‘Plug and play’ Oxi-Filter Unit providing an effective additional treatment step for the reduction of suspended solids in final effluent

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Ian Loader

20th July 2026

Oxi-Filter Units are the ideal solution for smaller rural communities and villages where sustainable water treatment systems are crucial and population is low…

Compact. Efficient. Sustainable.

Across the UK, wastewater treatment operators are under increasing pressure to deliver higher treatment standards while reducing energy consumption, chemical use and operational costs. At the same time, many existing treatment works have limited space for expansion and are facing increasingly stringent environmental regulations.

The challenge is clear: how can treatment performance be improved without major civil engineering projects or costly plant extensions?

The answer lies in smarter process design.

Introducing the PWS Oxi-Filter Unit

The PWS Oxi-Filter Unit has been developed as a compact, high-performance treatment solution that enhances wastewater quality while significantly reducing the footprint and operational complexity associated with conventional treatment processes.

Designed retrofit applications, the Oxi-Filter Unit offers an efficient solution for municipal and industrial wastewater treatment where space, cost and sustainability are key considerations such as villages and areas of low population.

Why Conventional Systems Fall Short

Many wastewater treatment plants continue to rely on ageing infrastructure that can be:

  • Land intensive
  • Energy hungry
  • Expensive to upgrade
  • Difficult to adapt to tighter discharge consents

Expanding an existing works often requires new settlement tanks, additional civil engineering and extensive site modifications, all of which increase capital costs and project timescales.

The PWS Oxi-Filter Unit has been developed to overcome these challenges.

Key Benefits

Compact Design

The Oxi-Filter Unit provides high treatment performance within a much smaller footprint than many conventional systems, making it ideal for sites where land availability is limited.

Lower Operating Costs

By optimising the treatment process, the unit can help reduce:

  • Energy consumption
  • Chemical dosing requirements
  • Maintenance requirements
  • Whole-life operating costs

Improved Treatment Performance

The Oxi-Filter Unit is designed to consistently produce high-quality treated effluent, helping to meet increasingly demanding environmental standards.

Sustainable by Design

The Oxi-Filter Unit supports environmental objectives by helping operators:

  • Reduce carbon emissions
  • Lower energy usage
  • Minimise chemical consumption
  • Improve overall treatment efficiency

    Future-Proofing Wastewater Treatment

    As regulations continue to tighten, some treatment works need technologies that deliver better performance without dramatically increasing costs.

    The PWS Oxi-Filter Unit has been developed with exactly this challenge in mind—providing operators with a flexible, efficient and sustainable treatment solution that is ready for the future.


    Interested in learning more?

    If you’re looking for innovative solutions to improve wastewater treatment performance while reducing operational costs and environmental impact, we’d be delighted to discuss how the PWS Oxi-Filter Unit could benefit your site.

    Contact Plantwork Systems to arrange a discussion or request further technical information.

    Article by Ian Loader, Plantwork Systems Managing Director