Estonia’s largest water utility signs public contract for biogas digesters

Tallinna Vesi, the largest water utility company in Estonia, signed a public contract with RVT Ehitus and Mapri Ehitus for the reconstruction of digesters that produce biogas in the wastewater treatment plant at Paljassaare. The contractual amount of reconstruction works will be €3,843,794.38 plus VAT.
This marks a major investment, according to Aleksandr Timofejev, chairman of the management board at Tallinna Vessi. It will allow an increase in biogas production in digesters, meaning that Tallinna Vesi will be able to produce from biogas all the heat and electricity needed for the wastewater treatment process.
According to the contract, the design and reconstruction of the Paljassaare plant's digesters must be completed within 34 months.
The tasks of the contractor will include preparing an operational building design documentation based on the existing preliminary building design documentation, performing concrete repairs on digesters, ordering and installing any equipment in need of modernisation, installing new power and weak current installations, upgrading automation, creating parallel operation capability, installing an anti-foaming agent sprinkler system and keeping the running digester in operation.
According to Timofejev, Tallinna Vesi started mapping its CO₂ footprint two years ago and the company has been active in reducing the environmental impact of its activities.
In order to reduce the footprint, 100% of electricity used at the company’s facilities and in the treatment process is now generated from renewable sources.