MUEB-K-MON - Emission load estimates from the two combined sewer overflow tanks of wastewater treatment plant Klagenfurt

The two combined sewer overflow (CSO) tanks at wastewater treatment plant (WWTP) Klagenfurt are the only combined sewer overflows in the whole catchment area of WWTP Klagenfurt. The two CSO tanks discharge their overflows in a very runoff-weak receiving water body. For this reason, the two combined sewer discharges are to be assessed not only on the emission side but also on the immission side in accordance with ÖWAV Guideline 19 (2007). For an immission-side assessment in the receiving water body, emission load estimates from the overflow of the two CSO tanks into the water body are required. Within the scope of the project, the sedimentation efficiency for the Total Suspended Solids (TSS) in the two existing CSO tanks at WWTP Klagenfurt as well as specific emission pollutant loads from the two CSO tanks into the receiving water are metrologically estimated by means of measurement campaigns.