The Topas S 5 WWTP’s main energy consumer is a blower with a power input of about 60 W. Therefore, daily electricity consumption is 24 x 60 = 1.44 kWh/day, which amounts to 525.6 kWh/year. However, this is calculated if the blower works continuously all day/year. The Topas WWTP continuously measures wastewater quantity and automatically reduces air in the WWTP based on the amount of wastewater, leading to substantial energy savings without any maintenance. Therefore, real electricity consumption is much lower, as shown in the following table:
| Daily load | Standard WWTP | TOPAS R WWTP | TOPAS S WWTP |
|---|---|---|---|
| 5 people | 1,4 kWh/ day | 1,2 kWh/day | 1,4 kWh/ day |
| 3-4 people | 1,4 kWh/ day | 0,9 kWh/day | 1,1 kWh/day |
| 1-2 people | 1,4 kWh/ day | 0,58 kWh/day | 0,8 kWh/day |
| 0 people | 1,4 kWh/ day | 0,11 kWh/day | 0,14 kWh/day |