On the occasion of World Environment Day, Emirates is showcasing an environmentally friendly aircraft cleaning technique that has enabled the airline to save millions of liters of water every year. Emirates uses the “aircraft drywash” technique to clean its aircraft. As indicated by the name, little or no water is involved in cleaning the aircraft, which is in contrast to conventional methods of aircraft cleaning which typically use thousands of liters of water per wash.
During the course of every flight, an aircraft accumulates dust and grime on its external surface. In addition to making the aircraft look dirty and less appealing, the dirt also increases the fuel it consumes by making the aircraft heavier and less aerodynamic. Traditionally aircraft are cleaned by using highly pressurised water between four to five times every year. However, on an average this technique uses more than 11,300 liters of water to clean one Airbus A380 aircraft and more than 9,500 liters of water to clean a Boeing 777 aircraft every time.
Since early 2016, Emirates has been using an aircraft drywash technique to clean its fleet of over 250 aircraft. In this technique, a liquid cleaning product is first applied manually to the entire external surface of the aircraft. Clean microfiber fabric is then used to remove the cleaning product which has dried to a film, removing the dirt along with it and leaving the aircraft clean and polished. The aircraft is left with a fine protective film allowing the painted surface to retain a longer gloss and shine. It takes a crew of 15 staff about 12 hours to clean an A380 and about nine hours to clean a Boeing 777 aircraft.
There are multiple advantages to using the drywash technique. The first is that there is little use of water to clean the aircraft. When consolidated over its fleet of 260 aircraft, Emirates saves over 11 million liters of water every year. Additionally the waterless aircraft wash technique ensures that the aircraft remains cleaner for a longer period of time thereby reducing the number of times the aircraft has to be washed to about three times a year, and also reducing the aircraft’s fuel consumption because of less accumulation of dirt.

Source: Arab News