Building Off the Grid: Alaska Range is the 2nd spin-off from the original DIY series "Building Off the Grid". Ana and Jacob White and their two small kids are a modern-day Swiss Family Robinson, building an off-the-grid cabin on the Alaska Range. With all of their materials needing to be transported by snowmobile, this adventurous couple will have their work cut out for them as they create an entire home with no utilities available. And with the unpredictable Alaskan weather, not to mention aggressive wildlife, this family will be racing against the seasonal clock to get the cabin done before the dead of winter.
Runtime: 60 minutes
Building Off the Grid: Alaska Range - Biogas - Netflix
Biogas typically refers to a mixture of different gases produced by the breakdown of organic matter in the absence of oxygen. Biogas can be produced from raw materials such as agricultural waste, manure, municipal waste, plant material, sewage, green waste or food waste. Biogas is a renewable energy source. Biogas can be produced by anaerobic digestion with methanogen or anaerobic organisms, which digest material inside a closed system, or fermentation of biodegradable materials. This closed system is called an anaerobic digester, biodigester or a bioreactor. Biogas is primarily methane (CH4) and carbon dioxide (CO2) and may have small amounts of hydrogen sulphide (H2S), moisture and siloxanes. The gases methane, hydrogen, and carbon monoxide (CO) can be combusted or oxidized with oxygen. This energy release allows biogas to be used as a fuel; it can be used for any heating purpose, such as cooking. It can also be used in a gas engine to convert the energy in the gas into electricity and heat. Biogas can be compressed, the same way as natural gas is compressed to CNG, and used to power motor vehicles. In the United Kingdom, for example, biogas is estimated to have the potential to replace around 17% of vehicle fuel. It qualifies for renewable energy subsidies in some parts of the world. Biogas can be cleaned and upgraded to natural gas standards, when it becomes bio-methane. Biogas is considered to be a renewable resource because its production-and-use cycle is continuous, and it generates no net carbon dioxide. As the organic material grows, it is converted and used. It then regrows in a continually repeating cycle. From a carbon perspective, as much carbon dioxide is absorbed from the atmosphere in the growth of the primary bio-resource as is released, when the material is ultimately converted to energy.
Building Off the Grid: Alaska Range - Key processes - Netflix
There are two key processes: mesophilic and thermophilic digestion which is dependent on temperature. In experimental work at University of Alaska Fairbanks, a 1000-litre digester using psychrophiles harvested from “mud from a frozen lake in Alaska” has produced 200–300 liters of methane per day, about 20%–30% of the output from digesters in warmer climates.
Building Off the Grid: Alaska Range - References - Netflix