Grand Junction, a city in Colorado in the United States, turns wastewater into fuel for 40 of its municipal vehicles. The project will bear fruit in 7 years, so the city will be very profitable.
When we talk about renewable energy sources, there is a fuel that we often overlook and we have it right under our noses. Human waste, collected and processed in wastewater treatment plants, is an inexhaustible raw material, it can be used to produce natural gas that we can use as fuel for cars, to produce heat and electricity.
Many municipalities use anaerobic digestion To convert its waste into raw biogas, but normally burned in a flare, it is considered a low-emission method to remove methane and other gases. To take advantage of this fuel, we must add to the process biodigesters.
To their knowledge, it is the only municipal wastewater treatment plant in the United States to produce biogas for use as vehicle fuel. A fuel that powers 40 municipal vehicles, including garbage trucks and buses.
In Europe, there are around 282 factories, spread across 15 countries, a system widely used in Germany and Sweden.
Approximately $ 2.8 million has been invested in the project over the past 10 years. The project will pay for itself in seven years and the fuel “free” from the eighth year.
Via The Guardian
Images via the city of Grand Junction