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The disinfection results of the hoods with different air flow.
| Efficiency of fan power (%) | The PPRPH on No. 2 branch pipe |
The PPRPH on No. 4 branch pipe |
Fumigation chamber |
Positive control | Negative control | |||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| a | b | c | d | A | B | c | d | e | l | |||
| 40 | − | + | + | + | + | + | + | + | + | + | + | − |
| 50 | + | − | − | − | − | − | − | − | + | − | + | − |
| 60 | − | − | − | − | − | − | − | − | − | − | + | − |
| 70 | + | + | − | − | − | + | − | − | − | − | + | − |
Note: The letter represented the position of the stainless steel slides (Figure 6). ‘−’ means no spores growth; ‘+’ means the spores growth.
