Projects · Norrköping, Sweden
Ragn-Sells leachate water project
Before: black, foul-smelling leachate and two struggling aerators. After: five aerators, three bioreactors and floating barriers — a complete treatment train.
The customer's challenge
At Ragn-Sells' Häradsudden landfill outside Norrköping, only two aerators served the aerated pond — and the leachate was black, foul-smelling and in clear need of treatment.
The solution
In May 2019, three aerators were installed in the pre-pond, with an additional two aerators and a bioreactor added to the aerated pond. In March 2020, two more bioreactors were installed. During the summer, floating barriers were added to force the water through the section where the three bioreactors operate — eliminating hydraulic short-circuits.
The result
Sampling at points L1 (after the pre-pond) and L2 (after the aerated pond) shows a clear positive trend in the analysis values for the parameters targeted by the aerators and bioreactors — documented in the evaluation diagrams below.
Products used in this project
Holkof™ Bioreactor
A patented, mobile and energy-efficient bioreactor with control over flow and circulation — developed to reduce ammonium and organic matter.
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Aerator AirTURBO™ RV2
A highly energy-efficient surface aerator delivering up to 52 m³/h of atmospheric air and an oxygen capacity of 90 kg O₂/day (SOTR) — proven in 200+ installations.
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Floating Walls
Control flows and create treatment volumes in ponds. Floating walls eliminate short-circuit flows and give every treatment stage the retention time it needs.
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How we work
From the first water sample to the service agreement — a proven seven-step process ensures your system delivers the agreed results.
See our customer processNeed advice?
Describe your water challenge and one of our engineers will come back with an honest, no-obligation assessment.
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