Table 1 Summary of standardized collimated beam experiment using 5 % diluted metalworking fluid (MWF)
From: Determination of the effectiveness of UV radiation as a means of disinfection of metalworking fluids
Incident irradiance (I 0) | 129 μw/cm2 | ||||
|---|---|---|---|---|---|
Average irradiance (I a) | 36.7 μw/cm2 | ||||
Absorbance (abs) | 4.55 at 254 nm | ||||
Transmittance | 0.0000316 (10−abs) | ||||
% Minimum dose | Dosea (mJ/cm2) | Exposure time (s) | P. fluorescens concentration | Average concentration | Log reduction |
0 | 0.0 | 0 | 1.20E + 07 | 1.23E + 07 | 0 |
0 | 0.0 | 0 | 1.25E + 07 | ||
0 | 0.0 | 0 | 1.25E + 07 | ||
30 | 9.0 | 245 | 8.00E + 06 | 8.10E + 06 | 0.2 |
30 | 9.0 | 245 | 8.20E + 06 | ||
30 | 9.0 | 245 | 8.10E + 06 | ||
45 | 13.5 | 368 | 4.50E + 06 | 4.47E + 06 | 0.4 |
45 | 13.5 | 368 | 4.40E + 06 | ||
45 | 13.5 | 368 | 4.50E + 06 | ||
60 | 18.0 | 490 | 2.00E + 06 | 2.03E + 06 | 0.8 |
60 | 18.0 | 490 | 2.10E + 06 | ||
60 | 18.0 | 490 | 2.00E + 06 | ||
75 | 22.5 | 613 | 9.20E + 05 | 9.07E + 05 | 1.1 |
75 | 22.5 | 613 | 9.00E + 05 | ||
75 | 22.5 | 613 | 9.00E + 05 | ||