Comprehensive investigation of the effect of polluting substances upon active sludge and of the opportunities for immobilisation of ferment preparations in the process of biological aerobic treatment of sewage. Refined mathematical models describing the population dynamics and identification of degradation rations based on the results of experimental investigations. The models obtained describe both the active sludge dynamics and the substrate biodegradation reasonably accurately, therefore, they can be applied to computations of sewage treatment in practice.

Comprehensive investigation of the effect of polluting substances upon active sludge and of the opportunities for immobilisation of ferment preparations in the process of biological aerobic treatment of sewage. Refined mathematical models describing the population dynamics and identification of degradation rations based on the results of experimental investigations. The models obtained describe both the active sludge dynamics and the substrate biodegradation reasonably accurately, therefore, they can be applied to computations of sewage treatment in practice.

Magistriniame darbe nagrinėjama rekonstruotos Jurbarko nuotekų valyklos efektyvumas. Tyrimo tikslas – nustatyti nuotekų valyklos darbo efektyvumą po aeracinės sistemos rekonstrukcijos. Tyrimo objektas – Jurbarko nuotekų valyklos iškeliama aeracinė sistema, kuri buvo sumontuota 2008 m. Šiems tikslams pasiekti buvo išsikelti šie uždaviniai: teoriškai apibūdinti biologinio valymo įrenginius, įtakojančius biologinio valymo proceso efektyvumą ir įvertinti veikliojo dumblo sistemos pokyčius; nustatyti nuotekų išvalymo efektyvumą Jurbarko nuotekų valykloje; atlikti palyginamąją analizę vamzdinės ir diskinės aeracinės sistemos; nustatyti Jurbarko nuotekų valyklos elektros energijos sąnaudas. Nuotekų valyklos efektyvumas tirtas, pagal BDS7, bendrojo azoto (Nb), bendrojo fosforo (Pb) pasišalinimą iš vandens prieš aeracinės sistemos pakeitimą ir po aeracinės sistemos pakeitimo. Atlikus tyrimus nustatyta, kad nuotekų valykla po rekonstrukcijos dirba patikimai. Nuotekų liekamoji tarša neviršija DLK. BDS7 valytame vandenyje sumažėjo 16 %, bendrojo azoto (Nb) – 27 %, o bendrojo fosforo (Pb) – 56 %, lyginant su BDS7, Nb ir Pb prieš aeracinės sistemos pakeitimą. Cheminio reagento proceso veiksmui sunaudojama 488,8 kg/m, mažiau, o tuo pačiu sudaro 22295,2 Lt/m. mažiau išlaidų. Elektros energijos sąnaudos sumažėjo apie 14%. / The paper examined the reconstructed Jurbarkas domestic wastewater treatment plants performance. Purpose of the survey - the wastewater treatment plant efficiency of aeration system reconstruction. The object of research - Jurbarkas domestic wastewater treatment plants enters an aeration system that was installed in 2008. To achieve these goals has been to move the following tasks: a theoretical description of the biological treatment plant, which affect the biological treatment process and evaluate the effectiveness of the active sludge system changes, the efficiency of wastewater remediation Jurbarkas wastewater treatment facilities, to carry out a comparative analysis of linear and circular aeration system, the sewage treatment plant Jurbarkas electricity costs. Sewage treatment plant efficiency has been studied by BOC7 nitrogen (Nb), phosphorus (Pb) elimination of the water before aeration system replacement and the replacement of aeration systems. The investigation showed that sewage treatment facilities after renovation work reliably. Effluent residual contamination does not exceed the MRL. BOC7 treated water decreased by 16%, total nitrogen (Nb) - 27%, and total phosphorus (Pb) - 56%, compared with BOC7, Nb and Pb before aeration system replacement. Chemical reagent process steps used 488.8 kg/m and less, while at the same time is 22295.2 Lt/m. less cost. Electricity costs have fallen about 14 percent.