Washington Park Arboretum

This project marks the start of a close cooperation between John and Jakob  – and they went on to work together for many years in the US. Their collaboration has played a major part in the foundation of Swedish Hydro Solutions.

The Japanese garden in Seattle

When an 18” water main broke in the Washington Arboretum and sent soil, road oil and debris into the Japanese Garden’s Koi pond, the lives of irreplaceable fish and the whole ecosystem were in danger.

Within a critical 24 hour time window treatment with chitosan and sand filtration was initiated to reduce the turbidity levels and improve the overall aesthetics of the Koi Pond. After two days of treatment approximately one million liters had been treated and the high turbidity of the water had been reduced from 155 NTU to below 5 NTU after treatment.

The treatment project ensured the survival of the Koi fish and improved the overall ecosystem in the ponds. The reduction of suspended sediment also resulted in reduced problems with oxygen depletion of the water – something which had been a problem in the past. Finally, the park could be reopened to the public with visual improvements in water quality.

This was the first time Jakob Sjöberg and John Macpherson worked together with chitosan based technology. The project was the starting point for a close collaboration between Jakob and John in the U.S. It was key in the foundation of Swedish Hydro Solutions.

Treatment results (turbidity)

  • Untreated water (155 NTU)
  • After chitosan treatment and filtration (<5 NTU)

More images

More projects

Hagalund Work Tunnel

Hagalund Work Tunnel

Chitosan flocculation in large-scale tunnel projects is very effective. In order to test the same technology used by several West Link projects, the international construction company Implenia decided to purchase an entire system, including professional services, from Swedish Hydro Solutions.

read more
West Link – Central Station

West Link – Central Station

The West Link section “Central Station” project is NCC’s largest construction contract ever. Swedish Hydro Solutions has been contracted for the water management in this project.

read more
Project Olskroken

Project Olskroken

Project Olskroken with Peab Prior to the large infrastructure project, known as the West Link, Swedish Hydro Solutions method for water treatment using chitosan is evaluated at Olskroken.Good results in the pre-study before the construction of the West LinkProject...

read more

Write to us!

4 + 3 =

Kristineholmsvägen 26 A
441 39 ALINGSÅS
+46 (0)322-12747