Water treatment at fish processing site

Hätälä Oy is a leading fish producer in Finland driven by responsible choices at every stage of their fish production processes. Among many actions for environmental responsibility, they pretreat their wastewater locally.

Where it all started

Before cooperation, wastewater from the processes at the factory site went straight to the municipal wastewater treatment plant. Without a local pretreatment, the process caused the following challenges:

  • High wastewater costs
  • Large-scale blockages in the area’s sewage network

Hätälä and Owatec started the cooperation in 2018, and nowadays, the service agreement enables optimized water treatment processes for up to 130 000 m3 of wastewater and 1000 tons of sludge annually.


ALL-IN-ONE service to achieve objectives

Owatec service agreement provides the needed technology in modular sea containers. The service of water treatment experts, together with automation and remote overseeing&controlling ensures optimized processes around the clock.

After carefully made laboratory testing and full-scale piloting, the final water treatment plant now includes the following solutions:

Treated water 130,000 m3/a

Flow capacity 300 m3/h

Wastewater containing a lot of solids and grease is typical for the companies in food and beverage industry. Owatec’s environmentally friendly process meets the expectations in reductions enabling Hätälä to make immediate savings in water treatment costs and keep up with their ongoing work with environmental and social responsibility.

Reductions of the impurities 

  • Solids 96%
  • COD 86%
  • Total Phosphorus 70%
  • Total Nitrogen —

High reductions like this not only meet the expectations of environmental responsibility but also give 25% savings annually in wastewater treatment costs.



”The wastewater treatment process solution by Owatec is innovative, and the process is running smoothly. We have gained both savings and lower impurities levels.”

Riku Isohätälä, CEO Hätälä Oy

Automation with remote overseeing and control enables optimized processes 24/7