For many years now, Biofos has been using Copenhageners' wastewater to produce CO2-neutral biogas. It mixes Hofor into the city gas, where it replaces fossil natural gas. Hofor has recently inaugurated a test plant where, with a brand new technology, significantly more biogas can be obtained from the wastewater. The utility company states this in a press release.
The test plant is built at Biofos' Avedøre treatment plant, where wastewater from western and southern Copenhagen is turned into biogas. The new test plant is the first in Denmark where biogas from wastewater is included in a so-called Power-to-Gas plant. Over the next year, the plant will be thoroughly tested, and if everything goes as planned, Hofor will decide to build a large-scale plant by then.
- This is green energy innovation at its best. We use completely new technologies so that we can streamline processes and significantly increase the amount of biogas from wastewater plants. In this way, we are clearly contributing to the green transition – for the benefit of the climate, the people of Copenhagen and the rest of Denmark, says the head of Bygas in Hofor, Morten Stanley.
The new method can therefore create more biogas from the same amount of wastewater. If the test plant works, it will mean that Hofor can ensure that the city gas will be 100 percent CO2-neutral.
- We have agreements to purchase biogas from all three treatment plants in the capital. Copenhageners' own wastewater is thus converted into biogas, which is mixed into the city gas and sent back to Copenhageners. It is recycling that matters. Our plan is to deliver 100 percent CO2-neutral city gas in 2025, says Morten Stanley.?
City gas in Copenhagen currently consists of 65 percent biogas and 35 percent natural gas. If the new method works, a new full-scale plant will be ready in 2027.
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