abstract

The main objective of the research work was to identify the dimensions of complexity and study the relationship between these defined dimensions in the industrial automation sector. To achieve these objectives in the study, there was assumed the following major hypothesis: With the increasing role of dynamic cross-section of the complexity there is growing importance of relationship dimension for competitive advantage. In the study there were diagnosed four dimensions of complexity. Existence of the relationship between these four identified dimensions of complexity occurred by the use of the Fisher’s exact test, which is a variant of the test of independence ��2. Furthermore, there were calculated V-Cramer factors to estimate the intensity of the above-mentioned relationship between analyzed dimensions. The research discovered that the three out of four dimensions such as the number of elements, variety of elements and uncertainty depend on the last dimension of complexity which is the relationship between elements. In the turbulent environment there is a growing importance of the relationship dimension. It forms competitive advantage and is a key condition of success in creating a new type of modern enterprise strategy that occurs within complexity management in the industrial automation sector.
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Authors and Affiliations

Anna Lewandowska-Ciszek
1

  1. Poznan University of Economics and Business, Department of Logistics, Poland
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Abstract

The article presents the urban layout, which is a best-preserved example of industrial estates in northern Italy. The subject of the research is a public space of the Crespi d’Adda settlement in the Province of Bergamo in Lombardy. Particular attention is paid to green areas occurring there, and their current use. Program of the public areas was very varied. The main role, besides the factory, held the public park, which is an important compositional and ideological. element of the layout. Research task was to show on example of Crespi, the current situation of former settlements in northern Italy, which are for the author reference material for settlements analyzed in Poland.

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Authors and Affiliations

Katarzyna Elwart
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Abstract

The paper presents results from social research on the Polish business representatives potentially interested in using the floating buildings. The main purposes of the study were to assess the level of knowledge about floating buildings and diag-nose stimulants and inhibitors of their development in the hotel, catering, and water tourism industry.

Combining the quantitative and the qualitative methodology, research was conducted using an on-line survey (CAWI)and Focused Group Interviews (FGI). Both involved a non-probabilistic, purposive sampling to reach a specific subgroup of the industry: owners or employees of catering, hotel or water tourism companies having or considering having a floating building. The group included both new and long-standing companies using facilities on water or with direct and indirect access to the water.

The study identified stimulating and inhibitory factors broken down into internal (context-independent) and external (context-dependent) conditions. Results show that in Poland floating commercial buildings are a niche topic but also a de-velopable one. Although 71% of the respondents notice difficulties resulting from the insufficient infrastructure and 66.5% of them indicate the lack of legal regulations, they also see the potential of floating buildings: depending on the industry, from 90 to 95% respondents find them “definitely attractive” or “rather attractive”. The most common reason for rejecting floating development is the lack of attractive moorages in the area (43.5% answers).

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Authors and Affiliations

Łukasz Piątek
Aleksandra A. Wycisk
Dariusz Parzych
Katarzyna Modrzejewska
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Abstract

The current market situation shows that enterprises are still struggling to digitize their business through the integration of the Internet of Things (IoT), artificial intelligence (AI), cloud technologies and other more advanced technologies, but the fifth industrial revolution is knocking on the door. This article deals with the analysis and evaluation of the impact of Industry 5.0 on entrepreneurs. Industry 4.0 analysis provides results based on interviews with practitioners as well as sales representatives. The main part of the article focuses on the business situation, where the goal was to identify existing gaps along with opportunities and threats. This analysis also describes the best way how to transform in times of the next industrial revolution. Study addresses the approach of integrating human workers in the supply chain in cooperation with automated processes. The purpose of this study is to confirm or refute whether companies are ready for another industrial revolution.
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Authors and Affiliations

Laura Lachvajderová
1
ORCID: ORCID
Jaroslava Kádárová
1
ORCID: ORCID

  1. Technical University of Košice, Department of Industrial and Digital Engineering, Slovakia
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Abstract

