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    Wyświetlanie 1-3 z 3
    Tytuł:
    Selection of bulking agents for composting of sewage sludge
    Autorzy:
    Malińska, K.
    Zabochnicka-Świątek, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/206989.pdf
    Data publikacji:
    2013
    Wydawca:
    Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
    Tematy:
    sewage sludge
    bulking agents
    composting
    osady ściekowe
    substancje wypełniające
    kompostowanie
    Opis:
    The scope of this work covered: laboratory determination of bulk density, air-filled porosity, mechanical strength, water holding capacity of bulking agents, i.e. straw, woodchips and sawdust, and composting mixtures of sewage sludge and selected bulking agents at the ratios of 1:0.3; 1:0.6; 1:1 (d.b.), as well as simulation of bulk density and air-filled porosity in function of composting pile depth for the composting mixtures. Simulation of changes in bulk density and air-filled porosity was performed for a 2 m high composting pile. The results showed that mixing sewage sludge with woodchips in the ratio of 1:1 (d.b.) allows optimal moisture content, C/N ratio and air-filled porosity across the composting pile.
    Źródło:
    Environment Protection Engineering; 2013, 39, 2; 91-103
    0324-8828
    Pojawia się w:
    Environment Protection Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Removal of biogens from synthetic wastewater by microalgae
    Autorzy:
    Zabochnicka-Świątek, M.
    Malińska, K.
    Krzywonos, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/206894.pdf
    Data publikacji:
    2014
    Wydawca:
    Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
    Tematy:
    algae
    microorganisms
    phosphorus removal
    nitrogen removal
    synthetic wastewater
    Chlorella vulgaris
    biogens
    glony
    mikroorganizmy
    usuwanie azotu
    usuwanie fosforu
    ścieki syntetyczne
    biogeny
    Opis:
    Removal of biogens (P, N) from synthetic wastewater by microalgae Chlorella vulgaris was investigated. The study was carried out under static conditions (batch tests). Significant differences were found in the removal of nutrients by algae. The removal of biogens was >50% for ammonium ions and >80% for nitrates and phosphates. N and P removal through assimilation by microalgal C. vulgaris species can be considered an ecological alternative for current methods applied for removal of these substances from wastewater. It seems that using algae for N and P removal from wastewater can be affordable in comparison to other methods. The efficiency of biogens removal depends on the type of a biogen to be removed and the concentration of N and P in solutions. Optimization of N:P ratio can have some positive influence on the removal of biogens from wastewater by C. vulgaris.
    Źródło:
    Environment Protection Engineering; 2014, 40, 2; 87-104
    0324-8828
    Pojawia się w:
    Environment Protection Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The assessment of the applicability of shear wave elastography in modelling of the mechanical parameters of the liver
    Autorzy:
    Żmudzińska, M.
    Inglot, M.
    Zaleska-Dorobisz, U.
    Jankowski, L.
    Świątek-Najwer, E.
    Powiązania:
    https://bibliotekanauki.pl/articles/306904.pdf
    Data publikacji:
    2018
    Wydawca:
    Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
    Tematy:
    elastografia
    identacja
    moduł Younga
    shear wave elastography
    indentation
    Young’s modulus
    porcine liver
    Opis:
    The development of haptic technology in laparoscopic simulations indicates a demand of constant upgrade of tactile feedback, which is currently considered to be unsatisfactory. Presumably, one of its causes may be insufficiently examined and described mechanical parameters of soft tissues in vivo, including liver tissue. The aim of the following work was the attempt at assessing the applicability of data from shear wave elastography in organ modelling by correlating the mechanical parameters of the liver obtained by this noninvasive method, with the mechanical parameters obtained by indentation. Methods: Each one out of 12 porcine livers, was subjected to elastography and subsequently to the indentation test. The mean Young’s modulus for each liver lobe was obtained using elastography, while in indentation Young’s moduli in three different strain ranges and maximum load were calculated. Results: Differences between mechanical parameters of lobes were not found but the parameters were calculated for different methods and strain ranges. Conclusions: The limitations of both methods prevent the unambiguous assessment of the applicability of elastography in liver modelling for laparoscopic simulations, at the presented stage of research. Nevertheless, the presented study provides a valuable introduction to the development of a methodology for testing the mechanical parameters of liver tissue.
    Źródło:
    Acta of Bioengineering and Biomechanics; 2018, 20, 4; 59-64
    1509-409X
    2450-6303
    Pojawia się w:
    Acta of Bioengineering and Biomechanics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-3 z 3

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