Since airborne fungi have been known to aggravate indoor air quality, studies on developing anti-fungal filters increase recently. In this study, silver (Ag) nanoparticle was selected as anti-fungal agent. HEPA filter was coated with silver nanoparticles which were generated via spark discharge system operating at atmospheric pressure and temperature. The anti-fungal effect of the Ag-filter was evaluated with the conventional culture assay. When the number of Ag nano particle per a fungal particle in the filter was 1.91X106, the fungicidal efficiency was higher than 99%. As another anti-fungal test, ATP bioluminiscence detection method was also carried out and the results were correlated with those of the culture assay.

This study was conducted to investigate the application of ATP bioluminescence to measure the degree of microbial contamination from raw meat, meat processing and milk processing lines. Samples collected from slaughter house, meat and milk processing plants were tested for estimation of bacterial number by using ATP bioluminescence and conventional method. The former result was transffered to R-mATP value(log RLU/㎖), and the latter transffered to CFU(log/㎖). Correlation coefficient(r) between aerobic counts(CFU, log/㎖) and R-mATP(log RLU/㎖) value was 0.93(n=408). R-mATP of aerobic counts from beef, pork, chicken was 0.93(n=220), and that was 0.93(n=187) between meat processing and dairy processing plants. In addition, Correlation coefficient(r) between aerobic counts and R-mATP was 0.87(n=252) under 1 × 10^5/㎖ of bacterial count and 0.74(n=152) over l0^5 respectively.