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Sign upSeptember 6, 2020
Rennes Métropole
Rennes
Rennes Métropole manages the urban water cycle in Rennes and nearby areas, aiming to halve wastewater emissions by 2030. Since 2020, Purecontrol has partnered with Rennes Métropole to support its carbon neutrality strategy, providing AI-powered, real-time solutions to reduce energy costs, cut emissions, and optimize energy-intensive water processes. Purecontrol’s advanced AI enables predictive and automated control beyond typical digital twin technology.
One application optimizes aeration by predicting NH4 loads, adjusting aeration levels in real time based on factors like inlet flow and temperature to reduce energy use. To maximize renewable energy self-consumption, Purecontrol collaborates with solar expert Okwind to synchronize aeration with solar production forecasts. Purecontrol’s technology also reduces chemical use by controlling phosphorus-removal dosing pumps and adjusts aeration cycles to lower nitrous oxide (N2O) emissions with precise emissions modeling.
Implementing the aeration control solution led to a 15% energy reduction. An additional 18% self-consumption increase was achieved by aligning aeration with solar production forecasts, saving 1,200 MWh and avoiding 40 tons of CO₂ equivalent emissions. In the phosphorus removal process, the real-time control solution cut chemical dosing by 50%, favoring biological treatment and adjusting injections based on incoming sludge quality.
Purecontrol uses artificial intelligence technologies to supervise and control in real-time industrial applications leading to energy savings, process improvement, GHG reduction for manufacturers, water companies and renewable energy producers. Purecontrol is deployed by connecting to existing customer programmable logic controllers and changing in real time the control parameters through artificial intelligence. The solution helps to get a better visibility of data through relevant dashboards and analyze the systems or equipment behaviour and consumption, leading to a better understanding of the process and identifying anomalies. The intelligent control of the operations ensures the service continuity, the environmental compliance, and the process optimization.
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