Pollution in Geneva –
SIGs will lock CO₂ in concrete
The Geneva Industrial Services project aims to capture CO₂ on the Aïre STEP site and recycle it in concrete. A first in French-speaking Switzerland.
Published today at 11:37 a.m.
CO2 CAPTURE EQUIPMENT
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- SIG has launched a CO2 capture pilot project in Geneva.
- neustark transforms the captured CO2 into limestone integrated into recycled concrete.
- The project could avoid 1,500 tonnes of CO2 emitted per year.
Geneva Industrial Services (SIG) built a pilot project to capture CO2 on the site of the Aïre wastewater treatment plant (STEP), in order to recycle it in concrete. The ingenious system, developed by neustark, a company founded in Bern, captures carbon dioxide, recovers it and then stores it in recycled concrete. The project is a first in French-speaking Switzerland.
The solution patented by neustark creates a virtuous circle based on the circular economy model. According to SIG, this pilot project will “avoid emissions of 1,500 tonnes of CO₂ per year from the SIG biogas station at the Aïre STEP”.
“The originality of this project consists of storing CO2 sustainably, locally and simply in construction materials,” indicates Frédéric Schulz, director of drinking water and gas at SIG. We are eliminating pollution, CO2 emissions, which is good for the climate and the environment.”
CO₂ issu du biogas
To do this, the CO2 is captured at the outlet of the SIG biogas treatment station, at the Aïre wastewater treatment plant. It is then liquefied to be transported to a Neustark facility. The carbon dioxide thus captured is then injected into concrete aggregates coming from demolished buildings or into other mineral waste.
The CO2 is transformed into limestone and permanently bound to concrete granules which can be used for the manufacture of recycled concrete or for road construction.
Founded in Bern, neustark was the first company to commercialize the removal of carbon by mineralization in demolition concrete. It currently has two CO2 sources and 18 storage facilities in Switzerland, Germany and Great Britain.
With GIS, the company will be able to supply its installations in French-speaking Switzerland and Geneva, but also future installations in neighboring France. Neustark’s objective is to sustainably eliminate one million tonnes of CO2 by 2030.
An assessment of this pilot project will be drawn up after three years. If it is conclusive, SIG will then deploy these installations as part of the renovation of the Aïre wastewater treatment plant. The actions implemented by SIG as part of its Climate Pact aim to avoid the emission of 500,000 tCO2 by 2030.
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Judith Monfrini is a journalist for the local section. With a legal background, she obtained her diploma from the Journalism and Media Training Center (CFJM) in 2015. She worked for more than ten years for the Médiaone group. (Radio Lac, One fm)More info
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