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    Tytuł:
    Charakterystyka mikroorganizmów biofilmów pochodzących z punktów czerpalnych wody do picia
    Characteristics of Biofilm Bacteria from Tapping Points of the Drinking Water Distribution System
    Autorzy:
    Biedroń, I.
    Traczewska, T. M.
    Płaza, G.
    Powiązania:
    https://bibliotekanauki.pl/articles/1818045.pdf
    Data publikacji:
    2016
    Wydawca:
    Politechnika Koszalińska. Wydawnictwo Uczelniane
    Tematy:
    antybiotykooporność
    identyfikacja
    adhezja
    biofilm
    sieć wodociągowa
    antibiotic resistance
    identification
    adhesion
    drinking water distribution system
    Opis:
    Microorganisms in the drinking water distribution system form a biofilm on the inner surfaces of the pipes. It is a life preserving strategy that provides easier access to nutrients and protects against harmful environmental factors. The biofilm is a habitat for numerous species of autochthonous microflora which contribute to the intensification of bio-corrosion and negatively affect the quality of the water supplied to the consumers. Additionally, the biofilm can consist of pathogenic species, which may pose an epidemiological hazard. Every drinking water distribution system has its own microflora, it is associated with the presence of autochthonous microorganisms that come from the raw water which despite treatment processes leaked to the network, and microbes that entered as a result of maintenance, failures and leakages. These factors contribute to the biofilm uniqueness in each water supply system, it is associated with the lack of reproducibility of the structure. In the present study characterized the microorganisms from biofilm of 17 tapping points of the water supply system for their ability to adhesion, resistance against selected antibiotics and rated their enzymatic activity. It is believed that the microorganisms with high surface affinity can play a decisive role in the early stages of biofilm formation.
    Źródło:
    Rocznik Ochrona Środowiska; 2016, Tom 18, cz. 2; 86-99
    1506-218X
    Pojawia się w:
    Rocznik Ochrona Środowiska
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Wpływ rodzaju materiału filtracyjnego na zmiany wartości wybranych wskaźników jakości wody podziemnej
    The influence of the type of filter material on change of the value of selected indicators of groundwater quality
    Autorzy:
    Biedroń, I.
    Świderska-Bróż, M.
    Traczewska, T. M.
    Trusz-Zdybek, A.
    Wolska, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/1818686.pdf
    Data publikacji:
    2013
    Wydawca:
    Politechnika Koszalińska. Wydawnictwo Uczelniane
    Tematy:
    materiał filtracyjny
    jakość wody podziemnej
    potable water
    trickling filter
    removal
    iron
    Opis:
    The effect of filter media on groundwater quality changes was studied for 6 months. The test system was continuously supplied with groundwater from well, at a constant speed from top to bottom and filter deposits were open to provide contact with air. Filter beds during the study period were not washed. The subject of the study were three beds (Z1, Z2 and Z3) with different filter materials: Z1, Z3 were filled only with an alkaline material, which provided to reduction the corrosivity of water, Z2 – outside alkalising materials also included sand, thus increasing removal efficiency of iron and phosphate ions. Analysis of water physico-chemical parameters include pH, temperature, total alkalinity, intensity of colour, turbidity, dissolved oxygen and the content of: iron, iron (II) and (III), aggressive carbon dioxide, inorganic nitrogen forms (Ninorg), ie NH4+, NO2-, NO3-, phosphate and total organic carbon. Bacteriological analysis of water samples was based on the total number of psychrophilic bacteria, having an optimum temperature for growth about 22ºC, and mesophilic (37ºC). All analyses were made in accordance with current standards. Groundwater was characterized by high volatility of most of the analyzed indicators of water quality. Due to the low flow velocity of water through the filtration beds and presence of dissolved oxygen in water, there was conditions for microbial growth in the deposits. There were a growth conditions for biofilm development on the surface of filter media. Excess filter media was periodically flushed out by flowing water regardless of the type of material which is contacted with water. Confirmation of the biofilm development on the surface of mineral grains was also indirectly by the increase in the number of bacteria in the filtrate, compared to the number of bacteria in the groundwater. Biological activity of the bacteria on the deposits surface was confirmed by changes in concentration of inorganic forms of nitrogen. All three beds have provided a reduction in inorganic nitrogen, which was assimilated by the microorganisms. Microorganisms on the surface of deposits reduced ammonia nitrogen in the filtrates by nitrification process. In addition, NH4+ particles may be adsorbed on the surface of particulate matter present in the water and retained in the bed. During this research there were no significant differences depending on the type of deposit, in efficiency of removal of inorganic nitrogen.
    Źródło:
    Rocznik Ochrona Środowiska; 2013, Tom 15, cz. 1; 845-862
    1506-218X
    Pojawia się w:
    Rocznik Ochrona Środowiska
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-2 z 2

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