From Old to Extraordinary

Propulsion from coffee filters: In 2017, some of London’s famous red buses began filling up with a fuel mixture derived from coffee grounds.

A Portuguese clothing company is profiting from the use of automotive products as raw materials for its shoes. The fashion brand attracted attention when it brought out sneakers whose outer material was made from recycled airbags. It recycles plastic bottles on a separate PET line. The soles of shoes can already be made from materials used in recycled tires. This is enabling the environmentally conscious brand to engineer an extraordinary comeback for its products. A female entrepreneur in Ethiopia has also begun manually producing shoes that are partly made from old truck tires. The striking shoes are mainly exported and have even made it to the fashion metropolis of New York.

A very special kind of recycling has come into play in the production of fuel for buses. In late 2017, some of the famous red London buses began to run on a biofuel mixture derived from coffee grounds. A British company goes around the country collecting the remains from the coffee machines at cafés and cafeterias and then combines them with fats and oils to create an innovative biodiesel.

Airplanes can even take flight with the help of a special biofuel. That is at least what an international team of researchers demonstrated in 2017. They started out with sour whey, which is a waste product from the production of yoghurt and the acid-set cheese known as quark. Then they extracted a purely biological oil that can be further processed into fuel for aircraft. The process does without expensive chemicals. Bacteria cultures are merely added to the sour whey in two bioreactors heated to different temperatures, which makes it possible to recycle the substance into a valuable material. In October 2021, Airbus made it all a reality. For the first time, one of its airplanes took off on a test flight totally propelled by sustainably-produced jet fuel. In this case, the sustainable aviation fuel, which consisted of waste cooking oil, powered a three-hour flight.