sewage treatment plants
Domestic sewage treatment plant
The technologies used, how does a sewage treatment works, features and benefits, costs, certifications and warranties.
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Tricel Novo sewage treatment plant in details


Tricel Novo is part of the Tricel sewage treatment plant range certified to CE12566-3. It has been developed to meet a need for efficient and compact sewage treatment solutions for domestic wastewater. Indeed, the installation of a drainage field is not always possible due to site constraints such as space (a lack of) and/or soil (clay soil, for example, might not have a sufficient soakaway potential).

Moreover, with the 2020 changes to the septic tank regulations in England and Wales, upgrades of existing septic tanks discharging directly to a watercourse are mandatory. Compact wastewater treatment plants such as the Tricel Novo represent cost-effective solutions to such upgrades.

Let’s now see how a wastewater treatment plant works and what processes are used?

If you require further information about Tricel Novo

How does a sewage treatment plant work?

The Tricel Novo has three separate compartments in its tank:

Stage 1: the primary settlement chamber

In the first stage of sewage treatment, anaerobic breakdown takes place in the primary settlement chamber. The wastewater is introduced and the solids drop to the bottom, becoming separated from the liquid.

Stage 2: the aeration chamber

The next stage of the wastewater treatment involves aerobic breakdown. This takes place in the aeration chamber, where masses of naturally occurring bacteria inhabit specially designed filter media. These bacteria are sustained with air, which is continuously supplied from a purpose-built pump in the unit’s top section. As the liquid flows slowly through the filter media, the bacteria feed on the waste and remove it from the liquid.

Stage 3: final settlement chamber

In the last stage of wastewater treatment, the liquid flows from the aeration chamber into the final settlement chamber. Suspended sludge consisting of bacteria is carried with the liquid into the settlement chamber and settles to the bottom of the chamber. From there, a continuous sludge return system pumps it back to the primary settlement chamber. The remaining treated liquid now meets the required standard to be safely passed out of the Tricel system.

Once the process is complete, the treated liquid now meets the required standard and can be discharged from the tank via the outlet.

How does a Tricel Novo sewage treatment plant work?

The technology used.

Fixed culture

First of all, Tricel designed the Tricel Novo with a fixed culture treatment process. What is fixed culture, you may ask? It is the process used to create a base of development for the bacteria present in the tank. The bacteria multiply until they reach an optimum level for the treatment of your sewage water. To achieve this, Tricel uses a bacterial honeycomb carrier. The optimum is reached depending on the volume of wastewater to be treated by the treatment unit.

For example: for a Novo UK6, the number of bacteria in the tank will not be the same as if there are two or if you are four occupants in a house.

What happens if the number of inhabitants changes?

The number of bacteria will then adapt to best treat your wastewater (within the limits of the tank). This is particularly the case when you receive friends or family during the holidays.

The opposite is also true when the sewage treatment plant is no longer “fed” with wastewater, the number of bacteria decreases. For example, when you go on holidays for several weeks, the number of bacteria will be reduced. On your return, it is, therefore, advisable to pour into the toilet, a packet of biological activator or an old yogurt. This will help the number of bacteria to increase rapidly.

Key features & benefits

► Compression moulded SMC tank. The compression moulding process is one of the most technologically developed processes available to manufacture structural composites. Components are manufactured under heat and high pressure and have unrivalled strength and durability over standard GRP tanks or PE tanks.

 SMC is unique in the wastewater treatment industry with Tricel SMC tanks operating in some of the harshest climatic conditions for over 50 years with no defects.

 Tricel’s ceramic diffuser is unique in the domestic wastewater treatment plant market and will last twice as long as all standard competitors rubber equivalents. This saves money in both call out fees and replacement parts.

► No concrete backfill for installation on most sites saving up to €400 over lower quality grp/plastic competitors.

► No moving parts or pumps in the plant ensuring reliable operation and minimal maintenance and repair costs.


How much does a sewage treatment plant cost?

What is the price of a Tricel Novo? With or without installation?

Product price only

The price of our products may vary according to several criteria:

  • The size of the tank needed
  • The region/area you leave in
  • The options chosen (pump or gravity for example)

As a guideline, please see below the prices of a Tricel Novo.

Tricel Novo typePrice range
Tricel Novo UK6 (1-6 PE)£1850 - £2000
Tricel Novo UK8 (2-8 PE)£2315 - £2400
Tricel Novo UK10 (3-10 PE)£2480 - £2520

All the prices above are indicative only. They may vary depending on your area, site conditions and options required. Contact us to request a bespoke quote.

Price with installation

The price with installation is always difficult to determine without a prior site visit. Indeed, each project is unique and several criteria come into play.

  • Do you need to have your old tank removed?
  • Do you have your own digger?
  • Would you like a price with delivery? With installation? With landscaping?

The best way to get a price for your project is to request a quote. When you request a quotation or price on our site, we adapt to your needs and your project.

Get a price for your project

What size sewage treatment plant do I need?

The most common model on the UK market is the Tricel Novo UK6, designated by Tricel to meet the needs of homes from 1 to 6 people.

In order to know what size wastewater treatment plant you need, you must find out how many people your dwelling can accommodate.

Following the British water flows and loads 4, the following applies:

Number of bedroomsMinimum PETricel Novo Recommendation
Property with 3 bedroomsminimum 5 PE systemTricel Novo UK6
Property with 4 bedroomsminimum 6 PE systemTricel Novo UK6
Property with 5 bedroomsminimum 7 PE systemTricel Novo UK8
Property with 6 bedroomsminimum 8 PE systemTricel Novo UK8

How to request a quote for a sewage treatment plant?

  1. Fill in a contact form on our website
  2. A member of our technical team will contact you
  3. We will study your project
  4. We might schedule a site visit to verify the site
  5. A bespoke quote is sent to you
Request a bespoke quote for your project

Is the Tricel Novo certified?

Tricel’s Novo sewage treatment plants are tested and are certified to the European certification CE12566-3.

The certification tests each plant for strength, water tightness, durability and treatment efficiency. By using a wastewater treatment plant which is CE certified, you can rest assured that it has complied with tests and inspections which guarantee a high level of security and efficiency.

What are the warranties?

The warranties on the Tricel Novo in the UK mainland are as follows:

  • 3 years on mechanical parts
  • 20 years on the SMC structure
Key Features


Strong, lighweight and easy to install SMC tank

Fast delivery

UK manufactured ensuring short lead time


Tricel Novo is certified to EN12566-3

Get in touch

Tricel Environment UK

A trading brand of Dewey Waters Ltd.
Heritage Works, Winterstoke Road, Weston-super-Mare, BS24 9AN, United Kingdom.
Tel: +44 (0)1934 422 311