The Italian company CDA (Cattelan Distributori Automatici), which offers more than six tons of coffee per month for about 1600 machines it manages, started a project in collaboration with the University of Udine and in particular with the Blucomb, company that resulted from it, specializing in the production and use of plant design, to convert the coffee grounds into biofuel and fertilizer.
The coffee is one of the most favourite beverages in the world, registering in Italy a consumption of 3.4 billion cups. Apart from the flavour and its many health benefits, coffee can become an interesting source renewable thanks to its lees.
This collaboration came to the discovery that the coffee grounds, for its consistency, are perfect for processing into 'pellets'. They weren’t found on its inner heavy metals, making it therefore suitable for use as fertilizers for plants. With a gross calorific value of the wood, they become equally suited to obtaining energy.
In the U.S., a team of researchers from the University of Cincinnati is also working on producing biofuel from coffee waste. Biodiesel produced from coffee grounds burn cleaner than petroleum-based fuel, releasing less carbon dioxide hydrocarbons and particulate form.
Source: Hostel Vending Portugal