Table 2.
The concentration of bacteria in different types of samples collected at the power plant
| Types of samples (number of collected samples) | Bacterial concentrations | ||
|---|---|---|---|
| Arithmetic mean | Standard deviation | Range | |
| Bioaerosol [cfu/m3] | |||
| Reloading (2) | 427143 | 23234 | 410714–443571 |
| Separation and sizing (4) | 526683 | 252820 | 237500–705882 |
| Conveyor’s transport (4) | 2481192 | 1927193 | 56250–4119601 |
| Storage (2) | 256410 | 184936 | 125641–387179 |
| Background (2) | 536 | 84 | 476–595 |
| Biomass [cfu/g] | |||
| Wood chips (3) | 105000 | 18457 | 90000–129000 |
| Straw pellets (3) | 4350 | 212 | 4200–4500 |
| Straw briquettes (3) | 7500 | 424 | 7200–7800 |
| Corn briquettes (3) | 5450 | 495 | 5100–5800 |
| Sunflower pellets (3) | 305 | 35 | 280–330 |
| Respiratory masks [cfu/cm2] (20) | 1888 | 577 | 1050–2950 |
| Swabs from hands [cfu/ml] (20) | 14337 | 13991 | 312–35600 |