As part of the investment project carried out by NDI ENERGY, a modern sewage treatment plant was built in Sośnie.

The works covered a wide range of activities, such as wastewater treatment technologies, building structures, electrical works, automation and control equipment, and land development.

These activities included the construction of a sewage collection and transport system with a mechanical treatment stage, a biological sewage treatment reactor, and the construction of a sludge management centre with a sludge stabilization chamber and a dewatering and sludge sanitation station.