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Reduced Costs in Wastewater Treatment Process

Hätälä fish refinery used to channel all their wastewater directly to the municipal wastewater treatment plant. Not only they faced high costs, but they also experienced repeated blockages in the system caused by grease and solids in the sewers. Flowrox and Owatec suggested a sludge and wastewater treatment process with remote monitoring, separation of solids, repurposing solids and fatty sludge. The result of the process improvement is reduced wastewater cost which amounts to 25 % less on the annual level. 

  • Customer & application: Hätälä, Finland’s leading fish producer, fish processing wastewater treatment
  • Challenge: High wastewater costs (€/m³)
  • Solution: Water and sludge treatment with remote monitoring, separation of solids, repurposing solids and fatty sludge
  • Results: Less waste, reduced load to municipal WWTP, 25 % savings in wastewater costs, preventive maintenance

Solids No Longer Block Sewers in Wastewater Treatment Process

Hätälä fish refinery used to channel all their wastewater directly to the municipal wastewater treatment plant. Not only they faced high costs, but they also experienced repeated blockages in the system caused by grease and solids in the sewers.

After careful examination, Flowrox and Owatec experts suggested establishing a pre-treatment unit that would separate solids and grease from the wastewater. Per year, Hätälä handles 110 000–130 000 m³ of wastewater and 500–1000 tons of sludge. With these amounts, already separating the solid particles could significantly improve or eliminate the issues.

The wastewater treatment process equipment by Owatec and Flowrox Malibu automation have been innovative and the process is running smoothly. We have gained both savings and lower impurities levels. – Riku Isohätälä, CEO Hätälä Oy

We created a customised wastewater treatment process. The entire operation is automated and remotely monitored with Flowrox Malibu (IIoT platform). This allows Hätälä to save time and focus on their core business. The automation system also monitors pollutant limit values. With only a few clicks, the customer can get instant reports about quality values and treated volume.

Since the installation of the wastewater unit, Hätälä gets two in one: a 25 % reduction of wastewater costs and lower level of impurities. Because solids and grease are now removed from the wastewater, the sewers do not get blocked. What is more, solids and fat sludge are used as biogas feedstock. Recycling such valuable components contributes to better use of resources and reducing the environmental impact.

Full Automation Through IIoT Platform

The entire wastewater treatment process is fully automated: remotely monitored and controlled with Flowrox Malibu, the IIoT platform. Hätälä staff can access the view from any device with an internet connection. Below is the overall view of the wastewater treatment process before the water reaches the sewers.

wastewater-treatment-automation-iiot-Flowrox

Flowrox Malibu online monitoring keeps you up-to-date about process operation at any time and any place.

  1. Inlet unit: transfer pumps and screening
  2. Dewatering unit
  3. Chemical dosing unit
  4. Flotation unit: solids and fat separation
  5. Sludge tank for solids separated in flotation
  6. Discharge to sewer

 

Our customer: Hätälä Oy

Hätälä is Finland’s leading fish producer located in Oulu, Northern Finland. They employ over 200 fish-processing professionals and have revenue of over 100 M€. Hätälä prides itself in responsibly farmed or caught fish in their products.

Key benefits

Annual savings -25 % from wastewater costs

Grease and solids no longer block the sewers

Sludge is used for biogas production

testing
NOTE: Flowrox pump and valve businesses sold to Neles
NOTE: Flowrox pump and valve businesses sold to Neles