Can an airplane's toilet tank fill up and overflow?
The toilets on the planes store in-flight excrement in tanks and empty them when they return to the airfield. The travel-related data site 'Travel Stats Man' is considering whether the toilet tank will overflow by the time it reaches the airport, based on the data.
Airports Had to Deal With Over 2 Billion Litres of Airplane Toilet Waste in 2019 --Travel Stats Man
According to healthline, a health-related website, if you drink 2 liters of water a day, your daily urine output will be 800-2000 milliliters. Travel Stats Man speculated that this data was 'when waking up for 16 hours' and estimated human urine output to be 50-125 milliliters per hour.
Below is a graph of human urine output per hour. The red line shows the amount of urine when 125 ml of urine is excreted per hour, and the blue line shows the amount of urine when 50 ml of urine is excreted per hour. Since Travel Stats Man has a typical long-haul flight time of 6 to 11 hours, we calculated the maximum urine output per person on an airplane as 1375 ml at 11 hours.
The general number of seats, toilet tank capacity, and toilet tank capacity per passenger of each aircraft summarized from the data sheets of ' Boeing 747-400 ', ' Boeing 787-8 ', and 'Airbus A380' are as follows. From this result, it can be seen that even if all passengers excrete the maximum amount of urine (1375 ml), the capacity of the tank is sufficient.
| Boeing 747-400 | Boeing 787-8 | Airbus A380 | |
| General number of seats (people) | 416 | 467 | 525 |
| Toilet tank capacity (liter) | 1135 | 1628 | 2096 |
| Toilet tank capacity per passenger (liter) | 2.73 | 3.49 | 3.99 |
Also, assuming that the average flight time of airplanes around the world is 4 hours, 200-500 milliliters of urine per person will be excreted during the flight. In this case, it is calculated that Guangzhou Baiyun International Airport, which was used by 2,572,000 passengers in April 2021, collected 514,400 to 1,286,000 liters of urine per month. In addition, according to the International Civil Aviation Organization (ICAO) , the number of passengers worldwide in 2019 reached 4.5 billion, so in 2019 airports around the world will have 900 million to 2.2 billion liters. It means that the urine has been collected.
Based on the above calculation results, Travel Stats Man said, 'Over the world, the annual excretion urine volume of airplanes is estimated to be 900 million to 2.2 billion liters. Despite this amount of urine, airplane waste tanks You won't reach capacity. '
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in Ride, Posted by log1o_hf