Secondary Treatment

Traitement secondaire avancé (TSA) gravitaire
Secondary Treatment 1

Are you interested in this type of installation?

Let one of our experts in System O)) septic systems advise you.

Secondary Treatment 1

The System O)) secondary treatment solution is a reliable approach to protect the water in your well.

Traitement secondaire avancé System O))

The basis of all treatment systems

The System O)) secondary treatment solution is a reliable approach to protect the water in your well.

Installed within a waterproof membrane, this System O)) solution can also collect water at the outlet of the septic system and discharge it into a sewer or watercourse (where permitted by regulations)



All our wastewater treatment solutions are eco-friendly and safe for the environment, as demonstrated during benchmarking tests around the world.


Worry-free solutions that have no moving parts, no build-up or clogs, and that do not require power or filtering media replacement!


The technology exists since 1987; systems installed over 30 years ago are still functional, in perfect condition and treating wastewater just as efficiently as the day they were put in.

Choosing the right septic system isn't always easy

Secondary Treatment 3

Download our BEFORE BUYING guide to help you select a cost-effective, eco-friendly and long-lasting wastewater treatment solution, combined with your septic tank. The price varies according to the type of system your site requires, determined by a percolation test.

This guide provides support in a 3-step list to get your wastewater treatment project started on the right foot.

Système de distribution & d'infiltration (SDI)


No power required

No usage costs, no wires to install or protect

No mechanical parts

No wear or need to replace parts

No need to drain pipes or replace filter media

This increases the sustainability of the system and lowers costs in the medium term

Smaller installation

± 50% less surface area compared to a conventional septic system

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Onsite Residential Wastewater Treatment Technologies, standard applied in Canada and managed by the BNQ;

Standalone Wastewater Treatment Systems for Isolated Isolated dwellings, standard applied in the province of Québec, in Canada and managed by the BNQ (Bureau de normalisation du Québec – Quebec Standards Bureau)

Wastewater Treatment by Compact Filter Process, approval from the Commission mandated to provide approvals (Commission Chargée de Formuler des Avis Techniques – CCFAT) from the Scientific and Technical Centre – Construction Industry (Centre scientifique et technique du bâtiment – CSTB), standard in effect in France;

Residential Onsite Systems, standard applied in the U.S.A. and managed by the National Sanitation Foundation;
(European conformity – Conformité Européenne) CE marking allows a product to be distributed freely across the European Union.

Small autonomous domestic wastewater treatment systems up to 50 residents, standard in effect in Europe and managed by the CEBEDEAU – Centre d’expertise en eau de la Belgique (Belgium’s Water Authority);