Category A project

Tampereen Seudun Keskuspuhdistamo

Country: Finland
Borrower: TAMPEREEN SEUDUN KESKUSPUHDISTAMO LTD
Sector: Energy & environment
Published for 30 days on: 21 Dec 2018
Planned date for decision by Board of Directors: 14 Feb 2019

Project summary

The Tampereen Seudun Keskuspuhdistamo (Tampere Region Central Treatment Plant) project will safeguard the treatment of sewage effluents in the Pirkanmaa region far into the future.

The project is in preparation for the year 2040, with an expected population of up to 429,000 inhabitants in the region. In addition to settlements, the central treatment plant will be dealing with sewage from industry and service industries. The plant will be built in the Sulkavuori bedrock.

The purified effluent will pass through the bedrock tunnel from Sulkavuori to Vihilahti area and further along the discharge pipeline to Lake Pyhäjärvi. The discharge line changes from a bedrock tunnel to a water-installed pipeline in Vihilahti due to the deepening of the bedrock surface. The pipeline is installed in the bottom of the lake partially through excavation and partially through descent. The drainage lines from the direction of Rahola, Pirkkala and Lempäälä are almost entirely designed for street and road areas and waterways.

The centralised effluent treatment solution is aimed at utilising the latest technologies. The project will reduce the effluent load on Lake Pyhäjärvi and the water system below it. The project will improve the hygienic condition of the water system in Lake Pyhäjärvi and Lempäälä below the Hiidenvuolle water system.

The wastewater treatment plant will be an active sludge plant operating on a parallel precipitating principle, where the wastewater is mechanically, chemically and biologically cleaned. The purified effluent will be disinfected by UV treatment.

The construction work at Sulkavuori has commenced, and the wastewater treatment plant is expected to begin operations in 2024. The existing wastewater treatment plants at Viinikkala and Rahola in Tampere as well as in Lempäälä will be closed. All three existing plants are located in the middle of the community structure in valuable waterfront areas. The vacant land areas will allow for significant complementary planning in both Tampere and Lempäälä, which is considered a viable utilisation of sustainable municipal resources.

The central wastewater treatment plant is a joint venture between the municipalities of Kangasala, Lempäälä, Pirkkala, Tampere, Vesilahti and Ylöjärvi.

Tampereen Seudun Keskuspuhdistamo Ltd has conducted a full environmental impact assessment for the project and received the environmental permit on 5 April 2018.

NIB welcomes comments on the project in question.

NIB welcomes comments on the project in question.

Project sponsor contact information

Timo Heinonen
Managing Director
timo.heinonen@keskuspuhdistamo.fi
Tampereen Seudun Keskuspuhdistamo
Hatanpään valtatie 26, 33100 Tampere

NIB contact information

info@nib.int
Please write "Category A project" in the subject field.
Nordic Investment Bank
Environmental Unit
P.O. Box 249
FI-00171 Helsinki
Finland

This document was prepared and disclosed at an early stage of NIB's review of the project, before consideration by NIB's Board of Directors. Details of the project may change following disclosure.
The Environmental Impact Assessments (EIA) and EIA summaries are produced by the project sponsors, and NIB makes them available without any comment or implied endorsement. Any views expressed or statements made in the EIA or the EIA Summary do not necessarily reflect the views or opinions of NIB.