Success Story : State-of-the-art wastewater treatment plant in Finland – Blominmäki

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

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.

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.

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 WANGEN pumps and Franklin Miller's Taskmaster® crushers supplied by FlowExperts Oy represent the latest excellence in the field of sludge handling.

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 dried.

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.

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 install 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.

5% municipal sludge:

• 2 pcs Wangen Xpress 64
  

Liquid fat fractions, etc.:

• 1 pcs Wangen pump type, Xpress 78 / 7,5 kW
  
• 3 pcs Wangen pump, KL50S 60.2 / 7,5 k
  

Glycol etc.:

• 2 pcs Wangen pump, KL50S 60.2 / 7,5 kW
  

0,5% Polymer:

• 2 pcs Wangen pump, type KB22S type 32.0L /1,1 kW
  
• 2 pcs Wangen pump type, Xpress 48 / 3,0 kW
  
• 5 pcs Wangen pump type, Xpress 48 / 1,5 kW
  
• 4 pcs Wangen pump type, Xpress 48 / 2,2 kW
  

0,1% Polymer:

• 4 pcs Wangen pump, type KB22S type 32.0L/1.1 kW
  

• 4 pcs Wangen pump type, Xpress 48 / 2,2 kW

4,0 %TS raw mix sludge:

• 8 pcs Wangen pump type, Xpress 94 / 15 kW
  
  

2,5 - 4,0 %TS raw mix sludge:

• 4 pcs Wangen pump type, Xpress 64 / 7,5 kW
  
• 7.0 %TS Sakeutettu liete
  
• 4 pcs Wangen pump type, KL65S 101.1 / 11,0 kW
  

4 - 5 %TS Digestive sludge:

• 8 pcs Wangen pump type, Xpress 64 / 4,0 kW
  
• 6 pcs Wangen pump type, Xpress 64 / 7,5 kW

The WANGEN PUMPEN Xpress range of pumps with compact design and very small footprint were particularly suited for this underground project with limited space availability.

WANGEN PUMPEN Xpress video

Chemical dosing, mechanical and biological wastewater treatment, sludge dewatering and sludge drying: WANGEN PUMPEN offer a comprehensive program of robust and highly reliable pumps, which satisfy requirements of wasterwater treatment plants. In this way, we help plant operators to keep their wastewater treatment plant operating smoothly while keeping operational costs (OPEX) to a minimum.

Since April 2022 WANGEN PUMPEN is part of the Atlas Copco Group.