The treatment plant in Emmen is a wastewater treatment plant that collects wastewater and rainwater from the Emmen region. At the site, the wastewater is treated in several steps and impurities are removed. The clean water then returns via the Verlengde Hoogeveensche Vaart.
For large-scale maintenance, we drained three aeration basins at the site to prevent them from floating. The aeration system and sedimentation basins were pumped out, cleaned and serviced.
For groundwater drawdown, 125 vacuum filters were flushed to a depth of six meters below the top of the site around the basins. The dewatering system was started up with four electric vacuum pumps. We installed our “I-Real” monitoring system to constantly monitor the groundwater level. Our monitoring system ensures that we can follow the lowering of the groundwater level live and check whether the required lowering has been achieved. The discharge rate was also automatically registered in the monitoring system. The electric vacuum pumps can be frequency controlled by means of a PLC control system. In this way, we ensure that the vacuum pumps can be regulated to the necessary groundwater drawdown level. This is a sustainable method to minimize the energy consumption of the pumping equipment and the fuel costs.
For this project, the following components are integrated in the I-Real online monitoring system:
- Frequency-controlled dewatering by means of a PLC control system.
- Electronic data logger for live monitoring of groundwater level drawdown on site and in the surrounding area
- Electronic water meter for live recording of flow rates and water hazards
