Technology The weekend science ticket. Transforming our waste into renewable energy: anaerobic digestion

The weekend science ticket. Transforming our waste into renewable energy: anaerobic digestion




An anaerobic digestion plant. (Illustration) (JEAN-LUC FLEMAL / BELGA MAG / AFP)

According to ADEME, the ecological transition agency, a French person produces 350 kilos of waste per year, a third of which is organic. When fermented, they produce biogas composed of methane and CO2, a renewable thermal energy! Naskeo Environnement specializes in anaerobic digestion.

We build factories that allow farmers, manufacturers and communities to transform their waste and produce green gas, renewable gas.

Aurélien Lugardon, creator of Naskeo

A farm produces methane gas from cow excrement, in Moussonvilliers (Orne), January 24, 2016.
A farm produces methane gas from cow excrement, in Moussonvilliers (Orne), January 24, 2016. (MAXPPP)

The methanization of 15,000 tonnes of organic waste is equivalent, over a year, to fueling 60 buses, or electricity for 1,300 homes or even heating 700 homes, all while reducing CO2 emissions by 80%.

When you ferment livestock effluents, that is to say manure or slurry, in the open air without introducing them into an anaerobic digestion unit, they emit methane, a much more greenhouse gas. impacting than CO2. So here you have a double impact: production of renewable energy, and reduction of methane emissions.

This fermentation without oxygen, known as “anaerobic” also produces a compost, the “digestate”, used as fertilizer by the farmers. Today there are more than 500 anaerobic digestion facilities in France. “Today, it is still marginal, emphasizes Aurélien Lugardon, 1% of the gas circulating in the market is renewable gas, and this is doubling each year. In 2030, we will be at 10%, and in 2050, we hope to do without imported gas and only use renewable gas. ”

This rapidly expanding sector can replace our fossil fuels, which still occupy 81% of the current energy market.

Combining energy production and recycling of waste, and in particular bio-waste, as Naskeo is doing, is a solution for the future to reduce our emissions and our waste flows. It is also committing to a more sustainable world, which is why we are supporting these innovations with ADEME, the agency for ecological transition of the French Republic.

Arnaud Leroy, President of ADEME

The Grand-Nancy water treatment plant, in Maxéville, on September 4, 2019. Construction work on two new sewage sludge digesters is underway in 2021 to install two anaerobic digestion units to produce biogas . & nbsp;
The Grand-Nancy water treatment station, in Maxéville, September 4, 2019. Construction work on two new sewage sludge digesters is underway in 2021 to install two anaerobic digestion units to produce biogas. (CEDRIC JACQUOT / MAXPPP)

To read

Knowledge of energies: anaerobic digestion

Methanisation (production of biogas and digestate): explanations (connancedesenergies.org)

Methanization – Ademe

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