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    Tytuł:
    Denitrifcation rate in the mainstream deammonification
    Autorzy:
    Wilińska, Anna
    Czerwionka, Krzysztof
    Powiązania:
    https://bibliotekanauki.pl/articles/1065254.pdf
    Data publikacji:
    2019
    Wydawca:
    Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
    Tematy:
    Anammox
    NUR
    conventional denitrification rate tests
    deammonification
    denitrifcation
    Opis:
    The conventional processes of biological nitrogen removal based on nitrification and denitrification does not fit properly into the concept of the circular economy. As the alternative one should consider the deammonification process, which is a combination of partial nitrification (nitritation) and Anammox processes. It consists of removing ammonium nitrogen from wastewater under anaerobic conditions by a group of autotrophic microorganisms. The result is a significant reduction in oxygen demand, while there is no a need for organic compounds that can be converted into biogas in digesters. The deammonification process can be successfully used to treat leachate from the sludge management of WWTP. Currently, research works focus on the use of this process for wastewater treatment in the mainstream of WWTP. This type of research, on a pilot scale, was also carried out at Gdańsk WWTPs. The aim of the presented research was the analysis of the possibility of a simultaneous removal of nitrates, generated during the mentioned deammonification process. The dissolved organic compounds present in the mechanically and chemically treated wastewater can be used in the denitrification process. The efficiency of the process has been determined by performing conventional denitrification rate tests (NUR). The average values of NUR 1 (2.75 mg NOx / gvss ∙ h) and NUR 2 (1.05 NOx / gvss ∙ h) were close to the values typical for mechanically treated municipal sewage. It has been shown that the denitrification process can cause an increase of total nitrogen removal efficiency in the process of deammonification of municipal wastewater. The amount of available organic compounds was sufficient to carry out the denitrification process of nitrates produced during the deammonification process.
    Źródło:
    World Scientific News; 2019, 135; 71-84
    2392-2192
    Pojawia się w:
    World Scientific News
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Possibilities of Leachate Co-Treatment Originating from Biogas Production in the Deammonification Process
    Autorzy:
    Majtacz, Joanna
    Grubba, Dominika
    Kowal, Przemysław
    Czerwionka, Krzysztof
    Powiązania:
    https://bibliotekanauki.pl/articles/125402.pdf
    Data publikacji:
    2020
    Wydawca:
    Polskie Towarzystwo Inżynierii Ekologicznej
    Tematy:
    leachate
    biogas production
    deammonification
    co-fermentation
    Opis:
    In the methane fermentation process, sewage sludge is the single substrate or serves as a co-substrate with the addition of various waste products. After the treatment stable digestate is obtained, which consists of two phases solid and liquid. Liquid phase, called as a leachate, due to the high content of nutrients must be treated before they are discharged into the final receiver. Physical and chemical methods of leachate treatment are usually expensive and difficult to maintain. Application of biological methods seems to be promising in such applications, however number of papers focused on such issue is limited. The aim of the presented study was to determine the treatment possibility of leachate generated during co-fermentation of agricultural products (bovine slurry) and excessive activated sludge in the deammonification process. During the experiment dewatered digestate from the mesophilic co-fermentation of bovine slurry and excessive active sludge, were co-treated with synthetic wastewater in a 1:3 weight ratio in the sequencing bath reactor. In the final test period, the Superfloc C494VP polyelectrolyte (from Kemira) was dosed into the leachate in order to enhance solids removal. AUR, NPR and AA were calculated to evaluate the deammonification process. It turns out that it is possible to co-treat leachate from biogas plants in C/N ratio no more than 1. The test also noted that a better oxidation effect of NH4 N was noted by adding polyelectrolyte to leachate. On the other hand, this negatively affected the viscosity of the granules and their sticking.
    Źródło:
    Journal of Ecological Engineering; 2020, 21, 1; 14-19
    2299-8993
    Pojawia się w:
    Journal of Ecological Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
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