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Construction work on the renovation of the Imatra wastewater treatment plant has started
The repair work at Imatra's Meltola wastewater treatment plant started in August. During the works, the wastewater treatment plant will be completely renovated: The pre-treatment building of the wastewater treatment plant will be renovated, the technology will be updated to the present day, and the cleaning efficiency will be improved.
The work started in August with earthworks. Foundations for new buildings have also been built in the area during the fall.
The technology will be completely renewed
The most significant innovation is the renewal of the treatment plant's technology.
The wastewater treatment plant was built in the 1980s, and most of the equipment is original. Now the technology is updated to be up-to-date and efficient.
- A large part of the reforms are made to the equipment and are not visible from the outside. Technology is very far under water and underground, developer Pasi Huoponen Mitra tells about the developer of Imatra.
In addition to technology, buildings are also renovated. The largest building of the treatment plant, the wastewater pretreatment building, will be completely renovated: electricity, heating and cleaning equipment will be renewed in the building.
The outer shell will also be renewed and solar panels will be installed in the building.
New water post-treatment
Completely new buildings are also being built at the refinery. A new control room building, a garage, a compressor and chemical building, and a wastewater post-treatment building will be built in the area.
Post-treatment of purified water has not been done at Meltola's treatment plant before.
- In the future, the purified water is as if filtered once more through a cloth before it is allowed to flow into Vuo. With post-treatment, the phosphorus content of the water is reduced and part of the microplastics are removed, Huoponen says.
A million-euro project
17 million euros have been budgeted for the wastewater treatment plant contract. The Ministry of the Environment has granted support of 1,1 million euros to improve the plant's energy efficiency.
It should be ready in August 2023.
More information
from construction works:
Developer Pasi Huoponen, developer of Mitra Imatra, pasi.huoponen
mitra.fi (pasi[dot]huoponen[at]mitra[dot]fi), TWO TWO WHEN TWO
from the water treatment plant:
Water supply manager Kari Pietarinen, Imatran Water, kari.pietarinenimatra.fi (kari[dot]pietarinen[at]imatra[dot]fi), TWO TWO WHEN TWO
Meltola wastewater treatment plant
- Built in 1981
- Handles wastewater from the areas of Imatra, Ruokolahti, Korvenkylä, Rauha–Tiuruniemi and Rautjärvi Aseman region
- The waste water is directed to the treatment plant along three waste water pipes
- In the first stage, the waste water is directed to the mud pit and coarse material is separated from it, for example garbage and sand
- The separated precipitate is transported to a landfill, where it is used, for example, in the production of biogas
- The remaining water is cleaned and discharged into Vuo
- In the future, the purified water is directed to post-cleaning
