The term “green energy” is used to designate renewable energies such as solar, wind or hydraulic energy. Thus, natural gas, a fossil fuel, cannot be qualified as green energy. Biogas, on the other hand, does indeed fall into this category, which is particularly popular in these times of ecological transition.
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[EN VIDÉO] HomeBiogas: this digester transforms organic waste into biogas Biogas is a good alternative to natural gas. It can be produced by fermentation of organic matter in a digester, such as HomeBiogas for example. Discover in video how this amazing installation works.
Like the oilthe natural gas results from the slow decomposition of microorganisms buried in layers of sediment. It is composed ofhydrocarbons — mainly methane (CH4) — naturally trapped in porous rocks.
the natural gas is however the fossil fuel that generates the least CO2. According to the French Environment and Energy Management Agency (Ademe), the combustion natural gas would, for example, be the source of theepisode by 0.206 kilogram of CO2 per kilowatt-hour of energy supplied, whereas gasoline, diesel, fuel oil home or the kerosene display values around 0.270 and the coal the 0.243.
The combustion of natural gas also emits virtually no sulphur dioxide (NA2), dust, soot or smoke.
Green gas sectors
Beyond natural gas per se, biogas appeared on the market more or less recently. They come from the fermentation — Where anaerobic digestion — of materials animal or vegetable organic matter in the absence of oxygen. When the biogas result from renewable sources such as sewage sludge or even the organic waste industrial, agricultural or household, they fall well into the category of green energies.
Thus, biomethane, which has the same properties as natural gas, can be injected directly into the distribution network. It can also be used as fuel. We then speak of bioNGV. It reduces CO emissions2 compared to fossil fuels. It can be produced locally; the ecological — and economic — gain is therefore all the greater. For example, according to GRDF, the waste produced for one year per 7,000 inhabitants could make it possible to produce the equivalent in fuel of the consumption annual from a bus.
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