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59 WANGEN pumps for underground wastewater treatment plant in Finland

Photo by Pumpenfabrik Wangen GmbH

The growing number of inhabitants in the Helsinki metropolitan area and the treatment of more nutrientrich wastewater required a new wastewater treatment plant to be built with a higher capacity and highquality technology for the treatment process.

Blominmäki’s modern wastewater treatment plant was commissioned in 2022. WANGEN pumps are key components of the plant’s wastewater treatment process.

Built mainly inside the rock

The new wastewater treatment plant of the Helsinki Region Environmental Services Authority (HSY) is locatedin Blominmäki, Espoo. The wastewater treatment plant, built mainly in caves inside the bedrock, has been designed and built for several years. Some of the operation building like the administration and maintenance buildings are located above ground. The underground plant built by YIT replaces the existing Suomenoja wastewater treatment plant, which was responsible for the wastewater of the area’s 400,000 inhabitants.

Strict targets

In the treatment targets, the Blominmäki plant aims high to separate the nutrients that eutrophicate the water from the wastewater as accurately as possible. Phosphorus and organic matter are removed from wastewater by 96% and nitrogen by more than 90% – both values are lower than the EU and municipal recommendations for wastewater.

Reliable and environmentally friendly wastewater treatment plant

The Blominmäki wastewater treatment plant is an example of a modern treatment plant that has invested in an efficient wastewater treatment process using technical design and high-quality technology.

The installment of low maintenance WANGEN pumps, ensures safe and cost-effective treatment of plant sludge. The plant is carefully designed for energy efficiency and the plant is able to utilize the energy generated in the wastewater treatment process, as well as biogas for its own use. In addition, all heat generated by the production of electricity and the use of large machines is collected. The smooth running WANGEN pumps are very energy efficient and ensure that sewage sludge is optimally conveyed and

Future needs anticipated

The Blominmäki wastewater treatment plant has been carefully designed with the growing needs of the future in mind. The capacity of the new plant is many times higher than the former Suomenoja water treatment plant, as the amount of wastewater treated will double to an estimated 150,000 cubic liters per day in a couple of decades. It is possible to expand the underground facilities of the wastewater to more than one million inhabitants, which is why the plant’s capacity will be sufficient to treat the wastewater in the area for at least the next hundred years.

For the most demanding operating environment

In the Blominmäki wastewater treatment plant project, YIT’s Santeri Saarikko is working as the project manager for the machinery and process
side. As an expert in the wastewater sector, Saarikko has been responsible for Blominmäki’s plant design and technical equipment selection, among other things.

Harri Österman is pleased with YIT’s decision to selection of WANGEN sludge and polymer pumps for the new Blominmäki plant. Designed
for biogas and wastewater treatment plants, WANGEN pumps are robust, reliable and virtually un-blockable.

Harri collaborated closely with the project design team in order to select the most efficient pumps for the project. This included several site visits
in order to get to know the plant and performing an installation inspection.

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