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    Wyświetlanie 1-3 z 3
    Tytuł:
    The influence of hydraulic loading on biofilm properties in a subsurface wastewater infiltration system
    Autorzy:
    Zhang, L.
    Yang, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/205392.pdf
    Data publikacji:
    2016
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    subsurface wastewater infiltration system
    biofilms
    hydraulic loading
    spatial distribution
    biofilm properties
    Opis:
    In this study, a pilot-scale subsurface wastewater infiltration system (SWIS) was deployed to study landscape water treatment. The goal of the study was to investigate the effects of hydraulic loading on pollutant removal and the spatial distribution of biofilm properties in SWIS. Results showed that the efficiencies of chemical oxygen demand (COD), total nitrogen (TN) and total phosphorus (TP) removal degraded as hydraulic loading increased. Furthermore, quantities of the biofilm properties parameter s increased with the hydraulic loading. Polysaccharide and protein levels ranged from 560 to 1110 μg/g filler and 60 to 190 μg/g filler, respectively, at a hydraulic loading of 0.2 m/d. At a hydraulic loading of 0.4 m/d, the quantities of polysaccharide and protein ranged from 1200 to 3300 μg/g filler and 80 to 290 μg/g filler, respectively. Biofilm intensity and biofilm activity per unit weight decreased with the increase in hydraulic loading.
    Źródło:
    Archives of Environmental Protection; 2016, 42, 4; 70-79
    2083-4772
    2083-4810
    Pojawia się w:
    Archives of Environmental Protection
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Microbial communities and relationship with biofilm spatial distributions in subsurface wastewater infiltration systems
    Autorzy:
    Zhang, L.
    Yang, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/207883.pdf
    Data publikacji:
    2016
    Wydawca:
    Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
    Tematy:
    water treatment
    wastewater infiltration system
    DGGE
    volatile suspended solids
    oczyszczanie ścieków oczyszczanie wody
    systemy infiltracji ścieków
    lotne zawiesiny
    Opis:
    A pilot-scale subsurface wastewater infiltration system (SWIS) was designed for the treatment of polluted river water. The components of microbial communities have been identified and characterized and their dependences on some indicators of biofilm formation in the SWIS have been determined. The average efficiencies of COD, TN and removal were 43.3%, 28.8% and 79.6%, respectively. According to the denaturing gradient gel electrophoresis (DGGE) profile, high intensity and uniform bands were generated, indicating an abundant microbial community in each layer of the SWIS. Furthermore, the Shannon index analysis showed high correlation to the spatial distribution of microbial communities as well as the quantity of biofilm in each sample, which were characterized by measuring volatile suspended solids (VSS), phospholipids, proteins and polysaccharides. Sequencing of partial 16S rRNA gene fragments revealed that the composition of the total bacterial communities was dominated by Alphaproteobacteria, Gammaproteobacteria, Deltaproteobacteria, Pseudomonas, Bacillus, Flavobacteriaceae, TM-7, and other uncultured bacteria. These bacteria may contribute to nutrient removal in SWIS. +4 NH –N
    Źródło:
    Environment Protection Engineering; 2016, 42, 3; 55-69
    0324-8828
    Pojawia się w:
    Environment Protection Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The efficiency of filtration materials (Polonite® and Leca®) supporting phosphorus removal in on site treatment systems with wastewater infiltration
    Autorzy:
    Karczmarczyk, A.
    Woja, K.
    Bliska, P.
    Baryła, A.
    Bus, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/101107.pdf
    Data publikacji:
    2017
    Wydawca:
    Polska Akademia Nauk. Stowarzyszenie Infrastruktura i Ekologia Terenów Wiejskich PAN
    Tematy:
    phosphorus
    reactive material
    on site wastewater treatment
    infiltration system
    Opis:
    The most of the on site wastewater treatment systems in Poland discharges treated effluent to the soil. The goal of phosphorus (P) reduction from dispersed sources of pollution can be achieved by application of P reactive materials in the construction of wastewater infiltration systems. Two P reactive materials were tested in this study: Polonite® in grains of 2÷6 mm and lightweight aggregate Leca® in grains of 4÷10 mm. Apparent P sorption capacity was assesed on 40.9 mg·g-1 (Polonite®) and 5.1 mg·g-1 (Leca®). Both materials sorbed P-PO4 very fast, after 15 min over 90% of P was removed from solution and wastwater. Wastewater used in this study came from the outlet from the septic tank of on site septic system. P-PO4 solution was prepared from KH2 PO4 and the tap water. In the small column experiment, four collumns (2 filled with Polonite® and 2 filled with Leca®) were fed with wastewater and P-PO4 solution in hydraulic loadings of 30÷40 dm3 ·m-2·d-1. All the columns removed significant amounts of P from both solution and wastewater with the reduction between 28.3% and 72.5%. The mean P-PO4 effluent concentrations ranged from 1.21 mg·dm-3 to 7.12 mg·dm-3. The best overall performance was achieved by the Polonite® fed with solution. Both tested materials can support wastewater treatment in on site systems.
    Źródło:
    Infrastruktura i Ekologia Terenów Wiejskich; 2017, IV/1; 1401-1413
    1732-5587
    Pojawia się w:
    Infrastruktura i Ekologia Terenów Wiejskich
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-3 z 3

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