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    Wyświetlanie 1-4 z 4
    Tytuł:
    Effective use of construction and demolition waste and stone dust in construction for the production of manufactured aggregates in two pilot regions of the Czech Republic
    Autorzy:
    Vachuska, Vaclav
    Vachuska, Jan
    Volosinova, Dagmar
    Vachuska, Ales
    Powiązania:
    https://bibliotekanauki.pl/articles/2086911.pdf
    Data publikacji:
    2022
    Wydawca:
    Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
    Tematy:
    construction waste
    stone dust
    mineral dust
    demolition waste
    waste recovery
    odpady budowlane
    pył kamienny
    pył mineralny
    odpady rozbiórkowe
    odzysk odpadów
    Opis:
    The authors present a unique possibility of utilizing hitherto unused and difficult-to-store types of waste such as dust generated during the extraction and treatment of a natural stone, and still difficult to recycle part of construction and demolition waste ??? residual mineral inert material. Stone dust mixed with residual mineral inert material, water, and binders in various proportions formed five types of mixtures which were transformed into manufactured aggregates using hyper-pressing. The properties of these manufactured aggregates ??? resistance to crushing and bulk density ??? presented on laboratory--basedsamples were similar to those of natural aggregates. The production of manufactured aggregates, the processing of unused types of construction and demolition waste, together with stone dust, fully comply with the rules of circular economics. The availability of stone dust has been checked based on data obtained by personally interviewing the authors in the quarries of the pilot regions of South Bohemia and Pilsen. Data on the amount of construction and demolition waste produced were obtained from the publicly available database of produced construction and demolition waste ??? Waste Management Information System (ISOH).
    Źródło:
    Environment Protection Engineering; 2022, 48, 2; 87--95
    0324-8828
    Pojawia się w:
    Environment Protection Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Significant waste properties in terms of applicability in the power industry
    Autorzy:
    Nowak, Martyna
    Stelmach, Sławomir
    Sajdak, Marcin
    Powiązania:
    https://bibliotekanauki.pl/articles/207401.pdf
    Data publikacji:
    2019
    Wydawca:
    Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
    Tematy:
    RDF fuel
    fuel from waste
    waste heat recovery
    paliwo RDF
    paliwo z odpadów
    odzysk energii odpadowej
    Opis:
    The aim of the article is to present the physical and chemical properties of the refuse derived fuel (RDF) substrates, which have a significant impact on the energy recovery process in power plants. The experimental part includes technical (moisture and ash content, net and gross calorific values) and elemental analyses (sulfur, chlorine and mercury content), biomass and non-biomass concentration in the samples. In order to carry out the analysis of reactor slagging and fouling risk, chemical composition of the ash and characteristic ash fusion temperatures were determined. The waste samples are heterogeneous material and their properties are diversified – the moisture content ranges from 1.8 to 29.2 wt. %, the net calorific value from 17.231 to 28.307 MJ/kg, the ash content in the samples from 7.7 to 31.2 wt. %. The S content is in the range from 0.04 to 0.58 wt. %, the Cl content from 0.58 to 2.11 wt. % and the Hg content in the samples from 0.09 to 0.20 mg/kg. It can be observed, that the tested waste is a demanding fuel, because of its unfavorable fouling and slagging properties, which are directly related to the content of oxides with the basic properties.
    Źródło:
    Environment Protection Engineering; 2019, 45, 4; 75-85
    0324-8828
    Pojawia się w:
    Environment Protection Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Potato waste treatment by microbial fuel cell. Evaluation based on electricity generation, organic matter removal and microbial structure
    Autorzy:
    Du, H.
    Li, F.
    Huang, K.
    Li, W.
    Feng, C.
    Powiązania:
    https://bibliotekanauki.pl/articles/206898.pdf
    Data publikacji:
    2017
    Wydawca:
    Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
    Tematy:
    water treatment
    performance
    technology
    bacterial
    recovery
    sludge
    carbon
    microbial fuel cell
    COD
    potato waste
    uzdatnianie wody
    ChZT
    węgiel
    odpady ziemniaczane
    Opis:
    The performance of microbial fuel cell (MFC) in treating potato waste was evaluated using a two-chamber MFC supplied with potato liquid after mastication of market available fresh potato. Evaluation was conducted based on electricity generation, organic matter removal (CODCr, DOC and volatile fatty acids (VFAs)), and microbial structure on the anode and in the anodic solution of the reactor. Current density exhibited a trend that followed the concentration changes of organic matter in the solution, with its highest value being observed as 208 mA/m2. Effective removal of organic matter was also observed. By the end of the experiment, the removal for total COD reached about 84%. Bacterial structure analysis based on PCR, DGGE and sequencing indicated that more species were developed in the anodic solution than on the anode, with Proteobacteria, Firmicutes and Bacteroides being dominant. Geobacter, a well reported exoelectrogenic species, was found more predominant on the anode than in the anodic solution. The results thus indicated that simultaneous stabilization and electricity generation could be achieved when potato waste is treated in MFC.
    Źródło:
    Environment Protection Engineering; 2017, 43, 1; 5-18
    0324-8828
    Pojawia się w:
    Environment Protection Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Extraction of metals from electronic waste by bacterial leaching
    Autorzy:
    Willner, J.
    Fornalczyk, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/208166.pdf
    Data publikacji:
    2013
    Wydawca:
    Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
    Tematy:
    metal recovery
    bioleaching
    electronic scrap
    electronic waste
    Acidithiobacillus ferrooxidans
    bacterial leaching
    biohydrometallurgy
    recovering metals
    odzysk metali
    bioługowanie
    ługowanie bakteryjne
    biohydrometalurgia
    odzyskiwanie metali
    złom elektroniczny
    odpady elektroniczne
    Opis:
    Electronic waste is usually processed by means of classical methods, i.e. in pyro- and hydro-metallurgical processes. However, new solutions for more economically and ecologically efficient recovery of metals are constantly being searched for. Biohydrometallurgy can become a promising technology of recovering metals from industrial waste. Bioleaching - one of the methods applied in that technology - is the subject of particular interest of many scientific centres. The paper presents the results of laboratory tests of bacterial leaching of metals from electronic scrap. It describes the mechanisms of this process and the factors influencing the chemical reaction. The paper also presents preliminary results of experimental studies on the copper bioleaching from electronic waste with the participation of Acidithiobacillus ferrooxidans bacteria.
    Źródło:
    Environment Protection Engineering; 2013, 39, 1; 197-208
    0324-8828
    Pojawia się w:
    Environment Protection Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-4 z 4

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