PFOS reduction in effluent water from landfill site

Rambo AB, a municipal waste management company in Sweden, faced significant challenges with PFOS contamination in effluent water from landfill site. Grundfos Water Treatment (former Eurowater) has designed and commisioned an effective solution for treating 10 m³/h of the effluent water containing PFOS.

The water treatment process includes several stages: chemical flocculation to reduce turbidity and aggregate suspended solids, settling for removing particles, sand filtration to further clarify the water, and ion exchange to effectively reduce PFOS and other PFAS pollutants.

The pretreatment stages (chemical flocculation, settling, and sand filtration) ensure that organics and suspended solids are removed, allowing the ion exchange to work efficiently. Although the ion exchange capacity will eventually exhaust, the robust pretreatment prevents clogging and fouling, thereby increasing the lifespan of the ion exchange resins.

A custom-built PLC monitor system watches sensors, pumps, and flow, alerting service technicians if needed, resulting in a reliable operation.