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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. Source


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. Source


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. Source


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. Source


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. Source

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