Effect of Ozone on Microbiological Growth (Comparison)
 
Test Parameter Unit Deionised water, without ozone treatment Deionised water *with ozone treatment
- - 0 min 30 min Growth rate 0 min 30 min Growth rate
Total Bacterial Count @ 37° C for 48 hours cfu/ml 1.0x107 2.4x107 +140% 1.1x107 2.8x106 -75%
E.coli per g. (MPN) cfu/ml 6.2x106 8.4x106 +35% 5.4x106 1.6x106 -70%
Coliform per g. (MPN) cfu/ml 8.2x106 1.1x107 +34% 5.6x106 4.0x106 -28%
Salmonella in 25 ml - 8.0x104 1.1x105 +38% 8.5x104 7.0x104 -18%

The above microbiological tests were carried out on the 0 minute and 30 minute sample after the addition of cultured bacteria to determine the growth rate in normal and ozone treated deionised water. The above results showed a reduction in microbiological testing on the deionised water with ozone treatment.

*The ozone treatment was carried out in 3 litres of water for 30 minutes using a Pure`n´Clean Multi-Functional Ozone Generator.