Expansion and renovation of the Daugavgrīva biological wastewater treatment plant

Summary

The tender concerns the expansion and renovation of the Daugavgrīva biological wastewater treatment plant in Riga. The works include new biological treatment tanks, secondary settling tanks, a recirculation sludge pumping station, deammonification equipment, upgrades to aeration, blowers, discharge pumping, pipelines, electrical and low-voltage systems, control system integration, and a supervisory system. The contract term is 36 months from the start of works to commissioning. The bidder must inspect the site, submit the bid electronically in EIS, provide a bid security of EUR 100,000, and later the successful bidder must provide a performance security of 10% of the accepted contract price.