15 April JSC “Kauno vandenys” signed a new contract with Krüger that will improve the performance of the plant and the impact on the environment significantly. The online control to be implemented, Hubgrade Performance Plant, will reduce energy consumption by up to 25% per year for aeration and mixing while also reducing cost of pollution by up to 20%.
Complying with effluent demands
Kaunas WWTP (375.000 PE) is a biological nutrient removing plant using biological nitrogen removal by simultaneous nitrification/denitrification together with biological phosphorus removal technology. In general, the plant fulfils the effluent demands, but during heavy rain the biological treatment is bypassed due to increased loads, which has resulted in high pollution taxes for untreated wastewater.
The client’s primary goal is to reduce the operational expenditures on energy consumption, chemical dosing and external carbon dosage. By installing Hubgrade Performance Plant, Kauno vandenys will reduce energy consumption for aeration and mixing by ~50 k€/y while also reducing cost of pollution taxes on total N by ~12 k€/y.
Largest plant in Lithuania to implement Hubgrade
After visiting a WWTP in Riga and in Klaipeda, which has the first ever Hubgrade Performance Plant installed in Lithuania, the client decided to implement the software at their own plant. They selected 9 features in total.
Benefits for the client
- Better compliance with the effluent demands
- Operation stability
- Flexibility to the load fluctuations
- Reduced carbon footprint up to 230t CO₂-eq per year
- Reduced energy consumption for aeration and mixing by ~50 k€/y
- Reduced cost of pollution taxes on total N by ~12 k€/y
Fact box
- Kaunas WWTP (375.000 PE)
- Average rain weather flow: 125,081 m3/day
- Dry weather flow: 79,656 m3/day
- 9 selected Hubgrade features: 4x DO&N, 4x Mixer, 1x Air Supply
Your benefits include operational and environmental efficiency.
In addition, the client made important CO2 savings (~ 2 100 T CO2-eq/year) and SMART Bio-P: Introduction of significant biological phosphorus removal in existing process volumes.