Home > FAQ

Frequently Asked Questions

What is a wastewater treatment plant?

A wastewater treatment plant collects sewage from residents, businesses, and rain water. The plant treats the sewage and releases the treated water back into the natural environment.

What is AQUIRIS?

AQUIRIS, a branch of the international group VEOLIA, was founded following a call for tender issued by the Brussels-Capital Region for the design, construction and operation of a wastewater treatment plant in Brussels-North for a period of twenty years. This plant treats the wastewater produced by 1.4 million inhabitants. Operations started in March 2007.

Why should we treat wastewater?

Wastewater generally has two origins:

  • Domestic wastewater, which is divided into grey water (water from sinks, showers, wash machines, etc.) and black water (water from toilets).
  • Industrial wastewater coming from companies' operational activities.

Depending on the type of sewage network, rain water may also mix with these two types of water. The wastewater thus carries an amount of pollutants, which can be harmful to the flora and fauna. This is why it has to be treated before being returned to the environment.

How does a wastewater treatment plant work?

The wastewater undergoes two different types of treatment processes:

  • A mechanical treatment in order to remove solids, grit and oil from the water.
  • A biological treatment in order to remove organic pollution.

What do you do with the residue from the sludge treatment?

The sludge generated by the wastewater de-pollution process is put through a special treatment that enables the final residue to be recycled or sent to landfill.

How do you collect wastewater?

Wastewater is collected through a sewage network. It is then channeled through large collectors to the wastewater treatment plant where it is depolluted before being discharged into nature (generally a river).

How can I contact AQUIRIS?

Avenue de Vilvorde, 450
1130 Bruxelles
Tel. : +32 (0)2 243 96 60
Fax : +32 (0)2 216 74 94

Visit the plant

Guided tours of the Brussels-North wasterwater treatment plant are organised upon reservation.