To Close or Not to Close?
should you close the toilet lid before flushing? A team of researchers from Japan's National Institute of Advanced Industrial Science and Technology (AIST) decided to tackle this riddle scientifically.
Their experiment involved studying the behavior of droplets and aerosols (tiny airborne particles) during a toilet flush. They found that with the lid open, droplets flew up to 50 centimeters and aerosols lingered in the air for tens of minutes. Closing the lid significantly reduced the spread of aerosols, although some leakage occurred towards the front of the toilet.
Further analysis revealed that when the lid was closed, about one-third of the simulated viruses adhered to the walls and underside of the toilet seat. While this amount was small, the researchers recommend wiping these surfaces for thorough cleaning.
However, the researchers emphasize that even without closing the lid, Japanese toilets are generally well-maintained for hygiene. They hope their findings will contribute to improved hygiene awareness and management in public restrooms.
This study, presented at an international conference in November, provides valuable insights into the dynamics of toilet flushing and offers practical recommendations for maintaining a hygienic environment.