Waste water treatment

At Petrol, we manage four concessions for municipal wastewater treatment. These include municipal wastewater treatment plants located in Murska Sobota with a capacity of 42,000 PE, Mežica with 4,000 PE, Sežana with 6,000 PE, Ig with 5,000 PE, and ZGO Ravne with 1,200 PE.

The municipal wastewater treatment plants we manage treat wastewater through various stages of purification to a level suitable for discharge into watercourses or the environment. A portion of the treated water is reused in the technological cleaning process, such as for washing mechanical equipment (e.g., coarse and fine screens), mechanical sludge thickening, flocculant preparation, and surface cleaning. The process water is collected in an internal sewage system after use and is treated again at the municipal wastewater treatment plant.
In 2024, we treated over 4.7 million m³ of municipal wastewater.