Szukana fraza: [Abstract = "In the polishing pond in the summer period, content of total nitrogen in treated sewages was further decreased by nearly 50%. In the winter period, the polishing pond fulfilled mainly retention role and thus did not improve effectiveness of the whole system. Temperature coefficients, calculated on the basis of single first\-order kinetics, for nitrification process in the filter bed \(N\-NH4\+\) and denitrification process in the polishing pond \(N\-NO3\-\) amounted to 1.039 and 1.089, respectively."]

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