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    Wyświetlanie 1-7 z 7
    Tytuł:
    Environmental aspects of feed phosphates production
    Autorzy:
    Hoffmann, J.
    Hoffmann, K.
    Borowiec, M.
    Huculak, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/779230.pdf
    Data publikacji:
    2009
    Wydawca:
    Zachodniopomorski Uniwersytet Technologiczny w Szczecinie. Wydawnictwo Uczelniane ZUT w Szczecinie
    Tematy:
    fosforany paszowe
    fluor
    metale ciężkie
    feed phosphates
    fluorine
    heavy metals
    Opis:
    The risks resulting from the selected feed phosphates application in animal nutrition were analyzed. The results of the analyses of the fodder phosphates obtained in laboratory conditions were presented, including the toxic and disadvantageous substances with regard to their impact upon the environment.
    Źródło:
    Polish Journal of Chemical Technology; 2009, 11, 1; 16-19
    1509-8117
    1899-4741
    Pojawia się w:
    Polish Journal of Chemical Technology
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Biodegradation of selected substances used in liquid fertilizers as an element of Life Cycle Assessment
    Autorzy:
    Borowiec, M.
    Huculak, M.
    Hoffmann, K.
    Hoffmann, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/779350.pdf
    Data publikacji:
    2009
    Wydawca:
    Zachodniopomorski Uniwersytet Technologiczny w Szczecinie. Wydawnictwo Uczelniane ZUT w Szczecinie
    Tematy:
    ocena cyklu życia
    związki chelatujące
    biodegradacja
    life cycle assessment (LCA)
    chelating compounds
    biodegradation
    Opis:
    The results of laboratory investigations into the aerobic biodegradation of chelating compounds in water medium under static test conditions are presented. It was found that nitrilotriacetic acid (NTA) and glutamic acid diacetic acid (GLDA) are more readily biodegradable than ethylenediaminetetraacetic acid (EDTA) commonly used in the production of liquid fertilizers. Biodegradation was evaluated on the basis of compound decay and changes in COD.
    Źródło:
    Polish Journal of Chemical Technology; 2009, 11, 1; 1-3
    1509-8117
    1899-4741
    Pojawia się w:
    Polish Journal of Chemical Technology
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Utilization of poultry droppings in mineral-organic fertilizers
    Autorzy:
    Hoffmann, K.
    Lewandowska, B.
    Borowiec, M.
    Hoffmann, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/777979.pdf
    Data publikacji:
    2007
    Wydawca:
    Zachodniopomorski Uniwersytet Technologiczny w Szczecinie. Wydawnictwo Uczelniane ZUT w Szczecinie
    Tematy:
    odchody drobiowe
    pomiot drobiowy
    nawozy mineralno-organiczne
    composted turkey droppings
    mineral-organic fertilizers
    Opis:
    The results of physicochemical analyses of raw and composted turkey droppings and those of germination tests carried out using the droppings are presented. On the basis of the results formulas for microelement mineral-organic fertilizers have been developed and fertilizer rates have been determined for winter wheat.
    Źródło:
    Polish Journal of Chemical Technology; 2007, 9, 3; 12-14
    1509-8117
    1899-4741
    Pojawia się w:
    Polish Journal of Chemical Technology
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Investigation of applying calcium oxide for the removal of bitter substances from hop wastes
    Autorzy:
    Hoffmann, K.
    Hoffmann, J.
    Huculak-Mączka, M.
    Skut, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/779299.pdf
    Data publikacji:
    2011
    Wydawca:
    Zachodniopomorski Uniwersytet Technologiczny w Szczecinie. Wydawnictwo Uczelniane ZUT w Szczecinie
    Tematy:
    wychmieliny
    kwasy gorzkie
    tlenek wapnia
    hop wastes
    bitter acids
    calcium oxide
    Opis:
    Utilization of brewery wastes is one of the solutions for the production of the fodder supplements containing biogenic nutrients. The condition of such application is to meet the requirements included in the regulations regarding animal feeding, particularly removing a bitter taste. The aim of the performed investigations was the removal of bitter acids from the post-extraction hop waste using the calcium oxide addition. For the examination hop wastes obtained as a by-product from the CO2 plant extraction in supercritical conditions, were applied. Physicochemical properties of the waste samples collected for the investigations were determined by applying the available standard analytical techniques. The analyses of the determination of bitter acids were carried out by the high performance liquid chromatography method. During the experiments very good effects of bitter acids removal from hop wastes, were obtained by using CaO suspensions in water. The investigations on the influence of the CaO concentration in suspension on the efficiency of bitter acids removal indicate the possibility of applying suspensions by 2 wt% for this purpose.
