Wastewater

Aeration optimization for wastewater treatment

Optimize aeration management at your wastewater treatment plants while reducing energy consumption.
Thanks to intelligent control, our solution stabilizes discharge quality and improves aeration efficiency.

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Aeration optimization in real-time

Thanks to intelligent NH4 load prediction (virtual sensor), our solution precisely adjusts aeration times to reduce airblowers operating time.
Objective: limiting energy consumption without compromising quality.

Consumption reduction

Thanks to the modelling of a NH4 virtual sensor, Purecontrol precisely adjusts aeration times to the load and favours activation of the aerators during the most advantageous tariff periods. This significantly reduces energy costs.

-15%

energy costs in average

Stabilized discharge quality

By ensuring precise, dynamic control of aeration, our technology enables greater stability of discharge, making it easier to comply with environmental standards.

100%

advanced monitoring and operator alerts

Aeration control in wastewater treatment plants

By constantly analyzing relevant data (inlet flow, oxygen sensor, redox, recirculation, etc.), our algorithms reconstitute a virtual ammonium sensor and predict its evolution at +24H.
Purecontrol sends instructions to the airblowers via control-command based on the evolution of the ammonium load.

Ex. Planification des cycles d’aération optimisée dynamiquement en fonction des charges en NH4 et des tarifs électriques.

1
During peak hours, occasional aeration to keep NH4 levels low in preparation for peak times.

2
At peak times, the low NH4 levels ensured in period 1 mean that aeration is not systematically required, while still complying with regulations.

3
During Off-peak hours, aeration cycles to minimize NH4 charge in anticipation of the next peak hour

4
Planning aeration based on prediction of NH4 levels and inflows

From hypervision to control-command

Simplify day-to-day operations with real-time monitoring and control

Digital twin

PureConnect

PureAnalytics Energy

PurePilot

PureAnalytics Flow rates

Integration of external factors

Virtual sensor

Predictive view

Maximizing self-consumption

Multi-sites demand response

Prediction model for variables of interest, combined with a control model, to identify the optimal operating scenario.

Hypervision platform offering real-time monitoring, customizable graphics, tailored KPIs and alerts for multi-site supervision.

Real-time power analysis without sub-metering, proactive detection of anomalies and calculation of equipment consumption profiles (e.g. kWh/m3 for pumps).

Real-time control of PLCs, applying optimized setpoints from the digital twin (control-command).

Prediction of incoming volumes at +10 hours to anticipate load and aeration requirements according to

Consideration of electricity rates (peak/off-peak), weather forecasts, carbon intensity of electricity.

Modeling of a virtual NH4 sensor based on on-site sensors (dissolved O2 and/or RedOx) for fine control of aeration cycles.

Prediction of Nh4 load evolution and aeration setpoints at +24H

Purecontrol analyzes and predicts on-site solar energy production and controls equipment to maximize self-consumption.

The solution can be used for demand respons management at all Purecontrol-controlled sites, regardless of their power rating, and without the need for any equipment.

Optional

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Rennes Métropole optimizes aeration at its wastewater treatment plants

Faced with the climate emergency, Rennes Métropole optimizes aeration at its stations with Purecontrol AI. Results: -15% on costs, 1,200 MWh and 41 tonnes of CO₂ saved per year.

Download the case study