The relevance of the study is due to the need to identify the problems, features and consequences of strategic transformations in the metallurgical industry of Ukraine in the context of reviewing the circular process of organization of the economy, where the blast furnace, open-hearth and rolling production waste are of a high potential. The reuse of metallurgical waste has a number of economic advantages in terms of the chemical composition of the product life cycle. Blast furnace slag is suitable as a raw material in cement production and can be used as fillers in the construction of roads, hydraulic and environmental facilities, during reclamation works, etc. Agriculture actively uses slag as a fertilizer that contains potassium, magnesium, phosphorus, magnesium, boron – as an additive that reduces soil acidity. Currently, all slag can be processed into fertilizers or building materials. The economic effect of the use of slag in construction is accounted for in the relatively low cost of products, improvement of the quality and durability of the structures. The main positive consequences of smartization of the metallurgical industry are increase of its resource efficiency and environmental friendliness, negative – the low level of blast furnace slag use in various sectors of the economy compared to the experience of developed countries, an insufficiently developed legal framework. The mechanism of state management of the use of secondary raw materials, especially metallurgical origin, in conditions of shortage of energy resources and the intensive use of non-renewable natural resources remains an important scientific problem and requires further research.
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Authors and Affiliations

Yuri Zakharovich Drachuk
1
ORCID: ORCID
Elena Stalinskaya
2
ORCID: ORCID
Elizaveta Snitko
3
ORCID: ORCID
Evgeniya Zavgorodnyaya
3
ORCID: ORCID
Monika Jaworska
4 5
ORCID: ORCID
Larisa Savyuk
6
Dmitry Cheylyakh
7
ORCID: ORCID

  1. Institute of Economics Industry of the National Academy of Sciences of Ukraine, Kiev, Ukraine
  2. Department of International Economic Relations, Vasyl Stefanyk Precarpathian National University, Ukraine
  3. Department of Management, Lugansk National Taras Shevchenko University, Ukraine
  4. Akademia Humanistyczno-Ekonomiczna w Łodzi
  5. APEIRON Wyższa Szkoła Bezpieczeństwa Publicznego i Indywidualnego w Krakowie, Poland
  6. Ivano-Frankivsk Legal Institute of Odessa National Law Academy, Ukraine
  7. Institute of Industrial Economics of the National Academy of Sciences of Ukraine, Ukraine
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Abstract

The article discusses the problem with modifications of plans of water areas and the forms of their borders which have been inscribed into the history of all city structures related to water. It can be observed that the modifications made in recent decades very often concern the transformations of former industrial sites. Many such structural changes are taking place within signifi cant areas which have fragmented central parts of cities and created voids in the urban fabric. They are being applied to many former shipyards and ports. Research shows that the formation of new connections between land and water in these transformation processes is essential. More frequently, those conversions that are currently being realized change the constructions of wharves and lead to the development of plans drawing new borders between land and water. In these cases water is introduced into land areas and new land surfaces are being created over existing bodies of water. These operations can be considered extremely valuable in achieving the intended eff ects of transformations of post-industrial areas. They are perceived as an excellent possibility to strengthen the relationship between the city structure and water. At the same time they create an opportunity to achieve a high quality of architectural and landscape solutions and the quality of spaces in both social and economic terms.

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Authors and Affiliations

Izabela M. Burda
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Abstract

The concept of a Circular Economy assumes that the value of products, materials and resources is to be maintained in the economy for as long as possible to ultimately reduce waste generation to a minimum. In this concept, raw materials are repeatedly put into circulation many times, often passing from one branch of industry to another. So energy, water, metal ores, oil, gas, coal and others, and wherever possible, their replacement with renewable resources (wind and solar energy, natural resources). It is important, and this is the essence of the Circular Economy, the maximum re-use of scarce materials and raw materials from already produced and used products. This concept has found the support of the European Commission and activities in this area will successively be implemented through appropriate legal acts of the European Union. The need to implement solutions in the field of minimizing the consumption of raw materials, materials and energy or reducing waste production is also felt by consumers and industry. The packaging industry is particularly interested in implementing the concept of a Circular Economy. Due to the dynamic growth of the packaging market, which in 2017 reached around EUR 9.6 billion in Poland (data from the Polish Chamber of Packaging) and the increasing amount of post-consumer waste, it is necessary to introduce solutions limiting the consumption of raw materials and energy throughout the product life cycle.

The aim of the article is to present current practices regarding the reduction of the negative impact of packaging on the environment and the indication of directions for the implementation of the Circular Economy concept in the packaging industry.

