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PubMed | Mendel University in Brno and The Institute of Technology and Businesses in Ceske Budejovice
Type: Journal Article | Journal: Science and engineering ethics | Year: 2016

This paper focuses on compost use in overpasses and underpasses for wild animals over roads and other similar linear structures. In this context, good quality of compost may result in faster and more resistant vegetation cover during the year. Inter alia, this can be interpreted also as reduction of damage and saving lives. There are millions of tones of plant residue produced every day worldwide. These represent prospective business for manufacturers of compost additives called accelerators. The opinions of the sale representatives with regards to other alternatives of biowaste utilization and their own products were reviewed. The robust analyzes of several accelerated composts revealed that the quality was generally low. Only two accelerated composts were somewhat similar in quality to the blank sample that was produced according to the traditional procedure. Overlaps between the interests of decision makers on future soil fertility were weighed against the preferences on short-term profit. Possible causes that allowed the boom of these underperforming products and the possible consequences are also discussed. Conclusions regarding the ethical concerns on how to run businesses with products whose profitability depends on weaknesses in the legal system and customer unawareness are to follow.


PubMed | University of Zilina and The Institute of Technology and Businesses in Ceske Budejovice
Type: | Journal: Science and engineering ethics | Year: 2016

From the early days of philosophy, ethics and justice, there is wide consensus that the constancy of the laws establishes the legal system. On the other hand, the rate at which we accumulate knowledge is gaining speed like never before. Due to the recently increased attention of academics to climate change and other environmental issues, a lot of new knowledge has been obtained about carbon management, its role in nature and mechanisms regarding the formation and degradation of organic matter. A multidisciplinary techno-economic assessment of current composting standards and laws that took into account the current state of knowledge about carbon management was carried out as a case study. Economic and environmental damage caused by outdated laws was revealed. In addition, it was found that the introduction of the best composts into the market is permitted, causing additional negative environmental as well as economic impacts.


Senitkova I.,The Institute of Technology and Businesses in Ceske Budejovice | Bednarova P.,The Institute of Technology and Businesses in Ceske Budejovice
International Multidisciplinary Scientific GeoConference Surveying Geology and Mining Ecology Management, SGEM | Year: 2015

An indoor air quality seems to be one of the main problems of school buildings. This study evaluated the indoor air quality in Czech Republic by comparing the air change level and students performance in lecture halls. The parameters of interest were indoor carbon dioxide (CO2), total volatile organic compounds (TVOC), temperature, relative humidity (RH) and air change level. The difference in perceived air quality and odor intensity was obvious between the different ventilation conditions. The acceptability of air quality assessed by the sensory panels showed significant correlation with the values of CO2 and TVOC concentrations. The indoor air quality in Czech Republic classrooms affects the health of students. The school buildings relating to indoor European Standard are mostly evaluated as the non-low polluting buildings. Therefore, indoor air quality needs to be considered as an important problem concerning to study effectivity and students’ performance. The study of indoor air acceptability concerning to indoor odors under occupancy and its effect on perceived air quality influenced by air change rate are presented within the paper. The indoor air quality improving by higher ventilation levels 2, 4, 7 l/person, substantially improves the student’ performance (1 - 3 %). Increased ventilation rate usually will increase indoor air quality what definitely increase learning especially mathematic and problem tasks solving. © SGEM2015.


Senitkova I.,The Institute of Technology and Businesses in Ceske Budejovice | Bednarova P.,The Institute of Technology and Businesses in Ceske Budejovice
International Multidisciplinary Scientific GeoConference Surveying Geology and Mining Ecology Management, SGEM | Year: 2015

Some common and new office material combination impact on perceived working environment quality used as surface interior materials is presented in this paper. Traditional and progressive materials comparison reveals new fact regarding the TVOCs concentration. Task of the study was to investigate the possibility using individual material surfaces sorption ability. The chemical analysis and sensory assessments identifies health adverse of indoor air pollutants (TVOCs). The knowledge about the targeted use of sorption effect can be used already in the office working environment design phase. The results demonstrate the various sorption abilities of various indoor materials as well as various sorption ability of the same indoor material in various combinations. © SGEM2015.


Juhas P.,The Institute of Technology and Businesses in Ceske Budejovice | Senitkova I.,The Institute of Technology and Businesses in Ceske Budejovice
International Multidisciplinary Scientific GeoConference Surveying Geology and Mining Ecology Management, SGEM | Year: 2015

The results of numerical analysis of middle and higher strength structural steels using in compression members are presented in the paper. The homogeneous I cross-sections of the members with web slenderness βw = 40, 48, 60, 80, 120; member length L = 3,0; 4,0; 5,0; 6,0 m and structural steels S235, S275, S355, S420 and S460 were assumed. The full theoretical plastic load Npl, local post-critical load Nul and global buckling load Nu,y and Nu,z for all considered members by the European standards EN 1993-1-1 and EN 1993-1-5 for the design of steel structures were calculated. It is known that these standards have been transformed into national standards of all CEN countries which are generally used from 2010. The effective applying of the higher strength steels on the compressed members taking in consideration their shaping and material optimization is presented in this paper. The obtained numerical results are compared and analyzed from the economical point of view. © SGEM2015.


