In connection with the optimization of operation at the selected Wastewater Treatment Plant (WWTP), it is important to perform an energy audit with an assessment of the use of electricity and the subsequent economic optimization of the equipment of the WWTP. We can perform the energy balance through Life Cycle Assessment (LCA) analysis in relation to EN ISO 140 40 [1].The aim of this study case is the analysis of the energy balance of WWTP. The appraisal was performed on three different interpretation variants of specific electricity consumption. The conclusion is a comparison of variants of quantification of specific electricity consumption.

Stormwater management is an integral part of the new concept of wastewater disposal from urbanized areas, which includes all system units into a comprehensive, integrated system. This concept, based on sustainable principles, brings environmental and socio-economic benefits. The integrated stormwater management system facilities reduce the load on wastewater treatment plants and receiving water bodies while contributing to the restoration of local ecosystems. In this context, the paper focuses on the possibilities of using life cycle analysis to design specific integrated systems. The aim is to summarize the life cycle assessment studies of stormwater management facilities so that they can be applied in the future as a basis for the design of efficient and sustainable drainage systems in urban areas.

Waste management models began to develop in the second half of the last century when municipal waste production began to grow. At the time, they focused only on

The aim of the study is to assess the hydraulic capacity of the sewer network and sewer collector recovery in the urban catchment area of Trnava.The analysis focuses on the evaluation of situations with different precipitation frequencies. Elaboration consists of modeling the current state of the assessed sewer collector B and subsequent loading of this collector by several block rainfalls. Based on the results of the analysis, the recovery of the sewer network proposed.