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    Wyświetlanie 1-4 z 4
    Tytuł:
    Dewatering of conditioned sludge in small wastewater treatment plants
    Autorzy:
    Wolny, L.
    Powiązania:
    https://bibliotekanauki.pl/articles/207409.pdf
    Data publikacji:
    2015
    Wydawca:
    Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
    Tematy:
    wastewater treatment
    dewatering
    filtration
    polyelectrolytes
    sewage sludge
    sewage treatment
    sewage treatment plants
    water treatment plants
    municipal wastewater treatment plants
    wastewater treatment plants
    oczyszczanie ścieków
    odwadnianie
    filtrowanie
    polielektrolity
    osady ściekowe
    oczyszczalnie ścieków komunalnych
    oczyszczalnie ścieków
    Opis:
    Parameters characterizing the dewatering process of sewage sludge in small wastewater treatment plants (WWTPs) have been analyzed. Two municipal wastewater treatment plants of comparable capacity and similar technology of sewage treatment were selected to the analysis. Comparison of dewaterability of unprepared and conditioned sludge was made. During preliminary tests, the capillary suction time (CST) of sludge conditioned with cationic polyelectrolyte was determined. Next, for the optimal doses of selected polyelectrolyte, more detailed technological experiments were conducted such as vacuum filtration and susceptibility to the gravitational thickening. Tested sludge had very low susceptibility to thickening. The final volume of unprepared tested samples after 2 hour thickening was 977.0 cm3, while the initial volume of thickened sludge was 1000 cm3.The lowest value of final hydration for conditioned sludge was 64.0%.
    Źródło:
    Environment Protection Engineering; 2015, 41, 2; 99-105
    0324-8828
    Pojawia się w:
    Environment Protection Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    General characteristics of the quantity and quality of sewage sludge from selected wastewater treatment plants in the Świętokrzyskie Province
    Autorzy:
    Gawdzik, J.
    Długosz, J.
    Urbaniak, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/207262.pdf
    Data publikacji:
    2015
    Wydawca:
    Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
    Tematy:
    wastewater treatment
    heavy metals
    sewage pumping plants
    sewage sludge
    sewage treatment plants
    toxicity
    water treatment plants
    total nitrogen
    total phosphorous
    total phosphorus
    oczyszczanie ścieków
    metale ciężkie
    pompownia ścieków
    osady ściekowe
    oczyszczalnie ścieków
    toksyczność
    stałe substancje organiczne
    azot całkowity
    fosfor całkowity
    Opis:
    Five wastewater treatment plants from the Świętokrzyskie Province have been briefly described, and a general analysis of the composition and quantity of sewage sludge from the data objects has been conducted. The paper also presents various ways of management of sewage sludge. The authors analyzed sediments from the wastewater treatment plant for PE in the range of 15 000–99 999 located in Ostrowiec, Opatów, Starachowice, Skarżysko-Kamienna, and in Sandomierz. The sludge was characterized in terms of its quantity and quality, the content of heavy metals, total nitrogen, total phosphorous, and organic solids.
    Źródło:
    Environment Protection Engineering; 2015, 41, 2; 107-117
    0324-8828
    Pojawia się w:
    Environment Protection Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Energy and sustainability of operation of a wastewater treatment plant
    Autorzy:
    Bodík, I.
    Kubaská, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/208254.pdf
    Data publikacji:
    2013
    Wydawca:
    Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
    Tematy:
    wastewater treatment
    biogas
    energy utilization
    sewage pumping plant
    sludge digestion
    toxicity
    water treatment plants
    anaerobic sludge digestion
    energy consumption
    wastewater treatment plants
    oczyszczanie ścieków
    biogaz
    wykorzystanie energii
    przepompownie ścieków
    fermentacja osadów
    toksyczność
    stacje uzdatniania wody
    fermentacja beztlenowa osadów
    zużycie energii
    oczyszczalnie ścieków
    Opis:
    The study summarises the energy consumption data obtained from the Slovak wastewater treatment plants. Overall, 51 large WWTPs using mesophilic anaerobic sludge digestion and biogas utilisation (the total capacity of 2.5 mil. p.e.) and 17 small rural WWTPs (the total capacity 15 000 p.e.) were compared in many technological and energy parameters. The average energy consumption in large WWTPs in Slovakia is 0.485 kWh/m3 and 0.915 kWh/m3 in small rural plants. The average energy demand related to BOD5 load represents the value of 2.27 kWh/kg BOD5, in Slovak plants. The specific energy production is relatively low - in average 1.2 kWh el /m3 of produced biogas and 0.1 kWh el /m 3 of treated wastewater, respectively. The average energy autarky in Slovak plants is 25.2%. Some plants have high energy autarky (>65%), despite no external biowastes being dosed to these during operation.
    Źródło:
    Environment Protection Engineering; 2013, 39, 2; 15-24
    0324-8828
    Pojawia się w:
    Environment Protection Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Treatment of wastewater to meet the requirements for cooling water systems in jordan’s nuclear plants
    Autorzy:
    Al-Rawajfeh, A.E.
    Araj, K.
    Powiązania:
    https://bibliotekanauki.pl/articles/184961.pdf
    Data publikacji:
    2013
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    cooling water
    nuclear plants
    wastewater treatment
    scale deposition
    schładzanie wody
    elektrownia jądrowa
    oczyszczanie ścieków
    Opis:
    Scaling and corrosion associated with the use of natural hard water in cooling towers during recirculation pose great problems from both economical and technical points of view, such as decreased system efficiency and increased frequency of chemical cleaning. Treated municipal wastewater (MWW) is a promising alternative to freshwater as power plant cooling system makeup water, especially in arid regions. In this work, hybrid systems of salt precipitation (SP), nanofiltration (NF) and reverse osmosis (RO) were investigated, as potential pretreatment processes for wastewater reuse as cooling water in the planned Jordan nuclear power plants. The As-Samra wastewater was used to calculate the potential of carbonate and sulfate scale formation. The results were compared to scale potentials from Palo Verde wastewater. Four cases were investigated; SP, NF, SP-RO and NF-RO. The SP pretreatment cases showed the highest monovalent to divalent ratio because of a high removal of Ca and Mg and addition of Na from the chemicals of the SP step. The NF pretreatment cases, showed the lowest calcium sulfate scale potential and this potential decreases with the % pretreatment. The scale amount increases very slightly with concentration times when the SP and NF product is desalinated by RO step.
    Źródło:
    Chemical and Process Engineering; 2013, 34, 2; 253-267
    0208-6425
    2300-1925
    Pojawia się w:
    Chemical and Process Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-4 z 4

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