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Authors and Affiliations

Agnieszka Kawecka
Agnieszka Cholewa-Wójcik
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Abstract

The aspect of climate change in the modern world is one of the broader issues of global social and economic policy. Climate change implies a modification of the business environment, especially the energy sector. Any change in the conditions in which the company operates is the cause, the effect of which becomes its financial situation during the relevant period. Therefore, climate policy will play an increasingly important role in shaping the energy of the future. At present, energy companies are taking measures to process primary energy from fossil fuels, in particular coal, in an efficient and environmentally friendly way. The article presents the impact of international climate agreements on the energy and coal industries. The latest agreement signed in Paris defines a global plan to minimize the dangerous effects of global warming on the climate arising from carbon emissions. The most important outcome of the agreement was the unification of many countries with a common goal. The European Union played a key role in signing the first legally binding agreement in the world, which is also a forerunner in the carbon trading system: EU ETS (European Union Emission Trading Scheme) The US-based CO2 emissions trading system has become a model for the European Commission. In addition, the article highlights the correlation between the EUA ( European Union Allowances) and “ARA coal” prices as well as the role of the coal market in price formation of emission allowances.

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Authors and Affiliations

Tadeusz Olkuski
Katarzyna Piwowarczyk-Ściebura
Andrzej Brożek
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Abstract

The purpose of this article is to investigate the problematic aspects of standardization of energy management systems in Russian enterprises. The main characteristics of energy management, existing standards in the field of energy management are given. To study the best practices and the effectiveness of the implementation of the energy management system in 2017, the Ministry of Energy of Russia, with the participation of the Federal State Budgetary Institution “Russian Energy Agency” the Ministry of Energy of Russia, carried out the monitoring of energy efficiency management and the implementation of energy management systems in the practice of Russian companies. The peculiarity of the introduction of energy management systems in the practice of managing Russian enterprises has been identified, which consists in the fact that it occurs based on the already implemented quality management system, environmental management, labor protection, when a lot of work has been done (document management, internal audit system, corrective actions, training, provisions providing feedback and the possibility of submitting proposals, etc.). Like any quality management system, the successful implementation of this standard depends on the involvement of all levels and functions of the organization’s management in this process, and especially on top management.
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Bibliography

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Authors and Affiliations

Ramilya Savchuk
1
Alexandr Cherkasov
2
Pavel Kondratiev
1
Semen Matskepladze
1

  1. Department of Quality Management, Russian University of Transport, Russia
  2. Department of Transport Construction in Extreme Conditions, Russian University of Transport, Russia
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Abstract

The circular economy model is based on several priority areas, including biomass and bio-based products. Focusing on them and their use should certainly take their cascading into account use, including how energy from waste from the wood industry is managed. Biomass is one of the most frequently used renewable energy sources in Poland, and in the European Union it satisfies 6% of primary energy. The CE (Circular Economy) model assumes that the reuse, processing and regeneration of a product requires less resources and energy, and is more economical than conventional material recycling, as low quality raw materials. The current model of waste management must take energy recovery into account, without which it is impossible to close the balance sheet of management of many groups of waste. This is also important from the economic point of view. Chemical energy, which is contained in a large part of waste, can be used for energy purposes, including the production of electricity and heat. Reducing the use of raw materials is the most effective environmental approach to solving the waste problem. However, this requires reducing the extraction and consumption of materials, challenging existing production and consumption patterns. In the circular economy model there is a huge difference in approach to recycling leading to new products that create transport and production, new jobs and possible GDP (Gross Domestic Product) growth. The aim of the study is to analyze the use of waste from the wood industry and to present possible solutions for its cascade use, taking the currently implemented circular economy model (CE) into account.

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Authors and Affiliations

Natalia Generowicz
ORCID: ORCID
Zygmunt Kowalski
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Abstract

Geographical Information Systems have become essential tools for land analysis and the subsequent decision making in many fields of human activity. In the field of mining, GIS applications have appeared in ore deposit modelling, environmental pollution, or planning of mining spaces. In this research, the powerful multicriteria tools of GIS platforms have been applied for the determination of an index that has been called “Exploitability Index”. This index allows analyzing a series of outcrops of industrial aggregates, to help in the selection of the most adequate one to be enhanced from a mining approach. The multicriteria analysis has been applied for its determination, and as a result of this research, a model is proposed. The main criteria that condition the decision have been established in this model, along with their subsequent hierarchization and their weighting. The proposed model is applied to a specific case: the analysis of a series of outcrops of industrial aggregates (ophites) in Cantabria, Spain. After defining the Exploitability Index for those ophitic outcrops, it has been observed that the only deposit that has been classified as very suitable for its exploitation is the only one that has been really exploited, supporting the proposed methodology.

