packaged filter systems

Tricel Puraflo

Secondary & tertiary wastewater treatment is the further treatment of effluent that is coming from the primary treatment tank. Secondary and tertiary treatment is required when the soil or grounds are located on sensitive sites such as water table protection areas. The combined treatment will result in a high-level pathogen and nutrient reduction.

We can help you to size the packaged filter you need.

packaged filter systems

Secondary & Tertiary Wastewater Treatment


What is a Tricel Puraflo Treatment Plant? 


Tricel Puraflo treatment modules are ideal as a polishing filter for secondary and tertiary wastewater treatment applications.

Environmentally sensitive sites, such as in water table protection areas, often require a higher level of treatment. The required level of treatment is achieved by combining Puraflo modules with a secondary treatment tank, typically an aerobic treatment unit.

The secondary treated effluent goes through a third treatment process (tertiary treatment). Puraflo polishing filter modules and the combined system will provide very high-level pathogen and nutrient reduction.


Visit our Virtual Showroom to interact with our 3D Puraflo today!


Secondary and Tertiary Wastewater Treatment

Puraflo installation as a tertiary treatment

Tricel Puraflo can be used as both secondary treatment following a septic tank and as a tertiary treatment following a wastewater treatment plant.

This illustration below is a typical Puraflo installation as a tertiary treatment.

How does a Tricel Puraflo system work?

Collection: Sewage & Wastewater flows from the building into a septic tank or wastewater treatment plant. The solid particles settle, and the liquid effluent flows by gravity through an effluent filter to a pump/sump chamber.

Treatment: The effluent is pumped intermittently to the Tricel Puraflo system, which is dispersed evenly onto the coconut fibre. A mixture of biological, chemical, and physical processes treats the effluent as it filters through the coconut fibre media.

Dispersal or water reuse: The treated effluent flows from the Puraflo modules and disperses itself into the ground through a percolation area. It could also get collected for disposal by other methods. The high treatment levels achieved in the Puraflo system reduce the risk of pollution whilst providing protection for homes, the environment and public health.


Key features & benefits

Secondary & tertiary wastewater treatment

  • Flexible sizing options due to modular design features.
  • Odour-free treatment.
  • Little to no energy consumption eco-friendly.
  • Ideal for holiday homes as compatible for seasonal or intermittent use.
  • Certified to EN12566-3.
  • High-level pathogen and nitrogen removal.
  • Green solution, based on passive biofiltration principles.
  • Minimal maintenance & operational requirements.

Interact with the Tricel Puraflo Packaged Filter System

  • Click on the numbers to see the annotations.
  • To view in Virtual Reality (VR), click the square at the top right-hand corner and simply scan the QR code with your phone.
  • To check the dimensions, click on the spanner icon.
  • To download an image of the Puraflo module, click on the camera icon (top right-hand corner)

Finally, you can also visit THE LAB by Tricel to view the Puraflo in a Virtual Showroom, interact with 3D models, view images and product videos.

Secondary and Tertiary Wastewater Treatment

Simple installation, Minimum maintenance

Tricel Puraflo is a modular wastewater treatment system that can be for a larger or smaller capacity depending on a house or building size.

The Puraflo system uses coconut fibre to break down the effluent making this type of treatment system popular using little to no energy.

The Tricel Puraflo modular system works in conjunction with your septic tank or wastewater treatment plant.

Secondary and Tertiary Wastewater Treatment

Tricel Puraflo for homeowners

The Puraflo domestic wastewater system works in conjunction with the homeowners existing septic tank or wastewater treatment system.

The Puraflo system has many advantages for the homeowner, including ;

  • Minimal power consumption: for a typical small unit Puraflo system, the minimal power consumption would be 25KWh per annum. This is equivalent to the cost of operating a 13W LED light bulb used in a bedroom.
  • More installation options: the system can be installed both below and above ground level.
  • No concrete backfill required: excess excavated material may be used as backfill. This means reduced installation costs for the homeowner.
  • Less maintenance costs: the Tricel Puraflo biofilters do not need to be desludged. Once the septic tank and sump chamber receive regular desludging, the Puraflo will continue to work effectively.
  • Suitable for holiday homes: the Tricel Puraflo is equipped to handle seasonal and intermittent loads.       
  • Reduced risk of mechanical failure: our Puraflo system is eco-friendly and we rely on our coconut fibre to do most of the work.  The only electrical component used in the Puraflo is a pump. The pump works intermittently, reducing the risk of mechanical problems.
CASE study

Puraflo and Septic tank instalation

Secondary and Tertiary Wastewater Treatment Puraflo module dimensions (mm)


How many Tricel Puraflo modules do you need?

The Puraflo treatment system is supplied in a number of modules such as the one illustrated above. The number of modules depends on the number of people who would normally occupy the property.

These sizing guidelines have been designed following the EPA Wastewater Treatment Manuals for single dwellings.

  • Single house unit with up to 8 PE = 2 modules
  • Single house unit with up to 12 PE = 3 modules
  • Single house unit with up to 16  people = 4 modules
  • Single house unit with up to 24  people = 6 modules

Puraflo prices and further information

For pricing and further information about secondary or tertiary wastewater treatment, please contact our sales team, who would be delighted to discuss the best Puraflo offers available to you.


Puraflo Packaged Filter System

2 Puraflo sewage system and Tricel Novo- secondary tertiary wastewater treatment

Two Puraflo installed with a Tricel Novo wastewater treatment plant

Puraflo Module and Tricel Pure installed

Puraflo Packaged filter system installed

Tricel Novo


Tricel Novo

Ease of installation

Tricel Novo



Tricel wastewater treatment plants are fully tested and accredited to European standards for CE certification. Tricel wastewater treatment plant meets with EN12566-3 requirements which test both the quality of the components as well as the overall performance of the plant.

CE Certification
ISO Certification

Is it possible for more than one house to share a wastewater treatment plant?

Various plants are available from Tricel for different options. Discussing this with your local council is best to determine a suitable solution.

When the treated water is discharged, is it required to go to a polishing filter?

Yes. It is necessary to have a polishing filter for both secondary and tertiary treated wastewater. There can be : 

  • A tertiary soil polishing filter for treatment, which is our tertiary Puraflo module.
  • A sand polishing filter, which is our Sandcel module. 

For disposal of secondary treated effluent to the ground, a distribution of pipework called a percolation area or a pumped pressurised soil polishing filter can be used as well as other disposal types as per EPA CoP 21. A tertiary treatment system follows a secondary treatment system for further wastewater treatment, Which can reduce the size of the polishing filter.

Get in touch

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    Tricel (Killarney) Unlimited Company
    Ballyspillane Industrial Estate, Killarney, Co. Kerry, V93 X253, Ireland
    Tel: 64 663 2421