Waterless urinals and hygiene
The results show that petri dishes in Group A which contain samples from waterless urinals have a smaller amount of bacterial growth compared to petri dishes in Group B which contain samples from water based urinals.
|Petri dish||bacteria growth (mm)|
|Day 1||Day 2||Day 3||Day 4||Day 5|
|A1 - waterless||0||2.5||6.7||9.8||15.7|
|A2 - waterless||0||2.4||4.8||8.2||11.4|
|A3 - waterless||0||3.9||6.9||11.2||17.3|
|A4 - waterless||0||2.6||5.3||9.3||13.9|
|A5 - waterless||0||3.5||5.5||9.8||14.8|
|B1 – water based||5.2||11.7||22.4||31.8||43.7|
|B2 – water based||3.4||11.7||19.9||28.4||39.8|
|B3 – water based||6.1||13.8||25.7||37.5||48.6|
|B4 – water based||4.3||15.3||28.4||41.4||54.8|
|B5 – water based||3.7||12.3||23.5||35.9||47.3|
The graph below represents the results of our science experiment.
The agar in the Petri dishes should be properly disposed of and the Petri dishes decontaminated after the experiment. This can be done by washing the Petri dishes with bleach.