    Źródło:
    Polish Journal of Chemical Technology; 2011, 13, 1; 35-40
    1509-8117
    1899-4741
    Pojawia się w:
    Polish Journal of Chemical Technology
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The utilization possibility of waste lignite as a raw material in the process of obtaining humic acids preparations
    Autorzy:
    Hoffmann, K.
    Huculak-Mączka, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/778997.pdf
    Data publikacji:
    2012
    Wydawca:
    Zachodniopomorski Uniwersytet Technologiczny w Szczecinie. Wydawnictwo Uczelniane ZUT w Szczecinie
    Tematy:
    brown coals
    humic acids
    extraction
    alkaline waste
    Opis:
    In the light of environmental law utilization lignite waste in non-energy sectors of the economy is a national way to manage them. Lignite due to the lower degree of coalifi cation and calorifi c value as well as a high content of humic substances becomes a valuable component of fertilizer. The paper presents the possibility of using lignite waste as a raw material in the process of obtaining humic acids with 0.1 M NaOH. The idea of the process combines production, environmental and economic purposes. After the extraction process of humic acids and considering the possibility of using waste formed during the process, were carried out a number of studies to assist in choosing the best solution to its management.
    Źródło:
    Polish Journal of Chemical Technology; 2012, 14, 4; 1-6
    1509-8117
    1899-4741
    Pojawia się w:
    Polish Journal of Chemical Technology
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The impact of dry mass content in pig liquid manure on its treatment with a filtration method
    Autorzy:
    Kowalski, Z.
    Makara, A.
    Marszałek, M.
    Hoffmann, J.
    Hoffmann, K
    Powiązania:
    https://bibliotekanauki.pl/articles/778774.pdf
    Data publikacji:
    2014
    Wydawca:
    Zachodniopomorski Uniwersytet Technologiczny w Szczecinie. Wydawnictwo Uczelniane ZUT w Szczecinie
    Tematy:
    pig manure treatment
    filtration method
    dry mass
    filtrate
    Opis:
    The present study examines the impacts of dry mass content in pig liquid manure on its treatment with a filtration method. Samples of liquid manure with variable dry mass content were subjected to treatment using phosphoric acid, sulfuric acid, lime milk and superphosphate, as well as to thermal treatment, while in the last phase of pressure filtration. Increased dilution of the manure resulted in a reduced raw materials consumption ratio and improved filtration process efficiency, which ranged from 408 to 3765 kg/m2/h. The highest filtration efficiency was achieved using manure containing 3% dry mass, while the lowest efficiency was observed in manure at 10% dry mass. The increase in liquid manure dilution also reduced chemical oxygen demand in the filtrate, which ranged from 15 062 to 3656 mg/l. An appropriate manure dilution level, under the constant parameters of the treatment process, reduced phosphorus content in the filtrate to < 10 mg/kg Chile simultaneously enriching the post-filtration sediment with this precious fertilizing component.
    Źródło:
    Polish Journal of Chemical Technology; 2014, 16, 3; 106-110
    1509-8117
    1899-4741
    Pojawia się w:
    Polish Journal of Chemical Technology
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Biodegradability of the compounds introduced with microelement fertilizers into the environment
    Autorzy:
    Borowiec, M.
    Polańska, P.
    Hoffmann, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/777937.pdf
    Data publikacji:
    2007
    Wydawca:
    Zachodniopomorski Uniwersytet Technologiczny w Szczecinie. Wydawnictwo Uczelniane ZUT w Szczecinie
    Tematy:
    biodegradacja
    nawozy mikroelementowe
    EDTA
    S,S-EDDS
    MGDA
    biodegradation
    microelement fertilizers
    Opis:
    The results of laboratory studies into the oxygen biodegradation of chelating substances in aqueous medium under kinetic and static test conditions with added glucose as an additional source of carbon, are presented. It has been found that S,S-ethylenediaminedisuccinic acid (S.S-EDDS) and methylglycinediacetic acid (MGDA) are more readily degradable than ethylenediaminetetraacetic acid (EDTA), most commonly used in the production of microelement fertilizers. It has also been found that the presence of additional carbon sources accelerates biodegradation.
    Źródło:
    Polish Journal of Chemical Technology; 2007, 9, 3; 38-41
    1509-8117
    1899-4741
    Pojawia się w:
    Polish Journal of Chemical Technology
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-7 z 7

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