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Authors and Affiliations

Gema Fernández-Maroto
Julio Manuel de Luis-Ruiz
Raúl Pereda-García
Beatriz Malagón-Picón
Rubén Pérez-Álvarez
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Abstract

This article presents the results of studies assesing the significance of the most important macro- and microeconomic factors affecting investors’ propensity to invest in mining. The Polish mining industry in recent years has seen intensive restructuring processes which have considerably affected the status of fixed assets required for the exploitation of useful minerals. In order to efectively manage technological progress in mining plants, it is necessary to understand the role of individual, variable factors influencing investors’ propensity tomake specific expenditures. In the analysis, mathematical statistics and econometric modelling methods were applied to determine the nature of correlations between the values studied and their significance. This examination applied statistical data accumulated by economic entities from 2000–2010. A linear econometric model waspresented illustrating the relationship between capital expenditure in mining and such indicators as fixed assetsvalue, GDP, real interest rate, consumption levels of fixed asset components in mining, and various other factors. Structural parameters of a function specifying the level of investment expenditure can be determined based on statistical data which has been appropriately processed so that the model constructed reflects the economic process studied in relevant way.

Such a model is not free of defects typical in statistical models; however, it simultaneously enables one toobtain valuable information concerning the impact of the factors studied on the value of such expenditure, and the theoretical possibilities to exchange the specific quantity of one factor for another factor. In the final version of the model, it is often sufficient to include only these independent variables which contribute the most essential information to the independent variable. This often simplifies the final form of the model without simultaneous limiting of its importance in explaining the economic phenomenon studied and the possibilities of its practical application. In the final selection of significant variables captured in the model, the method of information capacity indicators was used.

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Authors and Affiliations

Tadeusz Franik
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Abstract

Emerging technologies represent the direction of the new industrial revolution of promoting sustainable economic and social development, and strategic emerging industries have developed rapidly in China. The development of these emerging technology industries requires more mineral resources as raw materials, especially the need for specific minerals, has increased. The unsatisfied growing demand for minerals used in emerging technologies or an unexpected supply disruption in major producing countries could have an impact on economic development. There are only several studies on the supply of mineral resources from the perspective of mineral resources needed by the development of China’s emerging industries. To assess the criticality of the minerals needed by the strategic emerging industries in China, this paper adopts three indicators: import concentration, the volatility of prices and the application requirements by the Chinese 13th five-year plan dedicated to strategic emerging industries in 2016. Furthermore, 34 types of nonfuel minerals and mineral raw materials are separated into three categories. Finally, this paper indicates that the three indexes are all high for 8 minerals with supply risks, application in emerging technologies, and substantial market fluctuations which need the support of special policies. Two indexes of three Level-II indicators are high for 14 minerals which need different policy combination measures, and one index is high for 12 minerals which also needs attention, all of which were analyzed.

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Authors and Affiliations

Yun Yu
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Abstract

The introduction of the article presents the problem of interpreting the level of fire hazard basing on Graham’s ratio, which, in certain ranges of the value of its denominator, may be wrong. The range of credibility for the index is also discussed. The issue of nitrogen inertisation and its influence on the value of the discussed index is also addressed. To determine the influence, two statistical samples were set. They consisted of the results of precise chromatographic analyses of the air samples collected in the longwall areas which were not subjected to inertisation and in the areas where nitrogen was applied as the inert gas. Then, with Student’s t-test, there was conducted a comparative analysis of both groups with regard to the equality of the average concentrations of gases emitted in the coal self-heating process. At the end, there were developed criteria for the application of Graham’s ratio for the air samples of the increased content of nitrogen, which, according to the discussed index, did not indicate the occurrence of an endogenous fire hazard.

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Authors and Affiliations

Lucjan Świerczek
ORCID: ORCID

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