MATRIX Topas Plus: The Smarter Solution for Phosphate and Nutrient Reduction
Across the UK and Europe, stricter nutrient neutrality and water quality regulations are changing how developments manage wastewater. Discharging untreated or nutrient-rich effluent is no longer an option — particularly near sensitive environments like rivers, lakes, and wetlands.
That’s why we developed the MATRIX Topas Plus system — an advanced sewage treatment solution that combines the reliability of the MATRIX range with enhanced phosphate and nitrogen removal for environmentally critical or nutrient-sensitive sites.
Designed for the Future of Wastewater Treatment
Traditional sewage treatment systems remove organic matter and suspended solids effectively, but they often leave high amounts of phosphorus and ammonia in the final effluent. These nutrients, while harmless in small quantities, can cause eutrophication — the excessive growth of algae and aquatic plants that suffocates water ecosystems and other general pollution.
The MATRIX Topas Plus is engineered specifically to prevent this. It provides full biological treatment and an additional stage for nutrient polishing, ensuring a ultra-clean discharge.
How the MATRIX Topas Plus Works
Building on the proven MATRIX biological treatment process, the Topas Plus introduces an advanced chemical and biological stage that targets residual nutrients:
Phosphate reduction to 0.2 mg/l
Ammoniacal nitrogen as low as 0.5 mg/l
BOD typically around 8 mg/l
Suspended solids less than 10 mg/l
This is achieved through a carefully controlled combination of:
✅ Biological nitrification and denitrification
✅ Phosphorus reduction (using a measured real-time chemical dose precipitation via an integral control unit)
✅ Clarification and settlement polishing
The result? Effluent that not only meets but exceeds UK discharge standards — ideal for sensitive catchments under nutrient neutrality restrictions.
Where Topas Plus Makes a Difference
The MATRIX Topas Plus is ideal for:
Developments in nutrient neutrality zones
Sites near rivers, lakes, or protected habitats (SSSIs, SACs, SPAs)
Eco-resorts and holiday parks committed to sustainability
Commercial and community sites needing higher treatment efficiency
By achieving ultra-low nutrient levels, Topas Plus helps new developments gain planning approval and maintain long-term environmental compliance.
Built with MATRIX Reliability
Every Topas Plus system shares the same robust design principles as the core MATRIX range:
Manufactured to EN 12566-3
No internal mechanical moving-parts for long-term reliability
Modular and scalable, from small domestic systems to multi-PE commercial units
Easy maintenance with clear access points and minimal servicing needs
This means you get all the simplicity and strength of the MATRIX brand — with advanced nutrient reduction built in.
Compliance Made Simple
Phosphate and nutrient reduction requirements are only getting tighter — but Topas Plus keeps you ahead of the curve.
Our systems are designed to help developments comply with:
General Binding Rules
Building Regulations Part H
Local nutrient neutrality policies
European discharge directives
Whether you’re managing a single rural home, a housing development, or a tourism site, Topas Plus delivers compliance without compromise.
The Future of Sustainable Wastewater
Clean, compliant, and environmentally responsible — the MATRIX Topas Plus represents the next generation of off-mains wastewater treatment.
By reducing phosphates and ammonia to ultra-low levels, it helps protect our waterways and enables sustainable development — without adding complexity for installers or end-users.
Because at Clenviro, we believe the environment shouldn’t be an afterthought - It should be factored in from the start.
Learn more about our Matrix Topas Plus Systems by visiting our Matrix Topas Plus page or learn more about our Matrix Systems by visiting our Matrix page. Alternatively, contact us on 01952 676666 / info@clenviro.co.uk.