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How does a domestic sewage treatment plant work?

How does a domestic sewage treatment plant work?

One common question when people start investigating the topic of wastewater treatment is “how does a domestic sewage treatment plant work?

The Tricel Novo is a domestic sewage treatment plant. It treats and cleans your wastewater using the innovative fixed bed process that allows the bacteria to grow and to degrade the pollution from the effluents. The fixed bed is powered by oxygen thanks to the compressor. It requires less energy to run than a lightbulb, keeping costs at a minimum.

This type of wastewater treatment application is known for its excellent purification performance along with its positive behaviour with load variations. Load variations can be of particular interest when choosing a system for a holiday home, B&B or house that must take into account seasonal factors. Thanks to the self-regulating process which is built into the Tricel Novo the system can self-treat load issues. This regulating process consists of a bacterial bed combined with a sludge recirculation system.

By developing a wastewater treatment plant that is self-regulating, end-users no longer have to worry about factors such as extended periods of underload, seasonal overloads or even periods of no load. This innovative system ensures that no matter the frequency of use, the bacteria which breaks down the wastewater will not degrade.

Tricel Novo wastewater treatment plants are high-quality products designed to be reliable, simple to maintain and easy to install by professionals. However, if trying to understand how does a domestic sewage treatment plant work. Then we must begin to further analyse the individual elements involved in the Tricel Novo system.

What is so particular about the fixed bed process?

The first thing to examine when trying to understand what interior elements make a domestic sewage treatment plant work, such as the Tricel Novo, is the individual treatment stages of the process.

The primary settling chamber

This settling chamber is the first step in the purification process. In the primary settling chamber any heavy elements of sludge and effluent are deposited at the bottom of the tank chamber. As a result, the removal of the majority of pollution from the greywater takes place before entering the second phase of the purification process.

This step is not always taken up in free crop operation. It is altered for SBR (sequence batch reactor) stations that combine the first and second purification stages into one.


Aeration phase

The second phase of the process introduces oxygen into the tank. This allows the all-important bacteria to grow and develop. This bacterium is what consumes the harmful waste, and as an organism, it requires oxygen to thrive.

Oxygen is supplied through a small compressor which is extremely energy efficient and has very low running costs.


Final settling chamber

Finally, as the process nears completion, any residual sludge settles to the bottom of the tank as its mass is denser than water. This function allows for final separation following the aeration stage and the cleaning work undertaken by the bacteria. Once final separation is complete, the water purification is now compliant with environmental standards. They can be evacuated from the tank and re-introduced to the natural environment.

All sewage treatment solutions manufactured by Tricel are tested and certified for structural strength, water tightness, durability and treatment efficiency, adhering to European Standard EN12566- 3.


We hope that this information has helped to answer your query on how does a domestic sewage treatment plant work.

If you require more information about the Tricel Novo system or any other products within our extensive range, contact our sales team directly. You can also view our brochure section for further technical information.


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