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Waterless urinals and hygieneFeatured science projectScience project video

Observation

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.
 

waterless urinals science fair project

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Complexity level:
7
Project cost ($):
20
Time required:
1 day to prepare, 5 days for the science project experiment
Material availability:
Easily found
Safety concerns:

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.