The wastewater treatment plant of the Kyrgyz capital Bishkek is currently being comprehensively modernized as part of an international joint venture. The aim of the project is to preserve as much of the existing structure as possible while integrating state-of-the-art wastewater treatment technologies

Currently, the first construction phase, with a capacity of 75,000 m³ of wastewater per day, is undergoing conversion. After completion of all phases, the plant will be able to treat around 330,000 m³ of wastewater daily—a decisive contribution to the region’s sustainable water management.

As part of the modernization, a total of 16 biological reactors are being created through the reconstruction of the existing primary, secondary clarification, and aeration tanks.

To prevent deposits in the anoxic area of the selectors, 112 Liftairs are being installed. These ensure uniform mixing without the need for additional agitators or inefficient coarse-bubble aeration systems.

The company Austria NWT has been tasked with the complete overhaul of the planning for the biological treatment. Commissioning of the first plant components is planned for the end of 2025.