The Domžale-Kamnik CČN capacity:
149.000 PE as per BOD5
| Hydraulic load | |
| Dry weather flow | 25.000 m3/day |
| Rainy weather flow | 52,000 m3/day |
| Detention time | approx 27 h |
| CČN load | |
| Biochemical oxygen demand (BOD5) | 8,940 kg BOD5/day |
| Chemical oxygen demand (COD) | 17.880 kg KPK/dan |
| Total nitrogen (TN) | 1,640 kg TN/day |
| Permitted limit values at the outflow | |||
| Parameter | Expressed as | Unit | Limit value |
| BPK5 | O2 | mg/L | 20 |
| COD | O2 | mg/L | 100 |
| Ammonium nitrogen | N | mg/L | 10* |
| Suspended solids | - | mg/L | 35 |
| *valid for temperatures above 12°C | |||
| Mechanical treatment | |
| Annual amount of waste | 800 t |
| Entry pumping station | |
| Coarse rake screens | Screen spacing 20 mm |
| Screw pumps | 4 x 170 L/s |
| Fine rake screens | Screen spacing 3 mm |
| Aerated grease and sand trap | |
| Volume | 500 m3 |
| Primary clarifier | |
| Volume | 2000 m3 |
| Biological treatment: Aeration basins | |
| Aeration basin volume | 28.000 m3 |
| Number of basins | 4 |
| Capacity of a turbo blower | 6.500 Nm3/h |
| Number of turbo blowers built in | 3 |
| Return sludge pumping station | |
| Return sludge pumps | 25 L/s |
Sludge treatment:
| Digester | |
| Number of digesters | 4 |
| Total volume of digesters | 7.200 m3 |
| Detention time | more than 25 days |
| Mechanical sludge dewatering | |
| Amount of sludge for thickening | 250 m3/day |
| Centrifuge capacity | 60 m3/h |
| Number of centrifuges | 1 |
| Number of centrifuge operating hours | 1500 h/year |
| Dry matter content in the final product | 32% |
| Gasholder | |
| Gasholder volume | 700 m3 |
| Amount of biogase produced | 2.700 Nm3/day |
| Biogas calorific value | 21.600 kJ/Nm3 |
| Methane content in biogas | 60 – 64% |
| Carbon dioxide content | 35 – 39% |
| Other gases content | 1% |
| Gas flare capacity | 200 Nm3/h |
