Tertiary Treatment of Wastewater


The Tricel TERO provides tertiary treatment of wastewater that purifies the treated effluent from a packaged treatment plant. Coconut coir is used to treat the water and clean water is then discharged directly into the ground.

Proven E.Coli Treatment capabilities in line with the new EPA requirements (<1000cfu/100ml).

The Tero is designed to work in partnership with the Tricel Novo for easy Plug and Play connectivity. It is a compact system that is easy to install & simple to maintain.

Tricel Tero tertiary treatment plant
064 6632421

If you have any questions, feel free to call us

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How does a Tricel Tero tertiary treatment work?

Stage one: Tero receives secondary treated effluent from a wastewater treatment plant. The Tero is designed to work seamlessly with the Tricel Novo but can be also used with third party products, providing that a pumped discharge with a dose limit is utilised.

Stage two: the pre-treated effluent is dispersed using an easily serviceable distribution network which ensures the effluent is distributed evenly and uniformly onto natural filter media. The effluent filters through the media and is treated by a combination of biological, chemical and physical processes. The treated water is transported to the soil at the base of the tank.

Advantages of the Tero

E Coli Treatment

Improved e coli treatment efficacy. Test results show less than 1000 cfu/100ml, reducing soil depth requirements to 600mm.

Environmentally friendly

Tero is anenvironmentally friendly system that utilises natural, long-life renewable media. As a result of coconut fibre’s outstanding filtration capabilities, no chemical additives are required

Easy installation

Flat base for easy installation, one inlet connection from wastewater plant. Reduced discharge depth and area, thus reducing contractor expense and costs. 

Compact System

One model meets requirements for 6PE

Simple maintenance

No desludging required & no electrical components or power consumption


The shallow profile of tero makes it easy to incorporate into landscape design

Plug and play

System assembled module with single input connector.

Interact with the Tricel Tero Packaged Filter System

How to interact with the tank

  • To view in Augmented Reality (VR), click the blue icon on the top right-hand corner and simply scan the QR code with your phone.
  • To check the dimensions, click on the ruler icon.
  • To download an image of the Tero module, click on the camera icon. 
  • To view the annotations simply click on the pin icon.


The Tricel Tero is suitable for sites with:

  • High water tables as it can be installed above ground
  • Ideal for rocky ground where you can’t dig deep 
  • Perfect for areas where a percolation area isn’t possible due to poor ground or small areas 
  • Where site conditions allow, the Tero can be buried.

Tricel Tero module dimensions (mm)


How many Tricel Tero modules do you need?

One Tricel Tero treatment module is designed for a single house unit with up to 6 PE.

1 Module
2 Modules
3 Modules
4 Modules
5 Modules
6 Modules
7 Modules
8 Modules
9 Modules

Tero prices and further information

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

Secondary Treatment or Sand polishing filters

Looking for a secondary treatment (further treatment after your septic tank), our Tricel Puraflo provides the ideal solution. Alternatively, if you are searching for a sand polishing filter, our Tricel Sandcel provides a dual function of polishing the effluent from a wastewater treatment system and disposing of the treated liquid into groundwater.


Tricel wastewater treatment plants are fully tested and accredited to European standards for CE certification. The Tricel Tero tertiary treatment system meets with EN12566-7 requirements which test both the quality of the components as well as the overall performance of the plant.

Certification CE Label
Certification ISO

Our range of products

Tricel Vento

Tricel Vento Septic Tank

Shallow dig tank, strong & robust underground tank, No electrical or moving parts. Ideal for sites with good drainage & plenty of space.

Learn more
Tricel Novo Domestic sewage treatment

Tricel Novo Sewage Treatment Plant

Durable & long lasting SMC tank, shallow dig tank, easy installation (Plug and Play), long life components.

Learn more
Tricel Maxus commercial wastewater treatment

Tricel Maxus Sewage Treatment Plant

Commercial plant. Submerged Aerated Filter (SAF) technology. Ideal for project over 50 PE.

Learn more
Tricel Tero tertiary treatment plant

Tricel Tero Tertiary Treatment

An eco-friendly and modular system with proven E.Coli Treatment capabilities in line with the new EPA requirements.

Learn more
Tricel Puraflo secondary treatment plant

Tricel Puraflo Secondary treatment plant

Ideal for sensitive sites, compliant to Irish Standard, small footprint.

Learn more
Tricel Sandcel sand polishing filter

Tricel Sandcel
Sand Polishing Filter

Provides a dual function of polishing the effluent from a wastewater treatment system and disposing it into groundwater.

Learn more
Pumping Solutions

Tricel Pumping Stations

Pump fluids from one place to another where gravity drainage cannot be used, easy and trouble-free installation

Learn more

50 years in business

A highly successful multinational corporation with over 50 years’ valuable industry experience


Plants available for all capacities, from 1PE up to 50PE. Free advice on request.

Fast Delivery

On-time delivery is a core requirement of our successful business operations

Meet our team

To find a technician in your area, visit our page


To speak to one of our agents online, click here


Request a free quote today to have a quote that meets your project!

8PE installation Essex

Recent projects with Tricel Novo IE 6 treatment plant

Extensive industry experience, manufacturing since 1973.

Tricel manufacture deliver & install sewage treatment plants across a wide range of industry sectors throughout Ireland & the UK. Tricel also provide import/export services for our international clients. Top quality material offers outstanding capabilities including long life, durability and is a cost-effective solution for sewage treatment even in the harshest environments.

Tricel has installed many of its Tricel Novo Sewage Treatment Plants across the UK.


Frequently Asked Questions

PE represents the initials of Population Equivalent. Population equivalent: conversion value which aims at expressing non-domestic applications in terms of domestic loading based on 1 person creates 60 g/day BOD5 and 150l/day. (Code of Practice: Wastewater Treatment and Disposal Systems Serving Single Houses (p.e. < 10), EPA)

Tricel Novo Vitae

 Both are wastewater treament plant solutions manufactured by Tricel. Wastewater treatment plants offer a superior quality of treatment. For example, the Tricel Novo comprises of three independent wastewater treatment zones and offers an average of efficiency of 95.9% BOD removal.
This is a higher treatment standard than the effluent from a septic tank. Please note: all wastewater treatment plants used in Ireland must comply with the EN12566-3 standard and all septic tanks must comply with the EN12566-1 standard..

Tricel Vento

The septic tank from Tricel is manufactured as a primary treatment. Designed for the settlement of your effluent. This product may need an additional treatment like the Sandcel or Puraflo.

Most Tricel products have a warranty. To discover all the guarantees on our products, as well as on the internal parts, consult our dedicated product pages.

The required standards are 20:30:20 BOD, SS, NH4. All Tricel produces exceed the requirements when tested to En12566-3 and comply with SR66.

Learn more about our certification

Tricel recommends that you maintain your device to the fullest. You are obliged by law to avoid all types of pollution or nuisances. Do not hesitate to contact us for more information on our service contracts. An annual maintenance contract may be offered.

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