Hollow Fiber Nanofiltration Deployment for Municipal Water Infrastructure

A consortium led by Purac is partnering with NX Filtration, Jotem, and Wilbers to deploy hollow fiber nanofiltration systems for municipal water infrastructure. This cooperation targets the construction of the Minnesgärde drinking water treatment plant in Östersund, Sweden, to secure climate-resilient drinking water production.

Consortium Roles and Municipal Requirements
The Östersund Municipality commissioned the NCC Group to construct the new water treatment facility adjacent to the existing Minnesgärde waterworks. To meet requirements for microbiological security and preparedness against micropollutants such as PFAS, a consortium comprising Purac, NX Filtration, Jotem, and Wilbers is handling the engineering and deployment of the membrane treatment system. The collaboration integrates NX Filtration membrane manufacturing capabilities with Purac system integration expertise to handle the scale and complexity of processing water for approximately 55,000 residents.

System Architecture and Filtration Mechanisms
The facility will utilize Hollow Fiber Nanofiltration as the primary treatment barrier. NX Filtration supplies the membrane modules, while the consortium partners manage the system engineering and integration into the broader plant architecture. This filtration approach operates without the continuous dosing of coagulants or flocculants, mechanisms typically required in conventional surface water treatment to bind suspended solids. Bypassing these chemical dependencies reduces process complexity and lowers the operational carbon footprint while maintaining stable throughput.



Photo Credit: Östersund Municipality

Infrastructure Deployment and Operational Use Cases
The deployment at the Minnesgärde plant represents a transition in Scandinavian municipal water infrastructure toward multi-barrier filtration models. The system addresses concrete operational use cases, including the physical retention of pathogens, dissolved organics, and emerging micropollutants. By relying on pressure-driven physical separation rather than chemical precipitation, the infrastructure achieves higher operational resilience against varying raw water qualities caused by environmental fluctuations.

Expected Impact and Strategic Alignment
The completed facility is designed to operate as the highest-capacity Hollow Fiber Nanofiltration drinking water plant deployed to date. The integrated system provides long-term plant reliability and stabilized water production for the municipality without relying on continuous chemical inputs.

Edited by Aishwarya Mambet, Induportals Editor, with AI assistance.

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