Aspergillus niger
Wan et al. 2020 · 254 nm
Test conditions & context
Type Mold spore (conidia)
Medium Water
Test wavelength 254 nm
Particle size 4000 nm
Author Wan et al.
Year 2020
UV-C dose–response (D-values)
A D-value is the UV-C dose (in mJ/cm²) needed for a given log-reduction. D90 = 90 % inactivation = 1-log; D99 = 99 % = 2-log; D99.9 = 99.9 % = 3-log, and so on. Values come from the cited study under its specific test conditions.
Reduction log Dose (mJ/cm²)
D90 90 % 1-log 43.1 mJ/cm²
Morphology & UV-C resistance
Morphology class Mold spore (conidia)
Fungus present as a conidium (spore): thick cell wall + melanin pigment absorb UV-C — up to 10× more resistant than active hyphae.
Primary source
Wan et al. (2020). doi.org/10.1016/j.watres.2020.115553