Tertiary Wastewater Treatment – Tricel TERO
by Tricel Environmental UK
Tricel TERO is a compact, modular tertiary wastewater treatment system designed to further polish effluent following secondary treatment. It is typically installed downstream of a packaged sewage treatment plant where enhanced effluent quality is required to meet planning conditions or environmental standards.
The system uses a natural coconut coir filtration media to provide additional biological, physical and chemical treatment. Effluent is evenly distributed across the filter media, allowing remaining fine solids and pathogens to be reduced before clean, treated water exits the unit. Independent testing has demonstrated excellent E. coli reduction, making the TERO suitable for environmentally sensitive sites and restricted discharge areas.
Each TERO module serves up to 6 Population Equivalent (PE) and can be combined in a modular arrangement to accommodate larger domestic or small commercial applications. The unit requires no power supply, contains no moving parts and does not require desludging, resulting in minimal maintenance and low lifetime operating costs.
With its shallow profile, flat base and single inlet connection, the Tricel TERO is simple to install and easy to integrate into landscaped areas, making it an ideal tertiary treatment solution for UK projects.
Specification Details for Tertiary Wastewater Treatment – Tricel TERO (Packaged Waste Water Treatment Plant)
Please note that these product properties are not a replacement for the manufacturer's literature and it is always recommended that Tricel Environmental UK is consulted before specifying.
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File Downloads for Tertiary Wastewater Treatment – Tricel TERO
Tertiary wastewater treatment is an advanced filtration stage that further purifies effluent after it has undergone primary and secondary treatment. It removes additional pathogens, fine suspended solids and contaminants, producing higher-quality water that can be discharged safely to ground or compliant drainage areas.
The TERO receives effluent already treated by a packaged sewage treatment plant (such as a Tricel Novo). The effluent is evenly distributed over a natural coconut coir filter media where biological, chemical and physical processes further purify the water before it is discharged at the base of the unit.
- Improved pathogen reduction: Proven E. coli reduction in line with Environment Agency expectations.
- Natural filtration: Uses renewable coconut coir media — no chemical additives needed.
- Simple installation: Flat base and single inlet connection reduce installation time and cost.
- Low maintenance: No electrical components or desludging required.
- Compact design: Ideal for tight sites or landscape-sensitive locations.
Yes — provided the secondary treatment plant discharges via a pumped, controlled dosing system that ensures consistent effluent distribution into the TERO.
One TERO module is designed for up to 6 Population Equivalent (PE). Multiple modules can be combined to serve larger domestic or small commercial sites.
In many situations, the improved effluent quality from tertiary treatment reduces the footprint and soil depth required for percolation, making it suitable for sites with high water tables, poor ground conditions or limited space.
The TERO is designed for low upkeep: there are no electrical parts or routine desludging requirements, but it should be inspected periodically in line with general wastewater system servicing best practices.
Yes — the TERO system is CE-certified and manufactured to meet European standard EN12566-7, which covers quality of components and overall system performance.
Tertiary treatment is often specified:
In environmentally sensitive locations.
Where planning conditions require higher effluent quality.
On sites with restricted percolation area or challenging soil conditions.
For tailored guidance on sizing, installation and specification, contact a Tricel sales or technical adviser — they can recommend the best TERO configuration for your project
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