The aim of these assignments was the intensification of the mechanical and biological degree of the Wastewater treatment plant (WWTP) in Žilina, the reconstruction of its energetic block and of the drainage for the sludge, SDRTP and cable routes, reconstruction of the supply sewer, HVAC and heating including the operational files. Besides that sewerage collectors and sewers 131 000 m long with the dimensions DN 250 and DN 800 were built as well as 6250 sewerage connections
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