Marousek J.,The Institute of Technology and Businesses in Ceske Budejovice
Environmental Science and Pollution Research | Year: 2014

A brief report on the development of novel apparatus is presented. It was verified in a commercial scale that a new concept of anaerobic fermentation followed by continuous pyrolysis is technically and economically feasible to manage previously enzymatically hydrolyzed waste haylage in huge volumes. The design of the concept is thoroughly described, documented in figures, and biochemically analyzed in detail. Assessment of the concept shows that subsequent pyrolysis of the anaerobically fermented residue allows among biogas to produce also high-quality biochar. This significantly improves the overall economy. In addition, it may be assumed that this applied research is consistent with previous theoretical assumptions stating that any kind of aerobic or anaerobic fermentation increases the microporosity of the biochar obtained. © 2014 Springer-Verlag Berlin Heidelberg.


Juhas P.,The Institute of Technology and Businesses in Ceske Budejovice | Senitkova I.,The Institute of Technology and Businesses in Ceske Budejovice
International Multidisciplinary Scientific GeoConference Surveying Geology and Mining Ecology Management, SGEM | Year: 2014

The thin webs of steel members are laterally buckling under static loading and laterally vibrating under repeated dynamic loading. The consequence of that can be arising and successive development of fatigue cracks along the welded connections of the thin webs with flanges and stiffeners. Therefore, the fatigue strength and life-time of thin-walled steel members depend beside of usual material-technological and structural influences also on local stability aspects. The extensive experimental-theoretical investigation of thin-walled hybrid steel plate girders and columns with accent on their fatigue failure mechanisms and local stability aspects is presented within the paper. The outcome of obtained knowledge and results is the original empirical formula for the limitation of web slenderness that can be used for the reliable and economical design of steel members which are subjected under repeated dynamic loading. © SGEM2014.


Senitkova I.,The Institute of Technology and Businesses in Ceske Budejovice
International Multidisciplinary Scientific GeoConference Surveying Geology and Mining Ecology Management, SGEM | Year: 2014

The material combination impact on perceived indoor air quality for various surface interior materials is presented in this paper. Traditional and progressive materials comparison reveals new fact regarding the sum of volatile organic compounds (TVOCs) concentration. The using possibility of individual material surfaces sorption ability was investigated. The chemical analysis and sensory assessments identifies health adverse of indoor air pollutants (TVOCs). In this study, emissions and odors from different common indoor surface materials were investigated in test chamber under standardized conditions. Chemical measurements (TVOCs concentration) and sensory assessments (odor intensity, perceived air quality) were done after building materials exposure to standardized conditions. The impact of individual materials and their interaction effects to the perceived air quality will be discussed within the paper. The knowledge of targeted sorption effect can be used already in the interior design phase. The results demonstrate the various sorption abilities of various indoor materials as well as the various sorption abilities of the same indoor materials in various combinations. © SGEM2014.


Vochozka M.,The Institute of Technology and Businesses in Ceske Budejovice | Marouskova A.,The Institute of Technology and Businesses in Ceske Budejovice
Clean Technologies and Environmental Policy | Year: 2016

Generous subsidies granted in recent years by EU to promote the green energy policy and also to counterbalance changes in agricultural policies of the new member states have resulted, among other things, in development of numerous heating plants that utilize agricultural residues. With no previous experience, farmers are offered ash in unprecedented amounts as a cheap source of nutrients. A robust technical and economic analysis of the ash and its interactions with topsoil was carried out in a commercial scale in the course of 4 vegetation seasons. It has been proved that high doses of ash worsen water management of topsoil, specifically its susceptibility to erosion. Based on the result, a new economically justified method has been proposed which allows utilization of nutrients contained in the ash without jeopardizing quality indicators of the topsoil. © 2016 Springer-Verlag Berlin Heidelberg


Vochozka M.,The Institute of Technology and Businesses in Ceske Budejovice | Marouskova A.,The Institute of Technology and Businesses in Ceske Budejovice | Vachal J.,The Institute of Technology and Businesses in Ceske Budejovice | Strakova J.,The Institute of Technology and Businesses in Ceske Budejovice
International Journal of Environmental Science and Technology | Year: 2016

A positive energy balance caused by accelerated production of CH4and additional financial benefits associated with shorter retention times, reduction in volumes, easier dewatering, enhanced hygiene, etc., are the reasons why most modern wastewater treatment plants are newly equipped with hydrothermal pretreatment units. This study examined how the changes in composition of the pretreated sewage sludge fermentation residues manifested themselves in subsequent processing by pyrolysis, both in terms of technology and financial impacts. It has been found that concentrations of heavy metals and other hazardous inhibitors might increase; however, the overall biotoxicity is lower due to their immobilization in the charred mass. Moreover, charring of the fermentation residues results in significant financial as well as technological benefits. © 2016, Islamic Azad University (IAU).

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