There are many known wastewater treatment technologies. One of these is sequencing batch reactor technology or SBR. Centralna čistilna naprava Domžale-Kamnik uses SBR technology for their aerobic biological stage. There are many known program tools for modelling and dimensioning of wastewater treatment plants. The program tool Aqua Designer, which allows the dimensioning of sequencing batch reactors, was used in this dissertation. The purpose of this dissertation is the evaluation of the program tool Aqua Designer and suggestions for improvements of the SBR for more effective functioning. Input data for dimensioning are wastewater loads and desired treatment results. The SBR is dimensioned according to this data but the model did not achieve a real state. Because of this, it was not possible to suggest any improvements for the SBR.
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