Some waste they cannot be recycled, so specialized companies just store them in landfills. The result? Piles and piles of garbage. Alternatively, these waste are placed in the so-called "waste-to-energy plants ", too bad that the burning of waste releases gas e produces ashes released into the air, ashes harmful to human health and the environment. THE waste could be an excellent resource, researchers should only develop a system for obtaining energy from waste without major side effects. Researchers from the University of Lund in Sweden have done it, they have developed a technology capable of produce hydrogen give her waste ashes.
The process developed by the Lund University team seems to have great potential, one is estimated production of hydrogen equal to 20 billion liters of gas per year, translated into energy terms we are talking about an annual production of 56 gigawatt hours (GWh) of electricity. With 56 GWh of electricity it could meet, for a whole year, the energy requirements of about 11,000 homes.
In recent years, hydrogen gas is emerging among the potential sources of energy, there are difficulties in the hydrogen storage but new technologies are breaking down these limits, as well as for the transportability of gas. In Europe the waste combustion is very popular with a large amount of ashes produced and dispersed in the atmosphere.
There ash produced by the waste combustion it can prove to be a fundamental resource leading to the generation of hydrogen gas. The studies were conducted by the team of researchers of Aamir Ilyas, PhD in Water Resources Engineering at the University of Lund who explains "the ash, instead of being released into the air as it currently happens, can be used as a resource through which to produce hydrogen gas. With this technique, our waste ash deposits have become a gold mine ". The technique is simple, the waste ash is placed in an oxygen-free environment. It is the humidity that manages to release hydrogen gas. The gas is sucked through pipes and stored in tanks. At the end of the process, a much lighter ash will have formed.