Biogas is produced in a fermenter during the fermentation of biogenic waste. Biogas is used to produce electricity and heat in cogeneration plants. The electricity generated is fed into the public power grid. A small portion of the generated heat energy is used to heat the fermenter. The remaining heat can be fed into a district heating network. The biogas produced in the fermenter can also be fed into the public gas grid after an additional treatment step and then used in households or for our mobility.
About one third of all waste in Switzerland is organic. By recycling biowaste, the substances and energy it contains can be used. Thanks to the collection of green waste, waste management becomes resource management. Recycling in the form of fermentation has proven its worth for over 20 years - it is the ecologically and economically sensible solution for garden waste, kitchen waste and leftover food.
Collecting and recycling organic waste is worthwhile. So put your waste where it belongs - in the organic waste container!
Axpo has been active in the sustainable recycling of biowaste for over 20 years and has experience and know-how in all areas from waste separation to green waste collection, processing, energy production and fermentation. We complete nature's cycle by recycling valuable materials to create energy and resources for future generations.
According to the Federal Office for the Environment, Switzerland produces around 3.55 million tonnes of food and green waste per year. Useful recycling recovers energy and completes the ecological cycle.
In its 15 biogas plants and at five composting sites, Axpo processes around 260,000 tonnes of biomass per year, producing an energy volume equivalent to the electricity consumption of the city of Biel with its 56,000 inhabitants.
The temperature in the biogas plant is a constant 55° Celsius. This enables the microorganisms to develop and function ideally during solid fermentation. Biomass ferments for about 14 days. Thanks to the high temperature, the material is reliably hygienised and weed seeds are destroyed.
In addition to biogas, electricity and heat, one tonne of organic waste produces around 90 % or 900 kg of nutrient-rich natural fertilizer in solid and liquid form during the fermenation process. It is spread on agricultural fields, completing the biogas ecological cycle.
Private customers can purchase the natural fertiliser on our sites. Bring your packaging with you and fill your natural fertiliser yourself.