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Figure 9.
Types of pools and characteristics of their filtration system
| Swimming pool | Type of swimming pool | Filters | Rinsing method |
|---|---|---|---|
| P1 | School, for swimming lessons | 2 × DN 630 mm | Air and water, every 2÷3 days |
| P2 | Water Slide | 2 × DN 2000 mm | Air and water, every 2÷3 days |
| P3 | Bath tube | 1 × DN 1200 mm | Water every 1÷2 days |
| P4 | Sports & Recreational | 2 × DN 1600 mm | Air and water, every 2÷3 days |
| P5 | For toddlers | 2 × DN 1050 mm | Air and water, every 2÷3 days |
| P6 | For toddlers | 2 × DN 1200 mm | Air and water, every 2÷3 days |
| P7 | For swimming lessons | 2 × DN 1800 mm | Air and water, every 2÷3 days |
| P8 | Sports & Recreational | 2 × DN 1800 mm | Air and water, every 3÷4 days |
| P9 | Sports & Recreational | 2 × DN 1800 mm | Water, every 7 days |
| P10 | School, for swimming lessons | 2 × DN 765 mm | Air and water, every 3÷4 days |
| P11 | Sports & Recreational | 2 × DN 1800 mm | Air and water, every 3÷4 days |
| P12 | Recreational with Water Slide | 2 × DN 1800 mm | Air and water, every 3÷4 days |
| P13 | 3 × Bath tube | 3 × DN 1400 mm | Water, every 1÷2 days |
| P14 | School, for swimming lessons | 2 × DN 765 mm | Water, every 5÷6 days |
| P15 | Water Tunnel | 2 × DN 1400 mm | Air and water, every 1÷2 days |
| P16 | Sports & Recreational | 2 × DN 1800 mm | Air and water, every 4 days |
| P17 | Recreational | 2 × DN 1600 mm | Air and water, every 4 days |
| P18 | Bath tube | 1 × DN 800 mm | Water, everyday |
| P19 | Sports & Recreational | 2 × DN 1800 mm | Air and water, every 2 days |
| P20 | Sports & Recreational | 2 × DN 1800 mm | Air and water, every 3÷4 days |
Comparison of impurity indicators values in raw washings with permissible values according to the Polish Regulation [15]
| Indicator | Unit | Average values of impurity indicators | Permissible value | |||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| P1 | P2 | P3 | P4 | P5 | P6 | P7 | P8 | P9 | P10 | P11 | P12 | P13 | P14 | P15 | P16 | P17 | P18 | P19 | P20 | |||
| pH | [-] | 8.17 | 7.52 | 7.44 | 9.13 | 7.82 | 8.16 | 7.87 | 7.54 | 6.78 | 8.62 | 7.88 | 7.54 | 7.79 | 7.40 | 7.47 | 7.53 | 7.09 | 7.39 | 7.20 | 7.51 | 6.50-9.00 |
| Temperature | [°C] | 29.0 | 29.0 | 28.0 | 19.0 | 29.0 | 28.4 | 29.5 | 27.8 | - | - | 23.0 | 22.5 | 20.3 | 24.0 | 23.0 | 28.0 | 31.5 | 35.0 | 28.0 | 23.0 | 35.0 |
| Total nitrogen (TN) | [mg TN/L] | 8.68 | 9.03 | 14.50 | 9.76 | 7.85 | 3.60 | 6.98 | 11.40 | - | - | 23.80 | - | 8.83 | 23.07 | 14.44 | 8.30 | 14.30 | 26.20 | 9.55 | 15.03 | 10.00 |
| Total phosphorus (TP) | [mg TP/L] | 0.29 | 0.02 | 0.73 | 1.26 | 0.01 | 0.20 | 0.36 | 0.94 | 0.05 | 1.26 | 0.52 | - | 1.11 | 1.41 | 1.24 | 0.55 | 0.57 | 0.21 | 0.15 | 1.04 | 1.00 |
| COD | [mg O2/L] | 67.1 | 41.5 | 160.0 | 66.3 | 12.5 | 33.4 | 120.0 | 180.0 | 40.9 | 308.0 | 68.1 | 52.5 | 65.7 | 252.2 | 150.5 | 74.5 | 177.3 | 160.0 | 174.0 | 124.8 | 125.0 |
| BOD5 | [mg O2/L] | 0.7 | 0.7 | 2.3 | 0.4 | 0.4 | 25.0 | 6.0 | 15.0 | 11.0 | 23.0 | 5.5 | 6.0 | 11.4 | 2.7 | 1.7 | 11.0 | 3.0 | 1.0 | 2.5 | 2.3 | 15.0 |
| Free chlorine | [mg Cl2/L] | 0.36 | 0.50 | 0.38 | 0.00 | 0.29 | 0.02* | 0.05* | 0.04* | 0.32 | 2.39 | 0.34 | 0.41 | 0.26 | 0.32 | 0.35 | 0.51 | 0.70 | 0.49 | 0.57 | 0.21 | 0.20 |
| Chlorides | [mg Cl-/L] | 225 | 370 | 108 | 170 | 162 | 40 | 140 | 190 | 71 | 151 | 201 | 158 | 189 | 181 | 36 | 138 | 162 | 83 | 92 | 127 | 1000 |
| Aluminum | [mg Al3+/L] | 0.08 | 0.23 | 0.52 | 2.21 | 0.01 | - | - | - | 0.02 | 0.57 | 0.45 | 0.76 | 0.66 | 0.56 | 0.50 | 0.38 | 0.26 | 0.45 | 0.07 | 0.34 | 3.00 |
| Sulfates | [mg SO44 -2/L] | 437 | 137 | 177 | 238 | 137 | - | - | - | - | - | 310 | 326 | - | - | - | 441 | 98 | 75 | 115 | - | 500 |
| TSS | [mg/L] | 186 | 43 | 367 | 280 | 44 | 200 | 78 | 164 | 46 | 325 | 161 | 112 | 107 | 360 | 67 | 109 | 216 | 187 | 57 | 50 | 35 |
| TSS in supernatant | [mg/L] | 51 | 32 | 20 | 57 | 29 | 20 | 26 | 14 | 21 | 61.6 | 84 | 46 | 26 | 32 | 45 | 17 | 3 | 18 | 17 | 38 | 35 |
| Turbidity | [NTU] | 42.0 | 7.8 | 70.1 | 197 | 4.66 | 533 | 25.6 | 37.4 | 11.2 | 286 | 29 | 92.2 | 94.7 | 281 | 64.2 | 89.5 | 216 | 5.00 | 56.2 | 38.9 | - |
| Turbidity in supernatant | [NTU] | 3.2 | 4.4 | 24.6 | 11.8 | 2.6 | 37.0 | 1.8 | 1.9 | - | - | - | - | - | - | - | 8.3 | 3.0 | 5.1 | 9.0 | - | - |